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Mini-AT Operators Guide - ogesc, oil and gas equipment supply center

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4. 38 Mini AT Operating Modes v a e eva ede iru esr RE R 45 Meter Reader Mode Detailed Description nennen 47 Elow ate rure ore 58 Audit TPA 59 Calibration 60 J mpers Board 73 Farin Ware eee 71 Takingthe Mini AT incon Ore 522 ere n 87 Shutdown Putting the Mini AT 1040 88 Metin 89 Parts List MinizAT DOOR eee ettet dette 140 Parts List Meter Mount Mini AT enne nenne nenne nitri er eene rein 140 Parts List Wall Mount Minl AT enne nnne nnnnnrenn ener r nensi 142 Drawing Installation for UL Div 1 Hazardous Locations eese 144 Drawing Installation for UL Div 2 Hazardous Locations sss 146 Drawing Installation for CSA Div 1 Hazardous Locations eese 147 Drawing Installation with Turbine Meter CSA eese tnter nnns 149 Index exce teen tee e eit 151 Mini AT Operators Guide Revision List 1 00 Initial Release December 1998 2 00 Format Change to larger p
5. COEFF 5 Default 0 000000 346 P LOG COMP COEFF 6 Default 30 00000 347 PLOGCOMP COEFF 7 Default 0 000000 These are Default 348 P LOG COMP COEFF 8 Default 0 000000 values only 349 P LOG COMP COEFF 9 Default 0 000000 350 COEFF10 Default 30 00000 351 COMP COEFF 11 Default 0 000000 352 PLOGCOMP COEFF12 Default 0 000000 353 PLOG COMP COEFF 13 Default 0 000000 354 PLOGCOMP COEFF14 Default 30 00000 355 COEFF15 Default 0 000000 356 PLOG COMP COEFF 16 Default 0 000000 357 PLOGCOMP COEFF17 Default 0 000000 358 COEFF 18 Default 30 00000 359 PLOGCOMP COEFF19 Default 0 000000 360 PLOGCOMP COEFF20 Default 0 000000 361 PLOGCOMP COEFF21 Default 0 000000 362 PLOGCOMP COEFF22 Default 30 00000 363 PLOGCOMP COEFF23 Default 0 000000 See information 364 COEFF24 Default 0 000000 below for more 365 PLOGCOMP COEFF25 Default 0 000000 details 366 PLOGCOMP COEFF26 Default 30 00000 367 PLOGCOMP COEFF27 Default 0 000000 368 PLOGCOMP COEFF 28 Default 0 000000 369 PLOGCOMP COEFF29 Default 0 000000 370 PLOGCOMP COEFF30 Default 30 00000 371 PLOGCOMP COEFF31 Default 0 000000 372 PLOGCOMP COEFF32 Default 0 000000 Item codes 341 thru 372 are the 32 PLog pressure transducer compensation coefficients These values determine the pressure response over the entire operating temperature range and are unique for e
6. SMOVJ m ek k xL ANO 1 AMSLIVE AINO H3MOd Alddns 5 T E 971215 IOHLNO2 Z8 y LYOd 1199 SH3HOLOVAJONVIA SONVOHOOOV 291 OL 1 DD NI GATWLSNI 38 OL SH3lHHv8 ee A A 8 lt JVINJS Hx 3 906 ZHM Z 3dAL Ze Sei GSN SESE SOS 7101 041 980 10 1006 uo IN 1691 0 2 lt 1 1 lt 068 THVLS 2 LX J de Um LJ UE 5 ee NIVIA D9ES D LOL MN LNAHS ag S3lONx SNOdHYVZVH NON SnodqavzvH ini AT Mercor M Page 144 AT Operators Guide Inl M Gat 2 40 2398vd iva IZIS 26 20 80 32N3383433 GNA SNOILvVOO SOOQOMNHVZVH Ald NOLLYIIVLSNI 19 OORHSIA SIN3IARQSISNI HOLMS JAI LIOvd VO NON 3ALODnONI NON 3ALSIS3H 3AISSVd 039109 ANY NO NMOHS Sv ZLZ OLZ 13004 NVI HOIIMS JLOWSY ILON Ol 0350 SI H3HIJO9Ol SIVNINS3I J3dWDfP ONY L HOLMS MANOJ 3NO NINO 4l OSIVNIAB3L ISNA HOLIMS Ye 503 ILON
7. GAS TEMP HILIM REF TEMP 71 REF TEMP 2 CASE TEMP CASE TEMP MAX CASE TEMP MIN BASE TEMP TCAL ZERO 1 PREV TCAL ZERO 2 PREV TCAL ZERO Page 92 Description High limit for temperature initiates alarm items 106 and 146 if exceeded Also used with Item 004 Default 165 00 The temperature value used during the most recent TZERO calibration Default 0 00 The temperature value used during the most recent TCAL calibration Default 0 00 Temperature measured inside instrument case at last wake up Default 0 00 Highest case temperature measured by unit since last manually reset Default 40 00 Lowest case temperature measured by unit since last manually reset Default 099999 99 Base temperature per the contract used to calculate temperature correction factor item 045 Default 60 00 The most recent offset value for the temperature transducer obtained during a T Zero calibration The value is normally very close to 0 0000 and is recalculated during each Temperature Zero Calibration Default 0 0000 The previous value of item 035 updated on each Temperature Zero Calibration Default 0 0000 The previous value of item 036 updated on each Temperature Zero Calibration Default 0 0000 Mercor Mini AT Item 038 039 040 041 042 043 044 045 Mini AT Operators Guide Item Name TCALSPAN 1 PREV TCAL SPAN 2 PREV TCAL SPAN MIN TCAL PT DIF XC
8. pulse cycle 500 Sec Page 42 Mercor Mini AT Mini AT Operators Guide Pulse Output Scaling Factor Item 56 amp 57 Form A type output Selected Volume Units Desired Pulse Output Value 90 91 amp 92 CuFt CuFt CuFt m3 CuFt X X X X Units 10 100 10 000 0 1 CuFt 2 00000 0 20000 0 02000 0 00200 0 00020 0 56634 0 05663 CuFtx 10 20 00000 2 00000 0 20000 0 02000 0 00200 5 66340 0 56634 0 05663 CuFt x 100 CCF 20 00000 2 00000 0 20000 0 02000 56 63400 5 66340 0 56634 0 05663 CuFt x 1 000 MCF 20 00000 2 00000 0 20000 56 63400 5 66340 0 56634 0 05663 CuFt x 10 000 20 00000 2 00000 56 63400 5 66340 0 56634 m3 x 0 1 7 06290 0 70629 0 07063 2 00000 0 20000 0 02000 0 00200 0 00020 m3x1 0 70 62900 7 06290 0 70629 0 07063 20 00000 2 00000 0 20000 0 02000 0 00200 m3 x 10 70 62900 7 06290 0 70629 0 07063 20 00000 2 00000 0 20000 0 02000 m3 x 100 70 62900 7 06290 0 70629 20 00000 2 00000 0 20000 mexo a 70 62900 7 06290 20 00000 2 00000 Table 6 Form A Pulse Output Scaling Mercor Mini AT Page 43 Mini AT Operators Guide Pulse Output Scaling Factor Item 56 amp 57 Form C type output Selected Volume Units Desired Pulse Output Value Item 90 91 amp 92 CuFt CuFt CuFt m3 CuFt X X X X Units 10 100 10
9. 10 Compare the displayed pressure to the atmospheric pressure If the Mini AT s absolute pressure reading is not acceptable click the Average Pressure Now button again to obtain another pressure sample The program will continue to loop back to the live pressure reading Obtain as many pressure samples as necessary until an acceptable pressure reading 1s displayed Mercor Mini AT Page 63 Mini AT Operators Guide 11 Ifthe Mini AT s absolute pressure reading is acceptable click the Span button to change to the Span Calibration sequence 12 Thescreentitle should have changed to Pressure Span Calibration Atthis point the software is waiting to sample the applied pressure that exceeds the zero reference pressure by at least 50 of the rated pressure transducer range Increase the pressure applied to the Mini AT to the span reference pressure Example 1 Ifthe zero reference pressure ona 100 PSIA transducer equals 14 73 PSIA then the span reference pressure must be between 64 73 and 100 00 PSI Example 2 Ifthe zero reference pressure ona 100 PSIA transducer equals 13 25 PSIA then the span reference pressure must be between 63 25 and 100 00 PSI Example 3 Ifthe zero reference pressure ona 600 PSIA transducer equals 14 73 PSIA thenthe span reference pressure must be between 314 73 and 600 00 PSI 13 The span calibration also displays a live pressure reading to allow the user to determine if the span reference pressure
10. 4 80 Voltage level of the Backup Battery measured at the most recent wake up Default 0 00 Low voltage limit for Backup Battery initiates alarm item 101 if voltage drops below this value Default 3 60 Specific gravity entered by the user for calculating NX 19 Supercompressibility factor at item 047 Default 0 6000 Percentage of Nitrogen molecules entered by the user for calculating NX 19 supercompressibility factor at item 047 Default 0 0000 Percentage of Carbon Dioxide molecules entered by the user for calculating NX 19 supercompressibility factor at item 047 Default 0 0000 Mercor Mini AT Item 056 057 058 059 060 061 Mini AT Operators Guide Item Name PULSER A SCALING PULSER B SCALING PULSER C SCALING BATT WAKE CYCLES BATT CYCLES LIM DISPLAY TEST Description Scaling factor that determines the volume per pulse for channel A pulse outputs when item 093 is set to CorVol UncVol or PcorVol Default Scaling factor that determines the volume per pulse for channel B pulse outputs when item 094 is set to CorVol UncVol or PcorVol Default Scaling factor that determines the volume per pulse for channel C pulse outputs when item 095 is set to CorVol UncVol or PcorVol Default A number incremented by 1 for each correction cycle wake up i e each meter revolution The value should be manually reset back to zero when a new battery pack is in
11. Certifications UL certified for Class I Divisions 1 amp 2 Group D CSA certified for Class I Divisions 1 amp 2 Groups C amp D Mercor Mini AT Page 7 Mini AT Operators Guide JB900 Terminal Strip Connector for Modem J3 I JB 24 J6 J4 Backup Battery Pack 3 AA alkaline J26 JB31 32 JB 30 Pulse Outputs Figure 1 Diagram ofthe Mini AT board location of primary connections and jumpers Page 8 Mercor Mini AT Connector Jumper J2 J3 J4 J5 16 J7 J8 J9 J10 J20 J21 122 J23 J26 J27 J28 JB24 JB29 JB30 JB31 JB32 JB900 TBI TB2 Mini AT Operators Guide Purpose Connection for Field Calibrator Connection for LCD Display Connection for KYZ Pulse Channels Connection for Temperature 1 input Connection for local Serial Port Connector Connection 1 for Main Battery Connection 2 for Main Battery Connection for UncVol Switch Input Connection for PCor input Connection for Aux Modem Connection for power to Aux Modem Connection for SPI Bus Connection for BDM Port Connection for Backup Battery Connection for Temperature 2 input Connection for Plog input Jumpers 5 position to enable Loader Unconfigure Flash Upgrade Serial Access Event Log Lock Jumpers 2 position to select pulse width for K Ya and KYb Jumper to select Form A or Form C Jumper to select Form A or Form C Jumper to bypass current limit resistor for specific Pulse Input Circuits J
12. Level 1 amp Level2 Access Modes permits data transfer to and from the instrument s on board memory Any RS 232 serial device can be connected to the instrument s serial port but the serial device must be able to communicate using Mercury s serial data protocol A Mercury Modem or Messenger Modem may be installed in the Mini AT enclosure and share power from the main battery see wiring diagram on page 135 Modem operationis supported by a second serial port TB2 Modems are generally used to transfer data audit trail from a remote location to a host computer All RS 232 devices require Mercury s Serial Protocol for Mini AT in the communication driver Meter Reader Mode Detailed Description During normal operation the Mini AT 15 operating in the Corrector Mode To obtain information in addition to corrected and uncorrected volume any person with a magnetic wand may access the instrument s Meter Reader Mode The Meter Reader Mode provides the ability to display a predeter mined number of items on the LCD display without opening the instrument door The number of selected items to be viewed can range from none to eighteen The selected items may be any of the instrument s item codes Upon entering the Meter Reader Mode any active alarm s is always displayed prior to the selected items When enabled the Mag Alarm Acknowledge item 128 will permit all alarms to be cleared using the mag wand If desired live gas pressure and live gas t
13. 414 The date is automatically inserted into item 410 when exiting the PLog CAL ZERO calibration function Default 01 01 98 Serial number of the PLog pressure transducer printed on the transducer label manually inserted at the factory Note forcing Factory Defaults will not change the value ofthis item Default 00000000 Mercor Mini AT Page 133 Mini AT Operators Guide Item No Item Name Description 412 PLOGTRANSDUCER The upper range limit of the PLog pressure transducer always 413 PLOG REF PRESS 1 414 PLOGCAL ZERO 415 1 PREV PLOG CAL ZERO 416 PLOGREF PRESS 2 417 PLOGCALSPAN 418 1PREV PLOG CAL SPAN 419 PLOG XDCR RANGE 420 PLOG GAS PRESSURE Page 134 expressed in PSI Default 100 00 The PLog pressure value used during the most recent PLog ZERO calibration Default 0 00 The most recent offset value for the PLog pressure transducer obtained during a PLog Zero calibration The value is normally very close to 0 0000 and is recalculated during each PLog Pressure Zero calibration Default 0 0000 The previous value of item 414 updated on each PLog Pressure Zero Calibration Default 0 0000 The PLog pressure value used during the most recent PLog SPAN calibration Default 0 00 The most recent span value for the PLog pressure transducer obtained during a PLog Span calibration The value is normally very close to 1 0000 and is recalculated during each PLog Pressure S
14. Default ATDT Telephone number dialed when Alarm call in is executed Character string used by to disconnectmodem communications Default ATH Retry period A in minutes Intended to be the primary retry Default 5 Retry period B in minutes Intended to be the secondary retry Default 1440 Number of period A retries Default 3 Mercor Mini AT Page 137 Mini AT Operators Guide 3 meg see view B SUN SSS SANNA S25 Yt am HS 2 view B 8 7 RormD 90 cew SCALE 2 1 Mini AT Door Page 138 Mercor Mini AT Mini AT Operators Guide 3 Mini AT Door Parts List Item Qty Part Description ONE NN 6 1208788 Door 8 1 208286 Gaske Window 9 1 202196 Gasket Door Label MCF CCF nj Mini AT Door Options Item Qty Part Description Call Label Window 20 4215 w o Hasp Mercor Mini AT Page 139 Mini AT Operators Guide Meter Mount Mini AT Page 140 Mercor Mini AT Mini AT Operators Guide EA 9 Filter Cable Tie 60 60 1249 6 32 x 5 16 Self Tap 5 60 1607 Hex 1 4 20 Mini AT Meter Mount Options 30 Adapter Assembly 1 Union EB Mercor Mini AT m 0 8925 Drilled 20 8689 Plate Bent Strike 20 2191 C
15. Dry reed switch for uncorrected volume second switch optionally available SPA Board optionally available Memory Audit Trail 140 days of hourly e Event Log 500 records e Alarm Log 200 records Flash Resident firmware upgradable via laptop E PROM Resident pressure compensation coefficients and critical calibration configuration item values Accuracy Maximum error at reference conditions including linearity repeatability and hysteresis Computation 0 1 of corrected vol reading Pressure transducer 0 25 of full scale Temperature Sensor 0 5 Combined computation 0 25 of full scale pressure amp temperature Ambient Temperature Effects From 40 F to 170 F 409C to 76 6 C Computation 0 1 of corrected vol per 100 F Pressure Transducer 0 3 of full scale per 1009F Temperature Sensor No effect Long Term Stability Computation 0 1 of corrected vol per year Pressure Transducer 0 3 of full scale per year Temperature Sensor 0 2 per year Environmental Conditions Ambient Temperature 409F to 170 F 409C to 76 69C Ambient Humidity 0 to 10096 noncondensing Enclosure Cast aluminum alloy surface treated baked enamel paint Lexan viewing windows for uncorrected mechanical index corrected volume LCD Stainless steel door latch with padlock hasp Mounting plate with gasket and bolts to accommodate most meters
16. List1 amp 2 List 1 amp 2 Live Example 4 Suppose Display Test Site ID Corrected Volume Uncorrected Volume Live Gas Pressure Live Gas Tempera ture Gas Pressure Maximum Unsquared Super Battery Voltage and Case Temperature are the only items desired for the meter reader list However item number identification is also desired for both mag lists The item code numbers listed below would be configured as follows Item Item Legend Selected Description Code Item 075 Mag List 2 Item 1 009 Gas Pressure Maximum 076 List 2 Item 2 047 Unsquared Super 077 MagList2 Item 3 048 Battery Voltage 078 Mag List 2 Item 4 031 Case Temperature 079 Mag List 2 Item 5 255 End Of List 080 Mag List 2 Item 6 255 End Of List 081 Mag List 2 Item 7 255 End Of List 082 Mag List 2 Item 8 255 End Of List 083 Mag List 2 Item 9 255 End Of List 084 Mag 11512 10 255 End Of List 085 Mag List 2 11 255 End Of List 086 Mag List2 Item 12 255 End Of List 129 Live Display Enable Live PCor amp T Live PCor Pressure amp Temperature 130 Mag List 1 Item 1 061 Display Test 131 Mag List 1 Item 2 200 Site ID 132 Mag List 1 Item 3 000 Corrected Volume 133 List 1 Item 4 002 Uncorrected Volume 134 Mag List 1 Item 5 255 End Of List 135 Mag List 1 Item 6 255 End Of List 136 Item Number Enable List 1 amp 2 Item Number Identification for Mag List 1 and Mag List 2 Page 56 Merco
17. Mini AT Operators Guide 2 Point Temperature Calibration Items Required Mini AT cold temperature source ice bath hot temperature source heated water not to exceed 170 degrees Temperature Reference calibrated thermometer Computer IBM Compatible Mini AT Link or MasterLink32 Software cable p n 40 1629 Back View Pressure Transducer RS 232 Port Case Connector Temperature Probe Calibrated Calibrated I O Cable p n 40 1629 Thermometer Thermometer Ice Bath Fig 21 2 Point Temperature Calibration 2 Point Temperature Calibration Procedure Refertofigure21 whentemperaturecalibratingthe Mini AT Sincethetwo point calibrationis mostly asoftware function referencesto the appropriate sections inthe Mini AT Link software are included 1 Prepare an agitated ice bath and a container of heated water 2 Using serial cable p n 40 1629 connect from the computer s serial port to the Mini AT s RS 232 port Page 68 Mercor Mini AT Mini AT Operators Guide 3 Start Mini AT Link software the computer 4 Enter the access code for Level 1 or Level 2 when requested The default Level 1 Access Code is 11111 the default Level 2 Access Code is 22222 5 Ifacommunications link has not yet been established the screen will display a box requesting the user to input the Instrument Access Code Enter the access code when this box appears the default code is 33333 6 Select Calibrate from th
18. or MasterLink32 are None Live PLog Live PCor Live PCor amp PLog Live T Live PLog amp T Live PCor amp T Live PCor T amp PLog Example 2 Suppose Display Test Corrected Volume Uncorrected Volume Live Gas Pressure and Live Gas Temperature are the only items desired for the meter reader list Since items 008 and 026 do not provide a live reading it is necessary to configure Item Code 129 as shown below Note Remember all Mag List 1 amp 2 items have a 1 minute time out and both live parameters have a 10 minute time out Item Item Legend Selected Description Code Item 075 Mag 11512 1 255 End Of List 129 Live Display Enable Live PCor amp T Live PCor Pressure amp Temperature 130 MagListlItem1 061 Display Test 131 Mag List 1 Item2 000 Corrected Volume 132 Mag List 1 Item3 002 Uncorrected Volume 133 Mag List 1 Item 42 255 End Of List 134 List 1 Item 52 255 End Of List 135 List 1 Item 62 255 End Of List Page 52 Mercor Mini AT Mini AT Operators Guide ALARMSCODE ALARM es DISPLAY ASOUTLINED p a FIGURE 12 1 MINUTE TIME OUT 1 MINUTE TIME OUT 1 MINUTE TIME OUT Examplesof LCD Displays LIVE PCor GAS PRESSURE MAG WAND 10 LIVE GAS MINUTE TEMPERATURE MAG WAND Fig 16 Meter Reader List For Example 2 TIME OUT Mag List 2 Mag List 2 consists of twelve item codes 075 086 which define what items will appear in s
19. total pulse cycle in milliseconds One Form A pulse cycle is equal to the pulse on time plus the pulse offtime The standard pulse on time for a Form A output is 62 5 milliseconds Any remaining time is off time The pulse width from a Mini AT may be changed by installing shunt resistors at JB29 Note If the Form A pulse width is changed from 62 5 milliseconds item 115 must be set to a value equal to or greater than twice the pulse width Example With a shunt resistor for 250 millisecond pulse installed at JB29 item 115 would normally set to code 4 However item 115 may also be set to codes 1 amp 2 but not to codes 0 amp 3 Form C Form A Select 0 62 5 125 Default 1 500 1000 2 1000 2000 3 125 250 4 250 500 Supercompressibility factor squared Fpv i e the square of the value at item 47 The value at item 116 is one of the factors included to obtain Total Correction Factor item 43 Default 1 0000 User assigned tag number for instrument Default 00000000 User assigned reference number Has no specific function other than to provide a convenient location to store an integer number for an undefined purpose Default 00000000 A second user assigned reference number Has no specific function other than to provide a convenient location to store an integer number for an undefined purpose Default 00000000 Mercor Mini AT Page 105 Mini AT Operators Guide Item No Item Name 120 PCORPRESS CAL DAT
20. with jumper on pins 5 amp 6 Serial Access Security Jumper Pins 7 amp 8 of Jumper Block 24 JB24 provides Serial Access Security If a jumper is across pins 7 amp 8 when aserial connection is established TWO WAY serial communications is allowed regardless ofthe setting at Item Code 139 Serial Link Code Also with the jumper installed the Instrument Baud Rate item 126 and Modem Baud Rate item 272 are forced to operate at 9600 baud When the jumper across pins 7 amp 8 is removed the configuration of Item Codes 126 139 and 272 are obeyed By default the jumper is removed 246810 13579 JB24 with jumper on pins 7 amp 8 Mercor Mini AT Page 75 Mini AT Operators Guide Event Logger Lock Jumper Pins 9 amp 10 of Jumper Block 24 JB24 provides a hardware requirement when attempting to lock the Event Logger through software A jumper across pins 9 amp 10 is required to allow host software to set the lock condition for Item Code 149 By default the jumper is removed 24 6 810 2522 13 579 JB24 with jumper on pins 9 amp 10 Besure to read and understand the restrictions involved before attempting to configure the Event Logger Lock Once the Event Logger is Locked the jumper may be permanently removed The function ofthe Event Logger is to record Date Time UserID assigned Sequence Number Before Value and After Value for changes made to instrument parameters
21. 15 Mini AT Operators Guide When the microprocessor has completed the updating ofits memory registers and item codes it will update the LCD with the new corrected volume information The microprocessor will then power down most of the main board circuits and transmits corrected volume pulses if Item Codes 093 094 or 095 were config ured for pulse output Otherwise the main board will go back into the asleep mode waiting for the next uncorrected volume input pulse Three other conditions can cause the Mini AT to wake up while in the Corrector Mode They are Mag Wand Input a Serial Communication Link or a scheduled audit trail log entry A Mag Wand Input is caused by passing a magnetic wand across the Mag Read Switch located on the LCD Dis play Board A Mag Wand Input will cause the microprocessor to initiate the Meter Reader Mode A wake up caused by a Serial Communication Link will allow the instrument to talk to serial devices connected to either of the RS 232 ports local or modem An audit trail wake up occurs at regular time intervals as specified by the user at Item Code 202 In all three cases the microprocessor will initiate a full correction cycle as described above Except for audit trail wake ups after the comple tion of the correction cycle most main board circuits will remain energized while the instrument is performing the user requested tasks Drive Input A universal mounting bracket containing a standar
22. By default the Event Logger is unlocked meaning old event records begin to be overwritten after 500 event changes The Event Logger Lock is a feature that can only be enabled through software if a jumper is across pins 9 amp 10 of JB24 Once enabled Locked the functionality ofthe Event Log conforms to Canadian regulations as specified by Measurement Canada Several key Canadian requirements include e Units shipped to Canada will be factory configured with the Event Logger Locked e After the Event Logger Lock is selected the Lock is permanent i e it cannot be changed back to Unlocked When the maximum number of event records stored in memory is reached 500 the Event Log information must be downloaded to a computer before any additional instrument changes are permitted e Events records are automatically numbered sequentially starting at zero e Only changes to instrument parameters that can affect Billing are recorded in the Locked Event Logger all other parameters are not recorded Page 76 Mercor Mini AT Mini AT Operators Guide Firmware Reprogramming Mini AT firmware instrument operating program is stored in flash memory Adding new features and capabilities to the instrument is simply a matter of uploading a file containing a newer version of firmware through the serial port connection There are no EPROM chips to be removed or plugged into sockets Flash Access Security is provided by the u
23. Display Mag List 1 Live Parameters Display Mag List 2 Item Number Enable Mini AT Operating Modes Corrector Mode Meter Reader Mode Level 1 Access Mode Level2 Access Mode Modem Communicating with the Mini AT Page 152 Mercor Mini AT 15 16 16 16 16 17 17 17 18 21 21 22 23 23 23 26 26 89 73 74 74 75 75 76 47 47 48 51 51 53 56 45 45 45 46 46 31 Mini AT Operators Guide Modem Power Sharing Cable Assembly Pulse Outputs Alarms Pulse Outputs Volume Configuring for Form A volume pulse output Configuring for Form C volume pulse output Output Pulse Specifications Quick Start Guide Receiving the Mini AT Function Check Pressure Function Check Gauge Transducer Pressure Function Check Absolute Transducer Temperature Function Volume Function Check Report By Exception RBX Serial Connector Shutdown Putting the Mini AT into Specifications Unconfiguring the Mini AT Mercor Mini AT 35 37 38 39 40 41 10 19 19 19 19 19 20 36 30 88 87 153 Mini AT Operators Guide Page 154 Mercor Mini AT
24. GTM Selection Board Type Jumpers 1 3 Mini Gas 4 12 GIM Table2 HFIJumperSelections DTE 999000 I I 0000000 17 UO 00000 MERCURY INSTRUMENTS INC MADE IN USA ASSY 40 1313 ar asim 1E H Iz IM Sr 1353 oer AOE Figure6 HFI Board Mercor Mini AT Page 25 Mini AT Operators Guide on the HFI board is used to connect the turbine meter coil wires The wires must be connected as indicated in Table 3 below TB1 Label TB1 Position Funtional Description Low level input signal low side Either coil Low level input signal high side Either coil Not required for GTM applications at this Not required for GTM applications at this Table3 HFI Wiring Connections High Frequency Input Software Meter Scaling Version 1 HFIB This software is used to calculate Meter Scaling Item 114 when using an HFIB in conjunction with a turbine flow meter The Meter Scaling calculation is based upon answers to a few simple questions prompted by the program High Frequency Input Software Pulse Generator Version 1 HFIBTEST This software is used to test the scaling accuracy ofthe HFIB by sending a specific number of pulses to the HFIB If properly configured the Corrected Volume displayed on the LCD will increment by a value of 1 atthe end ofthe test When prompted the user provides the spec
25. INGIL do HOLOS3NNOO NILYN ZZSL O0ts HOLOS3NNOO 38VO l1HOd WINES 701 ES c ox s S3s Ind ANNOYS S Hdlduvgd HOLIMS JHL OL asand EG unns awal GSLOSNNOS 38 p E HO NAOHS SV SHilHHVB 3lvHvd3S J 0 Wav lV NAM 38 AYN SNH L3H HOLIMS 76 2 2 3dAL TAL 281 0r HO 3NO NYHL ayoa 5527 VHS GNnNONS HlHv3 OL HlSsv3 4 8 IWNOILdO GNNONS 3ONVISIS3H 8 LX SL10A OSZ NVHL SHOW 3LV3N39 MO 3SN LON TIWHS INIA YOSIN IHL E AT OL Q31293NNOO LN3WdInoOd 2 mS OG 31OLHVv 02 VddN ISNY eed 3000 TvOIMIO3T13 TYNOILY SSK a 3IACQ DA 329NVOHOOOv NI GSTIWLSNI Rom Nn 38 TWHS ONIMIM 34VS ATIVOISNIBINI 79 ROME SEE 1334 005 SHudlWNva HISV3 27 g 3Snd JILIN 3dAL OL HLONST 31B8VO G x N3O138H SUSCI m dais Sv HONS QXO3Q 3IH8 gL asm Gos 1334 OO SI SHaINNVS BEA MO SddAL OL HLON31 371BVO v EIE Ex x goe 1334 01 5 x TCR mim ps 1 HLON31 318vO JAIL gl Ler 2131 SLLL Ov H3MOd H3ISHVH S Woo S9gL oOv 566
26. NMOHS 38 NYJ INdNI HOIIMS ILONAA 310N pe INIA OOS3IA BI ININ HOOS3IN ci SL6L OF 01 zh e TI INANI Dr e AON3nO3H4 LH U gax J Ig HOIH 0 AO 1 519 LI NOLLVOO1 SnOQ3vzvH NO NOLIVOO1 SnOQMVvzvH Page 145 Mercor O SVLl OV ZF 3215 dd MS X3QNI ea Addy 6 Ic cl TAAL 31928 39N333433 7 9 NO Nouvan8IJNOO Lv ININ 303 dilv da O GA SNOLLVOO1 SNOdHVZVH Z AIG INOLINCTTV NI ININ AT Operators Guide ini M SIN3IQMISNI ADMIN 081 9106 09 081 X 6691 09 0 c96L Ov 79 13599 NI LNSWAMLSNI SNOLIVIINIT LAdLNO LAdNI e HOJIMS 3ALLIOV d VO NON 3ALOQQNI NON 3ALSIS34 3AISSVd Q31VIOSI ANY NMOHS Sv ZLZ OLZ TAGQW 38 HOLIMS 31033 H3HI3OOLl v SIVNIWS3L TVNIAM3I OL SHIM 0350 SI HOIIMS AJOJ 4l y STWNIWS3L ISN Sind HOLIMS Ve NJOJ SALON NOIIVOO1 SNOUYVZVH NON
27. Open MasterLink32 software 2 Connect the Serial Cable 40 1629 from round connector on the back ofthe Mini AT to the computer COM port PC Running MasterLink32 version 3 30 MINI A 1 3 From the Transfer Menu select Read Item File MasterLink32 File Calibrate Display Instrument Reports Graphs Setup Transfer Help OPEP E dn 2 Read Audit Trail i Read Event Log Read Alarm Log Read Shart List Items Send Non Cal Items Send Cal Items Send Authorization T able Send AGAS Factors ix Not Connected Access Level 2 2 40 PM 10 13 2003 Page 78 Mercor Mini AT Mini AT Operators Guide 4 MasterLink will establish a link with the Mini AT and display a dialogue box Type in a name for the item file and click the Save button MasterLink will then save all items to a file with the selected filename Save in Ci Al ei 21 0004858 ima 21 0205878a ima a 0104133a ima 2 2156006 ima a socaltoc3 IM 0107033a ima Goochs2 IM 2 0108930 Kreisel 01 2001 e 0204856 PPGITEMLIST IMA File name 000000 Save type Mini AT Item Files IMA Caes 5 After the item file is downloaded click OK and then select Read Audit Trail from the Transfer Menu WMasterLink32 File Calibrate Display Instrument Reports Graphs Setup Transfe r Help A ZA LS ILL Re
