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Technical Reference Manual

1. uornpunj ejo1 eS L van MU ops fe ES ejaJ sse20Jd vul z Em VW INO wely L uueje Bojeuy z uJeje onsoufeiq uorneanDijuoo PON c suLe v Figure 60 Alarms 173 LFXG H Technical Reference Manual Appendix IV HART menus and screens Hd JO SJEMPIJEH UOI BWILUNS SJUNOD mo E py S eDueuo Jey t ules Dol eyep xny Z SJUNOD Joy JodeA Dol eyep xny Z HHHH H UIED Hd JOA OJEMPIEH INHON UOIJEWLUNS JodeA INHON SW ON C SuISU ON UOIJEWLUNS oden INHON HO ed uonesueduio Z S OL oun L indui Aueipixny Figure 61 Auxiliary input H Technical Reference Manual LFXG 174 Appendix IV HART menus and screens 4 4mA Level EK 3 20mA Level H H HH View settings 2 Min Level HH 1 Max Level HHH HH Figure 62 View settings LFXG H Technical Reference Manual 175 Appendix IV HART menus and screens 5 Linearizer 4 Current loop cal 3 Data collect Calibrations Counts Z 2 Process stdz 1
2. a zi o Seer eee eee ee PAVER ZABLE PER LOCAL CODES Le TE L E a 1 EARTH GRI a LFXGF Dar OR uz LSGF OETEC TOR T7 LT SH A I Pap IN LI X f A Vf _ POWER CABLE ff FER LOCAL GUDES i LFXOGF OSGF OA LSGF UNIT INTERCONNECT A IS TYPIGAL GF ALL UNITS Toa BE Z POWER e I N LS USED IN A PIBBYBAEK MLILT PLE M AEARTH GROWING SELL APPLICATION 5 Fi Mu SE HOUSING GROUND TYF Z A B CENELEC GROUND TYE yyy Lager QUTPJT SIGNAL CABLE pF FONER N T A IN l AMI n ET LEXGF OSGF OR BREAK DENDTES i LSGF DETECTOR POSSIBLE APRUONAL CM NU i LF XS OETECTORS ies Mem CAN CT POWER CABLE LOAN i PER LEAL UDPES LOX DAMER SE is Gel TDTAL NUMBER GF LFXCF ARTH GROUND gt m li DSF DR LSGF DETECTORS Se l AUXILIARY FOR THIS APPLICAT DN d CA FREND INPUT Figure 36 Interconnect Multiple detector 126 LFXG H Technical Reference Manual Appendix ll Special applications LFXG H LFXG F DSGF or LSGF Detector Power in L
3. Perform these data collection steps in any sequence Your ability to empty and fill the vessel determines the best sequence The simple calibration method skips Step 3 and 4 If using the standard calibration method you may find it helpful to record the sensor counts and levels at each step on Table 9 44 LFEXGH Technical Reference Manual Calibration Table 9 Standard calibration sensor counts and levels record Data type Sensor counts Actual level eng units Cal low level usually empty Linearizer data point O Linearizer data point 1 Linearizer data point 2 Linearizer data point 3 Linearizer data point 4 Linearizer data point 5 Linearizer data point 6 Linearizer data point 7 Linearizer data point 8 Linearizer data point 9 Cal high level usually full and Linearizer data point 10 LFXG H Technical Reference Manual 45 Calibration otep 1 Set low level Setting the low level for calibration requires the following activities e Measurement with the level transmitter of the low process level e Entry of the actual level This sets the low end sometimes referred to in the U S as zero of the calibration curve Perform this procedure either before or after setting the high level Note You must perform data collection for the low and high level within ten days of each other for a good calibration The low and high values must be more than 10 percent of the process span apart for the most accurate calibr
4. Consult VEGA field service Procedure 26 Viewing and acknowledging diagnostic alarms Select Gauge status Diagnostics from the main menu the first diagnostic condition appears Press F4 to view all the conditions If a diagnostic condition is in alarm e Select Acknowledge alarm to clear Or e Press NEXT to Ignore the alarm The Current Status Complete message appears after viewing all of the conditions Note If the relay is set as a diagnostic alarm you must acknowledge all diagnostic alarms to reset the relay 76 LFXG H Technical Reference Manual Diagnostics and repair Analog This alerts when the detector indicates the current loop set point value indicates zero counts No messages appear if this alarm is on check for the following e Source holder shutter is in the open or on position to create the necessary radiation field e Extreme build up on walls or other material is shielding the detector from the radiation field e Electrical connection damage or disconnection between the sensor assembly and the CPU board This alarm acknowledges when the 2 mA or 22 mA current loop output value becomes stable Process This alarm causes the relay output to trip when the process level is above or below a setpoint This alarms only works with the output relay No messages or Gauge status menu items display this information This alarm acknowledges when the process value returns back to the setpoint value Not
5. SO C 05 4d ueds jueoJegd 95 iH dE og juno 1ue2Jeg ON L ueds 1ueouJed 1 p3 05 ueds US 96 eDueJ junoo 1ueoJeg 9 Ge J9ZIJE9SUr Joziieaur peles L elep J9ZIJeaur Z d Ul 9 9 9S L Jozueoaur Figure 68 Linearizer 179 LFXG H Technical Reference Manual Appendix IV HART menus and screens AAIQQ ININ AA QQ ININ 9eds jo 1no eDej oA Josues AA IQQ ININ AA QQ IWIN eDuej jo 1no sseo2oJ4 AA IQQ ININ AA IO IWNIN I e Josues AAIOOIWIW AA QQ IWIN enp xoeuo ung AA QQ INW AA QQ ININ c d L uuely AA IQQ INW AA QG ININ ed Wwuely AA IGG WWE AA GG WW WOYE Ndo AA GG ININ AA QQ ININ punoj ssempsey M N AA IGG WWE AA QQ INIW enp ediM N AAIGG WW AA QQ IWIN enp ezipyepuexs AAIGG WW AA IO ININ Ile eJnje1eduue 10sues AA GG ININ AA QQ IW Ie YOO O euur Ee AA GG ININ AA QQ INIW dn HSY H AA GG ININ AA QQ INIW dn NOMCEH J0suas AA GG ININ AA QQ ININ dn JA VM ISeplO ISS 9N Asojsiy onsouDeiq Z E e ii sno AA GG IN IW exea AJOBIY ZPS AIOEu MIA 7 SSed snjejs 96e 0A Josueg ON 4 9DueJ Jo 1no sseooJg SSed snjejs Josues ON ADUDOL 9Jewpaeu M N ON anp xoeuo JANUS SSed Z ed uue
6. 10 2 0 Power in N 1 O Power in 3O Relay NO 2 O Power in 4 O Relay C 3 O 5 Relay NC neay 4 6 0 95 0 7 0 6 O Freq 8 O 7 O Freq 910 8 O O 9 O O Aux O O Aux O s O 4 20 O TUAM O 4 20 O O Figure 37 Multiple detector interconnect terminals LFXG H Technical Reference Manual 127 Appendix Il Special applications Initial settings and calibration requirements Refer to these sections of this manual for more details Table 24 Initial setting and calibration locations Setting Manual heading Page Select Summation mode in Initial setup Setting up summation mode 129 Set span for total of all detectors Span settings 103 Calibrate according to guidelines in calibration chapter Initial process calibration 31 128 LFXG H Technical Reference Manual Appendix ll Special applications oetting up summation mode Procedure 49 Setting up summation mode 1 From the Main menu select Initial setup 2 From the Initial setup menu select Auxiliary input 3 From the Auxiliary input menu select Compensation The compensation screen displays the current type of auxiliary input 4 From the Compensation menu select Type 6 From the Type menu select Summation T Press F4 to enter 8 If using a hand held HART communicator press F2 to send the settings to the transmitter Calibrating with multiple detectors summation The calibration procedures are the same with one or multiple detectors The summin
7. Jo1duoseq Z oDessoe W Ojul Wayshs G pad ONP UO 1nus DON Z p 9ONp edi X N bel p enp ynys ediM DON G ON C so AYO 1nus p1008 Y skiep 8 8 Eet xu INUS DN S9A edi pj0094 Z shep EAR d M L eoJnos ON CGC X Lyc WY 09 9D LELSO uornpun eoanos e ES IN W HH eui z AA QQ IN IW eed L adA eounog Z CHE pue au 4 SJojoujeJed wiayshs Figure 59 System parameters H Technical Reference Manual LFXG 172 Appendix IV HART menus and screens W Jeudi p S poued ep VUJ f OAD JOU c pJOUSOJU LUES Aelux y HHHHH d 1utodjes Aey z UO HO J JO JNO Sse20Jgd UO HO np xyoeup Je1inus UO HO c ed uuelv UO HO d L uuely UO HO n1109 NONE Ndo c do onsouDeiq UO HO noj oJeMpJeu M N UO HO enp ediM N UO HO enp ezipJepuers uO HO dd Josua UO HO xooj euun eae UO HO nu HSY H UO HO O9 J OMcEH Jee UO HO 1dnuJoo ie do onsouDeiq KeJ x SS900Jd onsuDeiq ux N L
8. LSG F Out put signal cable Power cable per local code a Power SE E BEES Auxiliary eee IL Input Housing ground CENELEC ground Figure 40 Interconnect LFXG F with LEXG H LFXG H Technical Reference Manual 133 Appendix Il Special applications 134 LFXG H c o AJ Oo Om P GA Mi O O O O O O O O O O O O O O Power in L Power in N Relay NO Relay C Relay NC Relay Aux Aux 4 20 4 20 LFXG F DSGF or LSGF Detector Power in Power in Freq Freq OO OO AJ Oo Om P GA Mi Aux Aux O O O O O O O O O O O O O O Figure 41 Dual detector interconnect terminals LFXG H Technical Reference Manual Appendix ll Special applications Initial settings and calibration requirements for NORM compensation opecific software settings and calibration procedures are required for NORM compensation oetting up NORM compensation Procedure 50 Setting up NORM compensation 1 From the Main menu select Initial setup 2 From the Initial setup menu select Auxiliary input 3 From the Auxiliary input menu select Compensation The compensation screen displays the current type of auxiliary input 4 From the Compensation menu select Type 6 From the Type menu select Compensation f Press F4 to enter 8 If using a hand held HART communicator press F2 to send the settings to the transmitter LFXG H Technical Reference Man