28. Single Point Pressure Calibration allows the user to check and adjust any pressure reading up to the transducer s maximum rated pressure During a single point calibration the user compares the Mini live pressure reading to a reference pressure More than one pressure reading may be compared 1 Zero pressure and line pressure are two convenient pressures to check Ifthe two pressure readings agree the instrument is assumed to be calibrated If both pressure values do not match the Mini AT s pressure reading may be adjusted until it agrees with the reference pressure The Mercor Mini Field Calibrator is used to make adjustments to the live pressure reading Live Pressure is a programmable feature of the Meter Reader List While viewing the live pressure press the UP or DOWN button will raise or lower the pressure reading respectively Pressing and holding down either button will fast scroll the reading Pressing and quickly releasing either the UP or DOWN button will change the pressure by 0 01 PSI The new pressure reading is locked in when the ENTER button is pressed If the ENTER button is not pressed no change will take place and the field calibrator can be removed without any change to the calibration When the ENTER button is pressed the microprocessor will recalculate a new Pressure Zero parameter and update Item Code 017 414 for PLog to the new value as described in step 9 of the 2 point calibration This digital calibration
29. acceptable click the Span button to change to the Span Calibration sequence 12 The screen title should have changed to Temperature Span Calibration At this point the software is waiting to sample a temperature that exceeds the zero reference temperature by at least 10 of the instruments s temperature range 1 e a temperature greater than 53 0 degrees F Insert the temperature probe into the container of heated water 13 The span calibration also displays a live temperature reading to allow the user to determine if the span reference temperature has stabilized When the temperature has stabilized click the Average Temperature Now button when it becomes active to obtain a temperature sample 14 Ifthe average temperature reading is not equal to the span reference temperature click the Change button when it becomes active Enter the temperature value from the thermometer in the heated water bath and then click OK As the computer screen updates the Mini AT will calculate the required span gain store this calculated value at Item Code 038 display the new values for items 035 and 038 display the previous values at items 036 and 039 before returning to a live temperature reading Obtain as many temperature samples as necessary until an acceptable span temperature reading is displayed 15 Compare the average temperature reading to the span reference temperature If the average temperature reading is acceptable the t
30. and date and finish the instrument setup MasterLink32 Current Computer Date Time 10 15 2003 10 15 46 Current Instrument Date Time 01 03 03 06 11 55 You are about to set the instrument date and time to the current computer time Do you want to continue Page 86 Mercor Mini AT Mini AT Operators Guide Taking the Mini AT Unconfigured Unconfigured refers to returning the internal memory parameters back to factory default settings After the Mini AT goes unconfigured historical data such as Audit Trail Event Log and Alarm Log information totalized volumes calibration information and instrument settings are all cleared Therefore if this data is needed for any reason download the audit trail information event log and item files before taking the Mini AT unconfigured Specific information about downloading these files is available in the Mini AT Link Software Manual Use the following steps to take the Mini AT Unconfigured 1 2 3 4 3 6 7 Put the instrument into Shutdown using Mini AT Link for Windows or MasterLink32 software Unplug the main battery cable at J7 or J8 and the backup battery cable at J26 from the main board Place a jumper between pins 3 and 4 on JB24 See figure 1 on page 8 for the approximate location of JB24 on the main board and refer to page 74 for information on JB24 Plug in the main battery cable or alternative power source It is impor
31. batteries are plugged in incorrectly the LCD will display H E L P see page 36 for more info on HELP mode If this occurs unplug both batteries and wait until the LCD goes blank At this point plug in the main battery then the backup battery The Mini AT 1 now fully powered A low voltage battery alarm will occur when either the main battery or the backup battery runs low on power Mercor Mini AT Page 29 Mini AT Operators Guide Serial Connector The Mini AT s serial connector permits datatransfer to or from the instrument s on board memory Any RS 232 serial device can be connected to the instrument s serial port but the serial device must be able to communicate using Mercury s serial data protocol Modem operation as well as local serial connections are supported by MasterLink32 and Mini AT Link software All other third party software and RS 232 devices such as Automatic Meter Reader equipment require Mercury Serial Data Protocol to be incorporated into the communication drivers Refer to figure 9 below when making connections to the local RS 232 serial port The I O cable p n 40 1629 incorporates alignment tabs anda locking ring Align the widest tabto the top and push connector into the port as far as it will go Turn the outer locking ring clockwise to lock the cable in place Locate the serial port on the laptop computer it may be labeled COM1 COM2 RS 232 or just Serial Connect the I O cable DB 9 connector to
32. be entered as a Mag Read Item Default 200 Site ID number Item number ofthe next Mag List 2 item Any item code may be selected or enter the value 255 at this item to indicate the End of List Default 113 Hi Res CorVol Same as Item 76 above Default 013 Base Pressure Mercor Mini AT Page 97 Item 078 079 080 081 082 083 084 085 086 087 088 Mini AT Operators Guide Item Name MAG LIST 2 ITM 4 MAG LIST 2 ITM 5 MAG LIST 2 ITM 6 MAG LIST 2 ITM 7 MAG LIST 2 ITM 8 MAG LIST 2 ITM 9 MAG LIST 2 ITM 10 MAG LIST 2 ITM 11 MAG LIST 2 ITM 12 PCOR PRESS UNITS PCOR PRESS DISPL RES Page 98 Description Same as Item 76 above Default 014 Atmospheric Pressure Same as Item 76 above Default 025 Press Transducer Range Same as Item 76 above Default 044 Pressure Corr Factor Same as Item 76 above Default 043 Total Corr Factor Same as Item 76 above Default 048 Battery Voltage Same as Item 76 above Default 031 Case Temperature Same as Item 76 above Default 203 Time Same as Item 76 above Default 204 Date Same as Item 76 above Default 255 End of List Code 0 9 that selects the unit of measure for Gas Pressure 008 and other pressure related items Select 0 PSIG Default 5 mBAR 1 PSIA 6 KGcm2 2 kPa 7 in WC 3 mPa 8 in HG 4 BAR 9 mmHG Code 0 4 that selects the number of decimal position
33. by hanging the plate on the top two 2 hanger screws item A Replace the aluminum cover and tighten all three 3 slotted screws item A Position the battery cable in the white plastic spring clip item D Page 28 Mercor Mini AT Mini AT Operators Guide Backup Battery The Mini AT s backup battery is a triple AA alkaline battery pack 40 2444 that plugs into the main board at connector J26 see Figure 1 on page 8 In the event of a main power supply failure the backup battery will maintain audit trail information The Mini AT was setup according to your company s specifications and was shipped from the factory without any batteries connected The configuration information was programmed into E7PROM which can maintain its memory without any power applied to the instrument However power must be applied to the instrument before being placed into service To power the Mini AT 1 Plug the main battery cable into either J7 or J8 the white connectors on the lower left side of the main board See figures 10 and 11 on page 33 for power connections when an internal modem is installed 2 Plug the backup battery in to jumper J26 located to the left of the backup battery pack The backup battery pack 1 located near the center of the main board The connector is keyed to ensure that it can only be installed correctly It is important to plug in the main battery or alternative power source before plugging in the backup battery If the
34. control character during instrument sign on before issuing an error 21 timeout error This function is provided as a convenience for some 3rd party communication interfaces and under most situations should not be changed from the default setting Range 7 to 60 Default 7 The time in seconds the Mini AT waits for a valid sign on from the host computer after receiving the protocol control character ENQ before issuing an error 21 timeout error This function is provided as a convenience for some 3rd party communication interfaces and under most situations should not be changed from the default setting Range 7 to 60 Default 7 When activated this trigger will cause an audit trail entry to time stamp Hardware Resets A Hardware Reset occurs when the microprocessor receives an interrupt from the low voltage detector indicating the instrument s main power dropped below 4 3 volts This situation can occur while the instrument is asleep therefore would not produce a Low Battery Alarm or HELP shutdown Select 0 Inactive 1 Activated Default Mercor Mini AT Item No 174 175 176 177 183 184 Mini AT Operators Guide Item Name REPORT TRIGGER 10 REPORT TRIGGER 11 RBX ALARM EVENT PULSE REPETITION PREV DAY CORVOL PREV DAY UNCVOL Description When activated this trigger will cause an audit trail entry to time stamp Alarms Cleared either
35. has advantages over analog calibration techniques since the characterization coefficients are included in the recalculation and the transducer s zero offset item 017 414 is stored in memory for future reference There are several points that need to be understood when using the single point calibration method 1 Attempt a single point calibration only after the initial factory calibration or a subsequent 2 point calibration It is necessary to establish valid P Zero and P Span parameters before hand 2 Once the P Span value for a given transducer is determined this value will vary only slightly if at all during the functional life of the transducer Exceptions are if the transducer is damaged or significantly overpressured 3 Any and all pressure readings within the transducer s range may be viewed and adjusted The adjustments made with the Field Calibrator are not limited by the Excess Change value at item 024 4 When any live pressure reading is adjusted using the field calibrator the amount of change offset is applied to all readings within the transducer s pressure range 5 Iftwo live pressure readings preferably separated by at least 50 of the transducer range compare to a reference pressure the Mini AT s pressure system can be considered calibrated 6 If one or several live pressure checks do not compare to the reference pressure a Make certain the reference pressure is accurate b Calibrate the instrument s pressure
36. has stabilized When the absolute pressure has stabilized click the Average Pressure Now button when it becomes active to obtain a pressure sample NOTE The span reference pressure is equal to the sum of the dead weight tester pressure plus the atmospheric pressure obtained in step 9 above 14 If the average absolute pressure reading is not equal to the sum of the reference pressure plus the atmospheric pressure click the Change button when it becomes active Enter the pressure value for the span reference pressure see NOTE i n step 13 above As the computer screen updates the Mini AT will calculate the required span gain store this calculated value at Item Code 020 display the new values for items 017 414 and 020 417 display the previous values at items 018 415 and 021 418 before returning to a live pressure reading Obtain as many pressure samples as necessary until an acceptable span pressure reading 15 displayed 15 Compare the average absolute pressure reading to the span reference pressure If the average absolute pressure reading is equal to the sum of the applied pressure plus the atmospheric pressure the pressure calibration process is complete As a suggestion recheck the pressure zero reading and any number of pressure points within the transducer range or click Done to exit the calibration sequence Page 64 Mercor Mini AT Mini AT Operators Guide Single Point Pressure Calibration Defined A
37. laptop computer is not available If item 128 is configured for Disabled the pattern will never be displayed Select 0 Disabled 1 Enabled Default Code 0 3 to select the display of live gas pressure and or live temperature as part of the Meter Reader List If enabled the live parameter s will appear after the display ofthe last Mag List 1 but before any Mag List 2 items Both live gas pressure and temperature have a 30 minute time out instead of the usual 1 minute Default 3 Live PCor amp T Select 0 None 4 Live PLog 1 Live PCor 5 Live PCor amp PLog 2 Live T 6 Live T amp PLog 3 Live PCor amp T 7 Live PCor T amp PLog Item number ofthe first item displayed in the Meter Reader List unless there are active alarms Active alarms are always displayed prior to the selected mag list items Any Mini AT item may be entered as a mag list item Enter a 255 for this item if the Mag List 1 function is to be disabled See the section on using the Meter Reader List for more information Default 061 Display Test Mercor Mini AT Page 107 Item 131 132 133 134 135 136 Mini AT Operators Guide Item Name MAG LIST 1 ITEM 2 MAG LIST 1 ITEM 3 MAG LIST 1 ITEM 4 MAG LIST 1 ITEM 5 MAG LIST 1 ITEM 6 ITEM ENABLE Page 108 Description Item number ofthe second Mag List 1 item Any Mini AT item may be entered Entered a 255 at this item t
38. of each INTERVAL item 202 the instrument records either four or ten items into memory The default settings are Selectable Report Items 1 Item Code 258 225 Incremental Corrected Volume 2 Item Code 259 226 Incremental Uncorrected Volume 3 Item Code 260 206 Average Pressure 4 Item Code 261 207 Average Temperature Optional Report Items 1 Item Code 229 048 Battery Voltage 2 Item Code 230 000 Corrected Volume 3 Item Code 231 002 Uncorrected Volume 4 Item Code 232 008 PCor Gas Pressure 5 Item Code 233 026 Gas Temperature 6 Item Code 234 059 Battery Wake Cycles The Mini AT will store 140 days of hourly information for these ten items After 140 days the earliest information will begin to be overwritten by new information The Audit Trail can be down loaded using the Mini AT Link software or MasterLink32 The Audit trail items can be changed using Mini AT Link software and changing Item Codes 258 261 and 229 234 Any Mini AT item can be selected for the Audit Trail Assigning 255 to items 229 234 will configure the instrument RAM memory to the four item configuration Number of Days Available per download type Interval Selected Item 202 4 Item 10 Item 15 Minutes 30 Minutes 60 Minutes 24 Hours Table 8 Number of Days Available for Audit Trail Mercor Mini AT Page 59 Mini AT Operators Guide Instrument Calibration There are two methods to calibrate the gas pressure and gas temperature tr
39. reader list in the proper sequence ITEM ITEM DESCRIPTION 061 DISPLAY TEST 002 UNCORRECTED VOLUME 000 CORRECTED VOLUME GAS PRESSURE LIVE GAS TEMPERATURE LIVE 200 SITE ID 113 HIGH RESOLUTION CORVOL 013 BASE PRESSURE 014 ATMOSPHERIC PRESSURE 025 TRANSDUCER RANGE 044 PRESSURE CORRECTION FACTOR 043 TOTAL CORRECTION FACTOR 048 BATTERY VOLTAGE 031 CASE TEMPERATURE 203 TIME 204 DATE Page 48 Mercor Mini AT Mini AT Operators Guide METER READER LIST UNCORRECTED VOLUME CCF CORRECTED VO LUME MCF GAS PRESSURE GASTEMPERATURE SELECTED ITEMS Fig 14 Display Test and Default Window Label While the last meter reader item 15 displayed the next mag wand input will cause the LCD to go blank for 1 second whilethe instrument processes any stored uncorrected input pulses priorto returning tothe Corrector Mode Listed below is the configuration of item codes required to create the default Mini AT Meter Reader List Item Item Legend Selected Description Code Item 130 MagListlItem 1 061 Display Test 131 MagListlItem 2 002 Uncorrected Volume 132 MagListlItem 3 000 Corrected Volume 133 MagListlItem 4 255 End of List 134 MagListlItem 5 255 End of List 135 MagListlItem 6 255 End of List 129 LiveDisplayEnable LiveP amp T Live Pressure amp Temperature 075 MagList2Item 1 200 SiteID 076 Mag 1152 22 113 HighResolution CorVol 077 MagList2Item 3 013 Base Pressure 078 MagList2Item 4 014 Atmospheri
40. system using the Single Point Calibration method if an offset adjustment is adequate c Calibrate the instrument s pressure system using the 2 Point Calibration method if a span error must be corrected Mercor Mini AT Page 65 Mini AT Operators Guide Field Calibrator Front View with Door Ajar Calibrated Pressure Gauge Fig 20 Single Point Pressure Calibration Single Point Pressure Calibration Items Required Mini AT Mercor Mini Field Calibrator p n 20 8360 Pressure Source with fittings Calibrated pressure gauge or equivalent Wand p n 20 7286 Single Point Pressure Calibration Procedure Referto figure 20 during the single point calibration procedure Before startingthe procedure unlock and open the Mini AT s door Locate connector J2 near the top center ofthe main circuit board Connecta calibrated pressure gauge to the same pressure source that supplies pressure to the Mini AT s pressure transducer Note Ifthe Mini AT isa dual pressure model make sure to verify ifusing the PCor P1 or PLog P2 Transducer 1 Plugthe Mercor Mini Field Calibrator cable onto the main circuit board connector J2 Make certain all six pins are fully inserted into the black plastic cable connector The cable connector is angled to prevent the connector from being plugged in upside down Page 66 Mercor Mini AT Mini AT Operators Guide 2 Ifonlyasingle line pressure check is all that is to be attempted proceed to s
41. the laptop computer serial port The MasterLink 32 and Mini AT Link Software Help Screens contain information about operating MasterLink32 and Mini AT Link software Warning Connections to the RS 232 port are Mini AT permitted only in non hazardous locations Back View Pressure Connector Laptop Computer RS 232 Port Serial Port i e COM1 2 T O Cable P N 40 1629 Optional 2nd Pressure Port Plug for future expansion Fig 9 Serial Connection to Mini AT LCD Diagnostic Function Linking Beginning with firmware version 6 5121 the Mini AT will display additional characters on the LCD to let the user know the status of the serial link Examples are below Display Description VVVVVVVV Normal numeric display when not linked defaultis corrected volume total LLLLLLLL Instrumenthasawakened due to serial activity Lbbb 005 Instrumentis attempting to link bbb isthe Mini AT baud rate setting atitem 126 Useful for matching instrument and computer baud rates 005 indicates protocol character ENQ received when the baud rates ofthe Mini AT and computer match LLvvvvvv Instrumentis linked vvvvvv is the last six digits ofnormal display Page 30 Mercor Mini AT Mini AT Operators Guide Communicating to the Mini AT with a Modem The Mini AT has two serial ports Typically serial connection J6 will be used for local connections and TB2 will be used for modem connections The serial ports are mu
42. to figure 15 page 50 whichisa flowchart ofthe default meter reader list After the initial mag wand input the Mini s operating program determines if there any active alarms The presence of active alarms while inthe Corrector Mode is indicated by displaying all decimal points inthe corrected volume display Ifthere are active alarms all active alarm codes are displayed before the normal meter reader list items are displayed Note While in the alarm display routine all alarms will be cleared if the instrument is allowed to time out 60 seconds during the display of the E E E E E E E E and Item Code 128 is set to Yes Ifthe instrument receives a mag wand input during the E E E E E E E E display the alarms are not cleared and the sequence moves to the Display Test display The Display Test should always be configured as the first meter reader list item It provides a visual means of verifying that all LCD segments and decimal points are fully functional Ifthe Display Test does not appear as in figure 14 on page 49 the remaining item code values may not be accurate When the Mini AT receives a mag wand input during the Display Test the current value for Uncorrected Volume is displayed Each additional mag wand input will cause the next item code value to scroll onto the LCD The items assigned to the default meter reader list are comprised of Item Codes 130 135 129 and 75 83 Listed below is the default Mini AT meter
43. values such as gas pressure gas temperature battery voltage and any alarms that may be activated can be part of the meter reader list The meter reader cannot make any changes that will effect the configuration of the Mini AT The third level of access available is called Level 1 Access Mode This level of access requires an compatible computer MasterLink32 or Mini AT Link software an interface cable and the Level 1 Access Code Afterthe computer is connected and Level 1 Access has been gained the operator can perform field calibration checks and make adjustments if necessary Additionally clearing alarms performing certain diagnostic functions and changing the configuration ofauthorized items are possible To insure data integrity the serial communications protocol incorporates data error checking Access at the fourth level is reserved for the instrument technician and is referred to as Level 2 Access Mode Access to this level requires compatible computer Mini AT Link software an interface cable and the Level 2 Access Code After the computer is connected and Level 2 Access is gained the instrument technician can reconfigure Mini AT parameters Any and all item code values may be changed including Level 1 Level 2 and the Instrument Access Codes The Authorization Table may also be modified which will control what item values may be changed during Level 1 Access To insure data integrity the serial communications pro
44. weighted meaning the only PCor pressure measurements included are obtained at the time of uncorrected volume inputs This relates exactly to the correction factors and is the equivalent of a pressure trace on a meter driven volume chart The average pressure is a running average so the value displayed is the most recent value calculated Default 0 00 Calculated average temperature for the time interval selected at item 202 The average value is flow weighted meaning the only temperature measurements included are obtained at the time of uncorrected volume inputs This relates exactly to the correction factors and is the equivalent of a temperature trace on a meter driven volume chart The average temperature is a running average so the value displayed is the most recent value calculated Default 0 00 Mercor Mini AT Page 119 Mini AT Operators Guide Item No Item Name 208 AVG FLOW RATE 209 INST FLOW RATE 210 PEAK FLOW RATE 21 HOUR CORVOL 212 PEAK HR END TIME 213 PEAK HOUR DATE 214 PCORINTVL HIP Page 120 Description Calculated average rate of flow for Corrected Volume 000 for the time interval selected at item 202 expressed in CorVol units per hour Example Ifthe COR VOL UN CODE item 090 is 7 CCF and 211 704 cubic feet of corrected volume were measured during the last log interval of 24 hours the number displayed will be 88 21 Default 0 00 The current instantaneous rate of f
45. 00 254 MAXDAY DATE The date the MAX DAY CORVOL 253 occurred Format Determined by item 262 Default 01 01 98 256 PCORDAILY AVGPRESS daily average of PCor Gas Pressure item 008 which will be reset to zero at the start of each Gas Day Default 0 00 257 DAILY AVG TEMP The daily average Gas Temperature 026 which will be reset to zero at the start of each Gas Day Default 0 00 Mercor Mini AT Page 125 Item No 258 259 260 261 262 268 Mini AT Operators Guide Item Name SLTBLE REP ITEM 1 SLTBLE REP ITEM 2 SLTBLE REP ITEM 3 SLTBLE REP ITEM 4 DATEFORMAT AT TIMELOG TIMESTAMP JUMPER SETTINGS Page 126 Description The first of four user selectable Audit Trail Report Items that can be configured for Audit Trail memory To use these four items insertthe desired item code number into any ofthe report locations 258 261 The value 255 at any of theseReport Items will cause that position to be blank The Audit Trail logger can be configured to record four or ten item values in each audittrail record See Item Codes 229 234 for further information Default 225 Incrv CorVol See above Default 226 Incrv UnVol See above Default 206 Avg PCor Gas Pressure See above Default 207 Avg Temperature Code 0 2 to select the format in which the Date is entered and displayed at item 204 The format for all date related items 213 244 247 etc will als
46. 00 Mercor Mini AT Page 127 Item 281 282 283 284 285 286 287 288 289 290 29 292 Mini AT Operators Guide Item Name MAX DIAL RATE MAX DIAL TIME MAX DIAL DATE MAX DIAL PRESS PCOR MAX PRESS PCOR MAX PRESS TIME PCOR MAX PRESS DATE MAX P FLOW RATE PCOR MIN PRESS PCOR MIN PRESS TIME PCOR MIN PRESS DATE MIN FLOW RATE Page 128 Description The highest value of Inst Dial Rate item 218 since the last manual reset Default 0 The time when Max Dial Rate item 281 occurred Default 00 00 00 Format HH MM SS The date when Max Dial Rate item 281 occurred Date Format Determined by item 262 Default 01 01 98 The PCor Gas Pressure item 008 when the Max Dial Rate item 281 occurred Default 0 00 The highest value of PCor Gas Pressure item 008 since the last manual reset Default 0 00 The time when PCor Max Press item 285 occurred Default 00 00 00 Format HH MM SS The date when PCor Max Press item 285 occurred Date Format Determined by item 262 Default 01 01 98 The Inst Flow Rate item 209 when the PCor Max Press item 285 occurred Default 0 00 The lowest value of PCor Gas Pressure item 008 since the last manual reset Default 99999 99 The time when PCor Min Press item 289 occurred Default 00 00 00 Format HH MM SS The date when PCor Min Press item 289 occurred Format Determined by item 262 Default 01
47. 00 m3 4 1000 CF Mercor Mini AT Item No 099 100 101 102 Mini AT Operators Guide Item Name BATTERY LOW BATT CYCLES ALRM BKUP BATTERY LOW INDEX SW 1 FAULT Description This item 099 indicates if a low voltage alarm for the main battery was generated During a wake cycle if the measurement for item 048 BATTERY VOLTAGE is a value less than the value at item 049 BATTERY LOLIM V an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 099 00000000 at item 099 indicates there is no Low Battery Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled Default 00000000 This item 100 indicates if a high wake cycle alarm for the main battery was generated During a wake cycle if the calculated value for item 059 BATTERY WAKE UP CYCLES is a value greater than the value at item 060 BATT CYCLES LIM an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 100 00000000 at item 100 indicates there is no Battery Cycles Alarm The alarm indicators will remain active until manually cleared by software Default 00000000 This item 101 indicates if a low voltage alarm for the backup battery was generated During a wake cycle if the measurement for item 051 MEMORY BATTERY VOLTAGE is a value less than the value at item 052 MEM BATT LOVOLT LI
48. 000 0 1 1 00000 0 10000 0 01000 0 00100 0 00010 0 28317 0 02831 CuFtx10 10 00000 1 00000 0 10000 0 01000 0 00100 2 83170 0 28317 0 02831 CuFt x 100 CCF 10 00000 1 00000 0 10000 0 01000 28 31700 2 83170 0 28317 0 02831 CuFt x 1 000 MCF 10 00000 1 00000 0 10000 28 31700 2 83170 0 28317 0 02831 CuFt x 10 000 10 00000 1 00000 28 31700 2 83170 0 28317 m3 x 0 1 3 53140 0 35314 0 03531 1 00000 0 10000 0 01000 0 00100 m3X1 0 135 31400 3 53140 0 35314 0 03531 10 00000 1 00000 0 10000 0 01000 m3 x 10 35 31400 3 53140 0 35314 0 03531 10 00000 1 00000 0 10000 m3 x 100 35 31400 3 53140 0 35314 10 00000 1 00000 35 31400 3 53140 10 00000 1 00000 Table 7 Form C Pulse Output Scaling Page 44 Mercor Mini AT Mini AT Operators Guide Mini AT Operating Modes While in service the Mini AT is always in one of four operating modes The operation ofthe instrument in each state is well defined and suited to a particular purpose The four states are referred to as Operating Modes and Corrector Mode Meter Reader Mode Level 1 Access Mode Level 2 Access Mode In all four Modes the Mini AT may be receiving and processing uncorrected volume pressure and the temperature input from the meter The Level 2 Access Mode was originally intended to be used in the meter or instrument shop however it is common practice for field use
49. 000000 306 COMP COEFF 6 Default 30 00000 307 PCORCOMP COEFF 7 Default 0 000000 These are Default 308 PCOR COMP COEFF 8 Default 0 000000 values only 309 PCOR COMP COEFF 9 Default 0 000000 310 PCORCOMP COEFF 10 Default 30 00000 311 COEFF 11 Default 0 000000 312 COEFF 12 Default 0 000000 313 COEFF 13 Default 0 000000 314 COEFF 14 Default 30 00000 315 PCORCOMP COEFF 15 Default 0 000000 316 COEFF 16 Default 0 000000 317 COEFF 17 Default 0 000000 318 PCORCOMP COEFF 18 Default 30 00000 319 PCORCOMP COEFF 19 Default 0 000000 320 PCORCOMP COEFF20 Default 0 000000 321 COEFF21 Default 0 000000 322 COEFF22 Default 30 00000 323 COEFF23 Default 0 000000 See information 324 COEFF 24 Default 0 000000 below for more 325 PCORCOMP COEFF25 Default 0 000000 details 326 PCORCOMP COEFF 26 Default 30 00000 327 PCORCOMP COEFF27 Default 0 000000 328 PCORCOMP COEFF 28 Default 0 000000 329 COEFF29 Default 0 000000 330 PCORCOMP COEFF30 Default 30 00000 331 COEFF31 Default 0 000000 332 COEFF32 Default 0 000000 Item codes 301 thru 332 are the 32 PCor pressure transducer compensation coefficients These values determine the pressure response over the entire ope
50. 01 98 The Inst Flow Rate item 209 when the PCor Min Press item 289 occurred Default 0 00 Mercor Mini AT Item 293 294 295 296 297 298 299 300 Mini AT Operators Guide Item Name MAX GAS TEMP MAX TEMP TIME MAX TEMP DATE MAX T FLOW RATE MIN GAS TEMP MIN TEMP TIME MIN TEMP DATE MIN T FLOW RATE Description The highest value of Gas Temperature item 026 since the last manual reset Default 40 00 The time when the Max Gas Temp item 293 occurred Default 00 00 00 Format HH MM SS The date when the Max Gas Temp item 293 occurred Date Format Determined by item 262 Default 01 01 98 The Inst Flow Rate item 209 when the Max Gas Temp item 293 occurred Default 0 00 The lowest value of Gas Temperature item 026 since the last manual reset Default 99999 99 The time when the Min Gas Temp item 297 occurred Default 00 00 00 Format HH MM SS The date when the Min Gas Temp item 297 occurred Date Format Determined by item 262 Default 01 01 98 The Inst Flow Rate item 209 when the Min Gas Temp item 297 occurred Default 0 00 Mercor Mini AT Page 129 Mini AT Operators Guide Item No Item Name Description 301 COEFF 1 Default 0 000000 302 PCORCOMP COEFF 2 Default 30 00000 303 COEFF 3 Default 0 000000 304 PCORCOMP COEFF 4 Default 0 000000 305 PCORCOMP COEFF 5 Default 0
51. 077 Mini AT Operators Guide Item Name PULSER C ALARM ALARM ITEM ALARM 2 ITEM ALARM 3 ITEM MAG LIST2ITM 1 MAG LIST2ITM2 MAG LIST 2 ITM 3 Description If the value at item 007 Pulser C exceeds the Pulser C Limit item 071 an alarm is initiated The LCD will display dots while in the Corrector Mode and item 071 will display 11111111 if view by the Meter Reader Mode or software 00000000 is displayed if item 071 has no alarm Default 00000000 Item number for the first of three user selectable optional alarms Intended choices are 000 unassigned 105 Pressure Out of Range 106 Temperature Out of Range Default 000 Item number for the second of three user selectable optional alarms Intended choices are 000 unassigned 105 Pressure Out of Range 106 Temperature Out of Range Default 000 Item number for the third of three user selectable optional alarms Intended choices are 000 unassigned 105 Pressure Out of Range 106 Temperature Out of Range Default 000 Item number ofthe first item displayed in MAG LIST 22 The display of this selection follows the display of LIVE Parameters if enabled at item 129 or the last MAG LIST 1 ITEM if enabled items 130 135 If neither LIVE Parameters nor MAG LIST 1 items are enabled the item programmed into item 075 will be the first Mag Read Item to be displayed in the Meter Reader List Any Mini AT item number may
52. 2 Item 7 082 Mag List 2 Item 8 083 Mag List 2 Item 9 084 Mag List 2 Item 10 085 Mag List 2 Item 112 086 Mag List 2 Item 12 129 Live Display Enable 130 Mag List 1 Item 1 131 Mag List 1 Item 2 7 132 Mag List 1 Item 3 7 133 Mag List 1 Item 4 134 List 1 Item 5 135 List 1 Item 6 Selected Item 009 047 048 031 255 255 255 255 255 255 255 255 Live PCor amp T 061 200 000 002 252 255 Description Gas Pressure Maximum Unsquared Super Battery Voltage Case Temperature End Of List End Of List End Of List End Of List End Of List End Of List End Of List End Of List Live PCor Pressure amp Temperature Display Test Site ID Corrected Volume Uncorrected Volume End Of List End Of List Note Remember that all Mag List 1 and Mag List 2 items havea 1 minute time out Both live parameters have a 10 minute time out Page 54 Mercor Mini AT Mini AT Operators Guide CORRECTOR MODE o TEA LARMS DISPLAY ASOUTLINED AG WAND INFIGURE 12 gt 8 8 8 8 8 8 8 8 MAG WAND 1 MINUTE TIME OUT 1 MINUTE TIME OUT SITE ID 212345678 CORRECTED VOLUME 3500082417 1 MINUTE TIME OUT MAG WAND UNCORRECTED _______ a VOLUME 00593296 MAG WAND LIVE GAS PRESSURE MAG WAND LIVE GAS DE TEMPERATURE MAG WAND GAS PRESSURE MAXIMUM 7 57 33 MAG WAND 10 MINUTE 10 MINUTE 1 MINU
53. 22 is initialized re zeroed at the beginning of each new log interval Default 099999 99 The highest value of PLog Gas Pressure since the last manual reset Default 0 00 The time when PLog MAX PRESS item 426 occurred Default 00 00 00 Format HH MM SS The date when PLog MAX PRESS item 426 occurred Default 01 01 98 The lowest value of PLog Gas Pressure since the last manual reset Default 99999 99 The time when PLog MIN PRESS item 429 occurred Default 00 00 00 Format HH MM SS The date when PLog MIN PRESS item 429 occurred Default 01 01 98 Mercor Mini AT Page 135 Mini AT Operators Guide Item No Item Name 451 PLOG PRESSURE HIGH 452 PLOGPRESSURELOW 455 PLOG PRESS HILIM 456 PLOG PRESS LOLIM 459 PLOG PRESS DEADBAND Page 136 Description This item indicates if a PLog high pressure alarm was generated During a PLog sample Item 401 if the measurement for item 420 PLog GAS PRESSURE is greater than the value entered at item 455 PLog PRESS HILIM an alarm is initiated and is indicated by placing dots on the LCD and 111111117 at item 451 00000000 at item 451 indicates there is PLog pressure high alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX is enabled The PLog Pressure High Limit value item 455 is user selectable and is normally set somewhere between 50 and 100 of transducer range Defau
54. 3W 5 e HDL23NNDO 3592 v VIA NIVW NO 19 1 0968 02 AOLVAEINVI dq 313 Tt LNAWNALSNI SHL 71935 520 OL 38 WVIWHS SNV3W OT 3Hl DI C3123NNDO2 38 1SNW 37815509 SV S wWNIW3S31 3Hl OL 5015 SV LSNW LNAWdINOS 3Hi 5 SQMIJIHS 6 WHO AND 5531 38 GN D3O Haliev3 GNDDeO e3IsSeVS WOSd 39NVISIS3S 28 SATOA 062 3L1V33N39 3SN LUN TIVHS AHL 01 GSLOENNOD 2 NDILVTIVISNI 50 4 VSI ISNV ANY 02 Vd3N ISNV O3N 39NVGSDO2OV NI 7171915 1405 S3LON IVNVO NI NOILVYVIVLISNI 50 3 T 1494 71991519373 NVITGVNV2 32NV 3D2OV NI 711915 1333 006 SI 5 9 aD S3dAL OL HJION3 317493 W WIXVW C4G Ot 5 1334 021 SI HL NAI 378V2 WNWIXYW 205 8 6 59 HONS 3 8NIA GI3G 3IHS JSN 1334 002 SI Se3lIHBHVHS v S3dAL OL HION3 3149 XYW 39anns 2 6 M3IMMVS P JALIN SNIGYNL SZ221 0v AlddNS 5981 07 S6ST OF 6vvl Ov ZvvTI O0v 2594 AN3l1V8 HLIM AGNO XIMBA X3 906 ZH H
55. 9 Mercor Mini AT Page 121 Item No 222 223 224 225 226 Mini AT Operators Guide Item Name DAILY CORVOL ALM DAILY CORVOL DAILY UNCVOL INCREMNTL CORVOL INCREMNTLUNCVOL Page 122 Description During a wake cycle if the computed value for item 223 DAILY CORVOL is greater than the value at item 221 DAILY CORVOL LIMIT an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 222 00000000 at item 222 indicates there is no Daily CorVol Alarm The alarm and alarm indicators are automatically cleared at the beginning of each Gas Day regardless if RBX item 165 15 enabled or not Default 00000000 Same as CORVOL item 000 but is initialized re zeroed at the START TIME item 205 of each Gas Day If the instrument is accessed this item will display the current value for that point in time Default 00000000 Same as UNCVOL item 002 but is initialized re zeroed at the START TIME item 205 of each Gas Day If the instrument is accessed this item will display the current value for that point in time Default 00000000 Same as CORVOL item 000 but is initialized re zeroed at the beginning of every TIME triggered wake up item 202 Ifthe instrument is accessed this item will display the current value for that point in time Default 00000000 Same as UNCVOL item 002 but is initialized re zeroed at the beginning of every TIME triggered wak
56. Default 008 Gas Pressure See above Default 026 GasTemperature See above Default 059 Battery Wake Cycles Audit Trail Time Intervals TIME Daily Nominated Volume Reached VOLUME Alarm Activations ALARM Serial Access SERIAL Meter Reader Mag Wand Access READ OBSOLETE OBSOLETE Changes to item values CHANGE Mercor Mini AT Page 123 Item No Mini AT Operators Guide Item Name Description For items 235 thru 239 and 242 code 0 1 to activate or 243 244 245 246 MO PK HR CORVOL MO PK HR DATE MO PK HR TIME MO PK DAY CORVOL Page 124 deactivate the above listed audit trail Report Triggers If activated an audit trail record will appear in the audit trail log at the occurrence of each particular type of trigger The entry appears as a time stamp record consisting of the following fields in a left to right order If the unit is configured for just four audit trail items Optional Report Items 1 6 are omitted from the audit trail record Column Field 1 DATE 204 2 203 3 SELECTABLE REPORT ITEM 1 258 4 SELECTABLE REPORT ITEM 22 259 5 SELECTABLE REPORT ITEM 23 260 6 SELECTABLE REPORT ITEM 4 261 7 8 OPTIONAL REPORT ITEM 71 229 OPTIONAL REPORT ITEM 2 230 9 OPTIONAL REPORT ITEM 73 231 10 OPTIONAL REPORT ITEM 74 232 11 OPTIONAL REPORT ITEM 5 233 12 OPTIONAL REPORT ITEM 76 234 13 REPORT TRIGGER items 235 239 242
57. E 121 TEMP CAL DATE 122 FIRMWARE 123 AUDIT TRAIL ENABLE 124 REVS PER WAKE UP 125 PULSER POWER FACTOR Page 106 Description Date of the most recent change to PCor CAL ZERO Item 017 The date is automatically inserted into item 120 when exiting the PCor CAL ZERO calibration function Default 01 01 98 Date of the most recent change to TCAL ZERO Item 035 The date is automatically inserted into item 121 when exiting the TCAL ZERO calibration function Default 01 01 98 This item displays the instrument s operating firmware version number The version number reported is automatically inserted when a firmware file is uploaded into FLASH memory The Flash Access Security Jumper must be installed at JB24 pins 5 amp 6 prior to attempting to upload a firmware file Obsolete item This parameter N is used to determine the number of meter revolutions required before a full wake up is initiated and new analog measurements are taken All other meter revolutions will result in intermediate wake ups This function is a carry over from the ECAT Mini as a power conservation feature on fast meters having fairly constant pressures and temperatures The significance of this feature in the Mini AT is less since the power drain on the battery is less Range 0 to 15 Default 1 This parameter provide a method of assigning a power consumption factor to output pulses The factor selected by the user permits accurately accoun
58. ELOW ALARM DEFAULTDISPLAY Description Parameter to disable enable zero flow rate detection as well as apply a scaling factor to the calculated expectation time period A value of 0 disables Zero Flow Detection A value greater than zero will enable Zero Flow Detection Range 0 to 60 Default 2 This item indicates if a Low Flow Rate alarm was generated If the value calculated at item 209 was less than the value entered at item 462 an alarm 15 initiated and 1s indicated by placing dots on the LCD and 11111111 at item 461 00000000 at item 461 indicates there is no Low Flow Alarm The alarm indicators will remain active until manually cleared or automatically when RBX is enabled This alarm can be disabled by setting the value at item 462 to 0 0 Default 00000000 Parameter used to select which item will be displayed on the LCD when the instrumentis in corrector mode Any item may beselected buttraditionally corrected volume is displayed MODEM AT ENABLE MODEM INIT STRING MODEM DIAL STRING ALARM CALL IN MODEMHANG UP MDM RETRY INTVLA MDM RETRY INTVL B MDM RETRY COUNT A Default 000 Corrected Volume Selection to determine the type of call in initiated by the instrument Select 0 Call in via Alarm Pulse Default 1 Call in via AT commands Character string used to initialize instrument modem at the beginning of call in Default amp f Character string used to initiate dialing
59. END TIME HOUR DATE MAX HOUR PRESS Description Code 0 7 to select the communication s baud rate for the modem at the Mini AT wired into terminal strip TB2 A communication error may result if the baud rate at item 272 does not match the baud rate of the connected modem Baud rate jumpers JP4 and JP5 on the Mercury Modem board should be set to match the baud rate at item 272 The jumpers can be set for 1200 2400 and 9600 baud avoid the 19 2kbaud setting A separate item Item code 126 provides setting the baud rate for the local serial connection at the RS 232 port Select 0 9600 Default 4 600 1 4800 5 300 2 2400 6 19200 3 1200 7 38400 The highest value of Inst Flow Rate item 209 since the last manual reset Default 0 00 The time when Max Flow Rate item 273 occurred Default 00 00 00 Format HH MM SS The date when Max Flow Rate item 273 occurred Date Format Determined by item 262 Default 01 01 98 The PCor Gas Pressure item 008 when Max Flow Rate item 273 occurred Default 0 00 The highest value of Peak Hour Corvol item 211 since the last manual reset Default 00000000 Ending hour when Max Hour Corvol item 277 occurred Default 00 00 00 Format HH MM SS The date for Max Hour End Time 278 occurred Date Format Determined by item 262 Default 01 01 98 The PCor Gas Pressure item 008 when the Max Hour Corvol item 277 occurred Default 0
60. ESS TCAL CHNG TOTAL COR FACTOR PRESS COR FACTOR TEMP COR FACTOR Description The most recent span value for the temperature transducer obtained during a T Span calibration The value is normally very close to 1 0000 and is recalculated on each Temperature Span Calibration Default 1 0000 The previous value of item 038 updated on each Temperature Span Calibration Default 1 0000 The previous value of item 039 updated on each Temperature Span Calibration Default 1 0000 The configurable spread or difference expressed in percent of full scale of the temperature range i e 40 00 to 170 00 or 210 degrees required between TZERO and TCAL calibration points Default 10 0000 The configurable maximum allowable change expressed in percent of full scale of temperature range to TZERO and TCAL calibration points Default 2 0000 Total correction factor calculated at the most recent wake up and used as a multiplier to convert uncorrected volume to corrected volume It is the product of the values at Items 044 045 046 and 047 i e values at 44 x 45 x 46 x 47 Default 1 0000 Pressure correction factor calculated at the most recent wake up using Boyle s Law for values at items 008 013 and 014 when item 109 1 set for LIVE Items 044 and 008 may be fixed factored to any reasonable value by the user if item 109 is set for FIXED Default 1 0000 Temperature correction factor calculated at th
61. Gas Day old at the time the instrument was accessed This information is updated with the value from item 190 at the beginning of every new gas day Note The gas day begins at the time entered at item 205 Default 00000000 Same as item 210 Peak Flow Rate except this value is the peak flow rate for the current Gas Day which is zeroed at the time entered at item 205 Therefore the value displayed during instrument access is the peak flow rate up to that point in time during the current gas day Default 00000000 The ending hour time the Daily Peak Flow Rate 192 occurred during the current gas day Default 00 00 00 Yesterday s Daily Peak Flow Rate i e the daily peak flow rate that is one Gas Day old at the time the instrument was accessed This information is updated with the value from item 192 at the beginning of every new gas day Note The gas day begins at the time entered at item 205 Default 00000000 The ending hour time the Previous Daily Peak Flow Rate 194 occurred during the previous gas day Default 00 00 00 An identification number inserted into the Event Log to identify the person that caused the change s to the instrument s configuration The default value is 0 but may be voluntarily changed to any number between 0 amp 99 inclusive when prompted during instrument access Default 0 Mercor Mini AT Page 117 Item 197 198 199 200 201 202 Mini AT Op
62. IASNVHL T dI 3LOW3H ZLZ OLZ 1300 0492 310N 33S 3Jl1ON 335 Sasnad 11 Tal 961 0 lt 11 HOLIMS gt 3Sfid lt lt ES 22 3AQODA 409 E 19 lt NOILdo gt a piv Tv NN Sua Ler is EI 199 as 2 LY INIW 9 1313 3IV4YSLNI 291 Joins 3 CANO LV INIIAD SAL See2 0v Ex axy 1691 0r 09 8 0z or adavog NIV d ONO 1 55 10 NOILVOOT SNOCYVZV ini AT Mercor M Page 146 AT Operators Guide Inl M 0074 1801 Addy 6 12 90 YSO 11 15 C4G 9 5 1334 02 HONS JAIM C4I9 1334 002 SI GZ241 0v A ddns S6ST OF 6vvi 0v Ly ASQIIVE HLIM J HONS lt NIW gt SWHD S AV 13a CAOT O00 OST EET 20 10N gt gt WHO 06 Saalaava S 31995 39N38343328 SNOILVOO1 SNOGHVZVH ININ YOOMSW SINSANAYLSNI NI VGVNVO NI NOILYVIVISNI X04 T Lavd 792141227113 NVIGVNVO HLIM 32ONVGI3SDIO2OV NI 711915 9 C426GT 1333 005 SI S33INBHVG8 ao 2 S3dAL OL HAIO5N3 31492 WNWIXYNW 5 SI HI5N31 38V23
63. ID Numbers at items 200 and 201 Default 00000000 User selected time periods that determines how often a time stamp record 15 placed in audit trail memory Select 15 minutes 30 minutes 60 minutes Default 24 hours Mercor Mini AT Mini AT Operators Guide Item No Item Name 203 TIME 204 DATE 205 START TIME 206 PCORAVG PRESS 207 AVG TEMP Description Real Time Clock that displays hours minutes and seconds in 24 hour military time 1 14 30 02 would be 2 seconds past 2 30 PM Default 12 00 00 A numeric field indicating either Month Day Year MM DD YY Day Month Year DD MM YY or Year Month Day YY MM DD depending on the Date Format selection at item 262 The Date automatically tracks the days in the month including leap year Leading zeros are required where applicable This Date and Time item 203 is used to time stamp records in Audit Trail Event Logger and Alarm Logger memory Note The date entered at item 204 is also inserted at Item 199 Default 01 01 98 Format MM DD YY User selectable time to begin the start of the Gas Day which by definition of other items is the time of day when daily computations are re zeroed to begin the next day s computations Note The time entered should contain zeros for minutes and zeros for seconds Default 08 00 00 Calculated PCor average pressure for the time interval selected at item 202 The average value is flow
64. JANLYJJJWIL WNWIXYW S8TE6 SV 3SN saziva S3dAL OL HLION3 318V2 eosi ov vl 0v S 2vVd 3 Dd A ddns 2 X3 906 ZHA 3 SY AOT 0 SH313WVavd DNIAVH ISNNVHO 3 1115 311935 950 0526 1626 5218415 7 915 egex3 223 379 1 gt 1x3 LL3M SHONA S 3 IDNIS WHO 29 A9 8 07Z 0S1 980 1 10683 50 0 061 980 10 10068 IHVLS X3 IDNIS WHO OS AO01 01 8 5 gt WHO 001 AS1 GIZ8 71 AWN WHO OI AS Z 8648 5 38V v ON NAHM gt 339NIS 1006 THVLS 2 HLIM 3SN 1 65 PCTOL T 1 I3AD3dgdw S3LON AIC lt 6 7191435 46 lt 1 4 86 20 01 421 3SN LON TIVHS amp JHL G3193NNDO LNAWdINOS vs33HdlS3d Z GQNNOYS Hliuv3 HILIMS X3INI azaay I N2 COL Vdd3N ISNV2O SSN JHL HLIM 3ONV eLD2OV NI 7171915 to 01 I 1 N3MOd vNOlLdO annoys Hia eo ee 3anad us 62 dW31 dE ee NO 2 3d osx U
65. MIT an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 101 00000000 at item 101 indicates there is no Low Mem Battery Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled Default 00000000 This item 102 indicates if an alarm for index switch 1 was generated If index switch 1 fails to provide an input meter pulse within four meter revolutions an alarm is initiated and is indicated by placing dots on the LCDand 11111111 at item 101 00000000 at item 101indicates there is no Switch 1 Alarm The alarm indicators will remain active until manually cleared by software Default 00000000 Mercor Mini AT Page 101 Item No 103 104 105 Mini AT Operators Guide Item Name INDEX SWZ2 FAULT A DFAULT PRESS OUT RANGE Page 102 Description This item 103 indicates if an alarm for index switch 2 was generated If index switch 2 fails to provide an input meter pulse within four meter revolutions an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 102 00000000 at item 102 indicates there is no Switch 2 Alarm The alarm indicators will remain active until manually cleared by software Default 00000000 This item 104 indicates if an alarm for A D Converter was generated If the microprocessor detects an A D fault Analog to Dig
66. Mini AT s RS 232 port 3 Start Mini AT Link software or MasterLink32 on the computer 4 Enter the access code for Level 1 or Level 2 when requested The default Level 1 Access Code is 11111 the default Level 2 Access Code is 22222 5 Select Calibrate from the main menu 6 Select PCor Pressure Calibration or PLog Pressure Calibration from the sub menu Note In MasterLink32 first select Pressure then a box will appear for selecting PCor or PLog 7 Ifacommunications link has not yet been established the software will attempt to link to the Mini AT Ifthe access code of the Mini AT is not the default of 33333 a box will appear requesting the user to input the Instrument Access Code Enter the access code when this box appears Mercor Mini AT Page 61 8 Mini AT Operators Guide With zero pressure applied to the selected pressure transducer perform the Pressure Zero Calibration The pressure displayed in green on the computer s screenis alivereading This permits the user to determine ifthe pressure has stabilized so that a sample may be obtained Click the Average Pressure Now button when it becomes active text changes from gray to black to 9 obtain a sample of the applied pressure When the software displays the Average Pressure the value should be changed to match the pressure reference by clicking the Change button when it becomes active Enter the pressure value for the zero refer
67. Operator s Guide for Mercury Instruments Inc Mercor Mini AT Electronic Volume Corrector Revision 3 00 May 2004 COPYRIGHT NOTICE Operators Guide for Mercury Instruments Inc Mercor Mini AT Electronic Volume Corrector COPYRIGHT 1998 2004 by Mercury Instruments Inc Rights Reserved Table of Contents Introdue lon au dete 2 jer eure RR E 6 Connectors Jumpers location terree ende NU tu esas 8 RI NC MENSIS UN 10 Correction Factors to Metered Volume ease Y MR RE I aan eaten de TI Seda 13 theMit AT TOU CERT 15 Receiving the T isa re ee Ee NR MIU es 19 Installattom Standard qe datei uet ae EET 20 Installation without an Instrument Drive s Ho bas da E in etant bats 23 Packs Inst llingor Changing eub cu al ub TUO DUUM UNUS 28 Serial COHUSCIOE ei tle his ados ette Aa NOR ona etes te Mite 30 LCD Diagnostic Linking rod omn md di eite e Ma do etate 30 Modem Communicating with the Mini AT eene nnt enne nne tnmen 3l S 36 Pulse Outputs Ala mS o c easi I a Et RAN ua Ee MP Ee p ev sese 37 Pulse Outputs
68. PEAK DIAL RATE NOMINATED CORVOL DAILY CORVOL LIMIT Description Lowest PCor Gas Pressure item 008 measured during the Time interval selected at item 202 The value at item 214 is initialized re zeroed at the beginning of each new log interval Default 099999 99 Highest Gas Temperature item 026 measured during the Time interval selected at item 202 The value at item 214 is initialized re zeroed at the beginning of each new log interval Default 40 00 Lowest Gas Temperature item 026 measured during the Time interval selected at item 202 The value at item 214 is initialized re zeroed at the beginning of each new log interval Default 099999 99 Instantaneous meter flow rate derived from the UncVol meter pulses and expressed in Cubic Feet per hour or Cubic Meters per hour depending on the selection at item 098 Similar to INST FLOW RATE item 209 including the 1 minute time limitation Default 0 00 Highest value of item 218 during the current log interval Similar to PEAK FLOW RATE item 210 Default 0 00 The nominated daily contract volume with the value entered using the selected CorVol units item 090 When the value for DAILY CORVOL item 223 reaches the NOMINATED CORVOL item 220 a time stamp record is placed in audit trail memory if item 236 is enabled Default 99999999 High limit for daily contract volume initiates an alarm item 222 if exceeded Default 9999999
69. Parameter Display Item code 129 4 Mag List 2 Item codes 075 086 Except for the Alarm Codes each subsection listed above is configurable Refer to the descriptions belowand the flowchart in figure 15 on page 50 for configuration details and the sequence of events that occur during anon default meter reader list Mag List 1 Mag List 1 consists of six item codes 130 135 which define what items will appear in section 2 of the meter reader list Normally Display Test Uncorrected Volume and Corrected Volumes are the item assigned to Mag List 1 However any instrument item code can be placed into Mag List 1 If less than six items are required place the value 255 into the item code location after the last desired Mag List 1 item When the Mag List 1 item values are displayed all eight digits on the LCD are used unless the volume items are configured for fewer digits using Item Codes 096 and 097 Example 1 Suppose Display Test Corrected Volume Uncorrected Volume Gas Pressure and Gas Temperature are the only items desired for Mag List 1 Since only five items are listed the Mag List 1 configuration would appear as follows Item Item Legend Selected Item Description Code Item 130 MagListlItem1 061 Display Test 131 Mag List 1 2 000 Corrected Volume 132 Mag List 1 Item3 002 Uncorrected Volume 133 Mag List 1 Item 4 008 Gas Pressure not Live 134 Mag List 1 Item 5 026 Gas Temperature not Live 135 Mag List 1 It
70. Q OtZLL OF ezovd azs AH Lddv VSO MASLIN 3NIGHL NOILVTTVISNI ININ OO3IN 5 AJOOM3N adlaavad 2 M aalaava amp af Q4OLO3NNOO 3SVO WHO L ONDOHO Hlava GNO 3OIA30 SNOLLVOINDINWOOS SLOWSY luHVd H3HSFVS SI NOIIV2O1 SNOGYVZVH NON AINO 1V ININ Z991 0vt SZC i Ov vZCi Obv 8SiCci OP 51 4 ZAM WNOlLdO INIA OON CATING LV INIWO 281 0r 9n ayoa UNOX aayos H vias 0 dnowo 71 AG 519 NOIIVOO1 SnOQNVZVH Mercor Page 150 Mini AT Operators Guide INDEX Alarms Audit Trail Battery Packs Installing or Changing To install batteries in Alkaline Receptacle Pack Install orreplace disposable battery pack Backup Battery To power the Mini AT Calibration 2 Point Pressure Calibration Defined 2 Point Pressure Calibration Defined Gauge Transducers 2 Point Pressure Calibration Procedure Gauge Transducers 2 Point Pressure Calibration Defined Absolute Transducers 2 Point Pressure Calibration Procedure Absolute Transducers Single Point Pressure Calibration Defined Single Point Pressure Calibration Procedure 2 Point Temperature Calibration Defined 2 Point Temperature Calibration Procedure Si
71. S OPERATING perform a SHUTDOWN first To install batteries in Alkaline Receptacle Pack e After placing the instrument in Shutdown or plugging a second battery pack into J7 or J8 loosen the three screws that secure the Alkaline Receptacle pack to the inside of instrument s door item A in figure 7 on page 27 Unplug the battery cable from the main board see figure 8 on page 27 amp 1 on page 8 Remove the battery pack assembly from the instrument by sliding the pack up and off the door Loosen the two slotted screws at both ends of the battery pack After disengaging both clips remove the aluminum cover from the battery assembly Replace or install 6 D cell alkaline batteries making sure to orient each cell for proper polarity Reinstall the aluminum cover and tighten the two slotted screws Hang the battery assembly and tighten the three screws Warning To reduce the risk of ignition of a flammable atmosphere batteries must only be changed in an area known to be nonflammable Cover must be secured before installing in instruments Install or replace disposable battery pack Refer to figures 7 and 8 while following the procedure below Loosen the three 3 slotted screws item A and remove the aluminum battery cover item B see figure 6 Plug in the new battery cable at the main board connector J7 or J8 see figure 1 If present unplug and remove the old battery pack item C Install the new battery pack
72. SHONA lsi3dd3d SY HONS XNIN SWHO S OXVW AOT 30 SH313WVasvd ONIAVH 13NNVHO 319 15 3AILISUd G3IJIL332 9502 1 26 531435 1 915 MD 2X3 Z43 C315NIS 3 223 SHONA 3dd3d 5 I 5 CWHO 29 A9 8 04 061 980 15 1068 0 0I 0SI 980 10 10068 THVLS X3 1DNIS CWHO 01 X 3 1DNIS WHO O0T AST STZ Cina OI AS Z 8 2 SH3IHUVHS 2 YD ON NAHM gt lt 319 152 001 00 061 20 1006 THVLS HLIM 3SN 10N Dd civna WHO 06 A6 291978 1 S310Nx 2 annoy Hlava S 201 SNOGYVZVH NON A Lt o wd c NL U 9 x U A ddnS 33 Ud WwWN UILIgO 2161 auvoa O3s83 AINO 1 1313 1404 AINO 01 193NNOO SlaOd 791435 IV ININ Seez ov ININ 1691 07 Ga vD8 NIVW INIW 23032213 Page 149 1 0 9 WHO HLava AG 11 5512 NOILVDO1 SNOQYYZYH 1 101 Mercor lt NOILdO gt 3a8 03d dW3l 9 1 90 0 dW3 L 1079 Q71313 Tix 0958 02 AT Operators Guide ini M