9. Table 18 Setting process values of 0 and 100 Forward acting proportional Reverse acting inversely proportional 4 mA Level 20 mA Level 4 mA Level 20 mA Level 100 100 0 Procedure 36 Setting the current loop span 1 From the Main menu select Initial setup 2 From the Initial setup menu select Process parameters 3 From the Process parameters menu select Spans 4 From the Spans menu select Current loop span 5 From the Current loop span menu select 4 mA Level 6 In the 4 mA Level screen enter the minimum value for the measurement span f From the Current loop span menu select 20 mA Level 8 In the 20 mA Level screen enter the maximum value for the measurement span 9 Press F2 to send the setting to the transmitter LFXG H Technical Reference Manual 105 Appendix Initial factory setup oystem parameters The system parameters define settings for the internal operation of the level transmitter and the radiation source Time Current time in HH MM SS as set in the real time clock The time maintains during power failure for up to 28 days It is important to enter the correct time and date because they are used for several internal calculations Time reverts to 00 00 00 on clock failure Date Current date in MM DD YY month day year format The date reverts to 00 00 00 on failure oetting the time and date Procedure 37 Setting the time and date 1 From the Main menu select Initial setup
10. 86 LFXG H Technical Reference Manual Diagnostics and repair Transmitter not responding flowchart part 1 The transmitter is not responsive HART communication is OK Start Power distribution checks Remove pipe cap from transmitter ousing Are all LED lights OFF Is power at input terminal strip AC at term 1 2 3 DC at 3 6 7 No Check power source and interconnect wiring Check wiring at CPU board CN2 T1 5V T2 5V If wiring OK Q sensor is shorting out Yes power Replace sensor e Yes EE di 15 Zeie from on CPU board test points p Do LEDs go on 5V IsoG ISO30v Iso CPU board to isolate 5V IsoG power from sensor No Check wiring between CPU board CN3 and power LED bank bad DC distribution supply board TB2 and TB1 Replace CPU board bad Replace CPU board Refer to power diagram Remove CN2 15 pin connector from CPU board to isolate power from sensor Is 24VDC present between power supply board TB2 pins1 amp 4 No Yes Check wiring at Y eS CPU board CN2 T1 5V T2 4 5V Is 24VDC present between power supply board TB2 pints 1 amp 4 If wiring OK sensor is shorting out power Replace sensor No DC power bad Replace power supply board Figure 29 Transmitter not responding flowchart Part 1 LFXG H Technical Reference Manual 87 Diagnostics and repair Transmitter not responding flowchart part 2
11. Analog alarm checks I dA a gS eat pay Lt Lr LLMN omg e Pee a ee ee ee ep cL 71 Analog alarm is set See Yes manual section on Is analog output locked at either 2mA or 22mA analog alarms for diagnostics No T oe SN LED Diagnostics checks SHEI CEN J CPU may be locked up Is CPU LED 5 No CPU locked up flashing ED S not Ponsng Replace CPU board Cycle power Yes LED 2 flashing or ON No indicates a memory Is LED 2 OFF problem See manual LED table for more info Yes Check all other LED conditions Yes Call Ohmart Field Service U S 513 272 0131 o ee At gt ee ee Figure 30 Transmitter not responding flowchart part 2 88 LFXG H Technical Reference Manual Diagnostics and repair Maintenance and repair Periodic maintenance schedule since the LFXG H contains no moving parts very little periodic maintenance is required We suggest the following schedule to prevent problems and to comply with radiation regulations Table 17 Periodic maintenance schedule Description Frequency Procedure As required by process conditions usually Standardize at least once a month Calibration chapter Every six months unless otherwise Radiation safety instructions shipped Source holde
12. Calculating the calibration result Procedure 8 Calculating the calibration result 1 From the Main menu select Calibrations 2 From the Calibrations menu select Initial cal 3 From the Initial cal menu select Two point cal 4 From the Two point cal menu select Cal result o The screens display the results of the cal low and cal high sensor counts and values Review the values You can manually edit the counts and actual or new data can be collected by repeating the Set low and Set high procedures or press F4 to continue 6 The prompt Proceed with Calibration Calculation displays Select Yes to proceed with the calculation f Press F2 to save 50 LFXG H Technical Reference Manual Calibration When a new calibration may be necessary Under most circumstances you do not need to repeat the calibration procedure The system requires only periodic standardization to compensate for drifts over time However certain events necessitate a new initial calibration The events are e Measurement of a new process application contact VEGA for recommendation e Process requires a new measurement span e Entry of a new measurement span setting into the software e Installation of a new radiation source holder e Moving the level transmitter to another location in U S only specifically licensed persons may relocate the gauge e Changes to the process vessel for example lining insulation or agitator e Excessive build up o
13. Introduction Unpacking the equipment CAUTION Make sure that you are familiar with radiation safety practices in accordance with your U S Agreement State U S NRC or your country s applicable regulations before unpacking the equipment m Unpack the unit in a clean dry area v Inspect the shipment for completeness by checking against the packing slip v Inspect the shipment for damage during shipment or storage H If the detector is included as a separate package in the shipment inspect the assembly for damage that may have occurred during shipment or storage H If there was damage to the unit during shipment file a claim against the carrier reporting the damage in detail Any claim on the VEGA for shortages errors in shipment etc must be made within 30 days of receipt of the shipment v If you need to return the equipment see the section Returning equipment for repair to VEGA in the Diagnostics and Repair chapter H After you unpack the equipment inspect each source holder in the shipment to assure that the operating handle is in the OFF position In the event that you find the handle in the ON position place it in the OFF position immediately and secure it Note Most source holder models accept a lock Call VEGA Field Service immediately for further instructions at 513 272 0131 if the source holder has one of the following conditions Does accept a lock and there is no lock on it The lock is not secured
14. Note VEGA View PC Software users The linearizer data collection procedure is significantly different in VEGA View Refer to the VEGA View User Manual for instructions to collect linearizer data Before collecting the linearizer table data H Prepare to set the level and take data Ten levels including the Cal low and Cal high levels are the maximum vi Prepare to enter the levels into the transmitter H You can collect linearizer table data along with the data collection for the Cal low and Cal high levels Collecting linearizer table data Procedure 6 Collecting linearizer table data 1 From the Main menu select Calibrations 2 From the Calibrations menu select Linearizer 3 From the Linearizer menu select Linearizer data 4 From the Linearizer data menu select Linear data collect 9 From Linear data collect menu select Collect datapoint 6 At the prompt enter the actual known level of process f Accept or reject the results when they display 8 Repeat procedure for all available levels 9 Press F2 to send Note Include the data for the Cal low and Cal high with the linearizer data before you perform Calculate linearity If you did not perform a linearizer data collect while the process was at the levels for Cal low and Cal high you can manually add those values to the linearizer data To add a data point to the linearizer data you must know the level in engineering units and the sensor counts Go to the Add new data