73. Shee wavy 29 tal QNnONO g edi C 445 FE 31522 84 c 522 9 Gx UE S3sunad o wages lt o om Em 19 gt lo HH x H NDILdD 1V INIA ONIMIM 01315 SIDA vaa In H HLM 190d 211 H OL 193NNOO 171313 H SisDd IN 22 ININ 1691 07 JF EX ote ape NIYW 02 NOUVOO1 SNOQYYZYH NON MH 20 v2 S60 or9i N2 SLUOA 062 3133 NI NOILYVIVISNI 50 3 9 2eT1d VSI ISNV CNY d LNOO T naxos ININ X03JAW 2 Sdnowo AQ 55 10 201 SNOQYYZYH a 66720720 _ CP HNE HOLO3NNDIO 3SV29 9 VIA sU GavDS NIVW NO 19 I3123NNDO 0958 0 sDIvegllv9 91313 LNGW OSISNI SHL 7193 329507 OL TIVHS SNWV3hW OL GALISNNOD 38 15 ONY 37 1 0 SY S IVNIWH3I 01 35079 Sv 5 LIN3WdInO3 3GISNI SG3IHS 6 WHO 5537 TIWHS GNhDSO Hia3Vv3 51535 28 d LNDO 9 N35 S3LON XVW WHO T HLava Page 147 1 1ni Me
74. T back view 1 4 fitting Optional 2nd Pressure Port Pressure Line 13 Insert the slip along fitting into the thermowell and place the temperature probe into the slip along fitting sliding the probe down until it bottoms out in the thermowell before tightening the slip along nut L Temperature Probe Th 1 Slip Along Fitting 14 Atthis point the instrument should be ready for operation Page 12 Mercor Mini AT Mini AT Operators Guide Correction Factors to Metered Volume Ideal or perfect gases follow the relationship of Boyle s Law for pressure effect and Charles Law for temperature effect which can be stated The volume of any definite weight of a perfect gas varies inversely with change in absolute pressure and directly with change in absolute temperature The equation for this relationship of the two laws is expressed as follows VIP _ V2P2 1 7 202 The Symbols V1 P1 T1 referto the original volume pressure and temperature while V2 P2 and T2 refer to the volume pressure and temperature of the new or changed conditions Rearranging the equation and rewriting subscripts we can express it as follows Pm Tb Vb Vm X X Pb Tm Where Vb gas volume cu ft at base conaiuon corrected Pb absolute base pressure psia Tb absolute base temperature deg R Vm gas volume metered cu ft uncorrected Pm absolute meter pressure psia Tm absolute meter tem
75. TE TIME OUT Examples of LCD Displays 45 42 1 0004 VOLTAGE EE 8 27 WAND 1 MINUTE CASE TIME OUT TEMPERATURE MAG WAND 47 19 55 O e EN Fig 17 Meter Reader List For Example 3 Mercor Mini AT Page 55 Mini AT Operators Guide Item Number Enable Item Code 136 Item Number Enable provides identification of the displayed mag list items The default configuration of Mag List 1 and Mag List2 provides no item identification When the Item Number Enable feature is enabled the meter reader list will include the display ofthe list s sequence number and the item code number for the value that will be displayed on the next mag wand input This feature is available for Mag List 1 Mag List 2 and Live Display items Although this feature is functionally the same for both mag list and 2 there is a slight difference in the display of sequence numbers Mag List 1 items include a leading zero while Mag List 2 items do not Live display items are indicated by the letter L and a number e g L1 008 is Live PCor Gas Pressure This difference will allow the user to determine if the LCD is displaying is a Mag List 1 Mag List 2 or Live item The Item Number Enable provides eight possible options Use Mini AT Link software to select which mag list is to include the item code identification The eight options are None Live List 1 List 1 Live List 2 List 2 Live
76. TURE is a value greater than the value entered at item 028 TEMP an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 146 00000000 at item 146 indicates there is no Temperature High Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled Also see item 106 Temperature High Limit value item 028 is user selectable and is normally set somewhere between 50 and 100 of transducer range Default 00000000 147 COMPRESS TYPE Selection to allow the user to choose the type of gas compressibility calculation employed during each correction cycle wake up Selection 0 NX 19 results in the implementation of AGA 3 NX 19 Supercompressibility calculations Selection 1 AGA 8 resultsinthe implementation of AGA 8 calculations Select 0 NX 19 Default 1 8 Note When selecting AGA 8 items 053 054 and 055 are disabled However the values at these items may be changed for reference only AGAS software must be used to create a computer file aga which includes user selectable values for Specific Gravity oN and The file must be transferred to the connected Mini AT using Transfer Send AGAS Factors with Mini AT Link Software An AGA 8 file with defaulted values for Specific Gravity 0 6000 oN 0 0000 and 0 0000 is provided with each Mini AT Link Software package Ot
77. The electronic Form C volume output counts consist of contact closures between both the K Y and the K Z terminals For proper counting the receiving device must count both The pulse off time for Form A pulses can be varied by the selection of item 115 If the board jumpers configured for Form C then Item Code 115 controls the pulse width of the Form C pulses Select 0 0 0625 Sec Default 1 0 5000 Sec 2 1 0000 Sec 3 0 1250 Sec 4 0 2500 Sec Value at Pulse Pulse tem 115 Repetition Repetition Code Sec Rate 5 Sec Rate CPS 0 0625 0 0625 0 0625 16 00625 0125 8 05 05 o5 2 0 9985 1 1 0 125 0 125 0 125 8 0 1875 025 4 Table 5 Output Pulse Codes The pulse timing chart on the next page compares the relationship of Pulse Width Pulse Cycle Pulse Off Time and Pulse Repetition Rate Mercor Mini AT Page 41 Mini AT Operators Guide 0 0 Sec TIME 1 0 Sec TIME 2 0 FORM C ITEM 115 0625 4 2 2 4 pulse cycle 125 Sec FORM A ITEM 115 500 KY PULSE WIDTH 0625 Sec PULSE OFF 9375 Sec pulse cycle 1 00 Sec FORM A ITEM 115 1 00 PULSE WIDTH obs Sec PULSE OFF 1 9375 Sec 1 2 00 Sec FORM A ITEM 115 125 KY PULSE WIDTH 0025 Sec PULSE OFF 1875 Sec pulse cycle 250 Sec FORM A ITEM 115 250 KY PULSE WIDTH 025 Sec PULSE OFF 4375 Sec
78. abeTie Plug Strain Relief 5 16 dia a EA eee EEE 0 1202 5 Bd 26 32 x 3 16 60 1247 crew Spanner 6 32 x 5 16 20 7558 Optional Indexes 20 8124 Optional Temperature Probes eu Page 141 Mini AT Operators Guide e mas Ge lt Qa Wall Mount Mini AT Mercor Mini AT Page 142 Mini AT Operators Guide Mini AT Wall Mount Parts List Item Qty Part Description 1 12 13 14 15 20 7380 732 Silicone 16 17 ee peu 19 Plug 1 2 20 21 22 23 a 25 e 27 28 29 30 pecie Mini AT Wall Mount Options 2 3 4 5 6 7 8 9 k CO Oj O1 BY Go PO 10 12 13 14 15 16 17 Mercor Mini AT Page 143 AT Operators Guide ini M
79. ach pressure transducer regardless ofthe pressure range The coefficient values are determined by Mercury Instruments at the factory Note A Mini AT will not measure pressure accurately if the default coefficients are used Page 132 Mercor Mini AT Item 399 400 401 407 408 409 410 411 Mini AT Operators Guide Item Name RATELOW LIMIT INSTRUMENT CONFIG PLOG SAMPLE INTVL PLOG XDUCER TYPE PLOG PRESSURE UNITS PLOG PRESS DISP RES PLOG CAL DATE PLOG XDUCER SER Description Limit for Low Flow Rate Alarm item 461 Default 0 0 Item to enable or disable Plog Pressure Logging Select 2 PLogoff Default 6 PLog on Selection for the number of seconds between timed wakeups to obtain PLog pressure readings Select 0 60 Seconds 1 30 Seconds 2 15 Seconds 3 10 Seconds 4 5 Seconds Item to select if PLog transducer is gauge or absolute type Select 0 Gauge Default 1 Absolute Code 0 9 that selects the unit of measurement for PLog Gas Pressure 420 and other PLog pressure related items Select 0 PSIG Default 5 mBAR 1 PSIA 6 2 2 kPa 7 inWC 3 8 inHg 4 BAR 9 mmHg Code 0 4 that selects the number of decimal positions to the right of decimal point for item 420 and other PLog pressure related items Select 0 xxxxxxxx l xx xxXxXxxxx A XXXXXXXX SeXXXXXAXXXX 4 Date of the most recent change to PLog CAL ZERO Item
80. ad Audit Trail Read Event Log Read Alarm Log Read Short List Items Send Non Cal Items Send Cal Items Send Authorization Table Send AGAS Factors not Connected Ameslevet2 10729 2003 Mercor Mini AT Page 79 Mini AT Operators Guide 8 Select the Last N Days radio button from the option screen and type 140 into the blank Click OK and MasterLink will read the last 140 days of Audit Trail information from the Mini AT Site Name Default Mini AT Site Id 00000000 00000000 Date Range C Since Last Download 9 17 2001 10 35 43 AM Last N Days Since mm dd yyyy mm dd yyyy m Number of Items Other Options Download Item List Alten Verify Using Event Log 10ltem Purge 4 Item Duplicate Data Conversion File Options Include Conversion File 6 New Events Only Old Events Only 9 After the download is complete disconnect the link and exit MasterLink32 software Page 80 Mercor Mini AT Mini AT Operators Guide Procedure to upgrade Mini AT firmware 1 Connect the Serial Cable 40 1629 from the Mini AT port to the computer COM port Make Sure that pins 3 and 4 are jumpered on JB24 See page 75 for more information PC Running Firmware Manager version 1 0502 MINI A 3 Open Firmware Manager by double clicking on the icon 4 Select Send Mini AT Firmware by clicking the gas pump button Bi Firm
81. also Note The Mini AT can only enter Meter Reader Mode Level 1 Access Mode or Level 2 Access Mode from Corrector Mode If the instrument is in Meter Reader Mode it must be brought back to Corrector Mode to enter Level 1 or Level 2 Access Mode The same is true if the Mini AT 1 in Level 1 or Level 2 Access Mode the instrument must be brought back to Corrector Mode to enter Meter Reader Mode Corrector Mode The Mini AT normally operates in the Corrector Mode The other three modes always return to the Corrector Mode when completed The corrected volume continuously appears on the LCD display while the uncorrected volume 15 displayed on the mechanical index in the mounting bracket Uncorrected volume pulses are detected by magnetically actuated reed switches at each meter revolution The instrument electronics are normally in a standby asleep mode but are activated wake up by an input pulse generated from the reed switches During a wake up the instrument measures the gas pressure and temperature then calculates the correction factors and updates the corrected volume on the LCD display The electronic circuitry returns to the asleep mode to conserve battery power until the next full rotation of the meter output shaft Meter Reader Mode This mode provides the meter reader the ability to view instrument item values in addition to the corrected volume without opening the door By running a magnet activator along the right edge of the displ
82. an the value entered at item 027 TEMP LOLIM an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 144 00000000 at item 144 indicates there is no Temperature Low Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled Also see item 106 The Temperature Low Limit value item 027 is user selectable and is normally set somewhere between 0 and 50 of transducer range Default 00000000 145 PCOR PRESS HIGH ALARM This item 145 indicates if a high PCor pressure alarm was Page 110 generated During a wake cycle if the measurement for item 008 PCor GAS PRESSURE is a value greater than the value entered atitem 010 PCor PRES HILIM an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 145 00000000 at item 145 indicates there is no PCor Pressure High Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled Also see item 105 The PCor Pressure High Limit value item 010 is user selectable and is normally set somewhere between 50 and 100 of transducer range Default 00000000 Mercor Mini AT Mini AT Operators Guide Item No Item Name Description 146 TEMP HIGH ALARM This item 146 indicates if a high temperature alarm was generated During a wake cycle if the measurement for item 026 GAS TEMPERA
83. ansducer Optional Pulse Output Strain Relief Fitting UMB Back Temperature Probe Armor Mounting Bolts 4 Isolation Baseplate Figure 2 Back ofa Mini AT Meter Rotation A reversing gear in the Universal Mounting Bracket UMB permits either clockwise CW or counterclock wise CCW meter rotation to drive the Mini AT Before installing the Mini AT note whether the meter s drive rotation is CW or CCW The Mini AT should be configured to match the meter rotation In order to check the instrument rotation Remove the two slotted screws holding the transparent index cover Remove the two 2 black thumbscrews and lift out the index Compare the bevel gear placement with figures 3 and 4 to determine ifthe instrument is setup to work with a CW or CCW instrument drive Mercor Mini AT Page 21 Mini AT Operators Guide Change Rotation if necessary Use the supplied spline wrench to loosen the setscrew in the lower bevel gear The spline wrench can be found inside the Mini AT near the door latch e Shift the gear down against the cross bar CW or up against the upper gear CCW in order to achieve the proper gear setting When shifting the lower gear upward the alignment pin in the lower gear must engage the mating hole in the upper gear Tighten the set screw in the lower gear Replace the index and thumbscrews Ensure the bevel gears mesh properly with the face gear Replace the transparent index cover and
84. ansducers in the Mini AT The first method requires the use of a computer and Mini AT Link or MasterLink32 software The second method requires the use of the Mercor Mini Field Calibrator Both methods require a known value of the applied pressure and or temperature as a reference Back View RS 232 Port Pressure Transducer Case Connector Optional Second Pressure Serial Cable p Dead Weight Tester n 40 1629 Computer Pressure Source Fig 19 2 Point Pressure Calibration Page 60 Mercor Mini AT Mini AT Operators Guide 2 Point Pressure Calibration Defined A 2 Point pressure calibration requires two different pressures be applied to the instrument s pressure transducer and be sampled by the data acquisition circuits A low pressure value usually 0 0 PSI is applied to determine the Pressure Zero Calibration offset A higher pressure value is applied to determine the Pressure Span Calibration gain The default Calibration Parameters require that the Span Pressure exceed the Zero Pressure by at least 50 ofthe transducer range otherwise a Points Too Close error message is displayed To produce a linear pressure response for all rated pressures and temperatures each transducer has been factory characterized for ambient temperature effects The characterization process determines the proper compensation coefficients for each transducer The 2 point calibration process uses the coefficients when calculating the pressure o
85. aper Added Audit Trail p62 Automatic Call in p37 38 HELP Mode p39 LCD Diagnostic Display linking p27 Messenger Modem Wiring Diagram p134 PLog 14 Pulse Scaling Tables p46 47 Quick Start Guide 8 Modified Firmware Upgrade Procedure p32 34 Hazardous Location Drawings p126 131 Primary Components Drawing 125 December 2000 2 10 Added Flow Rate Calculation p61 Zero Flow Rate Items 124 Modified Alarm Table p40 Pulse Output Configuration p42 43 Meter Reader Mode p59 61 Linking Diagnostic Display 27 November 2001 211 Added Pulse Output Configuration Examples p46 47 Modified Alarm Table p40 Default Item Values 056 058 p82 CSA Installation drawings p129 132 June 2003 3 00 Added Modem Connection Drawings p33 34 Parts List Drawings p138 143 Modified Firmware Upgrade Procedure p77 86 Moved Main Board Layout Drawing 8 Jumper Settings 73 2004 Page 4 Mercor Mini AT Mini AT Operators Guide Introduction The Mini AT is a full featured stand alone electronic gas volume corrector Its standard mounting is on rotary turbine and diaphragm meters that have a rotating shaft instrument drive output The Mini AT is also com patible with meters that provide high or low frequency meter pulses when the appropriate interface board is installed The purpose of this Operators Guide is to provide the information necessary to install and use the Mini AT The Mini AT combines the size of Mercor Mini with the audit trail function
86. asurement for item 026 GAS TEMPERATURE is a value less than the value at item 027 TEMP LO LIM or a value greater than the value at item 028 TEMP HI LIM an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 106 00000000 at item 106 indicates there is no Temperature Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled Also see items 144 and 146 Default 00000000 This item 108 displays 11111111 to indicate that a standard alarm 069 071 099 104 143 146 163 or 222 or a selected optional alarm 105 or 106 has become active and that an alarm pulse was transmitted out the Alarm Channel 00000000 at item 108 indicates no alarms became active since the last Clear Alarms Default 00000000 Code 0 or 1 that selects Live or Fixed Factor Pressure When enabled for Fixed Factor the Pressure Factor entered at item 044 will be used for pressure correction instead of a Live pressure factor calculation based on the input from the pressure transducer item 008 NOTE if item 109 is Fixed a value must be entered at item 044 It may also be necessary to enter a value at item 008 Gas Pressure if Supercompressibility item 110 is Live Select 0 No Fixed Factor Live Default 1 Fixed Factor Code 0 or 1 that selects Live or Fixed Supercompressibility When enabled for Fixed Super
87. ature item 207 This is a running average so the value displayed during instrument access is the most recent calculated value Default 1 0000 Same as item 187 except this value is the average supercompressibility Factor for the current Gas Day This is a running average which is zeroed and begins a new calculation at the time entered at item 205 Therefore the value displayed during instrument access is the most recent calculated value for the current gas day Default 1 0000 Yesterday s Daily Unsquared Supercompressibility Factor 1 the daily unsquared supercompressibility factor that is one Gas Day old at the time instrument was accessed This item is updated with the value from item 188 at the beginning of every new gas day Note The gas day begins at the time entered at item 205 Default 0 0000 Mercor Mini AT Item 190 191 192 193 194 195 196 Mini AT Operators Guide Item Name DAILY ENERGY PREV DAY ENERGY DAILY PK FLOW RT DAILY PK FLOW TM PREDAY PK FLOW RT PREDAY PK FLO TM EVENT USER ID Description Same as item 140 Energy except this value is the running total for the current Gas Day which is zeroed and begins a new calculation at the time entered at item 205 Therefore the value displayed during instrument access is the most recent calculated value for the current gas day Default 00000000 Yesterday s Daily Energy i e the daily energy that is one
88. ay window on the door the meter reader can scroll through a sequence of readings These readings include up to 18 parameter values alarms live gas pressure and live gas temperature if desired At the time the meter reader activates the unit with the first mag wand input the unit updates all measurements and then displays the LCD Display Test This is to verify that all seven segments and decimal points of the eight digit LCD are functional The uncorrected volume continues to totalize on the mechanical index When the instrument receives a mag wand input while the last Meter Reader List item is displayed the unit will return to the Corrector Mode Ifthe Meter Reader List sequence has not been completed the unit returns to the Corrector Mode automatically after a one minute timeout period unless the instrument is displaying live pressure or live temperature in which case the time out period is 10 minutes Input pulses that accumulated while in Meter Reader Mode will be processed just prior to returning to Corrector Mode Mercor Mini AT Page 45 Mini AT Operators Guide Level 1 Access Mode Level 1 Access is considered a lower level access to instrument functions and is gained through the use ofalaptop computer Level 1 Access is a software function using the instrument s companion software Mini AT Link or MasterLink32 but requires the instrument to be connected to the computers RS 232 serial port The user must enter a valid five digit acce
89. c Pressure 079 MagList2Item 5 025 Transducer Range 080 MagList2Item 6 044 Pressure Correction Factor 081 MagList2Item 7 043 Total Corrector Factor 082 MagList2Item 8 048 Battery Voltage 083 MagList2Item 9 031 Case Temperature 084 MagList2Item 10 203 Time 085 MagList2Item 11 204 Date 086 MagList2Item 12 255 End of List Mercor Mini AT Page 49 Mini AT Operators Guide MODE MAG WAND INPU DISPLAY TEST T UNCORRECTED VOLUME 5 o yes WAND INPU es CORRECTED VOLUME yes b LIVE PRESSURE MAG WAND INPUT I 2 ALARMS CLEARED yes V PULSER A LIMIT ALARM PULSER B LIMIT ALARM PULSER C LIMIT ALARM BATTERY LOW VOLT ALARM BATTERY CYCLES ALARM MEM BATT LOW ALARM INDEX SW 1 FAULT ALARM INDEX SW 2 FAULT ALARM A D FAULT ALARM SELECTED ITEM 1 12 PRESS OUT OF RANGE ALARM TEMP OUT OF RANGE ALARM CHANGE TO PCOR PRESS LOW ALARM TEMPERATURE LOW ALARM PCOR PRESS HIGH ALARM yes TEMPERATURE HIGH ALARM RBX ALARM EVENT DAILY CORVOL ALARM PLOG PRESS HIGH ALARM Fig 15 PLOG PRESS LOW ALARM Flow diagram of Default Meter Reader List Page 50 Mercor Mini AT Mini AT Operators Guide The meter reader listis divided into four sections and can only be displayed in the following order MAG LIST SECTIONS DESCRIPTION 1 Alarm Codes Displayed only if any alarms are active 2 Mag List 1 Item codes 130 135 3 Live
90. cleared by the firmware upgrade so if you want to save those data they should be read before the firmware upgrade This program will store them in the Link database Would you like to save instrument data now Page 82 Mercor Mini AT Mini AT Operators Guide 7 The dialogue box from step 5 will reappear Click Start Upload to begin sending the Mini AT firmware Select Firmware Version Currently Installed gt r Mini AT File Name Version Loader LDR11101txt 1 1101 Corrector MAT6701txt 6 701 Default Mini AT Upload Configuration List Fibs of Type Firmware only File Narre Version Corrector met67010 txt 6 7010 mat66302 txt Directories mat67010 txt canmercuryfwmgrifirmwvare 5 mercury fwmar z firmware Drives lc JJLIELAND gt Cancel 8 Firmware Manager will display the progress ofthe upload When the upload is completed new dialogue box will appear stating that the upgrade was successful Click OK Select Firmware Version List Fibs of Type Upload orar File Narre Version Loader Corrector 167010 txt 6 7010 mat66302 txt Directories mat67010 txt carercuryfwirgrifirmvare E 5 mercury fwmar z firmware Drives JJLIELAND 7 Start zancel Firmware Manager 1 05 02 Corrector Upgrade Successfull 9 The firmwar
91. d digital index for indicating uncorrected volume is used to mount the Mini AT to a meter A reversing gear mechanism permits changing the index rotation to match meter rotation see figures 2 and 3 Input of uncorrected volume is made by magnetically operated reed switches A magnet is located on a disc shaft and is rotated by the meter output shaft There is very little torque loading on the meter The dual input switches allow contin ued operation if one switch should fails Input switch 1 is located along the right edge of the Input Switch Board 51 and switch 2 is located just to its left S2 If a switch failure is detected an alarm is displayed PCor Pressure System The PCor pressure sensing system incorporates a precision strain gage pressure transducer located inside the Mini AT enclosure with a 1 4 female case connection valve kit with shut off valve tubing and fittings is optionally available to make the pressure connection to the meter pipeline A plug in cable is used to make the connection from the pressure transducer to the main circuit board at J10 This transducer 15 used for calculating the pressure correction factor item 044 PLog Pressure System optional Theoptional PLog pressure sensing system incorporates a separate precision strain gage pressure transducer alsolocated insidethe Mini AT enclosure witha 1 4 NPT female caseconnection The Plogtransducercan beadifferentrange and type than the PCor transduce
92. digit year of manufacture 09901234 5 digit sequence during the year of manufacture Default 00000000 Lowest PCor pressure measured at item 008 since last manual reset Default 099999 99 Highest temperature measured at item 026 since last manual reset Default 40 00 Lowest temperature measured at item 026 since last manual reset Default 099999 99 High limit for the number of pulses accumulated in item 005 Initiates an alarm item 069 when exceeded Default 99999999 High limit for the number of pulses accumulated in item 006 Initiates an alarm item 070 when exceeded Default 99999999 High limit for the number of pulses accumulated in item 007 Initiates an alarm item 071 when exceeded Default 99999999 If the value at item 005 Pulser A exceeds the Pulser A Limit item 066 an alarm is initiated The LCD will display dots while in the Corrector Mode and item 069 will display 11111111 if view by the Meter Reader Mode or software 00000000 is displayed if item 069 has no alarm Default 00000000 If the value at item 006 Pulser B exceeds the Pulser B Limit item 067 an alarm is initiated The LCD will display dots while in the Corrector Mode and item 070 will display 11111111 if view by the Meter Reader Mode or software 00000000 is displayed if item 070 has no alarm Default 00000000 Mercor Mini AT Item 071 072 073 074 075 076
93. ducer Ranges Pressure Range Transducer Type PSI BAR T 6 718 0 1 0 07 Gauge only 0 3 0 2 Gauge only AOT ass 0 6 0 4 Gauge only 0 15 1 0 Gauge only 0 30 2 0 Gauge or Absolute 10 0 60 4 0 Gauge or Absolute te aes 0 100 7 0 Gauge or Absolute PRESSURE 0 300 20 Gauge or Absolute CONNECTION 0 600 41 Gauge or Absolute 4 0 1000 70 Gauge or Absolute 0 1500 100 Gauge or Absolute Live display of input pressure on LCD 6 FEET Input Temperature ARMOR e Highly stable solid state temperature sensor in a sealed V7 diameter 9 long stainless steel probe with 6 armored conductor and gt NPT nylon slip along fitting to match thermowell e Range 409F to 1709F 40 C to 76 6 C Live display of input temperature on LCD Corrected Volume Corrected to desired Base Pressure amp Base Temperature Corrected for Supercompressibility NX 19 or AGA 8 Selectable volume units both Metric amp Imperial e Displayed continuously on 8 digit x LCD Power e 5 5 to 9 0 VDC e Battery life 3 years w Alkaline Battery Pack e On board UPS 3 AA Alkaline battery Lithium AC or Solar Optional e Main battery voltage Backup battery voltage and alarms displayable on LCD Page 6 Mercor Mini AT Mini AT Operators Guide Output Volume For data collection systems Jumper selectable for one Form C or two Form A Jumper selectable pulse width default 62 5 msec One mechanical
94. e Transfer Menu select Send Cal Items MasterLink32 A Calibrate Display Instrument Reports Graphs Setup Transfe ansfer Help ITEM oh eE a e ike Read Item File AUD Read Authorization File E 8 Read Audit Trail Read Event Log Read Alarm Log Read Short List Items Send Non Cal Items Send Cal Items Send Authorization T able Send AGAS Factors ix Not Connected Access Level 2 10 00AM 10 15 2003 Mercor Mini AT Page 85 Mini AT Operators Guide 7 MasterLink will display a warning message stating that Transducer coefficients should not be altered Click the Yes button to continue MasterLink will now display a Calibration Options window Make sure all boxes are checked and click OK to continue MasterLink32 e Transducer coefficients should not be altered Are you sure you want to continue X Pressure 2 X Temperature 8 From the Instrument Menu select Set Instr Date Time via computer 2 MasterLink32 File Calibrate Display Instrument Reports Graphs Setup Transfer Help ITEM SP Establish Link EZ Disconnect Link D Abort Communications Change Instrument Access Code Change Site Name for Instrument Display Calibration Parameters Set Instr Date Time via Computer ix Not Connected Access Level 2 10 00 AM 10 15 2003 9 Verify that the correct time and date are being sent to the instrument Click Yes to send the time
95. e a number from 1 to 15 the default value is 1 Instrument wake up due to meter rotation other than the Nth revolution are referred to as Intermediate Wake ups During an intermediate wake up gas pressure and gas temperature are not measured and the LCD is not updated However the last calculated correction factors are used to update the volume registers If the Mini AT has been configured to output volume pulses the pulses will be transmitted at the end of each intermediate wake up Since the analog circuits are not active and the LCD is not updated during an intermediate wake up much less battery power is used as compared to an instrument with Revs Per Wake up equal to one N 1 Regardless of the value of audit trail logging will always occur at the time interval specified at item 202 Mercor Mini AT Page 17 Mini AT Operators Guide Access Levels for Operating Personnel There are four levels of instrument access available on the Mini AT for operating personnel The first level referred to as the Corrector Mode displays the corrected volume on the LCD and the uncorrected volume on the digital mechanical index The Corrector Mode also provides a visual indication for instruments in an alarm condition The second level available is referred to as the Meter Reader Mode Meter readers can use a magnetic wand to scroll the values of specific items on the LCD Uncorrected and corrected volumes a limited number of pre specified