15. The VEGA continuous level gauge is a transmitter so it produces the current loop signal directly at the measurement site Use either a HART Communicator or HART modem and VEGA View or Ohmview 2000 software with a PC to enable the following e Initial setup e Calibration e Other communication with the gauge You can make a connection anywhere along the 4 20 mA current loop line After setup and calibration of the level gauge there are no day to day requirements for external electronics Using a universal hand held terminal VEGA s LFXG H level gauge is compatible with the Fisher Rosemount HART Communicator The HART Highway Addressable Remote Transducer Communicator uses the Bell 202 Frequency Shift Keying technique to superimpose high frequency digital communication signals on the standard 4 20 mA current loop To function the minimum load resistance on the 4 20 mA loop must be 250ohms Q Refer to the instruction manual for your HART Communicator for information on the following e Key usage e Data entry e Equipment interface LFXG H Technical Reference Manual 11 Introduction 1 2 Figure 7 HART hand held communicator In order to effectively use the features in VEGA s level gauge you must use VEGA s device description DD to program the HART communicator You may purchase a universal hand held terminal programmed with the device through VEGA VEGA part number 236907 Use firmware 2000 00 or
16. e Have a unique address for their reply e Have a table listing other network gauges with information that it requires and the function of that data e Can listen to all of the responses of the other gauges which enables each responder gauge to update the count information from other gauges if setup to do so 138 LFXG H Technical Reference Manual Appendix ll Special applications Installation requirements Figure 42 Typical installation vapor compensation amp auto zero Figure notes 1 Radiation source holder Radiation beam Minimum process level measured Radiation detector DSG with HART protocol output using RS 485 Radiation detector s level with HART protocol output using RS 485 Side view Top view LFXG H Technical Reference Manual 139 Appendix Il Special applications Detector wiring Figure 43 Interconnect GEN2000 RS 485 multiple detectors transmitters Figure notes 1 Sensor location 2 High level alarm vapor density 3 Relay 4 DSGH detector S Power Earth ground 6 Top level T LFXG H or LSGH 8 RS 485 signal cable 140 11 12 13 14 15 16 4 20 mA output Middle level CENELEC ground Housing ground RS 485 connection enlarged Bottom level Low level alarm auto zero Additional detectors option 19 20 21 22 Control room 4 20 mA output signal Modem PC Handheld terminal option mA input DCS LFXG H Tech
17. 0 100 Figure 21 Count range vs span shown in linearizer table Both calibration methods Figure 22 illustrates the effect on the final output of using the non linear table vs the linear table for the linearizer Using the non linear table linearizer in the standard method produces a linear output Using the linear table linearizer table produces a non linear output Standard Indicated A Level Min Level Actual Max Level Level Figure 22 Indicated level vs actual level LFXG H Technical Reference Manual 41 Calibration Choosing the linearizer type The level transmitter response curve is non linear due to the measurement method of radiation transmission The linearizer determines the shape of the curve between the endpoints As part of the signal processing necessary to produce a linear final output with respect to the change in level of process material the level transmitter offers the following choices 1 Non linear table 2 Linear table Non linear table Use this option for a standard method calibration The non linear table is more accurate than the linear table This is because it the non linear table takes into account the inherent non linearity of a nuclear transmission measurement The non linear table can use data from the following e Linearizer look up table data points that you collect and enter during the calibration process e Linearizer data from an earlier model VEGA level gauge Tabl
18. From the Alarms menu choose Set relay function 4 From the Set relay function menu select Diagnstic and press F4 to enter 5 If using a hand held HART communicator press F2 to send the setting to the transmitter 112 LFXG H Technical Reference Manual Appendix I Initial factory setup Analog alarm setup The analog alarm uses the current loop analog output to signify that the sensor is outputting zero counts In this case the analog output sets to either 2mA or 22mA and no longer tracks the process level The user can choose the 2mA or the 22mA setting for the analog alarm Table 20 Analog alarm conditions Alarm out 22mA Alarm out 2mA oetting the analog alarm output Procedure 44 Setting the analog alarm output 1 From the Main menu select Initial setup 2 From the Initial setup menu select Alarms 3 From the Alarms menu select Mode configuration 4 From the Mode configuration menu select Analog alarm 5 From the Analog alarm menu select Alarm output 6 From the Alarm output menu select either 22mA or 2mA e Press F4 to enter 8 If using a hand held HART communicator press F2 to send the change to the transmitter LFXG H Technical Reference Manual 113 Appendix Initial factory setup Process alarm setup Use the process alarm setup to make the relay output a high or low process alarm For a low limit a process level below a set point energizes the relay for a high limit a process level above
19. The prompt Verify New CPU Board Installed displays Select Yes to allow new backups on the EEPROMs or select No to cancel Proper response to New hardware found message if new hardware has not been installed CPU EEPROM Corrupt message or Sensor EEPROM Corrupt message If there has not been an installation of a new CPU board and the error message New Hardware Found displays then one of the EEPROMSs is probably corrupt You normally can repair the corruption with the EEPROM backup CAUTION If you suspect that an EEPROM is corrupt we recommend you call VEGA Field Service for advice before performing the following procedure LFXG H Technical Reference Manual 59 Advanced functions 60 To repair the corruption from the EEPROM backup Procedure 12 Repairing corrupted EEPROM From the Main menu select Advanced Fxns From the Advanced Fxns menu select New hardware From the New hardware menu select No new hardware At the prompt Do You Want To Reconcile Differences select Yes to allow restoration from backups on the EEPROMs Or select No to cancel LFXG H Technical Reference Manual Advanced functions Test modes Five independent test modes are available These test modes are 1 mA Out test mode 2 Sensor test mode 3 Aux Inp test mode 4 Relay test mode 5 Temperature test In the test modes the transmitter stops measuring the process material and allows manual adjustment of critical variables for troubl
20. VC gain VC gain is the vapor compensation gain user enters value during calibration 158 LFXG H Technical Reference Manual Appendix ll Special applications Initial settings and calibration for vapor comp oetting up vapor compensation Procedure 56 Setting up vapor compensation 1 Perform the following steps to set the DSGH up as a level gauge e From the Main menu select Advanced Fxns e From the Advanced Fxns menu choose Select Gage type e From the Select Gage type menu select Level e Press F2 to send to the transmitter 2 Return to the Main menu 3 Perform the following steps to select Vapor compensation e From the Main menu select Auxiliary input e From the Auxiliary input menu select Compensation e From the Compensation menu select Type e From the Type menu select Vapor e Press F4 to enter You return to the Compensation menu 4 Return to the Auxiliary input menu 5 From the Auxiliary input menu select Filter TC 6 Set the filter time constant For best response this value should be five seconds If this value is too large gt 10sec the system response slows with long settling times on the final output T From the Compensation menu select Vapor 8 From the Vapor menu select Gain e Setthe Gain to 1 0 e You adjust it again during the calibration procedure 9 If using a hand held HART communicator press F2 to send the settings to the transmitter LFXG H Technical Reference Manual 159 Appen
21. 2 From the Initial setup menu select System parameters 3 From the System parameters menu select the Time and Date 4 From the Time and Date menu select Time e Enter the current time e Press F4 to save the time setting e Press the LEFT ARROW key to return to the previous Time and Date screen 5 From the Time and Date screen select Date e Enter the current Date e Press F4 to save the date setting 6 If using a hand held HART Communicator press F2 to send the updated parameters to the transmitter 106 LFXG H Technical Reference Manual Appendix I Initial factory setup Source type Use the Source type feature to view or enter the isotope in the source holder that produces the radiation signal The VEGA factory enters this parameter based on information received at the time of the order You can check the isotope type against the source holder label Procedure 38 Setting the source type 1 From the Main menu select Initial setup 2 From the Initial setup menu select System parameters 3 From the System parameters menu select Source type 4 In the Source type screen select one of the following source types e Cs 137 e Co60 e Am 241 e Cf 252 e No source 5 Press F4 to enter 6 If using a hand held HART communicator press F2 to send the updated parameters to the transmitter Source function Wipe Interval Use the Wipe interval feature to view or enter the interval in days between successive source wipe diag
22. HART menus and screens 0 Sjunoo UU sjunoo MEI xny Jeuueuo xny e uleyo G tt GE Dunes AH 6 UED ZPE 8 Hu geb eoe sounds 7 USD juuojun 9 USD dwog duet e SETZE AT UIN v Uo TE EHE FHF 9 9 XEN HHH ybiy Sun Z HHHHH MOI S UNOO s jqeleAn SS920Jd Z YHHHH HHH 9 9 HH HH wi dwooun GEET 9 9 MEY HHHH HH upCsIoo e eDuel1u23959 SUD ZPD s unoo 9 44 sjunoo pys sun MY 7 HH sjunoo25 e suo JOSUS Z o Bep due ouugeuo Mew urey SSa20Jd Figure 71 Process chain LFXG H Technical Reference Manual 182 Appendix IV HART menus and screens Min max history 1 Temp min max 4 Reset min max 5 Last reset MM DD YY 2 Sensor min max 3 Aux in min max Figure 72 Min max history LFXG H Technical Reference Manual 183 Appendix IV HART menus and screens S9A c ON L S8A c ON L S9A c ON L ESBOUBIOJJIP e uooeiJ O JUeEM no OG pe je1u Josues M U AURA payeysul pyeoq dO eu jUueA 91e MpJeu MOU ON E Josues MON Z p1eoq Ndo MON L 9JeMpJeu M N Figure 73 New hardware H Technical Reference Manual LFXG 184 Appendix IV HART menus and
23. Initial cal Figure 63 Calibrations 176 LFXG H Technical Reference Manual Appendix IV HART menus and screens ON Z Sai AUOUEIOEZ uoneJgijeo uj P9800dq anjen uoneiqueo YBIH idt ONIeA enpe yndu SoA Z HHH SIUNOD juiod uoneJqireo YBIH ON L AA QG ININ eed HH NLA HH HS UNOD nn jurod eo DI VD j NJLA uoneJqiEo Mmo HHH S JUNOD juiod uoneJqijeo mog SoA Z ON L AA GQ WWW 8q TE NLA HHH SJUNOD tH ILD S UO oDneo 96 enje penye 1nduJ amp 9n BA julod eo MO7 UD inseJ EC tH ILD S UO oDneo ON eyep exe julod SOA L uoljeuqijeo UD y 0 sseooud es e e UD ED 38S Z ON c EIER aye juod Sai L UOUEIOUE moj y 0 sseooud 1es Baal MO ED 385 jeo juiod OML d E P S L jeo eru Figure 64 Initial cal 177 LFXG H Technical Reference Manual Appendix IV HART menus and screens snoo BAY S9A C ON L is unoo UD o 424 ONICA jenze ndu jo HHH SEI SUD oDnec ON c SoA L ON EA peJrsep 0 sseooJd E
24. Initial cal 177 Process stdz 178 Data collect 178 Current loop Cal 178 Linearizer 179 Gauge status 180 Advanced Fxns 181 Process chain 182 Min max history 183 New hardware 184 Test mode 185 Other advanced 186 Select gage type 187 Select gage location 187 XI Preface Explanation of symbols Table 2 lists the symbols that the manual and instrument use Table 2 Explanation of symbols Radiation notice In the manual information concerning radioactive materials or radiation safety information is found in the accompanying text Caution The text next to this symbol contains the warning of potential damage to equipment or people Attention Le texte apparaissant pr s de ce symbole vous informe d un danger possible pour l quipement ou pour l usager AC current or voltage On the instrument a terminal to which or from which an alternating sine wave current or voltage may be applied or supplied DC current or voltage On the instrument a terminal to which or from which a direct current voltage may be applied or supplied Potentially hazardous voltages On the instrument a terminal on which potentially hazardous voltage exists xii LFXG H Technical Reference Manual Preface Notes LFXG H Technical Reference Manual xiii Preface HART software screens The two charts that follow illustrate the offline and online HART communication screens For complete illustrations of all HART hand held communicator
25. LFXG H Technical Reference Manual T Introduction Principle of operation VEGA s continuous level gauge is a nuclear gauge that receives a shaped or collimated beam of radiation through the process material from the source holder The material in the vessel acts as a shield that prevents a portion of the detector from exposure to the radiation field As the level decreases the detector senses more radiation As the level increases the detector senses less radiation Calibration of the level gauge associates the detector readings known as counts with the level of the material in engineering units The output range of the gauge is a 4 20 mA current loop signal in proportion to the level of the process See Appendix for examples of process value settings oystem overview The LFXG H flexible detector uses VEGA s GEN2000 electronics The GEN2000 is VEGA s newest compact electronics that support 4 20 mA HART protocol frequency or field bus output The level measurement system consists of three main components 1 Source holder 2 FiberFlex flexible detector assembly LFXG H 3 Communication device HART modem with PC or HART Communicator model 275 Source Holder FiberFlex Detector Power Power Hand held Terminal Control System HART Modem Computer Figure 4 System overview 8 LFXG H Technical Reference Manual Introduction The following statements describe the source holder
26. Procedure 19 Start Relay test mode 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select Test mode 3 From the Test Mode menu select Relay test mode 4 From the Relay test mode menu select Enter mA test mode 5 At the prompt select Energize relay or De energize relay The transmitter continues functioning in Relay test mode until it times out after one hour or until you choose Exit relay test Exit relay test mode Procedure 20 Exit Relay test mode 1 From the Advanced Fxns menu select Test mode 2 From the Test mode menu select Relay test mode 9 From the Relay test mode menu select Exit relay test 66 LFXG H Technical Reference Manual Advanced functions Temperature test mode The temperature test mode enables the user to manually force the LFXG H sensor temperature probe output to a specified value This is useful for verifying the scintillator sensor temperature compensation Start temperature test mode Procedure 21 Start Temperature test mode 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select Test mode ES From the Test mode menu select Temperature test mode 4 From the Temperature test mode menu select Enter Temp test 5 At the prompt enter the value of the new temperature you wish to force The transmitter continues functioning in Temperature test mode until it times out after one hour or until you choose Exit Temp test mode Exit temperat
27. Requesting field service To request field service within the U S and Canada call 513 272 0131 from 8 00 A M to 5 00 P M Monday through Friday For emergency service after hours call 513 272 0131 and follow the voice mail instructions Returning equipment for repair to VEGA When calling VEGA to arrange repair service have the following information available H Product model that is being returned for repair m Description of the problem H VEGA Customer Order C O Number H Purchase order number for the repair service wv Shipping address v Billing address H Date needed H Method of shipment M Tax information 94 LFXG H Technical Reference Manual Diagnostics and repair Returning equipment for repair Procedure 30 Returning equipment for repair 1 Call VEGA Nuclear Products Repair at 513 272 0131 between Monday and Friday 8 00 A M to 5 00 P M United States Eastern Standard Time 2 VEGA assigns the job a material return authorization MRA number Please note VEGA reserves the right to refuse any shipment that does not have a MRA number assignment 3 Indicate the MRA on the repair service purchase order 4 Clearly mark the shipping package with the MRA number 5 Send the confirming purchase order and the equipment to VEGA Americas Inc Attention Repair Department 4170 Rosslyn Drive Cincinnati OH 45209 1599 USA Note You must first contact VEGA and receive a material return authorization number
28. Setting the relay as an x ray alarm 118 Auxiliary input settings 119 Input filter 119 Setting the auxiliary input filter 120 Procedure 48 Setting the input filter 120 Appendix II Special applications 121 Multiple detectors summation 122 Figure 34 Multiple detectors summation 122 Special drawings from VEGA 123 Notes on the frequency output detector 123 LFXG F spare parts 124 Table 23 LFXG F spare parts 124 Installation requirements 124 Figure 35 Placement of multiple detectors 125 Detector wiring 126 Figure 36 Interconnect Multiple detector 126 Figure 37 Multiple detector interconnect terminals 127 Initial settings and calibration requirements 128 Table 24 Initial setting and calibration locations 128 Setting up summation mode 129 Procedure 49 Setting up summation mode 129 Calibrating with multiple detectors summation 129 NORM naturally occurring radioactive material compensation 130 Figure 38 NORM compensation system 130 Special drawings for NORM Compensation 131 Installation requirements 132 Figure 39 Placement of detectors for NORM compensation 132 Detector wiring 132 Figure 40 Interconnect LFXG F with LFXG H 133 Figure 41 Dual detector interconnect terminals 134 LFXG H Technical Reference Manual IX Preface Initial settings and calibration requirements for NORM compensation 135 Setting up NORM compensation 135 Procedure 50 Setting up NORM compensation 135 Calibrating with NORM compensation 136 Procedure