96. e main menu 7 Select Temperature Calibration from the sub menu 8 With the tip of the temperature probe lowered into the ice bath perform the Temperature Zero Calibration The temperature displayed in green on the computer s screen is a live reading This permits the user to determine if the temperature has stabilized so that a sample may be obtained Click the Average Temperature Now button when it becomes active text changes from gray to black to obtain a sample of the temperature 9 When Mini AT Link displays the Average Temperature the value should be changed to match the reading of the calibrated thermometer by clicking the Change button when it becomes active Enter the temperature value for the zero reference temperature usually 32 degrees F and then click OK The Mini AT will calculate the required difference offset store this calculated value at Item Code 035 display the new value for item 035 and the previous value at item 036 before returning to a live temperature reading 10 Compare the displayed temperature to the reference temperature If the Mini AT s temperature reading is not acceptable click the Average Temperature Now button again to obtain another temperature sample The program will continue to loop back to the live temperature reading Obtain as many temperature samples as necessary until an acceptable temperature reading is displayed 11 If the Mini AT s zero temperature reading is
97. e most recent wake up using Charles Law for values at items 026 and 034 when item 111 1 set for LIVE Items 045 and 026 may be fixed factored to any reasonable value by the user if item 111 is set for FIXED Default 1 0000 Mercor Mini AT Page 93 Item 046 047 048 049 050 051 052 053 054 055 Mini AT Operators Guide Item Name AUX COR FACTOR UNSQUARED SUPER BATTERY VOLTAGE BATTERY LOLIM V SHUTDOWN VOLTAGE BKUP BATT VOLTS BKUP BATT LOLIM V SP GR FOR SUPER N2 FOR SUPER CO2 FOR SUPER Page 94 Description Factor to provide for other possible corrections to metered volume i e Water Vapor Content Therms etc If not applicable set to 1 0000 Default 1 0000 AGA 3 NX 19 8 Supercompressibility factor calculated at the most recent wake up from values at items 008 026 053 054 and 055 if item 110 1 set for LIVE May be fixed factored to any reasonable value entered by the user if item 110 is set for FIXED Default 1 0000 Main battery voltage measured at last wake up Default 0 00 Low limit for main battery voltage initiates alarm item 099 if voltage drops below this value Default 5 50 The voltage level at which most of the electronic circuits terminate operation H E L P is displayed on the LCD as anindication thatthe battery is dead and needs replaced The upper limit setting forthis item 1s 5 50 volts Default
98. e the temperature probe is inserted into the gas line s thermowell record write down the Mini AT s live temperature reading 4 Remove the temperature probe from the thermowell and insert the stem of the calibrated thermometer into the thermowell Mercor Mini AT Page 71 Mini AT Operators Guide 5 Afterthetemperature has stabilized write downthe temperature from the calibrated thermometer 6 Reinstall the temperature probe into the thermowell and allow the temperature to stabilize 7 Comparethe Mini AT s live temperature reading to the temperature from the calibrated thermometer If the temperature readings are within tolerance proceed to step 12 8 Ifthe Mini AT s live temperature is greater than the calibrated thermometer s temperature press the DOWN button on the Mercor Mini Field Calibrator until they agree If the Mini AT s live temperature is lower than the calibrated thermometer s temperature press the UP button until they agree 9 Press the ENTER button to lock in the temperature reading Note The Mini AT s LCD will go blank for a second while the instrument is computing the new T Zero value When completed the LCD will return to a live temperature display and further adjustments are possible if needed 10 If the two readings are within tolerance no further adjustments are needed proceed to step 12 11 If the two readings are outside an acceptable tolerance consider the most appropriate action listed in step 6 of Si
99. e up item 202 If the instrument is accessed this item will display the current value for that point in time Default 00000000 Mercor Mini AT Item No 229 230 231 232 233 234 235 236 237 238 239 240 241 242 Mini AT Operators Guide Item Name OPTN REP ITEM 1 OPTN REP ITEM 2 OPTN REP ITEM 3 OPTN REP ITEM 4 OPTN REP ITEM 5 OPTN REP ITEM 6 REPORT TRIGGER 1 REPORT TRIGGER 2 REPORT TRIGGER 3 REPORT TRIGGER 4 REPORT TRIGGER 5 REPORT TRIGGER 6 REPORT TRIGGER 7 REPORT TRIGGER 8 Description The last six of ten user selectable Audit Trail Report Items that can be placed in Audit Trail memory The use of these six items 15 optional If any of these six items are other than 255 the instrument is forced to store the maximum ten audit items per record In this case up to five 255s can be used to specify a blank unused column To configure audit trail memory for only four items per record place a 255 in all six item codes 229 234 If audit trail memory is configured for four items and then is to be returned back to the default ten item arrangement the instrument must betaken UNCONFIGURED by jumpering pins 3 amp 4 of JB24 and cycling the power This will erase all audit trail data and re map the RAM memory for ten item configuration Default 048 Battery Voltage See above Default 000 CorVol See above Default 002 UncVol See above
100. e upgrade is now completed Exit Firmware Manager and disconnect the Mini AT from the computer Mercor Mini AT Page 83 Mini AT Operators Guide After Upgrading Firmware restoring instrument configuration 1 Open MasterLink32 software 2 Connect the Serial Cable 40 1629 from the Mini AT port to the computer COM port MERCUR PC Running MasterLink32 version 3 30 MINI A 4 From the Transfer Menu select Send Non Cal Items MasterLink32 File Calibrate Display Instrument Reports Graphs Setup Transfer Help ra 242 SERE Es gt Ej da 28 Read Audit Trail Read Event Log Read Alarm Log Read Short List Items Send Non Cal Items Send Cal Items Send Authorization T able Send AGAS Factors hot Connected 20 Access Lever 5 10715 2003 Page 84 Mercor Mini AT Mini AT Operators Guide 5 Selectthe Item File that was saved in step 4 ofthe Pre Firmware upgrade procedure from the list and click the Open button Lookin ars el E gil es es ml 21 0004958 ima 21 0205878a ima 21 sacaltoc IM 2 0008397 a 0205890 al socaltoc2 IMA 0104133a ima 2156006 ima socaltoc3 IM 2 0107039a ima Goochs2 IM 2 0108330a ima 2 Kreisel 01_20011 e 0204856a ima PPGITEMLIST IMA Files of type MiniAT Item Files IMA Cancel 6 From th
101. eal time clock will continue to update however new volume pulses will not be counted and the instrument will not display corrected gas volume The LCD will show dashes across the display The instrument still draws normal back ground current from the main battery when placed in partial shutdown but it preserves all item values and audit trail information To recover from a partial shutdown i e return to Correct Mode simply establish a serial link with the Mini AT using the standard Mini AT to computer cable 40 1629 and any software package that communicates with the Mini AT 2 Complete Shutdown Mini AT into complete shutdown from MasterLink32 software select and confirm SHUTDOWN from the Instrument menu then pull the plugs to both the main battery or other power source and the backup battery J26 In complete shutdown the instrument s clock will stop working and new volume pulses will not be counted The instrument s configuration data and all item values are retained in however audit trail and AGAS data will be lost The LCD display will be blank once the batteries are unplugged In order to bring the Mini AT out of a complete shutdown simply plug in the main battery and the backup battery It will be necessary to reset the date time corrected volume uncorrected volume and other items that were erased as a result of the complete shutdown Page 88 Mercor Mini AT Mi
102. ection 4 of the meter reader list The factory default items are listed below however any Mini AT item code can be placed into Mag List 2 Ifless than twelve items are required place the value 255 into the item code location after the last desired Mag List 2 item Mercor Mini AT Page 53 Mini AT Operators Guide Item Legend Code 075 List 2 Item 1 076 Mag List 2 Item 2 077 List 2 Item 3 078 Mag List 2 Item 4 079 MagList2 Item 5 080 Mag List 2 Item 6 081 Mag List 2 Item 7 082 MagList2 Item 8 083 Mag List 2 Item 9 084 Mag List 2 Item 102 085 Mag List 2 Item 112 086 List 2 Item 122 Example 3 Selected Item 200 113 013 014 025 044 043 048 031 203 204 255 Description Site ID High Resolution CorVol Base Pressure Atmospheric Pressure Transducer Range Pressure Correction Factor Total Correction Factor Battery Voltage Case Temperature Time Date End Of List Suppose Display Test Site ID Corrected Volume Uncorrected Volume Live Gas Pressure Live Gas Temperature Gas Pressure Maximum Unsquared Super Battery Voltage and Case Temperature are the only items desired for the meter reader list The item code numbers listed below would be configured as follows Item Item Legend Code 075 List 2 Item 1 076 List 2 Item 2 077 List 2 Item 3 078 Mag List 2 Item 4 079 Mag List 2 Item 5 080 Mag List 2 Item 6 081 Mag List
103. em 6 255 End Of List Live Parameters Display The Live Parameter Display will allow up to three parameters to appear in section 3 of the meter reader list The only three parameters that may be a live display are Live PCor Gas Pressure Live Gas Temperature and Live PLog Gas Pressure These should not be confused with item codes 008 PCor Gas Pressure 026 Gas Temperature and 420 PLog Gas Pressure Ifitem codes 008 026 and 420 are part of the meter reader list the values displayed are PCor gas pressure gas temperature and PLog gas pressure placed into memory at the time of the initial mag wand input not live readings When item codes 008 026 or 420 are encountered during a Meter Reader Mode the values previously placed in memory are recalled and then displayed Mercor Mini AT Page 51 Mini AT Operators Guide The purpose of providing a Live Gas Pressure and Live Gas Temperature istwofold First it will allowthe meter technicianto monitorthe gas pressure withoutattaching a portable pressure gauge Second the metertechnician canattach a Mercor Mini Field Calibratorto J2 onthe main circuit board and performa single point pressure ortemperature calibration Hence the instrument can becalibrated withoutthe need ofa laptop computer The option selected at Item Code 129 Live Display Enable determines which live parameter if any will be displayed after the display of the last Mag List 1 item The available selections using Mini AT Link
104. emperature calibration process is complete As a suggestion recheck the temperature zero reading and any number of temperature points within the transducer range or click Done to exit the calibration sequence Mercor Mini AT Page 69 Mini AT Operators Guide Single Point Temperature Calibration Defined A Single Point Temperature Calibration allows the user to check and adjust any temperature reading up to the instrument s maximum rated temperature 170 F During a single point calibration the user compares the Mini AT s live temperature reading to a reference temperature More than one temperature reading may be compared i e ice bath and line temperature are two convenient temperatures to check If the two temperature readings agree the instrument is assumed to be calibrated If the two temperature values are different the Mini AT s temperature reading may be adjusted until it agrees with the reference temperature The Mercor Mini Field Calibrator is used to make adjustments to the live temperature reading during the single point calibration While viewing the live temperature display pressing the UP or DOWN buttons will raise or lowerthe temperature reading respectively Pressing and holding down either button will scroll the reading Pressing and quickly releasing either the UP or DOWN button will change the temperature by 0 01 degrees The new temperature reading is locked in when the ENTER button is pressed If the ENTER butt
105. emperature may be included as part of the meter reader list While displaying live pressure or live temperature a single point calibration may be performed if a Mercor Mini Field Calibrator is connected to connector J2 on the main circuit board The live parameters have a 10 minute time out to provide enough time to complete the calibration process Gaining Access To Meter Reader Mode To gain access to the Meter Reader Mode run the red tip of the magnet activator mag wand along the right side of the Corrected Volume LCD window see figure 13 Upon entering the Meter Reader Mode the LCD will go blank for about 1 second The transmission of volume pulses is suspended while inthis mode The instrument takes a pressure and temperature measurement and recalculates all item values prior to an LCD display Numeric Display Mag Wand Start at top of label and stroke downward to bottom right corner Fig 13 Position of Mag Wand to Activate Meter Reader Mode Mercor Mini AT Page 47 Mini AT Operators Guide Default Meter Reader Display While in the Meter Reader Mode the Mini AT continues to recognize and accumulate meter input pulses Also 1 minute and 10 minute Time outs are used to automatically return the instrument to the Corrector Mode By design the Corrector Mode requires much less electrical energy than all other operating modes The time out periods are safeguards to insure that the batteries are not needlessly wasted Refer
106. ence pressure usually 0 0 and then click OK The Mini AT will calculate the required difference offset store this calculated value at Item Code 017 or 414 display the new value for item 017 or 414 and the previous value at item 018 or 415 before returning to a live pressure reading 10 Compare the displayed pressure to the reference pressure If the Mini AT s pressure reading is not acceptable click the Average Pressure Now button again to obtain another pressure sample The program will continue to loop back to the live pressure reading Obtain as many pressure samples as necessary until an acceptable pressure reading 15 displayed 11 Ifthe Mini AT s zero pressure reading is acceptable click the Span button to change to the Span Calibration sequence 12 The screen title should have changed to Pressure Span Calibration At this point the software is waiting to sample the applied pressure that exceeds the zero reference pressure by at least 50 of the rated pressure transducer range Increase the pressure applied to the Mini AT to the span reference pressure Example 1 If the zero reference pressure on a 100 PSI transducer equals 0 0 PSI then the span reference pressure must be between 50 00 and 100 00 PSI Example 2 If the zero reference pressure on a 600 PSI transducer equals 0 0 PSI then the span reference pressure must be between 300 00 and 600 00 PSI 13 The span calibration also displays a li
107. erators Guide Item Name MAX DIAL RATE MAXFLOW RATE DATE DD MM YY SITE ID SITE ID PART 2 INTERVAL Page 118 Description The highest Instantaneous Dial Rate item 218 since last manually reset Default 0 00 The highest Instantaneous Flow Rate item 209 since last manually reset Default 0 00 The calender date displayed with the first two digits as DAY the second two digit as MONTH and the last two digits as YEAR Note A date entered at this item 199 will also appear at item 204 The date format of item 204 15 governed by the selection at item 262 If the Event Log Lock item 149 is set to 1 then the Date Format item 262 will be set to Code 2 YY MM DD Asa result item 204 and item 199 will get changed to Y Y MM DD format At this point item 262 may be changed to any of the format options and will be reflected at item 204 but item 199 cannot be changed from the Y Y MM DD format Default 01 01 98 Format DD MM YY User assigned eight digit numeric site number Limited to characters 0 9 The and are not valid characters Note Mini ATs downloaded using Mercury Instruments Windows based software must be configured for unique Site ID Numbers at items 200 and 201 Default 00000000 Eight additional digits for the site number if needed Note Mini ATs downloaded using Mercury Instruments Windows based software must be configured for unique Site
108. f Time The batteries should be replaced immediately when the instrument is in HELP mode After the replacing the batteries if the voltage is above 4 8 volts a mag wand input or serial access will wake up the instrument This will allow the Mini AT to function normally again Page 36 Mercor Mini AT Mini AT Operators Guide Alarm Pulse Outputs The Mini AT will generate a Form A 100 millisecond wide pulse on every new alarm and if RBX is enabled on every alarm automatically cleared The alarm pulse is available at terminals A and of TB1 and TB2 Item Code 108 Alarms Output will be logic High 11111111 to indicate an alarm pulse has been transmit ted Ver Ver Ver Ver ALARM DESCRIPTION ITEM E CODE 16 0206 6 1403 6 5121 16 7010 PULSERA OVERLIMT 69 069 X X X X PULSER B OVER LIMIT PULSER C OVER LIMIT MANBATTERYLOW 99 E099 X X X X BATT CYCLES LIMIT MEMORY BATT LOW INDEX SW 1 FAULT INDEX SW 2 FAULT A D FAULT PRESS OUT OF RANGE TEMP OUT OF RANGE PCOR PRESS LOW TEMPERATURE LOW PCOR PRESS HIGH TEMPERATURE HIGH FLOW RATE HIGH RBX ALARM EVENT DAILY CORVOL PLOGPRESSHIGH 451 6451 X X X PLOG PRESS LOW FLOW RATE LOW 461 E461 REPLACE MAIN BATT SHUTDOWN H E L P H E L P Table 4 Mini AT Alarm Codes Mercor Mini AT Page 37 Mini AT Operators Guide Pulse Outputs As a standard feature the Mini AT provides a corrected and u
109. ffset and pressure span values Once these two points have been calculated and stored in the instrument s memory all other applied pressures are automatically linearized and temperature compensated by the coefficients 2 Point Pressure Calibration Procedure Gauge Transducers 2 Point Pressure Calibration Items Required Mini AT Pressure Source and fittings capable of providing pressures of at least 50 ofthe Mini s pressure transducer range Pressure Reference accuracy to equal or exceed the accuracy of the Mini A T s pressure system Computer Compatible Mini AT Link Software or MasterLink32 cable p n 40 1629 2 Point Pressure Calibration Procedure Make certain that the Pressure Compensation Coefficient listed in item codes 301 through 332 341 through 372 for PLog are for the pressure transducer installed Also verify that Item Code 087 or 408 is the desired pressure unit Item Code 138 or 41 1 matched the transducer serial number label and Item Code 112 or 407 is set for Gauge type transducer Refer to figure 19 when pressure calibrating the Mini AT Since the two point calibration is mostly a software function references to the appropriate sections in the Mini AT Link and MasterLink32 software are included 1 Connect the pressure source and pressure reference to the selected Mini AT pressure connector PCor or Plog 2 Using serial cable p n 40 1629 connect from the computer s serial port to the
110. gle 8 digit 1 2 high numeric display is mounted in the door ofthe Mini AT and is viewable from the outside with the door closed The LCD Liquid Crystal Display normally displays the corrected volume with 4 5 6 7 or 8 digits The LCD can be configured to display any Mini AT item The LCD is also used to indicate alarm conditions and also to display the items configured into the Meter Reader List Passing a Mag Wand along the right side of the corrected volume LCD window or pressing on the optional pushbutton allows the user to view a pre selected sequence of instrument readings MasterLink software is used to select which instrument readings are to be displayed and the order in which they appear Computation Intervals The Mini AT s computation interval is referred to as a Full Wake up During full wake up power is applied to all electronic circuits so that pressure temperature and voltage measurements may be obtained and a new Total Correction Factor Item Code 043 16 calculated The LCD and volume registers are also updated The measured parameters are compared to the alarm limits and an alarm is triggered if limits are exceeded After completion of these tasks the circuitry will return to the Asleep mode and begin transmitting corrected volume pulses if item code 093 094 or 095 is set for pulse out The full wake up interval can be adjusted by changing the value N at Revs Per Wake up parameter at Item Code 124 Values for can b
111. hatthe volume hasincreased by an expected amount With zero applied pressure and atroom temperature the additional corrected volume should be essentially equalto the meter index rate times the number of turns 10 ofthe wriggler Note the scalingofcorrected volume item 090 may make it necessary to apply more than ten revolution to see an increase at the LCD Page 20 Mercor Mini AT Mini AT Operators Guide Standard Instrument Mounting The Universal Mounting Bracket UMB permits installation of the Mini AT on American Rockwell Romet RootsorSchlumberger metersthat have an instrument drive The UMB housing may be rotated aboutthe base plate so that the instrument and index will face in any of four 4 directions by removing all four 4 screws which attach the base plate to the bracket housing Replace them after you have repositioned the UMB housing Refer to Figure 2 and the following procedure when installing the Mini AT on a meter 1 Position the universal mounting bracket UMB and gasket on the meter mounting plate Install the four 4 mounting bolts and tighten 2 Connect the pressure tubing to the 1 4 NPTF case pressure connector on the rear of the instrument case 3 Install the temperature probe slip along fitting into the thermowell 4 Insertthe temperature probe into the slip along fitting and tighten Case Back RS 232 Serial Port 1 4 NPTF Case Pressure Connector Plug for Future Expansion Location of PLog Tr
112. he value is normally very close to 1 0000 and is calculated on each PCor Pressure Span Calibration Default 1 0000 The previous value of item 020 updated on each PCor Pressure Span Calibration Default 1 0000 The previous value of item 021 updated on each PCor Pressure Span Calibration Default 1 0000 The configurable spread or difference expressed in percent of full scale of pressure range required between PZERO and PSPAN calibration points Default 50 0000 The configurable maximum allowable change expressed in percent of full scale of pressure range to PZERO and PSPAN calibration points Default 2 0000 PCOR TRANSDUCER RGE The upper range limit of the installed PCor pressure GAS TEMP GAS TEMP LOLIM transducer always expressed in PSI Default 100 00 Gas temperature measured at the last wake up and used in calculating the temperature correction factor item 045 The temperature value is scaled to the unit of measure selected at item 089 If the instrument is set for fixed factored temperature item 111 item 026 should be manually set to the average flowing temperature used in the supercompressibility calculations if super is active item 110 Default 0 00 Low limit for temperature initiates alarm item 106 and 144 if exceeded Default 35 00 Mercor Mini AT Page 91 Item 028 029 030 031 032 033 034 035 036 037 Mini AT Operators Guide Item Name
113. her values for Specific Gravity N2 and CO2 will require AGA 8 software to create a new aga file s 148 INCREMNTLENERGY Same as item 140 Energy but is initialized to 00000000 after every TIME log trigger item 202 If interrogated the value displayed indicates the most recently logged value Default 00000000 Mercor Mini AT Page 111 Mini AT Operators Guide Item No Item Name 149 EVENTLOGLOCK 163 RATE HIGH ALARM 164 RATE HIGH LIMIT Page 112 Description The function of the Event Logger is to record Date Time UserID assigned Sequence Number Before value and After value for changes made to instrument item values or other specific user activity By default the Event Logger is Unlocked meaning old event records begin to be overwritten after 500 event changes The Event Log Lock can only be enabled with Mini AT Link software when the Event Logger Lock Jumper is installed at JB24 pins 9 amp 10 Once enabled Locked the functionality of the Event Logger conforms to Canadian regulations as specified by Measurement Canada Several key requirements include After the Event Logger Lock is selected the lock is permanent i e it cannot be changed back to Unlocked When the number of event records in memory reaches the maximum of 500 records the Event Logger information must be downloaded to a computer before any additional instrument changes are permitted New events are automatica
114. hod is accomplished by sending Hayes AT type commands out the serial port to a generic type modem such as the Messenger Modem In this method the Mini AT firmware takes control ofall call related functions including call retry During an alarm call in in this method the LCD displays LEvvvvvv to let the user know that a call in is being attempted To use this method set the following items 333 Call in Trigger 1 Alarm Call in Only 486 Modem AT Enable 1 Call in via AT commands 491 Modem Init String Initialization command of the modem Default amp F 492 Modem Dial String Command sent to initiate dialing Default ATDT 493 A Alarm Call In Phone Phone number to call for alarm 494 Modem Hang up String Command sent to modem for hang up Default ATH 495 Modem Retry Interval Time to wait for a retry 1f first call fails Default 5 value is in minutes 496 Modem Retry Interval Time to wait for a retry 1f all calls fail Default 1440 value is in minutes Mercor Mini AT Page 31 Mini AT Operators Guide The Scheduled Call In feature also requires the Mini AT to issue AT commands to a Messenger Modem This feature is designed to interface with third party software applications that can accept a sched uled call in from a remote site To use this method set the following items 333 Call in Trigger 334 Scheduled Call in date 335 Scheduled Call in time 339 Scheduled Call In Phone 486 Modem AT Enable 491 M
115. icate the amount of energy contained in each volumetric unit of corrected volume This value is a multiplier used to calculate Energy at 140 The nominal Gas Energy Values for the various Energy Units item 141 are listed below THERMS 1000 BTU per CuFt ofgas Default DKTHERMS 1000 BTU per CuFt of gas MJOULES 37259 00 Kilojoules per m3 of gas GJOULES 37259 00 Kilojoules per m3 of gas KILOCAL 8905 00 Kilocalories per m3 of gas KILOWATTHR 10349 73 Watt Hr per m3 of gas Mercor Mini AT Page 109 Mini AT Operators Guide Item No Item Name 143 PCORPRESS LOW ALARM 144 TEMPLOW ALARM Description This item 143 indicates 1f a low PCor pressure alarm was generated During a wake cycle if the measurement for item 008 PCor GAS PRESSURE is a value less than the value entered at item 011 PCor PRES LOLIM an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 143 00000000 at item 143 indicates there 15 no PCor Pressure Low Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled Also see item 105 The PCor Pressure Low Limit value item 011 is user selectable and is normally set somewhere between 0 and 50 of transducer range Default 00000000 This item 144 indicates if a low temperature alarm was generated During a wake cycle if the measurement for item 026 GAS TEMPERATURE is a value less th
116. idered a higher level access to all instrument functions and is gained through the use of alaptop computer Level 2 Access is also a software function using the instrument s companion software Mini AT Link or MasterLink32 The user must enter a five digit access code default 22222 at the computer s keyboard See Mini AT Link SOFTWARE USER S Guide for additional information on using Mini AT Link functions Level 2 Access permits instrument calibration and configuration Any instrument parameter may be displayed and changed When attempting to establish a serial link to the instrument the software will request the user to input a five digit Instrument Access Code This access code is necessary to maintain instrument security The default Instrument Access Code is 33333 This access code may be changed if desired when the user is at Level 2 Access While the instrument is in Level 2 Access the unit keeps track of incoming uncorrected pulses Corrected and uncorrected totals are updated when exiting Level 2 Access using values of pressure and temperature measured just before exiting pressures and temperatures applied during any calibration process are not used for any of the correction calculations or updating the LCD Note Be sure line pressure and temperature are restored before exiting Level 2 Access otherwise improper correction factors will be applied to any stored input pulses Page 46 Mercor Mini AT Mini AT Operators Guide