29. The transmitter does not operate if the FLASH chip is corrupt A HART device that connects to the transmitter displays the message No Device Found In this situation the LED bank displays a distinctive pattern Call VEGA Field service to report this condition LED 6V 24V Relay Table 15 Power supply board LED summary Power Supply Board LED summary table Description 6V DC voltage level to electronics Analog output loop voltage Relay condition indicator Normal condition ON ON when relay is energized OFF when relay is de energized Error condition OFF electronics are not receiving 6V DC voltage required for functioning OFF 24V not present on 4 20 mA output 4 20 mA output and HART communications are bad None LFXG H Technical Reference Manual Recommendation Verify 6V on test points Check fuse on Power Supply board Check power input terminals 1 2 Check loop wiring and jumpers JP1 JP2 on Power Supply board Replace Power Supply board Check against relay output terminals 3 4 amp 5 If no relay output replace Power Supply board 83 Diagnostics and repair LED Mem HART CPU Aux HV Field 84 Description Memory corruption EEPROMs FLASH HART communicatio n indicator Central processing unit on CPU board heartbeat Auxiliary input frequency signal indicator Sensor high voltage Radiation field indicator C
30. a gauge to remote if the sensor electronics and processing electronics are in separate housings and the process signal connects to the auxiliary input of the processing electronics Procedure 25 Select gage location 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu choose Select Gage Locati 9 From the Select Gage Locati menu select either Local or Remote 4 If using a HART hand held communication device press F2 to send TO LFXG H Technical Reference Manual Chapter 5 Diagnostics and repair ooftware diagnostics The system alerts users to potential problems by Posting messages on the HART screens Energizing the output relay Distinctly changing the current loop output Tracking the status and history of the four current alarms on the Gauge status screen LFXG H Technical Reference Manual 71 Diagnostics and repair Alarms There are four basic alarms They are 1 Diagnostic 2 Analog 3 Process 4 X ray Alarm type Diagnostic Analog Process X ray Trigger relay Yes No Yes Yes Table 10 Alarm type summary Display HART Current loop output Gauge status and message affected history Optional NO Yes No Yes No No No No No Yes No Note Instructions for setting alarms and their parameters are in Appendix of this manual 72 LFXG H Technical Reference Manual Diagnostics and repair Diagnostic This alarm provides information about the transmitter system and when
31. causes the gauge to erroneously read upscale e Rapidly changing tank conditions due to material buildup Regular standardizations compensate for slowly changing tank conditions due to material buildup See the Calibration chapter for information on standardization Avoid source cross talk When multiple adjacent pipes or vessels have nuclear gauges you must consider the orientation of the source beams so that each detector senses radiation only from its appropriate source The best orientation in this case is for the source holders to be on the inside with radiation beams pointing away from each other LFXG H Technical Reference Manual 21 Installation Mounting the measuring assembly There are two types of mounting options The first type is the bracket mount The L bracket supports the electronics housing For this type of mounting the conduit clamps should be spaced every 18 The second type of mounting is the conduit mount This type of mount consists of an adapter with a 2 conduit coupler part number 240721 It provides an air hose fitting for applications that need to cool the detector The pole mount requires a nipple and union Figure 13 illustrates the two mounting types Note The detector active area where it is possible to make a level measurement is between 1 from the bottom of the detector to the end of the flexible conduit Mount the detector so that this area spans the desired measurement length N
32. kits are available one for 115 VAC one for 220VAC and one for 24VDC The part numbers are shown below Table 25 Heater kit part numbers Heater kit power VEGA Part Number 115 VAC 240723 220 VAC 240724 24VDC 241912 Changes to specifications The power rating changes from the specifications on page 5 of this manual when you install the heater kit on the LFXG H With the installation of the heater the maximum power consumption increases to 25W The unit is either 115VAC 10 or 220VAC 10 instead of the standard 90 270VAC range or 24VDC Notes 162 LFXG H Technical Reference Manual Appendix III Preserving information from SmartPro to the LFXG H This appendix describes how to preserve information from an existing level gauge to the LFXG H Preserving information from SmartPro If you have existing Smart Pro electronics Smart Pro or Smart Pro Pac you can preserve information on setup and calibration from the Smart Pro electronics This information can transfer to the new transmitter electronics saving a great deal of time commissioning the gauge Note Smart 1 and Smart 2 electronics users can preserve the information from their systems and transfer it to the HART electronics We recommend consulting VEGA Field Service for help on your individual installation Note EDS users cannot transfer information to the HART electronics You must perform new setup and calibration procedures After the new electronics ar
33. menus and screens see Appendix IV O o o C CL o C z Ds 9 e VS gE D c oO t z E As D E Q 2 O z O O 0 O To co Oo D o o Sc 9 Do c c 2 o c o c Oo s 9 a C St oc O T o D c o gt Oo 0 Ox o Oo t o ER 2 LL LL kb o ha c gt 2 03 c o 3 O O Z Figure 1 HART screen gauge not connected xiv LFXG H Technical Reference Manual Preface SUN peoueApy t snjej oDnec e SuOUEIOIE Z dnies Eu nusw uie VW HH HF ino IND Z Jo H HF awe L pejoeuuoo J9 ILUSUEL S9Jnje9J uaaJ9s JHVH gauge connected Figure 2 HAHT screen XV LFXG H Technical Reference Manual Preface Your comments VEGA values your opinion Please fill out this page so that we can continually improve our technical documentation Manual LFXG H Technical Reference Manual Date Customer Order Number How we can contact you optional if you prefer to remain anonymous Name Title Company Address Did you find errors in this manual If so specify the error and page number Did you find this manual understandable usable and well
34. organized Please make suggestions for improvement Was information you needed or would find helpful not in this manual Please specify Please send this page to VEGA Americas Inc Director of Engineering 4241 Allendorf Drive Cincinnati OH 45209 1599 XVI LFXG H Technical Reference Manual Preface Notes LFXG H Technical Reference Manual XVII Chapter 1 Introduction Nuclear materials notice This equipment contains radioactive source material that emits gamma radiation Gamma radiation is a form of high energy electromagnetic radiation Only persons with a specific license from the U S NRC or other regulating body may perform the following to the source holder Dismantle Install Maintain Relocate Repair Test VEGA Field Service engineers have the specific license to install and commission nuclear gauges and can instruct you in the safe operation of your level gauge To contact VEGA Field Service call 513 272 0131 Users outside the U S and Canada may contact their local representative for parts and service LFXG H Technical Reference Manual Note Special instructions concerning your source holder are found in the envelope that was shipped with the source holder and the Radiation Safety for U S General and Specific Licensees Canadian and International Users manual and the Radiation Safety Manual Addendum of Reference Information CD Please refer to this document for radiation safety information
35. pt screen from the Calibration Linearizer Linearizer data Linear data collect menus and follow the prompts to enter the data 48 LFXG H Technical Reference Manual Calibration otep 4 Calculating the linearity Note The simple method of initial calibration does not use this step After collecting the data for a linearizer table the transmitter uses the data to calculate a new calibration linearizer table The Calc linearity function initiates this calculation You must perform this step before the Calculate Calibration step described in the next section Calculating a new linearizer table Calculate the linearizer after you perform the following steps e Select non linear table for the linearizer curve e Collect linearizer data Procedure 7 Calculating the linearizer iF From the Main menu select Calibrations 2 From the Calibrations menu select Linearizer 9 From the Linearizer menu select Linearizer data 4 From the Linearizer data menu select Linear data collect 5 From the Linear data collect menu select Calc linearity 6 At the prompt select Yes to proceed with the linearity calculation The linearizer table calculates based on the level values T Press F2 to save LFXG H Technical Reference Manual 49 Calibration otep 5 Calculate calibration After collecting the high and low level calibration data and calculating the linearity the level transmitter is ready to make the calibration calculation
36. setup oetting up alarms Four types of alarms are available 1 Diagnostic 2 Analog 3 Process 4 X ray The Diagnostics and Repair chapter thoroughly explains use and acknowledgement of alarms When you set up alarms the following options are available e Which alarm type triggers the output relay e Which diagnostic messages appears on the HART display screens e The output level of the analog alarm e Specialized parameters of the x ray alarm 110 LFXG H Technical Reference Manual Appendix I Initial factory setup Diagnostic alarm setup Diagnostic alarms give information about the condition of the level transmitter and can provide reminders to perform periodic maintenance procedures The reminders appear as messages on the HART screens when a HART device connects to the level transmitter In addition if the level transmitter relay is set as a diagnostic alarm the condition trips the relay on In the setup there is a list of every diagnostic alarm condition that can toggle On or Off If the condition flag is Off that condition does not cause the diagnostic alarm relay to trigger and no HART message appears The following table lists the available diagnostic alarms conditions See the Diagnostics and Repair chapter page 78 for more details Table 19 Diagnostic alarm conditions RAM corrupt Standardize due CPU EEPROM corrupt Sensor EEPROM corrupt Source wipe due Alarm Type 1 Flash corrupt New hardware found A
37. temperature uses temperature coefficients The VEGA factory determines the coefficients through rigorous testing You cannot change these values through normal operation 68 LFXG H Technical Reference Manual Advanced functions Checking the sensor voltage poll address version and serial numbers Procedure 23 Checking equipment version and serial numbers k From the Main menu select Advanced Fxns 2 From the Advanced Fxns screen select Other advanced 3 From the Other advanced screen select one of the following Sensor voltage Poll addr Firmware ver Hardware ver CPU Serial No Sensor Serial No View Temp coefs LFXG H Technical Reference Manual 69 Advanced functions oelect gauge type VEGA s nuclear density gauges use much of the hardware and software of the VEGA HART Level transmitters If your level transmitter indicates PV or Density as the process variable it was set incorrectly for a level type application Select gage type enables the users to set the software to operate as either a density or a level gage Procedure 24 Select gage type 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu choose Select gage type 3 From the Select gage type menu select Level 4 If using a HART hand held communication device press F2 to send oelect gauge location The local gauge refers to a gauge that has its sensor electronics and processing electronics all contained in the same housing Set
38. the Cal high level Determination of the Cal high level occurs during the initial calibration procedure Max level Displays the maximum level that is the value in process units as entered in the Initial setup screens Use this to calculate the measurement span Min level Displays the minimum level that is the value in process units as entered in Initial setup screens Use this to calculate the measurement span Temp comp gain Temperature compensation gain displays the current value of the temperature compensation gain Use this to adjust for inherent sensor output change with temperature Uniformity gain Uniformity gain displays the current of the uniformity gain Use this to force all level sensors to output the same counts at a given radiation field Most level applications do not use uniformity gain and have it set as default value of 1 0 oource decay gain Source decay gain displays the current value of the source decay gain Use this to compensate for the natural decay of the radiation source which produces a lower field over time otdz gain LFXG H Technical Reference Manual 55 Advanced functions Displays the current value of the standardize gain that adjusts with each standardize procedure HV setting HV setting displays the HV setting feature that is the set point for sensor high voltage Aux channel chain The display values for the Aux channel chain screen are Aux raw counts The Auxiliary raw counts field dis
39. v SSed d L wey SSEd snI WOCHE Ndo ON 9np edi N ON A enp szipsepueys SSed 1591 eqoJd dws Iosu SSeg 159 YOO SUI Ei SSed snes fJoujeuJ HSY H SSEqj snp WOdcEH J0sues SP sn Wal sonsouDelq VUJ 4 4E dH Ino AND Z zDue eq z jes Ay L snjejs oDnexy Figure 69 Gauge status LFXG H Technical Reference Manual 180 Appendix IV HART menus and screens SJJo0o dui9 Main Z Jeueg 1osues 9 ON leues n5 S al ainigioduat G JOA 9Je MpJeH p apow Sai Aelay v JOA MWI pow Sai duj xny e ag MpJeu M9U ONE uleuo leuueuo xny e SSoJppe UO d JOSU8S M has PPE Wd Sal JOSUSS Z N SS920Jgd Z UOne20 adh oDBe3 oA pow pJeoq j uueyo oDeD oe oDeD oe Josueg 159 YW D M N L AIS UU A SOOUEADE 918 MpJe AJ01SI uleyo 1 290 d peoueAp E paey Is u ey a6eb yoajas 2 a6eb yajas 9 1l9u10 S M N E XBW UI N Z SS990Jd L sux peoueApy Figure 70 Advanced Fxns 181 LFXG H Technical Reference Manual Appendix IV
40. 13 Off Unit 14 Off i Unit 15 n ADD 15 Click Change Change Setting 11 Verify all gauges are communicating as expected 5 xj Connected to Communication Tag Number ADD 15 Statistics Rs 485 Master 12 Populate the master table to continuously poll all gauges 13 Enable the RS 485 local network using the configuration program continuous communication starts Procedure 54 Setting up GEN2000 RS 485 local network continued 14 Continue to monitor the RS 485 network to verify that all of the gauges are responding as expected and that the relay is not in an alarm condition LFXG H Technical Reference Manual 151 Appendix Il Special applications 15 For each gauge on the RS 485 local network e Use the RS 485 Configuration software to configure the Responder table To Change data 1 Select Function 2 Click On any Function cell 3 Press Accept Function Uia Foren DITE ADD TOP Una 15 Van comp AccepiFunchon Me oeen e Verify that the Responder table contains all of the units required for the particular gauge e Verify the Responder table is updating tio Connected to Responder Tag Number ADD 15 Communication Read Only Address 16 D RS 486 Master D Pol Sg Pegueed Gauges C A Porte C Hone Fault Status Descrintion Mo Check Bos Selected Ur T 112 ADD TOP z IN 16 Connect to each gauge using Ohmview 2000 and setup each gauge for the partic
41. 38 Check the repeatability of measurement Checking the gauge repeatability 43 Perform Set Cal low level and Step 1 Set low level 46 Set Cal high level Step 2 Set high level 47 Collect linearizer data on Known samples Step 3 Collecting linearizer table data 47 Perform Calc linearity Step 4 Calculating the linearity 49 Perform Cal result Step 5 Calculate calibration 49 36 LFXG H Technical Reference Manual Calibration oimple method of calibration Figure 18 illustrates the steps to prepare for and perform a simple method calibration Start Are process units set No Change units in Initial setup correctly screens Yes Is linearizer set to Table NO Change linearizer to Table linear in linear Calibrations Linearizer screen Yes Is process span set No gt Change measurement span in correctly Initial setup screens Yes Perform Set Cal low level and Set Cal high level steps in any sequence in Initial cal screens Perform Cal result function in Initial cal screens Figure 18 Simple method calibration flow chart LFXG H Technical Reference Manual 37 Calibration Table 8 Simple method calibration Simple method calibration Step in flow chart Manual heading Page Check process engineering units Units 98 Check process span Span settings process span 103 Check linearizer type set to linear table Choosing the linea