117. ific number of pulses to be transmitted out the printer port through a special adapter cable Page 26 Mercor Mini AT Mini AT Operators Guide Battery Cover B Slotted Screw A Numeric Display Ribbon Cable Spring Clip D Inside Case Door Figure 7 Case Door Battery Hanger Plate Battery Pack C Back Plate Inside Case Door Battery Cable Figure 8 Mercor Mini AT Page 27 Mini AT Operators Guide Installing or Changing Battery Packs Thestandard power supply forthe Mini AT is an alkaline receptacle pack 40 1865 forsix replaceable D cell batteries batteries not included The battery pack is mounted inside of the instrument s case door see figure 6 The expected service life of the battery pack is greater than three 3 years under normal use with considerable reserve to allow for battery replacement after the low battery alarm occurs Ifthe battery voltage drops below apreset value aBATTERY LOW alarm occurs When this alarm occurs the batteries or battery pack should be replaced Several optional power supplies are available for the Mini AT including lithium power pack 40 1447 disposable alkaline battery pack 40 1595 a line operated 120vAC to 9VDC power supply 40 1775 or Solar Power Two main board battery connections J7 amp J8 allow for changing the battery packs without removing electrical power from the unit As with any computer IT IS IMPORTANT NOT TO DISCONNECT POWER WHILE THE UNIT I
118. igtail connector into either modem socket J3 or J4 Lastly plug the power connec tor from the battery pack of power supply into the power sharing cable board At this point you should see the modem LED s flash during its five to ten second initialization process If the LED s do not flash press the white button on the power sharing cable board Place the power sharing cable circuit board in the instrument door to the right of the battery pack when viewed with the door open and place the cables in the battery wire clip so the board is toward the front surface of the door Note The Messenger Modem does not require the Power Sharing Cable Mercor Mini AT Page 35 Mini AT Operators Guide Alarms The LCD on the Mini AT s door will display decimal points between each numerical digit when the instrument has recognized an alarm Examples 0 0 0 4 5 6 7 8 00045678 CORRECTED VOLUME CORRECTED VOLUME MCF MCF LCD with alarms LCD without alarms Use a Mag Wand or push button to display the first alarm code onto the LCD Continue scrolling with the Mag Wand to display additional alarms if they exist After displaying the last alarm code continued use of the Mag Wand will cause the normal Meter Reader List to be displayed on the LCD Table 4 is a listing ofall alarms currently available from the Mini AT Clearing Alarms By default the Mini AT 1 configured to allow manually clearing of alarms using a Mag Wand This feature is enabled by se
119. is low The power sharing cable is a small electronic circuit board with two attached pigtail cables A battery socket is mounted on the circuit board and the two pigtails are terminated by battery plugs One plug is directly connected to the socket and supplies power to the instrument The other plug via the circuit board provides switched power for the modem Power is switched off if battery voltage drops below a preset level 5 25 volts dc and automatically restores if it rises above a higher level 6 40 volts dc The needs of the instrument dictate the battery voltage an which the modem must be disconnected Battery packs are affected by temperature and this complicates the process of deciding when to discon nect the modem A battery nearing end of life may reach the disconnection voltage on a cold night long before it cannot supply the modem during the day To maximize modem availability and to prevent nuisance shutoffs the power sharing cable automatically restores power to the modem when battery voltage returns to a acceptable level To prevent a continuous cycling of power retries a retry delay of about six hours is incorporated This delay is cleared or reset to zero whenever the battery is plugged into the cable but can also be ended by pressing the small white push button next to the red black wire Installation Plug the red black pigtail connector into either of the battery sockets J7 or J8 of the Mini AT Plug the white black p
120. ital an alarm 15 initiated and is indicated by placing dots on the LCD and 11111111 at item 104 00000000 at item 104 indicates there is no A D Converter Alarm The alarm indicators will remain active until manually cleared by software Unlike other instrument alarms an A D Fault is usually a hardware failure which requires component replacement on the main circuit board which is not a field repair unless the main board is replaced Default 00000000 If item 105 is programmed into item 072 073 or 074 this item 105 indicates if a high or low pressure alarm was generated During a wake cycle if the measurement for item 008 GAS PRESSURE is a value less than the value at item 011 PRES LO LIM or a value greater than the value at item 010 PRES HI LIM an alarm is initiated and 15 indicated by placing dots on the LCD and 11111111 at item 105 00000000 at item 105 indicates there is no Pressure Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 1s enabled Also see items 143 and 145 Default 00000000 Mercor Mini AT Item No 106 108 109 110 Mini AT Operators Guide Item Name TEMP OUT RANGE ALARMS OUTPUT FIXED PRESS FACT FIXED SUPER FACT Description If item 106 is programmed into item 072 073 or 074 this item 106 indicates if a high or low temperature alarm was generated During a wake cycle if the me
121. itch SW1 NO SW1 NO N C N C SW1 COM SW1 COM TB1 1 SW2 NO N C N C N C SW2 COM Cable Shield Cable Shield Form C SW1 NO SW1 NC SW1 COM TB1 1 SN TB1 2 TB1 3 TB1 4 TB1 5 TB1 6 3 5 m 5 D 5 J v 5 e rd PO TB1 5 1 2 SW2 NC TB1 6 1 3 SW2 COM TB1 7 Cable Shield Cable Shield Table 1 Wiring Connections for RSI Board Note NO Normally Open SWI Switch 1 NC Normally Closed SW2 Switch 2 N C No Connection TB1 Terminal Block 1 on RSI Board COM Commmon Page 24 Mercor Mini AT Mini AT Operators Guide 2 High Frequency Input Board The High Frequency Input Board HFI board p n 40 1913 must be installed when attempting to receive pulses from a high frequency meter Companion software and interface cable are available for configuring and testing the HFIB Refer to Table 2 below for information on selecting the proper jumpers and Table 3 next page for wiring connections when installing the HFI board For more information on the HFIB and its associated software please refer to the High Frequency Input Board Users Guide Note Two different board configurations are available and are factory configured The HFIB is configured to meet one of two groupings of gas turbine meters 1 3 Daniel Mini Gas This board has a 1 label on it 4 12 Daniel GTM This board has a 2 label on it
122. ivates the appropriate alarm item code turns on the alarm indicator and transmits an alarm pulse out the alarm channel After the alarm sequence is complete the microprocessor returns to its normal functions At the time of a full wake up if the battery Shutdown Voltage low limit item code 50 15 ex ceeded the microprocessor activates the alarm indicator all seven LCD decimal points are turned on transmits an alarm pulse on the alarm channel spells out the word HELP on the LCD Under these conditions the HELP message is displayed for as long as there is enough battery voltage to maintain the display The Mini AT is no longer correcting the gas volume however the mechani cal index is still functional To restore normal instrument operation remove the dead battery and replace it with a fresh one After the alarm subroutine is complete or if no alarm conditions are present the microprocessor computes new correction factors based on the new measurements and parameters already in memory Parameters in memory are items such as Base Pressure Base Temperature Specific Gravity etc The new correction factors are then applied to the uncorrected volume input to obtain the corrected volume The amount of corrected volume just calculated 1s then added to the totalized corrected volume stored at Item Code 000 The uncorrected volume just received 15 also added to the totalized uncorrected volume stored at Item Code 002 Mercor Mini AT Page
123. jumpers on JB30 shifted pins to the left 2 4 6 8 10 12 1357911 JB30 3 Install a shorting jumper at JB31 pin 1 2 L 2 3 JB31 4 Connect the wiring as shown below Channel B Channel Common Mercor Mini AT Page 39 Mini AT Operators Guide Configuring for Form C volume pulse output Jumpers JB29 JB30 and JB31 must be set correctly in order for the Mini AT to provide a single Form C pulse output Figure 9 will assist with locating these jumpers on the main board 1 Install shorting jumpers 40 2467 at JB29 pins 2 3 and 6 7 1234567 JB29 2 Install two 2 six position shorting jumpers at JB30 so that all six pins on the top row of pins are shorted together and all six pins on the bottom row are shorted together of pins JB30 2 4 6 8 10 12 135791 JB30 3 Install a shorting jumper at JB31 pin 2 3 12 3 JB31 4 Connect wiring as shown below Normally Closed Normally Open Common Note Pulse width for Form C pulses can be adjusted by changing Item Code 115 using MasterLink32 or Mini AT Link software Page 40 Mercor Mini AT Mini AT Operators Guide Output Pulse Specifications 1 All outputs are isolated from ground and each other 2 Outputs are rated for DC only from 3 0 volts to 30 0 volts Observe polarity 3 The corrected volume pulser circuits will sink up to 15 milliamperes DC for Form C outputs and up to 5 milliamperes DC for Form A outputs 4
124. lly numbered sequentially starting at zero Only changes that could affect Billing are recorded all other item changes are not logged Select 0 Unlocked Default 1 Locked Note Instruments shipped to Canada are factory set with the Event Logger LOCKED This item 163 indicates if a Corrected Volume Flow Rate alarm was generated During a wake cycle if the value at item 209 Instantaneous Flow Rate was greater than the value entered at item 164 Rate High Limit an alarm is initiated and is indicated by placing dots on the LCD and 11111111 at item 163 00000000 at item 163 indicates there is no High Flow Alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX item 165 is enabled This alarm can be disabled by setting the value at item 164 to its highest value of 99999 99 Default 00000000 Upper limit for High Flow Rate Alarm item 163 initiates an alarm if exceeded Default 99999 99 Mercor Item No 165 166 167 168 Mini AT Operators Guide Item Name RBX ALARM ENABLE PCOR PRESS DEAD BAND TMP DEAD BAND BATT DEAD BAND Description Code 0 1 to determine the type of instrument alarm operation When the RBX function Report By Exception is disabled all instrument alarms operate as in previous versions of firmware 1 alarms stay active until manually cleared When RBX is enabled instrumen
125. low for Corrected Volume 000 expressed in the selected CorVol units item 090 per hour The value is equal to the most recent increment of CorVol divided by the length of time between the last two correction cycles The minimum acceptable time between correction cycles is one minute If the meter is rotating faster than 1 RPM the calculation is delayed until the time is equal to or 1s greater than one minute When accessed the unit will display the most recently computed value Default 0 00 The highest INST FLOW RATE item 209 during the current time interval item 202 expressed in CorVol units 090 per hour Default 0 00 The largest amount of Corrected Volume measured over 1 hour period during the 24 hour gas day The 1 hour time periods are fixed consecutive hours i e 8 00 to 9 00 9 00 to10 00 10 00 to 11 00 etc They not moving 1 hour windows Default 00000000 The ending hour time for PEAK HOUR CORVOL item 211 Default 00 00 00 Date for PEAK HR END TIME item 212 Format Determined by item 262 Default 01 01 98 Highest PCor Gas Pressure item 008 measured during the Time interval selected at item 202 The value at item 214 is initialized re zeroed at the beginning of each new log interval Default 0 00 Mercor Mini AT Item 215 216 217 218 219 220 221 Mini AT Operators Guide Item Name PCORINTVLLOP INTVL HI TEMP INTVL LO TEMP INST DIAL RATE
126. lt 00000000 This item indicates if a PLog low pressure alarm was generated During a PLog sample Item 401 if the measurement for item 420 PLog GAS PRESSURE is a value less than the value entered at item 456 PLogPRESS LOLIM an alarm is initiated and is indicated by placing dots on the LCD 11111111 at item 452 00000000 at item 452 indicates there is no PLog pressure low alarm The alarm indicators will remain active until manually cleared by software or automatically when RBX is enabled The PLog Pressure Low Limit value item 456 is user selectable and is normally set somewhere between 0 and 50 of transducer range Default 00000000 High limit for PLog pressure initiates alarm item 451 if exceeded by item 420 Default 099999 99 Low limit for PLog pressure initiates alarm item 452 if higher than item 420 Default 0 00 A hysteresis band that provides a buffer below the PLog Pressure Hi limit item 455 and above the PLog Pressure Lo limit item 456 when alarms are automatically cleared by RBX operation The user specified value determines the magnitude of the band The PLog pressure measurement item 420 must pass completely through the dead band before the pressure alarm is automatically cleared Default 5 00 5 Mercor Mini AT Item No 460 461 482 486 491 492 493 494 495 496 497 Mini AT Operators Guide Item Name ZERO RATE DETECTION RAT
127. manually or automatically by RBX The Clear Alarm action will also provide an alarm output pulse and change item 176 RBX ALARM EVENT from 00000000 to 11111111 if item 165 RBX ALARM ENABLE is set to RBX Alarms code 1 Select 0 Inactive 1 Activated Default When activated this trigger will cause an audit trail entry to time stamp instrument Shutdown Select 0 Inactive 1 Activated Default This item provides an indication of RBX alarm activity since last interrogated It normally displays 00000000 and is internally set to 11111111 when any alarm becomes activate or is cleared It must be externally resetto 00000000 after each interrogation 1f needed to determine the status of future changes Default 00000000 The amount of time in hours an alarm pulse will be PERIOD retransmitted if the current alarm s have not been acknowledged read Setting this item to 0 will disable this feature Integer values only fractions are not allowed Range 0 to 24 Default 24 Yesterday s Daily Corrected Volume i e the daily corrected volume that is one Gas Day old at the time the instrument was accessed This information is updated with the value from item 223 at the beginning of every new gas day Note The gas day begins at the time entered at item 205 Default 00000000 Yesterday s Daily Uncorrected Volume i e the daily uncorrected volumethatis one Gas Day old at the time
128. ncorrected volume pulse output The uncorrected volume pulse is generated from a reed switch mounted on the input switch board as the magnet disc rotates past switch S3 on each meter revolution The uncorrected pulse may be wired as either Form A 2 wires or as Form C 3 wire at TB1 of the input switch board The value of each pulse as determined by the meter type and size Generally each pulse represents the amount of uncor rected gas flow during a single meter revolution The corrected volume pulse output is an electronic switch that operates much like an open collector transistor All Mini AT electronic pulse outputs including the alarm pulse incorporate opto isolators to electrically isolate the Mini AT circuitry from the devices receiving the pulses The volume pulse output can actually be user configured to output any of the listed pulse types e Corrected volume Uncorrected volume Pressure corrected volume Time Time can only be used with a Form A output to provide a reset switch at the top of each hour Use Mini AT Link software to select the pulse type at Item Codes 093 and 094 The Mini AT main board can be configured for either Form A or Form C volume pulse output Jump ers at JB30 and JB31 see Table 9 on page 73 determine whether a single channel Form C pulse output is available at terminals K Y and Z ofterminal strip TB1 oriftwo Form A channels are available at terminals amp amp Yb of terminal
129. neous Flow and Dial Rate calculations require two conditions to be satisfied before calculations can be made The first is at least two correction cycles have occurred and the second is that one minute must have elapsed If both conditions are not satisfied then the Instantaneous Flow and Dial Rates will remain constant until the next point at which the conditions are satisfied Zero Flow Calculation Based on the method described above the flow rate will not be able to indicate a flow rate zero A Zero Flow Detection algorithm has been developed Mini AT firmware 6 60 and higher to check for a zero flow condition This algorithm calculates the expected time for the next meter input from the average time between the five previous meter inputs added to the time period of the most recent consecutive switch input The Mini AT will wake up once a minute to check and see if the expec tation time has been exceeded If the expectation time is exceeded and there has not been a switch input the instantaneous dial and flow rates are set to zero The expectaion time can be scaled by changing a multiplier stored at item 460 The default value of item 460 is 2 Thus the expectation time would be scaled by a factor of 2 If Item 460 is set to zero the Zero Flow Detection calculation is disabled Page 58 Mercor Mini AT Mini AT Operators Guide Audit Trail The Mini AT records operational information on a user selectable interval At the beginning
130. ngle Point Temperature Calibration Defined 12 Use the mag wand to return the instrument to the Corrector Mode 13 Unplug the Field Calibrator cable from the main board connection J2 The above procedure compared the Mini AT s live temperature to the temperature of a calibrated thermometer If the readings are within tolerance the temperature calibration could be assumed sufficient However any ofthe above procedures should be subject to individual gas company policies Page 72 Mercor Mini AT Mini AT Operators Guide Main Board Jumpers The Mini AT has several features and functions that are controlled by installing jumpers on header pins Table 9 lists all main board jumpers with their factory default settings Jumper Jumper Default 246 810 12 LOADER not executed after reset 3 4 Defaults not loaded after unconfigured 5 6 Flash Upgrades permitted 7 8 Serial access limited by the selection at items 139 126 and 272 9 10 Prevent setting of Event Log Lock 1 2 not2 3 and 5 6 not 6 7 Sets pulse width of KYa and KYb to 62 5 milliseconds Other pulse widths can bg achieved by substituting shunt resistors 2 4 6 81012 1 3 5 and 2 4 6 Configures TB1 for 2 Form A pulse channels i e KYa and KYb O Note 1 3 5 7 9 11 and 2 4 6 8 10 12 configures for a single Form C channel 1 2 Selects input signal to pulse circuits as Form A Note 2 3 Selects input as Form C 1 2 Current limiting resis
131. ngle Point Temperature Calibration Defined Single Point Temperature Calibration Procedure Connectors Jumpers Correction Factorsto Metered Volume Pressure Factor Fp Temperature Factor Ft Supercompressibility Factor Fpv Drawing Installation for Div 1 UL Hazardous Locations Drawing Installation for Div 2 UL Hazardous Locations Drawing Installation for Div 1 CSA Hazardous Locations Drawing Installation with pulse output from Turbine Meter CSA Firmware Reprogramming HELP Mode Mercor Mini AT 36 58 28 28 28 29 29 60 61 61 61 63 63 65 66 67 68 70 71 13 13 13 14 144 146 147 149 77 36 Page 151 Mini AT Operators Guide How the Mini AT Works DriveInput PCor Pressure System PLog Pressure System Temperature System Supercompressibility Correction LCD Display and Scroll Function Computation Intervals Access Levels for Operating Personnel Installation Standard Meter Rotation To Change Rotation if necessary Installation without an Instrument Drive 1 Low Frequency Meter Pulse Input 2 High Frequency Input HFI Board HFI Software Meter Scaling HFI Software Pulse Generator Introduction Item Code List Jumpers Main Board Flash Access Override Jumper Force Factory Defaults Jumper Flash Access Security Jumper Serial Access Security Jumper Event Logger Lock Jumper Meter Reader Mode Detailed Description Gaining Access To Meter Reader Mode Default Meter Reader
132. ni AT Operators Guide Item Code List Items which make up the operating parameters codes alarms calibration references voltage levels and other information relative to operation or configuration of the Mini AT are listed below Item code information can only be changed using Mini AT Link or MasterLink32 software Refer to the Mini AT Link Software Manual for more information Item No 000 001 002 003 004 005 006 007 008 Item Name COR VOL PCORVOL UNC VOL COR VOL LO PRES COR VOL HI TEMP A NO OUT PULSES B NO OUT PULSES C NO OUT PULSES PCOR GAS PRESS Description Totalized Corrected Volume corrected to base conditions PT amp S Value is scaled to volume units selected at item 090 with the number of digits defined by item 096 Totalized Pressure Corrected Volume corrected to pressure base without supercompressibility P Value is scaled to volume units selected at item 091 with the number of digits defined by item 096 Totalized Uncorrected Volume Value is scaled to volume units selected at item 092 with the number of digits defined by item 097 UncVol should agree with the mechanical index if initially synchronized Totalized volume of gas metered at pressures lower than selected pressure low limit Item 11 corrected to base conditions Totalized volume of gas metered at temperatures above selected high limit Item 28 corrected to base conditions Number of P
133. o be governed by the selection of item 262 Select 0 MM DD YY Default 1 DD MM YY 2 YY MM DD Selection to determine how Audit Trail data is downloaded from the instrument Selecting 0 will download audit trail records the same as in the past 1 e when a snapshot of the Audit Trail item values were taken Selecting 1 will shift interval based values ex Item 225 Incremental Corrected Volume into the previous time log 1 e start ofthe interval Absolute values ex Item 000 Corrected Volume will remain in their original time log 1 e end ofthe interval This feature was added to allow incremental Audit Trail data consumption to be displayed at the time interval of its usage Select 0 End of Interval 1 Start of Interval Default The Mini AT incorporates jumpers on the main circuit board as another means of configuring some modes of operation Since the jumpers are physical entities they cannot be changed via software Item 268 provides a means of reporting which jumpers are installed at JB24 Normally default the only jumper installed at JB24 is across pins 5 amp 6 Other jumper may be installed if those particular features to be enabled see Table 4 Mercor Mini AT Item No 212 273 274 275 276 277 278 279 280 Mini AT Operators Guide Item Name MODEM BAUD RATE MAXFLOW RATE MAX FLOW TIME MAX FLOW DATE MAX FLOW PRESS HOUR CORVOL MAX HR
134. o indicate the End of List for Mag List 1 Default 002 Uncorrected Volume Item number of the third Mag List 1 item Any Mini AT item may be entered Entered a 255 at this item to indicate the End of List for Mag List 1 Default 000 Corrected Volume Item number of the fourth Mag List 1 item Any Mini AT item may be entered Entered a 255 at this item to indicate the End of List for Mag List 1 Default 255 End of List Item number of the fifth Mag List 1 item Any Mini AT item may be entered Entered a 255 at this item to indicate the End of List for Mag List 1 Default 255 End of List Item number ofthe sixth Mag List 1 item Any Mini AT item may be entered Entered a 255 at this item to indicate the End of List for Mag List 1 Default 255 End of List Code 0 3 to select if mag list items are to be identified by it s item code number If enabled the LCD will display the mag list sequence number 3 dashes and the item code number Examples 01 061 and 1 048 The left most digit s indicates the sequence number for either Mag List 1 Mag List 2 A 0 at the left most position indicates a Mag List 1 item a non 0 character indicates a Mag List 2 item The three right most digits indicate the item code number for the value to be displayed on the next mag wand input Note Live Gas Pressure and Live Gas Temperature do not have mag list identifiers as there are no item code numbers associa
135. odem Init String 492 Modem Dial String 494 Modem Hang up String 495 Modem Retry Interval A 496 Modem Retry Interval B 2 Scheduled Call in only desired date of call desired time of call Phone number to call at scheduled time 1 Call in viaAT commands Initialization command ofthe modem Default amp F Command sentto initiate dialing Default ATDT Command sent to modem for hang up Default ATH Time to wait for a retry if first call fails Default 5 value is in minutes Time to wait for a retry if all calls fail Default 1440 value is in minutes Note After each Scheduled Call in the date in item 334 must be changed to reflect the next desired call in date Otherwise the instrument will not call in again The Mini AT can also be configured to call in for both the scheduled and alarm case In order to configure the instrument for this method the following items must be set 333 Call InTrigger 334 Scheduled Call in date 335 Scheduled Call in time 339 Scheduled Call In Phone 486 Modem AT Enable 491 Modem Init String 492 Modem Dial String 493 Alarm Call In Phone 494 Modem Hang up String 495 Modem Retry Interval 496 Modem Retry Interval B Page 32 3 Alarm amp Scheduled Call in desired date of call desired time of call Phone number to call at scheduled time 1 Call in viaAT commands Initialization command of the modem Default amp F Command sent to initiate dialing Defaul
136. on is not pressed no change will take place and the field calibrator can be removed without any change to the calibration When the ENTER button is pressed the microprocessor will recalculate a new Temperature Zero parameter and update Item Code 035 to the new value as described in step 9 of the 2 point calibration This digital calibration technique has advantages over an analog calibration since the linearization information 15 included in the recalculation and the transducer s zero offset item 035 is stored in memory for future reference There are several points that need to be understood when using the single point calibration method 1 Attempt a single point calibration only after the initial factory calibration or a subsequent 2 point calibration It is necessary to establish a valid T Zero and T Span parameters beforehand 2 Oncethe T Span value fora given temperature probe is determined this value will vary only slightly if at all during the functional life of the temperature probe 3 Any and all temperature readings within the instrument s range may be viewed and adjusted The adjustments made with the Field Calibrator are not limited by the Excess Change value at item 042 4 When any live temperature reading is adjusted using the field calibrator the amount of change offset is applied to the instrument s entire temperature range 5 Iftwo or more live temperature readings preferably separated by at least 10 of the transduce
137. or 173 175 If any Report Trigger s is deactivated that particular type of an event trigger will not appear as a time stamped record in audit trail memory Select 0 Inactive 1 Activated Default The highest hourly CORVOL of the current Gas month Default 00000000 The date the current month Peak Hour CORVOL 243 occurred Format Determined by item 262 Default 01 01 98 Ending hour for the current month Peak Hour CORVOL Date 244 Default 00 00 00 The highest Daily CORVOL item 223 ofthe current Gas month Default 00000000 Mercor Mini AT Mini AT Operators Guide Item No Item Name Description 247 MOPKDAY DATE The date the current month Peak Day CORVOL 245 occurred Format Determined by item 262 Default 01 01 98 248 PREMO PK HR CRVL The highest hourly CORVOL of the previous Gas month Default 00000000 249 PREMO PK HR DATE The date the previous month Peak Hour CORVOL 248 occurred Format Determined by item 262 Default 01 01 98 250 PREMO PK HR TIME Ending hour for the previous month Peak Hour CORVOL Date 249 Default 00 00 00 251 PREMO PKDAY CRVL The highest Daily CORVOL item 223 ofthe previous Gas month Default 00000000 252 PREMO PKDAY DATE The date the previous month Peak Day CORVOL 251 occurred Format Determined by item 262 Default 01 01 98 253 MAX DAY CORVOL The highest Daily CORVOL item 223 since last manually reset Default 000000