42. 4 In the Tag screen enter the eight digit identifier for the instrument 5 Press F4 to enter 6 Press F2 to send the updated parameters to the transmitter 108 LFXG H Technical Reference Manual Appendix Initial factory setup System information Message Use this text field to record information or messages For example this is where you can record a message to operators or notes about the gauge Procedure 40 Setting the system information message 1 From the Main menu select Initial setup 2 From the Initial setup menu select System parameters 3 From the System parameters menu select System info 4 From the System info menu select Message o In the Message screen enter messages or notes for the operator 6 Press F4 to enter T If using a hand held HART communicator press F2 to send the updated parameters to the transmitter Descriptor This is a shorter message field to record information or messages Procedure 41 Setting the descriptor 1 From the Main menu select Initial setup 2 From the Initial setup menu select System parameters 3 From the System parameters menu select System info 4 From the System info menu select Descriptor 9 In the Descriptor screen enter a short message or note for the operator 6 Press F4 to save Tf If using a hand held HART Communicator press F2 to send the updated parameters to the transmitter LFXG H Technical Reference Manual 109 Appendix Initial factory
43. 5 Procedure 26 Viewing and acknowledging diagnostic alarms 76 Analog 77 Process 77 X ray 78 Auxiliary x ray alarm system 78 Figure 24 X ray interference alarm output 78 Hardware diagnostics 79 Figure 25 GEN2000 circuit boards 79 Figure 26 GEN2000 circuit board components simplified 80 Test points 80 Table 12 Power supply board test point labels and descriptions 80 Table 13 CPU test point labels and descriptions 80 Jumpers 81 Table 14 Jumper settings 81 LED indicators 82 Figure 27 LED indicators 82 FLASH corrupt LED pattern 83 Table 15 Power supply board LED summary 83 Power Supply Board LED summary table 83 CPU Board LED summary table 84 Table 16 CPU board LED summary 84 Troubleshooting 85 Communication problem flowchart 86 Figure 28 Communication problem flowchart 86 Transmitter not responding flowchart part 1 87 Figure 29 Transmitter not responding flowchart Part 1 87 Transmitter not responding flowchart part 2 88 Figure 30 Transmitter not responding flowchart part 2 88 Maintenance and repair 89 Periodic maintenance schedule 89 Table 17 Periodic maintenance schedule 89 Source wipe and shutter check recording 89 Recording a source wipe or shutter check 89 Procedure 27 Recording a source wipe or shutter check 89 Check when the next source wipe or shutter check is due 90 Procedure 28 Check due date of source wipe or shutter check 90 Spare parts 90 Field repair procedures 91 Replacing the CPU or Power supp
44. 51 Calibrating with NORM compensation 137 GEN2000 Local RS 485 Network 138 Installation requirements 139 Figure 42 Typical installation vapor compensation amp auto zero 139 Detector wiring 140 Figure 43 Interconnect GEN2000 RS 485 multiple detectors transmitters 140 Software 141 Figure 44 Ohmview 2000 Launcher program 141 Figure 45 Ohmview 2000 RS 485 main screen 142 Figure 46 RS 485 Master Main menu screen 143 Responder Gauge Data 144 Figure 47 RS 485 Responder gauge data screen 144 Responder Function 145 Figure 48 RS 485 Responder Function screen 145 Figure 49 Responder function pull down menu 146 Procedure 52 Changing the Responder unit function 146 Communication Statistics 147 Figure 50 RS 485 Communication Statistics screen 147 Master Configuration 148 Figure 51 RS 485 Master Configuration screen 148 Responder Main menu 149 Procedure 53 Connecting directly to a Responder 149 Figure 52 Responder Main Screen 149 Initial setup 150 Procedure 54 Setting up GEN2000 RS 485 local network 150 Procedure 54 Setting up GEN2000 RS 485 local network continued 151 Procedure 54 Setting up GEN2000 RS 485 local network continued 151 Auto Zero feature 153 Setting up the Auto Zero feature 153 Procedure 55 Setting up GEN2000 RS 485 local network 154 Procedure 55 Setting up GEN2000 RS 485 local network continued 155 Vapor pressure compensation 156 Figure 53 Vapor compensation system 156 Installation requirements 157 Detector wi
45. 7 Appendix IV HART menus and screens uone nuis g uoneoo oDeJolsS p Od 104 ueisr1 uoineulJoJu Wa sks Z dIUNWWO4 ainBijuoyd AINN 9UOU 9JnssaJgd ouou ouenboJJ 991Ao q KoueanboJJ punoj 99IA9p ON eujuo pejoeuuoo JOU JO ILUSUeL nuo J weibolg 1HVH Figure 55 HAHT screen Transmitter not connected H Technical Reference Manual LFXG 168 Appendix IV HART menus and screens SuXJ peoueApy Y snjej oDneo c SUOUEIOIE z One Eu nusw uie N VW HH Ino IND Z Jo H HH 9 9 LU pejoeuuoo z usuel S9oJn e9J u89J9s LUH Figure 56 HART screen Online 169 LFXG H Technical Reference Manual Appendix IV HART menus and screens oju Up G 9 9 vuit t Se sue y uonpunj 9 9 WWOT eoJnog Duue1H uomne
46. Auxiliary Q per local codes Power r Earth ground 7 frequency p bi EE ALLL A LLLI input i m re oa d Housing ground l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l l Cenelec Ground l l l l l l l l l cl Control Room SYSTEM ARCHITECTURE Optional mode Output sgnal N K mA input DCS Hand held erminal Optional handheld terminal Figure 54 Interconnect DSGH with LFXG H LFXG H Technical Reference Manual 157 Appendix Il Special applications Algorithm for vapor comp The vapor compensation algorithm adjusts the percent span based on a percent change in vapor density from a reference density Refer to the Calibration chapter for a complete discussion of continuous level gauge calibrations Each time the gauge computes a level measurement a new Cal low counts value calculates which changes the percent span The algorithm for calculating the cal low counts is New cal low counts cal low counts 1 vc gain change in vapor density counts Where change in vapor density counts reference counts vapor density counts reference counts Variable definitions Reference counts Reference counts are counts from DSGH at reference pressure condition determined during first step of calibration Vapor density counts Vapor density counts are counts from DSGH at current pressure condition
47. Function Configuration Oe x Responder Function Configuration To Change data Select Function 2 Click On any Function cell 3 Press Accept Function Auto Zreo Thershold D 22300 Mat used Mat used Mat Used Summation Vapor Comp Auto ero External 5umm Bu Bu Accept Theshald Unit 4 Mot used Unit 5 Mot used Unit 6 Mot used Unit Mat used Unit 8 Mat used Unit 3 Mat used Unit 10 Mat used Writ 11 Auto era LEVEL Unit 12 Mat used Unit 13 Not used Unit 14 Mat used Unit 15 Mat used TESTGAGE AcceptFunctian Mains creen Figure 48 RS 485 Responder Function screen The functions available for each responder are e Not Used e Summation e Vapor Comp e Auto Zero e External Summation LFXG H Technical Reference Manual 145 Appendix Il Special applications To Change data 1 Select Function 2 Click On any Function cell 3 Press Accept Function Unit Function Unit 1 Not used Not Used Unit 2 Not used Vna Unit 3 Auto Zero Ate zen P Unit 4 Not used teil Unit 5 Not used Unit 5 Not used Unit 7 Summation ADD TOP Unit 8 Not used Unit 3 Not used Not used Not used Unit 13 Not used Unit 14 Not used AcceptFunction MainScreen Figure 49 Responder function pull down menu To change the function for a unit perform the following steps Procedure 52 Changing the Responder unit function 1 Select the Function cell next to the un
48. H JOA 94 MULIH E APPe 19d c A H aHeyor 4osues peoueApe 49410 Figure 75 Other advanced H Technical Reference Manual LFXG 186 Appendix IV HART menus and screens jsueq 9 9 d eDeD BuipeooJd eJ0Jeq jenuew ess uorjeJjedo eDe6 soeDueup Ajeueuepun ed off BuiDBueu9 NOLLNWD d oDeD ypajes Figure 76 Select gage type 9 O0UJ8M 2007 uoneoo eDeD ayes BuipeoouJd eJ0Jeq jenuew ess uorjejedo eDe6 soDueup je1ueuuepun uorjoo e6e5 BuiBueyo NOLLNWD 1 290 a6eb p Figure 77 Select gage location 187 LFXG H Technical Reference Manual Appendix IV HART menus and screens Notes 188 LFXG H Technical Reference Manual Index count range 54 process span 54 20mA Level 105 4mA Level 105 active area between mounting brackets 22 Adj counts 54 Advanced Functions 53 Advanced Fxns 53 alarm analog alarm 113 setup 110 Alarm out 2 mA alarm setup 113 Alarm out 22 mA alarm setup 113 Ammeter 33 analog alarm selecting 2mA or 22mA 113 analog output See current loop output applications 6 Auto Zero feature 153 Aux channel chain 56 Aux input test 61 Aux min max 56 Aux raw counts 56 auxiliary input 119 Auxiliary input test mode 65 Cable length 25 size 25 Calcul