138. pan Calibration Default 1 0000 The previous value of item 417 updated on each PLog Pressure Span Calibration Default 1 0000 The upper PLog pressure limit automatically scaled to the pressure units selected at item 408 If PSI is the selected pressure units then item 419 will be the same as item 412 Note the value at item 419 may be manually edited to a rounded off number if desired Default 100 00 PLog gas pressure measured at the last wake up The pressure value is scaled to the unit of pressure measurement selected at item 408 and displayed with the appropriate number of decimal positions as selected at item 420 Mercor Mini AT Item 421 422 423 426 427 428 429 430 431 Mini AT Operators Guide Item Name PLOG AVG PRESS INTVL PLOG P HIGH INTVLPLOGPLOW PLOG MAX PRESS PLOG MAX PRESS TIME PLOG MAX PRESS DATE PLOG MIN PRESS PLOG MIN PRESS TIME PLOG MIN PRESS DATE Description Calculated PLog average pressure for the time interval selected at item 202 The average value is time weighted over the PLog SAMPLE INTERVAL selected at item 401 Default 0 00 Highest PLog Gas Pressure item 420 measured during the Time Interval selected at item 202 The value at item 422 1 initialized re zeroed at the beginning of each new log interval Default 0 00 Lowest PLog Gas Pressure item 420 measured during the Time Interval selected at item 202 The value at item 4
139. perature deg R Pressure Factor Fp The pressure factor Fp to apply to metered volume is expressed by the Boyle s Law relationship as follows Pm Meter pressure PSIG atmospheric pressure PSIA Fp De X nsm r Pb Base pressure PSIA Each increment of meter pressure represents a different pressure factor As the flowing gas pressure Pm changes the Mini AT automatically applies the pressure factor Fp to the metered volume Vm Temperature Factor Ft The temperature factor Ft to apply to metered volume is expressed by the Charles Law relationship as follows Tb Base temperature deg 459 67 Ft Tm Meter temperature deg F 459 67 Each increment of meter temperature represents a different temperature factor Therefore as the flowing gas temperature Tm changes the Mini AT automatically applies the temperature factor Ft to the metered volume Mercor Mini AT Page 13 Mini AT Operators Guide Supercompressibility Factor Fpv Gases actually behave in a manner slightly different from what the ideal gas laws indicate This deviation depends on the molecular composition of the gas and the specific gravity as well as the pressure and temperature Natural gas for instance compresses by a greater amount than that computed by Boyle s Law and hence the term supercompressibility is used for this deviation Itis small at very low pressure but becomes
140. r 6 Connect a standard serial cable from the Mini AT serial connector to a computer serial port Warning Connections to the RS 232 port are Mini AT permitted only in non hazardous locations Back View Pressure Connector Laptop Computer RS 232 Port Serial Port i e COMI 2 I O Cable P N 40 1629 Optional 2nd Pressure Connector Plug for future expansion 7 Run MasterLink32 software and use the Set Instr Date Time via Computer selection in the File Menu to set the date and time in the instrument Com Port and baud rate may need to be set for the Computer Serial Port Default baud rate is 9600 8 Use MasterLink32 to verify that company and site specific items are set properly especially item 98 Meter Index Code 9 Use the Disconnect Link function in the Instrument menu to return the Mini AT back to corrector mode Remove the I O cable from the back of the instrument 10 Position the Mini AT on the meter making sure that the wriggler is aligned properly Bolt the Mini AT to the meter using the mounting bolts and gasket provided 11 Verify the Test Hand rotates in the clockwise direction If not remove the black mechanical index Mercor Mini AT Page 11 Mini AT Operators Guide assembly and shift the lower bevel gear to the proper location Bevel Gear DOWN for CW Bevel Gear UP for CCW 12 Connect the pressure line to the 1 4 NPT fitting at the back ofthe instrument Mini A
141. r A valve kit with shut offvalve tubing and fittings is optionally available to make the PLog pressure connection to meter pipeline A plug in cableisusedto make the connection from the PLog pressure transducer to the main circuit board at J26 This transducer allows the logging ofa2nd pressure whichis initiated by atime interval not volume set by item 401 Itis usually used to monitor the upstream or downstream pressure Temperature System The temperature system consists of a highly stable solid state transducer connected to the Mini AT througha 6 foot length ofarmored conductor The stainless steel probe is 1 4 diameter by 9 inches long and is provided with aslip along fitting forthe matching thermowell in the meter piping Page 16 Mercor Mini AT Mini AT Operators Guide Supercompressibility Correction Supercompressibility correction is included in the basic calculations if Item Code 110 is configured to LIVE Specific gravity item 053 mol percent of N item 054 and mol percent of CO item 055 should be updated by the user so that the Mini AT can provide accurate and continuous correction for the specified gas composition based on actual sensed pressure and temperature Below is a partial listing of various Mini AT Item Codes that store correction parameters Most Interval Daily Previous Day Current Average Average Average 256 257 Super Fpy M6 LCD Display and Scroll Function Asin
142. r range compare to a reference temperature the Mini AT s temperature system can be considered calibrated 6 If one or several live temperature checks do not compare to the reference temperature a Make certain the reference temperature is accurate b Calibrate the instrument s temperature system using the Single Point Calibration method if an offset adjustment is adequate c Calibrate the instrument s temperature system using the 2 Point Calibration method if a span error must be corrected Page 70 Mercor Mini AT Mini AT Operators Guide Field Calibrator Front View with Door Ajar Calibrated Thermometer Temperature Probe Fig 22 Single Point Temperature Calibration Single Point Temperature Calibration Items Required Mini AT Mercor Mini Field Calibrator p n 20 8360 Calibrated Thermometer Mag Wand p n 20 7286 Single Point Temperature Calibration Procedure Referto figure 22 during the single point calibration procedure Before starting the procedure unlock and open the Mini AT s door Locate connector J2 near the top center of the main circuit board 1 Plug the Mercor Mini Field Calibrator cable onto the main circuit board connector J2 Make certain all six pins are fully inserted into the black plastic cable connector The cable connector is angled to prevent the connector from being plugged in upside down 2 Use a mag wand to scroll to the Live Temperature display of the Meter Reader List 3 Whil
143. r Mini AT Mini AT Operators Guide D TOR D E ia ui WAND E OUTLINED ia ui E ie d 12 8 8 8 8 8 8 8 8 01 200 gt gt 12345678 1 MINUTE TIME OUT 02 000 WAND 00082417 WANDD Tes SUTIN TIME OUT 03 002 00593296 WAND TIME OUT 60 47 10 TIME OUT 45 42 10 MINUTE MAG WAND TIME OUT 1 009 mac WAND MAG WAND 1 MINUTE m TIME OUT 1 MINUTE IA TIME OUT MAG WAND MAG WAND MAG WAND MAG WAND 1 MINUTE RN TIME OUT MAG WAND 4 WAND 1 MINUTE Fig 18 Meter Reader List For Example 4 Mercor Mini AT Page 57 Mini AT Operators Guide Flow Rate Calculations The Mini AT calculates corrected and uncorrected gas flow rates There are two types of calcula tions made for corrected and one type for uncorrected volume The calculations are Average Flow Rate Item 208 the average amount of corrected volume flow per Log Interval Item 202 expressed in Cor Vol Units Item 090 per hour Instantaneous Flow Rate Item 209 the instantaneous amout of corrected volume flow expressed in Cor Vol Units Item 090 per hour Instantaneous Dial Rate Item 218 the instantaneous amount of uncorrected volume flow expressed in cubic foot per hour Note Instantaneous Rates are based on the duration of time between the last two input pulses The Instanta
144. r Mini AT Page 99 Item 093 094 095 096 097 098 Mini AT Operators Guide Item Name PULSR A VOL CODE PULSR B VOL CODE PULSR C VOL CODE COR VOL DISP RES UNC VOL DISP RES METER INDEX CODE Page 100 Description Code 0 4 that selects the type of pulse information to be transmitted out Pulser Channel A Code 0 4 that selects the type of pulse information to be transmitted out Pulser Channel B Code 0 4 that selects the type of pulse information to be transmitted out Pulser Channel C Possible selections for items 093 094 and 095 Select 0 COR VOL 3 NO OUTPUT Default 1 PCor VOL 4 TIME 2 UNC VOL Code 0 4 that selects the number of digits out of eight to be blanked on the left side of the corrected volume display item 000 Example Select 0 NOBLANKS Default 12345678 1 1 BLANK 2345678 2 2BLANK 345678 3 3BLANK 45678 4 ABLANK 5678 Code 0 4 that selects the number of digits out of eight to be blanked on the left side of the uncorrected volume display item 002 Example Select 0 NOBLANKS Default 12345678 1 1 BLANK 2345678 2 2BLANK 345678 3 3BLANK 45678 4 ABLANK 5678 Code 0 8 that selects the value of each uncorrected input pulse The selection should agree with the gas meter drive rate i e the amount of uncorrected volume per output shaft rotation or meter pulse Select 0 1 CF 5 1m3 1 5CF 6 1 m3 2 10 CF Default 7 10 m3 3 100 CF 8 1
145. rLink32 first select Pressure then a box will appear for selecting PCor or PLog If a communications link has not yet been established the software will attempt to link to the Mini AT Ifthe access code of the Mini AT is not the default of 33333 a box will appear requesting the user to input the Instrument Access Code Enter the access code when this box appears With zero pressure applied to the selected pressure transducer perform the Pressure Zero Calibration The pressure displayed in green on the computer s screen is a live reading This permits the user to determine if the pressure has stabilized so that a sample may be obtained Click the Average Pressure Now button when it becomes active text changes from gray to black to obtain a sample of the applied pressure Obtain the current local atmospheric pressure reading using a barometer or by some other means When Mini AT Link displays the absolute Average Pressure the value should be changed to match the current atmospheric pressure reading by clicking the Change button when it becomes active Enter the current atmospheric pressure value and then click making sure the units are comparable i e PSIA The Mini AT will calculate the required difference offset store this calculated value at Item Code 017 or 414 display the new value for item 017 414 and the previous value at item 018 or 415 before returning to a live absolute pressure reading
146. range Pressure Reference accuracy to equal or exceed the accuracy or the Mini A T s pressure system Computer IBM Compatible Mini AT Link Software or MasterLink32 cable p n 40 1629 Barometer 2 Point Pressure Calibration Procedure Absolute Transducers Make certain that the Pressure Compensation Coefficient listed in item codes 301 through 332 341 through 372 for PLog are for the pressure transducer installed Also verify that Item Code 087 or 408 is the desired pressure unit Item Code 138 or 411 matched the transducer serial number label and Item Code 112 or 407 is for Absolute type transducer Refer to figure 19 when pressure calibrating the Mini AT Sincethe two point calibration is mostly a software function references to the appropriate sections in the Mini AT Link and MasterLink32 software are included 1 2 3 4 3 6 7 8 9 Connect a pressure source and pressure reference to the selected Mini AT pressure connector PCor or PLog Using serial cable p n 40 1629 connect from the computer s serial port to the Mini AT s RS 232 port Start Mini AT Link or MasterLink32 software on the computer Enter the access code for Level 1 or Level 2 when requested The default Level 1 Access Code is 11111 the default Level 2 Access Code 1 22222 Select Calibrate from the main menu Select PCor Pressure Calibration or PLog Pressure Calibration from the sub menu Note In Maste
147. rating temperature range and are unique for each pressure transducer regardless ofthe pressure range The coefficient values are determined by Mercury Instruments at the factory Note A Mini AT will not measure pressure accurately if the default coefficients are used Page 130 Mercor Mini AT Item 333 334 335 338 339 Mini AT Operators Guide Item Name CALL IN TRIGGER SCH CALL IN DATE SCH CALL IN TIME SCH CALL IN ALARM SCH CALL IN PHONE Description Selection to determine what activity will cause an instrument call in Select 0 No Call in 1 Alarm Call in only Default 2 Scheduled Call in only 3 Alarm amp Scheduled Call In Date of next scheduled call in This must be reset by the host software after each call Default 01 01 00 Time of next scheduled call in Can be reset by host software or reused for next call in Default 01 00 00 Status of scheduled call in activity 11111111 indicates call in activity since last interrogation and intended to be reset to zero after each read 00000000 indicates no activity since last interrogation Default 00000000 Phone number used for scheduled call in Mercor Mini AT Page 131 Mini AT Operators Guide Item No Item Name Description 341 PLOGCOMP COEFF 1 Default 0 000000 342 COEFF 2 Default 30 00000 343 COEFF 3 Default 0 000000 344 PLOGCOMP COEFF 4 Default 0 000000 345
148. rcor M 9 21 Y n 7 1801 A8 ddy SNOILVOO SNOQYYZYH YSO NOLLVTIVISNI ININ MOOM3N SLNANNYLSNI AMOOMN3N JOA 5 A9S3N3 NON gAuSIS3H SAISSWd 38 LSNW 1 HOLIMS 310W38 H3HI3901 SIVNIWH3L ONY 1 WNIWH3L OL Q3Sn SI HOLIMS 303 3l y SWNIWH3L ISN HOLIMS 303 WHO HilNv3 SNOILVOINDWIWOOS 310W34 53531398 751 Operators Guide ini M Sa3lHeVa AO 20194 LHVd NOILVOO1 SNOGHVZVH NON 9102 0 l ndNI WJLLIWSNVHI 3S nd HOLIMS 31O0W33 ZLZ OLZ 7300W YOLOAYYOD SWNIOA SVS ININ YOOUAN YOLOANNOOS 3Sv2 TWNOILdO lt LINDYIO 7291335 Qavogs CANO 1v INIW 2991 lt 261 8 1 0 ZAM vNOILdO JOA ONINOLS ADYINI NON 3 151539 3NSSVd V 38 LSNW 1ndNI HOLIMS 310N3M 310N ININ ININ YOOYUSN 2161 07 31033 9 2 5 Ald I 55 19 201 ShOQNVZVH NON 1 SNOGYVZVH Mercor Page 148 AT Operators Guide Inl M AV INIW 3aivaan NDI V21 3Il232 ELET NO Odd VSO H313 ININ OO
149. red asleep state When the magnet disc rotates and actuates the input switches the electronics are energized and begins its correction cycle The input switches not only wake up the electronics but are also the input for uncorrected volume The volume that each input closure represents is defined by Item Code 098 multiplied by the scaling value at Item Code 114 Once the instrument wakes up the computer program in firmware instructs the CPU microproces sor to obtain analog measurements At least five analog signals PCor gas pressure gas tempera ture main battery voltage memory battery voltage and case temperature are multiplexed through the A D converter and sent to the microprocessor for processing The microprocessor converts the digitized analog signals to an equivalent numeric value and stores this information in memory PCor Gas Pressure is stored at Item Code 008 Gas Temperature is stored at Item Code 026 Main Battery Voltage is stored at Item Code 048 Backup Battery Voltage is stored at Item Code 051 and Case Temperature is stored at Item Code 031 After all measure ments are obtained the microprocessor compares the measured values to the parameter limits already in memory 1 PCor pressure low limit temperature high limit battery low limit etc If any of the measured parameters are out of range the microprocessor jumps to an alarm subroutine Except for battery Shutdown Voltage limit exceeded the alarm subroutine act
150. rrector Mode Pressure Function Check Absolute Pressure Transducer Use a mag wand to scroll through the Meter Reader List and stop at the live pressure display With no pressure connected the LCD will display a value very close to the local atmospheric pressure typically within plus or minus 0 2 of full scale To check the pressure measuring system apply some amount of pressure but less than the full range of the transducer and observe as the LCD value increases There is a 10 minute time out before the instrument automatically reverts back to the Corrector Mode Use the mag wand and scroll through the remaining items until the instrument returns to the Corrector Mode Temperature Function Use a mag wand to scroll through the Meter Reader List and stop at the live temperature display The LCD will display a value very close to ambient temperature typically within plus or minus 0 5 degrees F To check the temperature measuring system grab the temperature probe near its tip and observe as the LCD value increase There is a 10 minute time out before the instrument automatically reverts back to the Corrector Mode Use the mag wand and scroll through the remaining items until the instrument returns to the Corrector Mode Mercor Mini AT Page 19 Mini AT Operators Guide Volume Function Check Whileinthe Corrector Mode notethe corrected volume reading on the LCD Rotatethe index input wriggler in one direction forten 10 revolutions Verify t
151. s live pressure to the pressure on acalibrated pressure gauge at two different pressure points An alternative would be to check the pressure at line pressure only If the readings are within tolerance the pressure calibration could be assumed to be sufficient However any of the above procedures should be subject to individual gas company policies 2 Point Temperature Calibration Defined A 2 Point temperature calibration requires that two different temperatures be applied to the instrument s temperature probe and be sampled by the data acquisition circuits A low temperature source usually an bath 32 degrees F is used to determine the Temperature Zero Calibration A higher temperature source is used to determine the Temperature Span Calibration gain The default Calibration Parameters require the Span Temperature exceed the Zero Temperature by at least 10 of the instrument s temperature range The temperature probe provides a nonlinear but very predictable temperature response for all rated temperatures The instrument s firmware contains the required information to produce a linear temperature response for any connected temperature probe The 2 point calibration process uses the temperature offset and temperature span values to adjust for individual sensor variations Once these two points have been calculated and stored into memory all other applied temperatures can be determined by a linear interpolation Mercor Mini AT Page 67
152. s of the ECAT hence the name Mini AT A PC desktop or laptop computer is needed to configure and download the Mini AT using Mini AT Link or MasterLink32 software Detailed information regarding the software 15 avail able through the Mini AT Link Software Users Manual or through the MasterLink32 help screens In addition to its small sturdy case the Mini AT offers these and other features High performance low power microprocessor Extended battery life Extended Audit Trail memory capacity 140 days of hourly FLASH memory hence no plug in EPROMs Firmware updates via serial port Jumper selectable Form A or Form C pulse output Jumper selectable Pulse Widths for volume pulses Dual serial ports local and modem with independent baud rate settings High speed data transfers up to 38 4 kbaud On board surge protection for serial amp pulse data On board connectors for a second pressure amp temperature transducer Logging of a 2nd pressure for monitoring pressure Call In via Alarm Pulse or AT commands Mercor Mini AT Page 5 Mini AT Operators Guide Specifications Input Volume Dual Dry reed switches one pulse per each meter revolution Uncorrected volume totalized on mechanical index also displayable on LCD Input pulse counting continues with dead or removed main battery Input Pressure Precision strain gauge pressure transducer compensated to minimize ambient temperature effects Standard Trans
153. s the magnitude ofthe band The battery voltage measurement item 048 must pass completely through the dead band before the battery low alarm is automatically cleared Default 1 00 Volt Mercor Mini AT Page 113 Mini AT Operators Guide Item No Item Name 169 RATE DEAD BAND 170 PROTOCOL CODE A 171 TIMEOUT DELAY 172 TIMEOUT DELA Y2 173 REPORT TRIGGER 9 Page 114 Description A hysteresis band that provides a buffer below the Rate High Limit item 164 when the Rate High Alarm is automatically cleared by RBX operation The user specified value determines the magnitude of the band The flow rate calculation item 209 must pass completely through the dead band before the flow rate alarm is automatically cleared Default 2 xyz HR Where xyz the CorVol unit selected at item 090 Selection 0 1 to determine if a specific Mercury Protocol error code is transmitted while attempting a serial link sign on When this function is set to 0 which is the recommended setting for most applications all instrument error codes are transmitted as in previous versions of firmware When this item is set to 1 the Mini AT will not send time out errors during serial communications The selection of 1 is provided as a convenience for some 3rd party communication interfaces Select 0 Standard Default 1 No Time out Error The time in seconds the Mini AT waits for the host computer to send the protocol
154. s to the right of decimal point for item 008 and other pressure related items Select x xxxxxxx 1 2 Default 3 4 Mercor Mini AT Operators Guide Item No Item Name 089 TEMP UNITS CODE 090 COR VOLUN CODE 091 PCOR VOL UN CODE 092 UNC VOL UN CODE To properly use selections 15 20 at item 090 the appropriate energy factor must be manually placed into item 142 Gas Energy Value Description Code 0 3 that selects the unit of measure for Gas Temperature 026 and other temperature related items Select 0 Degrees Default 1 Degrees 2 Degrees R 3 Degrees Code 0 20 that selects the unit of measure for Corrected Volume 000 and other CorVol related items Default 8 MCF Code 0 20 that selects the unit of measure for Pressure Corrected Volume 001 Default 8 MCF Code 0 20 that selects the unit of measure for Uncorrected Volume 002 and other UncVol related items except Inst Dial Rate 218 and Peak Dial Rate 219 which are always expressed in cubic feet per hour Default 7 CCF Possible selections for items 090 091 and 092 0 CUFT 11 m3x10 1 CU FTx10 12 m3x100 2 CUFTx100 13 m3x1000 3 CF 14 CFx10000 4 CFx10 15 THERMS 5 CFx100 16 DKTHERMS 6 CFx1000 17 MJOULES 7 CCF 18 GJOULES 8 MCF 19 KILOCAL 9 m3x0 1 20 KILOWATTHR 10 m3 Merco
155. screws Figure 3 Figure 4 Bevel Gear DOWN for CW Bevel Gear UP for CCW Page 22 Mercor Mini AT Mini AT Operators Guide Installing a Mini AT without an Instrument Drive The Mini AT can be configured to accept low frequency meter input pulses directly from a meter or Model 210 212 pulse transmitters or any other low frequency pulse source if a RSI board is installed Alternatively the Mini AT can be configured to accept high frequency pulses from turbine meters input but requires the High Frequency Input Board HFI Board instead ofthe RSI board see Figure 6 1 Low Frequency Meter Pulse Input The Remote Switch Interface Board RSI board p n 40 2016 must be installed if the Mini AT 15 to receive input pulses from a Model 210 Model 212 Pulse Transmitter or a low frequency pulse from a gas meter Figure 5 below and Table 1 on the next page provide wiring information for the RSI and Pulse Transmitters To Mini AT main board J9 amp J4 use Y cable 40 1939 amp ug To Model 210 or 212 Pulse Transmitters or pulse output from gas meter Figure 5 RSI Board Continued on the next page Mercor Mini AT Page 23 Mini AT Operators Guide Form A Terminal Single Switch Dual Sw
156. se of a jumper selection at JB24 pins 5 and 6 To upgrade flash memory use the software application Firmware Manager Items Required a PC with Windows 95 98 OS or higher Firmware Manager software FWUM version 1 0502 or later Install Firmware Manager on your computer using the following steps Insert the 3 1 2 floppy containing Firmware Upgrade Manager disk 1 into your computer floppy drive Click the windows Start button and select Run from the Start Menu In the run box type in A setup exe The screen will display Firmware Manager Setup At the bottom ofthe screen will bea dialogue box to choose the installation drive default is C Select the drive letter you wish to install to and press continue Setup will begin to install the files for Firmware Manager from disk 1 After disk 1 is complete setup will prompt for disk 22 Insert disk 2 and continue the installation Atthe end ofthe installation there will be a message stating that the installation is complete Atthis point setup will give you the option of restarting the computer to update the system Select Yes to update the system and restart the computer a MasterLink32 software version 3 30 or later a RS 232 serial I O cable p n 40 1629 aMini AT Firmware file maxX XXXX mmf or maxX XX XX mmx a Mini AT Mainboard p n 40 2335 Mercor Mini AT Page 77 Mini AT Operators Guide Before Upgrading Firmware saving instrument data 1
157. separately and must be installed on the inside of the case door Mount the main battery pack and plug in the battery cable connector at either J7 or J8 The memory back up battery should already be mounted near the center right side ofthe main board see figure 9 on page 28 Plug in the memory battery cable connector at J26 At this time the Mini AT should be displaying digits on the LCD probably all zeros and the unit 1s ready for functional checks Note ofthe function checks assumes that the instrument is configured with default parameters The default configuration has assigned a commonly used Meter Reader List Pressure Temperature and Volume Units Alarm Limits etc If the Meter Reader List or instrument configuration is something other than the default most checks can still be performed but the results may vary slightly Pressure Function Check Gauge Pressure Transducer Use a mag wand to scroll through the Meter Reader List and stop at the live pressure display With no pressure connected the LCD will display a value very close to zero typically within plus or minus 0 2 offull scale To check the pressure measuring system apply some amount of pressure but less than the full range ofthe transducer and observe as the LCD value increases There is a 10 minute time out before the instrument automatically reverts back to the Corrector Mode Use the mag wand and scroll through the remaining items until the instrument returns to the Co
158. ss code at the computer s keyboard to gain software access the default code is 11111 See Mini AT Link SOFTWARE USER S Guide for additional information on using Mini AT Link functions Level 1 Access permits instrument calibration for pressure and temperature A limited number of parameters may be displayed and changed if authorized Also Audit Trail downloads Event Log downloads Alarm Log Downloads and Alarms viewing and clearing are possible if authorized When attempting to establish a serial link to the instrument the software will request the user to input a five digit Instrument Access Code This access code is necessary to maintain instrument security The default Instrument Access Code is 33333 This access code may be changed if desired but requires Level 2 Access While the instrument is in Level 1 Access the unit keeps track of incoming uncorrected pulses Corrected and uncorrected totals are updated when exiting Level 1 Access using values of pressure and temperature measured just before exiting pressures and temperatures applied during any calibration process are not used for any of the correction calculations Note Be sure line pressure and temperature are restored before exiting Level 1 Access otherwise improper correction factors will be applied to any stored input pulses Level 2 Access Mode The Level 2 Access Mode allows the factory or the user to configure the Mini AT instrument Level 2 Access is cons
159. stalled Default 0 The value also increments during all user accesses and other actions based on the equivalent wake cycles listed below Action Wake Cycles approx 1 meter revolution 1 1 Audit Trail Log Entry 27 1 minute of Serial Link 1435 1 minute of Meter Reader 9137 66 Form A pulses 1 Ch 14 240 Form C pulses 1 Ch 14 Midnight roll over each day 6200 A high limit for the number of wake up cycles accumulated Initiates an alarm item 100 when exceeded Intended as early warning to change out the main battery pack If a DCPS is installed set item 060 to a value of 0 to disable the alarm feature Also reset item 049 to a value of 6 75 volts Default 15 000 000 Alkaline Battery Pack 40 000 000 Lithium Battery Pack 0 DCPS A test pattern that displays all segments and decimal points of the LCD numeric display By default item 061 is the first item programmed into Mag List 1 This insures that the LCD status is viewed prior to displaying item values Example 8 8 8 8 8 8 8 8 Mercor Mini AT Page 95 Item 062 063 064 065 066 067 068 069 070 Mini AT Operators Guide Item Name SERIAL NUMBER PCOR MIN PRESS GAS TEMP MAX GAS TEMP MIN PULSER A LIMIT PULSER B LIMIT PULSER C LIMIT PULSER A ALARM PULSER B ALARM Page 96 Description Factory assigned Instrument Serial Number Example 09901234 09901234 disregard the leading zero 09901234 2
160. strip TB1 Additionally JB29 is used to configure the pulse width for Form A pulses Unless otherwise specified the Mini AT is configured for Form A pulse output Shorting jumpers are installed on JB29 to provide a pulse width of 62 5 milliseconds having a period of 125 milliseconds Other pulse width durations are available by moving the shorting jumpers and replacing them with shunt resistors Page 38 Mercor Mini AT Mini AT Operators Guide Configuring for Form A volume pulse output Jumpers JB29 JB30 and JB31 must be set correctly in order for the Mini AT to provide a Form A pulse output Figure 9 will assist with locating these jumpers on the main board Install shorting jumpers at JB29 pins 1 2 and 5 6 to obtain pulse widths of 62 5 milliseconds or substitute with shunt resistors to obtain other pulse width values The value of the shunt resistor determines the pulse width of the Form A output The chart below lists the shunt resistors available and the pulse width for each Item 115 will also need to be changed accordingly See Table 6 on page 44 Form A pulse width part Jumper description 62 5 milliseconds 40 2467 shunt jumper 125 milliseconds 40 2468 125 mS resistor assembly 250 milliseconds 40 2469 250 mS resistor assembly 500 milliseconds 40 2470 500 mS resistor assembly 1 0 second no jumper 1 Install shorting jumpers 40 2467 at JB29 pins 1 2 and 5 6 12 345 67 JB29 2 Install two 2 six position shorting
161. strument technician during the most recent calibration of an absolute pressure transducer Default 0 0000 Base pressure per the contract used in calculating pressure correction factor item 044 Default 14 7000 Average atmospheric pressure per the contract used in calculating pressure correction factor item 044 when a gauge transducer is installed item 112 Gauge This value is ignored if an absolute transducer is installed item 112 Absolute Default 14 7000 The pressure value used during the most recent PCor ZERO calibration Default 0 00 The pressure value used during the most recent PCor SPAN calibration Default 0 00 The most recent offset value for the pressure transducer obtained during a PCor Zero calibration The value is normally very close to 0 0000 and is recalculated during each PCor Pressure Zero Calibration Default 0 0000 The previous value of item 017 updated on each PCor Pressure Zero Calibration Default 0 0000 Mercor Mini AT Item 019 020 021 022 023 024 025 026 027 Mini AT Operators Guide Item Name 2 PREV PCOR CAL ZERO PCOR CAL SPAN 1 PREV PCOR CAL SPAN 2 PREV PCOR CAL SPAN MIN PCAL PT DIF XCESS PCAL CHNG Description The previous value of item 018 updated on each PCor Pressure Zero Calibration Default 0 0000 The most recent span value for the pressure transducer obtained during a PCor Span calibration T
162. substantial as the pressure increases Mini AT automatically applies the supercompressibility factor and therefore the equation for total volume correction which the Mini AT applies to metered volume is expressed as Vb Vm x Fp x Ft x Where Vb volume corrected to base conditions Vm metered volume read from the meter index Fp pressure factor Ft temperature factor supercompressibility factor determined from AGA 3 NX 19 or AGA 8 from the AGA Manual for Determina tion of Supercompressibility Factors for Natural Gas The values of Fpv are derived in the tables for use with orifice meters which are square root function measurements So the flow equation for linear volume meters must square the value of Fpv The Mini AT automatically squares the supercompressibility factor displayed which is based on the pressure and temperature sensed at the meter The resulting volume readout is corrected for pres sure temperature and supercompressibility Page 14 Mercor Mini AT Mini AT Operators Guide How the Mini AT Works The Mini AT is a dedicated microcomputer that uses precision sensors to measure gas pressure and temperature and corrects metered volume The electronic circuits are powered by the battery pack located in the case door The battery voltage is regulated to the various voltages required by the remaining circuits While in the Corrector Mode most of the electronic circuitry is in an unpowe
163. t ATDT Phone number to call for alarm Command sent to modem for hang up Default ATH Time to wait for a retry if first call fails Default 5 value is in minutes Time to wait for a retry if all calls fail Default 1440 value is in minutes Mercor Mini AT Mini AT Operators Guide 40 2119 REV fp de e ML Sharing Cable 40 2390 or KAPAN ES Figure 10 Mini AT to MI Modem Connections ASSY 40 3000 Figure 11 Mini AT to Messenger Modem Connections Mercor Mini AT Page 33 Mini AT Operators Guide Note Some External Modem Connections will require wiring Rx to Rx and Tx to Tx to Communicate Check the modem manufacturers documentation for the proper wiring Figure 12 Mini AT to External Modem Connections Page 34 Mercor Mini AT Mini AT Operators Guide Power Sharing Cable Assembly p n 40 2390 Installing a Mercury Modem in a Mini AT enclosure necessitates the sharing of a single battery pack The power sharing cable allows an instrument and modem to operate from a single pack by reserving the power in alow battery forthe instrument The cable disconnects power from the modem when the battery
164. t alarms are automatically cleared after the alarm parameter returns to its normal operating range buffered by a user specified dead band Exceptions A D Fault andSwitch Faults 1 amp 2 Alarm Alarm Ack and Alarm Clear entries are time stamped into the Alarm Logger to provide details of alarm activity Also see Items 237 amp 174 for related functions Select 0 Standard Alarms Default 1 RBX Alarms A hysteresis band that provides a buffer below the PCor Pressure Hi limit item 010 and above the PCor Pressure Lo limit 011 when alarms are automatically cleared by RBX operation The user specified value determines the magnitude ofthe band The PCor pressure measurement item 008 must pass completely through the dead band before the pressure alarm is automatically cleared Default 5 00 PSIG A hysteresis band that provides a buffer below the Gas Temperature Hi limit item 028 and above the Gas Temperature Lo limit item 027 when temperature alarms are automatically cleared by RBX operation The user specified value determines the magnitude ofthe band The temperature measurement item 026 must pass completely through the dead band before the temperature alarm is automatically cleared Default 10 00 F A hysteresis band that provides a buffer above the Battery Low Limit Voltage item 049 when the main Battery Low alarm 1 automatically cleared by RBX operation The user specified value determine
165. tant to plug in the main battery or alternative power source before plugging in the backup battery Plug in the backup battery into the main board at connector J26 The Mini AT s LCD should display 00000000 indicating that the instrument is operating in the Corrector Mode and the settings reverted back to factory default values Connect to the Mini AT with a serial connection and configure the instrument to your company s specifications NOTE Item 126 in an unconfigured instrument will default to 9600 baud You must configure your Mercury software for 9600 baud in order to make the initial connection Remove the jumper from JB24 pins 3 amp 4 Mercor Mini AT Page 87 Mini AT Operators Guide Putting the Mini AT Shutdown Shutdown is a mode of operation invoked by the user prior to placing the instrument into storage or prior to performing some type of board maintenance The Mini AT Link software manual describes the procedure for putting the Mini AT into Shutdown There are two types of Shutdown that can be induced into the Mini AT Partial and Complete The connection status of the battery packs determines which type of Shutdown the instrument assumes 1 Partial Shutdown To put the Mini AT into partial shutdown from MasterLink32 software select and confirm SHUTDOWN from the Instrument menu Leave the main battery and backup battery plugged in In partial shutdown the instrument s r
166. ted with live parameters Select 0 NONE Default 4 LIVE 1 LIST 1 5 LIST 1 LIVE 2 LIST 2 6 LIST 2 LIVE 3 LIST 1 amp 2 7 LIST 1 amp 2 LIVE Mercor Mini AT Mini AT Operators Guide Item No Item Name Description 137 PCOR XDCR RANGE The upper PCor pressure range limit automatically scaled to the pressure units selected at item 087 If PSI is the selected pressure units then item 137 will be the same as item 025 Note the value atitem 137 may be manually edited to a rounded off number if desired Default 100 00 138 PCOR TRANSDUCER SER Serial number of the PCor pressure transducer printed on the transducer label manually inserted at the factory Note forcing Factory Defaults will not change the value of this item Default 00000000 139 SERIAL LINK CODE Code 0 2 to define the behavior of the instrument s RS 232 serial data transfer with Mini AT LINK and other 3rd party software Select 0 Two Way Read and Write Default 1 Read Only 2 Disabled Will not Read or Write 140 ENERGY The totalized gas energy equivalent to the totalized corrected volume item 000 multiplied by the Gas Energy Value item 142 and updated every correction cycle Default 00000000 141 ENERGY UNIT CODE The code 0 5 that selects the unit of measure for Energy 140 Select 0 THERMS Default 3 GJOULES 1 DKTHERMS 4 KILOCAL 2 MJOULES 5 KILOWATTHR 142 GASENERGY VALUE User provided value to ind
167. tep 4 then directly to step 9 3 Removepressure from the selected pressure transducer 4 Use a mag wand to scroll to the Live Pressure display PCor PLog of the Meter Reader List 5 Verify that the Mini AT s live pressure reading displays 0 00 PSI 0 25 of full scale 6 Ifthe pressure reading is within tolerance proceed to step 9 7 Ifthe Mini AT s displayed pressure reading is greater than 0 00 press the DOWN button on the Mercor Mini Field Calibrator until it reads 0 00 Ifthe Mini AT s displayed pressure reads negative ex 0 05 press the UP button until it reads 0 00 8 Press the ENTER button to lock in the pressure reading Note The Mini AT s LCD will go blank for a second while the instrument is computing the new P Zero value When completed the LCD will return to a live pressure display and further adjustments are possible if needed 9 Apply line pressure to the Mini AT s transducer Compare the live pressure display to the pressure reading on the calibrated pressure gauge If the two readings are within tolerance no further adjustments are needed proceed to step 11 10 If the two readings are outside an acceptable tolerance consider the most appropriate action listed in item 6 of Single Point Pressure Calibration Defined 11 Use the mag wand to return the instrument to the Corrector Mode 12 Unplug the Field Calibrator cable from the main board connection J2 The above procedure compared the Mini AT
168. the Unsquared Super Factor entered at Item 047 will be used for Supercompressibility Correction instead of a Live Super calculation NOTE if item 110 is Fixed a value must be entered at item 047 Entering a fixed Super value of 1 0000 will essentially disable the Supercompressibility function Select 0 No Fixed Factor Live Default 1 Fixed Factor Mercor Mini AT Page 103 Mini AT Operators Guide Item No Item Name 111 FIXED TEMP FACT 112 PCOR XDUCER TYPE 113 HIRES COR VOL 114 METER SCALING Page 104 Description Code 0 2 that selects Live or Fixed Factor Temperature When enabled for Fixed Factor code 1 the Temperature Factor entered at Item 045 will be used for temperature correction instead of a live calculation based on the input from the temperature probe NOTE if item 111 is Fixed a value must be entered at Item 045 It may also be necessary to enter a value at Item 026 Gas Temperature if Supercompressibility is Live Ifthe selection for Item 111 is code 2 Super the total correction factor will include the Fixed Factor entered at Item 045 usually 1 0000 while using the Live gas temperature from the temperature probe for the supercompressibility calculation The code 2 selection was made available for sites with TC meters Select 0 No Fixed Factor Live Default 1 Fixed Factor 2 Fixed Factor Temperature with Live Measured Temperature for Supercompressibility Comp
169. the instrument was accessed This information is updated with the value from item 224 at the beginning of every new gas day Note The gas day begins at the time entered at item 205 Default 00000000 Mercor Mini AT Page 115 Item 185 186 187 188 189 Mini AT Operators Guide Item Name PREDAY AV PCOR P PREDAY AV TEMP AVGUNSQ SUPER DAILY AV UNS SUP PREDAY AV UN SUP Page 116 Description Yesterday s Daily Average PCor Pressure expressed in the pressure units selected at item 087 1 the daily average PCor pressure that is one Gas Day old at the time the instrument was accessed This information is updated with the value from item 256 at the beginning of every new gas day Note The gas day begins at the time entered at item 205 Default 0 00 Yesterday s Daily Average Temperature expressed in the temperature units selected at item 088 i e the daily average temperature that is one Gas Day old at the time the instrument was accessed This information is updated with the value from item 257 at the beginning of every new gas day Note The gas day begins at the time entered at item 205 Default 0 00 The calculated Unsquared Supercompressibility Factor item 047 averaged over the selected Time Interval item 202 This value is flow weighted meaning the calculations result from input meter pulses only and relate exactly to Average Pressure item 206 and Average Temper
170. ting for battery power at item 59 during the transmission of volume pulses Valid factors are from 1 to 255 The following table list factors for different pulse output combinations Default 66 Power Factor 1 Channel 1 Channel 2 Channel Form C Form A Form A 240 Mercor Mini AT Item No 126 128 129 130 Mini AT Operators Guide Item Name BAUD RATE CODE MAG ALARM ACKNOWLEDGE LIVE DISP ENABLE MAG LIST 1 ITEM 1 Description Code 0 7 to select the instrument s baud rate for local serial connection communication error will result if the baud rate does not match the baud rate of the connected computer The 38 4 Kbaud selection is provided to achieve the fastest possible download times A separate item Item code 272 provides setting the baud rate for a modem connected at terminal strip TB2 Select 0 9600 Default 4 600 1 4800 5 300 2 2400 6 19200 3 1200 7 38400 Code 0 or 1 to enable or disable the clearing of all active alarms using the mag wand During the Meter Reader List an display will appear after scrolling through all active alarms Allowing the instrument to time out 1 minute at this display will clear all alarms If instead the mag wand is used to scroll to the next mag list item before the E E E E E E E E display times out the alarms are not cleared This feature is most useful if alarms need to be cleared and a
171. tocol incorporates data error checking Note Level 1 and Level 2 Access are computer software functions only Even after gaining Level 1 or Level2 Access changes to the instrument s configuration are not possible until a valid Instrument Access Code is entered After a serial link is obtained Audit Trail Event Log and Alarm Log downloads are also possible The Mini AT continues to recognize meter input pulses while in the Meter Read Level 1 and Level 2 Modes Upon exiting any serial link access the Mini AT will perform a Full Wake up just before returning to the Corrector Mode Following a meter reader access the instrument will return to the Corrector Mode a without a wake up if there were no meter rotations during the meter reader access b after an intermediate wake up with any number of meter rotations and N greater than one c after a full wake up with any number of meter rotations and N equal to one Page 18 Mercor Mini AT Mini AT Operators Guide Receiving the Mini AT Whenthe instrumentis delivered be sure that all parts are received in good condition Check the packing list to make certain the shipment is complete Report any shortage or shipping damages to your Mercury Representative Immediately file any damage claims with the carrier who delivered the shipment Function Check Open the case door and check for any loose parts and verify that all connectors are properly seated The main battery pack is packaged
172. tor to input switch board is not bypassed 2 3 Selects serial data for modem operation at TB2 Note 1 2 Selects Aux modem operation J20 Table 9 Default Jumper Settings Mercor Mini AT Page 73 Mini AT Operators Guide Flash Access Override Jumper Pins 1 amp 2 of Jumper Block 24 JB24 provide Flash Access Override With a jumper across pins 1 amp 2 the LOADER firmware 15 forced to execute after an instrument RESET An instrument RESET is defined as Unplugging the main and backup batteries from the main board for at least 20 sec onds and then plug in both batteries By default the jumper is removed LOADER firmware is a computer program resident in the Mini AT s internal memory for the sole purpose of allowing a user to upgrade the Mini AT s application firmware The LOADER firmware may also be upgraded when LOADER enhancements become available Note The Mini AT cannot return to the application firmware while this jumper is in place 246810 13 579 JB24 with jumper on pins 1 amp 2 Force Factory Defaults Jumper Pins 3 amp 4 of Jumper Block 24 JB24 provides a means to Force Factory Defaults With a jumper across pins 3 amp 4 the Mini AT will be configured to factory defaults after an instrument RESET Unconfigured An instrument RESET is defined as Unplugging the main and backup batteries from the main board for at least 20 seconds and then plug in both batteries By default the j
173. tting Item Code 128 Mag Alarm Acknowledge to Yes To clear all instru ment alarms scroll through the alarm codes until the LCD displays then simply allow the display to timeout which takes about 1 minute After the E E E E E E E E have timed out the LCD will display the first item of the Meter Reader List usually the Display Test 8 8 8 8 8 8 8 8 The alarms can also be cleared using Mini AT Link or MasterLink 32 software Report By Exception RBX Report By Exception Item Code 165 15 another alarm function that must be enabled using Mini AT Link or MasterLink32 software When enabled the RBX function automatically clears an instrument alarm after an alarm parameter has returned to its normal operating range buffered by a user specified dead band RBX will also clear the dots on the LCD when an alarm is cleared The Date and Time of all Mini AT Alarms Alarms Acknowledgment and Alarms Cleared are recorded in the Alarm Log regardless of whether RBX is enabled or if the alarms were cleared manually Mini AT Link software 15 used to download and generate an Alarm Report HELP Mode When the Battery Voltage Item 048 drops below the Shutdown Voltage Item 050 usually 4 8 volts the instrument enters HELP mode In this mode the LCD will display H E L P to signify that the battery voltage has reached a critical level All instrument operations are suspended in this mode with the exception o
174. tually exclusive meaning only one can be used at any given time However the baud rates can be independently selected for each port Use Item Code 126 to set the baud rate for the local port and Item Code 272 to set the baud rate for the modem port The Mini AT is shipped with a jumper across two pins of JB900 located in the top central portion of the main board The jumper must be on pins 2 and 3 to enable modem communications through terminal strip 2 see Table 4 See figures 10 and 11 on page 33 for power and RS 232 connections when an internal modem is installed Automatic Call In Feature The Mini AT has the capability to initiate a modem to modem telephone call This can happen under two circumstances The first of these is an Alarm Call In and the second is a Scheduled Call In The Alarm Call in feature can be configured to call in one of two ways The first is by using an alarm pulse to trigger the automatic call in feature of a Mercury Modem When an alarm condition is de tected the Mini AT will generate an alarm pulse The Alarm Call In feature 15 designed to be used with Mercury Instruments Alarm Link Software To use this method set the following items 333 Call in Trigger 1 Alarm Call in only 486 Modem AT Enable 0 Call in via Alarm Pulse Note The Mercury Modem has to be configured properly to use this method Refer to the Installation Guide for the Mercury Modem for more information The second Alarm Call In met
175. ulser A output pulses remaining from last wake up period waiting to be sent to a remote device Number of Pulser B output pulses remaining from last wake up period waiting to be sent to a remote device Number of Pulser C output pulses remaining from last wake up period waiting to be sent to a remote device Gas pressure measured at the last wake up and used in the pressure factor calculation Item 044 The pressure value is scaled to the unit of measure selected at item 087 and displayed with the appropriate number of decimal positions as selected at item 088 If the instrument 1 set to fixed factored pressure item 109 item 008 should be manually set to the average flowing pressure used in the supercompressibility calculations if super is active item 110 Mercor Mini AT Page 89 Item 009 010 011 012 013 014 015 016 017 018 Mini AT Operators Guide Item Name PCOR PRESS MAX PCOR PRES HILIM PCOR PRES LOLIM ATM CALREF BASE PRESS ATM PRESS PCOR REF PRES 1 PCOR REF PRESS 2 PCOR CAL ZERO 1 PREV PCOR CAL ZERO Page 90 Description Highest PCor pressure measured by the unit since last manually reset High limit for PCor pressure initiates alarms items 105 and 145 if exceeded Default 099999 99 Low limit for PCor pressure initiates alarms items 105 and 143 if exceeded Also used with item 003 Default 0 00 Local atmospheric pressure entered by the in
176. umper is removed Note During Force Factory Defaults the status of Event Log Lock and the values for Transducer Coefficients and Transducer Serial Number items remain unchanged 246810 4 13 579 JB24 with jumper on pins 3 amp 4 Page 74 Mercor Mini AT Mini AT Operators Guide Flash Access Security Jumper Mini AT firmware instrument operating instructions is stored in flash memory Adding new features and capa bilities to the instrument is simply a matter ofuploading a file containing a newer version of firmware through the serial port connection There are no EPROM chips to be removed or plugged into sockets Pins 5 amp 6 of Jumper Block 24 JB24 provides Flash Access Security With a jumper across pins 5 amp 6 the user is permitted to upload newer firmware into Flash Memory If there is no jumper across pin 5 amp 6 firmware upgrades will not be permitted As a check Item Code 268 can be read by Mini AT Link to determine what jumpers are installed on JB24 By default the jumper is installed The serial connection for a firmware upgrade can be either the local serial port or via a modem If the data is transferred viathe local serial port item 126 may be set to 38 4 Kbaud to achieve the faster possible transfer time Conversely if the transfer is viaa modem the transfer time will be noticeably longer for modems with carrier speeds less than 38 4 Kbaud 246 810 221422 13 5 79 JB24
177. umper to select Modem or Aux Modem Surge protected connections for Volume Pulse and Alarm Pulse Output Surge protected connections for Modem and Alarm Pulse Mercor Mini AT Page 9 Mini AT Operators Guide Quick Start Guide The following steps will guide you to getting the Mini AT instrument installed and operational 1 Carefully unpack the instrument and verify that there is no shipping damage also verify that nothing is missing from the shipment 2 Open the case door and make sure there are no loose connections or loose hardware 3 Install six new D cell alkaline batteries if using the Alkaline Receptacle Pack Plug the main battery connector into either J7 or J8 Hang the battery pack on the screws ofthe battery hanger plate located inside the door Install the battery cover if using a disposable pack 4 Plug the memory battery into J26 You may initially see the letter P across the LCD Mounting Screws Memory Alkaline n Battery Receptacle E Lm mm Pack f J26 Memory Battery Connector Connectors Battery C t Alkaline PME Receptacle Pack Page 10 Mercor Mini AT Mini AT Operators Guide 5 Verify that digits appear in the LCD display usually all zeroes Scroll through the meter reader list by swiping a mag wand down the right side of the display window to verify the instrument is operating Numeric Display Mag Wand Start at top of label and stroke downward to botto right corne
178. utations Code 0 or 1 to indicate the type of pressure transducer installed Since the equations to calculate pressure correction and supercompressibility are dependant upon the transducer type make sure the selection at items 087 and 112 are properly configured for the installed transducer Select 0 Gauge Default 1 Absolute Display of the fractional portion to the 4th decimal of item 000 Totalized Corrected Volume with the last three CorVol integers for reference Example if the value at item 000 equals 12345678 item 113 may appear as 678 2477 MCF The four decimal places are useful during field calibration checks when using a small number of meter revolutions Default 000 0000 Scaling factor for uncorrected volume input applied to the value selected at item 098 Meter Index Rate Usually used if the volume input is a value other than 0 1 1 5 10 100 1000 as is the case when an HFI board or 4 pole magnet disc is installed Default 1 0000 Mercor Mini AT Item No 115 116 117 118 119 Mini AT Operators Guide Item Name OUTPUT PULSE CD SQUARED SUPER TAG NUMBER REF NUMBER 71 REF NUMBER 2 Description Code 0 4 to provide slower pulse rates for remote counter readout devices that require more time to process volume pulses For a Form C output the coded value represents the pulse width in milliseconds For Form A output the coded value represents the
179. ve pressure reading to allow the user to determine if the span reference pressure has stabilized When the pressure has stabilized click the Pressure Now button when it becomes active to obtain a pressure sample 14 Ifthe average pressure reading is not equal to the span reference pressure click the Change button when it becomes active Enter the pressure value for the span reference pressure and then click As the computer screen updates the Mini AT will calculate the required span gain store this calculated value at Item Code 020 or 417 display the new values for items 017 414 and 020 417 display the previous values at items 018 415 and 021 418 beforereturning to alive pressure reading Obtain as many pressure samples as necessary until an acceptable span pressure reading is displayed 15 Compare the average pressure reading to the span reference pressure Ifthe average pressure reading is acceptable the pressure calibration process is complete As a suggestion recheck the pressure Zero reading and any number of pressure points within the transducer range or click Done to exit the calibration sequence Page 62 Mercor Mini AT Mini AT Operators Guide 2 Point Pressure Calibration Absolute Transducers 2 Point Pressure Calibration Items Required Pressure Source and fittings capable of providing pressures of at least 50 of the Mini AT s pressure transducer
180. ware Manager 1 05 02 10 29 2003 3 59 09 PM File Setup Transfer Help Mn M Mercor Mini AT Page 81 Mini AT Operators Guide 5 After clicking the gas pump button a dialogue box will appear Select the Mini AT firmare file matX XX XX txt and click continue Select Firmware Version Currently Installed Mini File Name Version Loader LDR11101txt 1 1104 Corrector MAT67O1txt 6 701 Default Mini AT Upload Configuration File Narre Version Corrector met67010 txt 6 7010 mat66302 txt Directories imat67010_txt c merc uryifw cs E gt mercury gt fwmgr z firmware List Fibs of Type Drives fle 2 Continue Cancel 6 Atthis pointthe software will display a warning about downloading instrument data Since this has already been completed in the pre firmware upgrade procedure press no to continue STOP I WARNING STOP Before upgrading the firmware it is strongly recommended that you read all of the data out of the instrument Items are usually reset to defaults by the firmware upgrade They should be read so that the instrument configuration can be restored after the firmware upgrade Restore the items after upgrading by sending them with Mini AT Link This program places the item file in the Link Items folder Log data audit trail event log alarm log will usually be

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