49. MRA before returning any equipment to VEGA VEGA reserves the right to refuse any shipment not marked with the MRA number LFXG H Technical Reference Manual 95 Diagnostics and repair Notes 96 LFXG H Technical Reference Manual Appendix I Initial factory setup Perform all setup functions from the Initial setup menu These functions include the following e Process parameters e System parameters e Alarms e Auxiliary inputs e Spans setup Perform setup before the initial calibration since some parameters are necessary for calibration Some of these parameters are e Units e Data collect times LFXG H Technical Reference Manual 97 Appendix Initial factory setup Process parameters Units Level units The following engineering units are available for a level measurement In inches ft feet cm centimeters mm nmillimeters m meters Jo percent Spcl special used in conjunction with Custom units below Custom units You can program a custom unit if the unit you require is not in the standard list Choose the unit Spcl Special from the Units screen Enter the numeric conversion factor in the form 98 x custom units inch setting the process units Procedure 31 Setting the process units From the Main menu select Initial setup From the Initial setup menu select Process parameters From the Process parameters menu select Process units From the Process units menu selec
50. P Unit 8 Off Unit 9 Off Unit 10 Off Unit 11 n ADD 11 Double click to toggle On or Off Un ADD 15 Change Setting MainScreen Click to change poll cattinne Figure 51 RS 485 Master Configuration screen 148 LFXG H Technical Reference Manual Appendix ll Special applications Responder Main menu To setup and test a specific responder unit connect the HART modem jumpers anywhere along the 4 20 mA output Procedure 53 Connecting directly to a Responder 1 Open Ohmview 2000 Launcher 2 Select the communication port number that connects to the HART modem 3 Click Connect The Responder Main Menu screen displays Main Screen E Bl x Connected to Main Screen Tag Number ADD TOP RS 485 Responder Port Selection fi Disconnect Responder Function Figure 52 Responder Main Screen The following choices are available on this menu e Responder Gauge Data see page 144 e Responder Function see page 145 e Connect or Disconnect Click to connect or disconnect from gauge e Exit Click to close program LFXG H Technical Reference Manual 149 Appendix Il Special applications Initial setup Perform the following steps to set up the GEN2000 RS 485 local network Procedure 54 Setting up GEN2000 RS 485 local network 1 Check the wiring connections for power network and analog output for all gauges 2 Disconnect the RS 485 network from the master gau
51. PU Board LED summary table Table 16 CPU board LED summary Normal condition OFF ON blinks when receiving HART messages Blinks at rate of 1 time per second Blinks if auxiliary input present OFF if no auxiliary input present ON high voltage is in spec Cycles in proportion to radiation field intensity at detector ON for 10 seconds for each mR hr then off for two seconds Can use LED 5 that blinks 1 time sec to time LED 9 for field indicator Error condition 1 blink CPU EEPROM corrupt 2 blinks Sensor EEPROM corrupt 3 blinks Both EEPROMs corrupt 4 blinks RAM corrupt 5 blinks Memory mismatch ON solid combination of errors None LED does not blink CPU not functioning None OFF high voltage is out of spec None Recommendation Check software diagnostics Call VEGA Field Service Check HART device connection on loop and HART device functioning Check power input Replace CPU board Check auxiliary input wiring terminals 11 and 12 witha meter for frequency signal Check auxiliary input equipment Call VEGA Field Service A 1mR hr 2 580nC kg hr field is usually required for a measurement Check for closed source shutter buildup amp insulation LFXG H Technical Reference Manual Diagnostics and repair Troubleshooting Use the following flow charts to determine the source of a problem They cover three topics e HART communication problems e LFXG H transmi
52. S ZE JEP Oye Zp IS SS8001d Figure 65 Process stdz HHH SJUNOD ON c SOA L elep oye enje paeJrsep 0 sseooud Ee HHH SJUNOD Hall ejeq Figure 66 Data collect ON c SOA 1 W 99U9J9J9J 0 ne vuugo oe 1ndino ep pH HH ONICA J9 9UJ OI ON C SOA ZIL 99U9J9J9J O lenb vuugo gp 1ndino een pH ii ONICA J9 9UJ OI J U e2u8JeJeJ JOOUUOD Eo doot uang Figure 67 Current loop Cal H Technical Reference Manual LFXG 178 Appendix IV HART menus and screens ON C S A L uonenojeo Aueeui uj peeooJgd Ayeaull 9je2 y TEE dH Ul npea ID S UNOO MAU Ip jd eyep mou ppy HHHH HH U npea a S UNOO m u Ip LICH a3mmaz jutodejeq DEON L Y TE TE TE TE NLA siuno Sjdeje SE SE i adis ype E Hier 1utodejeq ij c HH TE HHHH H uiodejep Ce ideoov HH ONIEA oi ul enjeA ndul Ee 96007001 01 Q wou 95G8z Aana ueds 1ueoJed 1p3 Do ejep Eau Z Jeeui uou e qe Jeeui e qe
53. Screen ag Number ADD 15 Address 15 RS 485 Master Port Selection E DI Responder Gauge Data Responder Function Comm Stats Master Configuration Exit Master jumper setting Master should not Figure 46 RS 485 Master Main menu screen The Main menu for the master contains the following selections e Connect or Disconnect Click to connect or disconnect from the gauge e Responder Gauge Data see page 144 e Responder Function see page 145 e Comm Stats see page 147 e Master Configuration see page 148 e Exit Click to exit program LFXG H Technical Reference Manual 143 Appendix Il Special applications Responder Gauge Data This screen displays the units and the counts for each Responder gauge as selected If a unit does not display a count it has not been set up to do so or is not on the network Responder Communication O x Connected to Responder Tag Number ADD 15 Communication Read Only Address 15 D RS 485 Master m Poll Status Display Required Gauges Unit 1 Li C All Possible m CN 0 0 Kl sid E Fault Status Description No Check Box Selected r 11 2 ADD7_TOPI e r 337 P r e MainScreen Figure 47 RS 485 Responder gauge data screen 144 LFXG H Technical Reference Manual Appendix ll Special applications Responder Function Use this screen to select the function for different units F Responder
54. Technical Reference Manual LFXG FiberFlex Detector with GEN20009 Electronics for Level Measurement Document ID 31401 Nuclear E Revision history Table 1 Hevision history Initial release Formerly 240694 051201 Electronics Revision 090309 Added certification information and IECex label 090819 Changed company name logo and website 110301 Copyright 2011 VEGA Americas Inc Cincinnati Ohio All rights reserved This document contains proprietary information of VEGA Americas Inc It shall not be reproduced in whole or in part in any form without the expressed written permission of VEGA Americas Inc The material in this document is provided for informational purposes and is subject to change without notice FiberFlex amp is a registered trademark of the VEGA Americas Inc VEGAView and Ohmview 2000 are registered trademarks of the VEGA Americas Inc HART is a registered trademark of The HART Communication Foundation ISO 9001 approval by Lloyd s Register Quality Assurance Limited to the following Quality Management System Standards ISO 9001 2000 ANSI ASQC Q9001 2000 Approval Certificate No 107563 VEGA Americas Inc 4170 Rosslyn Drive Cincinnati Ohio 45209 1599 USA Voice 513 272 0131 FAX 513 272 0133 Web site www vega americas com WARNING Use this equipment only in the manner that this manual describes If you do not use the equipment per VEGA specifications t
55. You are unable to secure the lock The operating handle does not properly move into the off position 2 LFXG H Technical Reference Manual Introduction Note Low activity source holders have different requirements than the typical source holders For example since they usually do not have shutters the shutter check test is not required Contact VEGA for further information regarding the low activity source holders otoring the equipment otoring the source holder If it is necessary to store the source holder do so in a clean dry area Be sure the source holder shutter is in the OFF or CLOSED position Check the current local regulations U S NRC Agreement State or other to determine if this area must have any restrictions otoring the detector Avoid storage at temperatures below freezing Store the detector indoors in an area that has temperature control between 10 C and 35 C 50 F and 95 F and less than 50 relative humidity Store equipment in dry conditions until installation Certifications This gauge is designed for certi cation compliance from the following agencies e ATEX Standard e CCOE India e CEPEL INMETRO Brazil e CSA e FM Standard e GOST B Standard e GOST R Standard e IECex e JIS Japan e KTL Korea e NEPSI China LFXG H Technical Reference Manual 3 Introduction oafety Information for EX Areas Please note the EX speci c safety information for installation an
56. a process alarm relay high or low level alarm you can install an override switch to manually deactivate the alarm If you do not install an override switch the process alarm relay de energizes only when the measured level is out of the alarm condition The function of the output relay is set in the Alarms screen from the Initial Setup menu Conduit Conduit runs must be continuous and you must provide protection to prevent conduit moisture condensation from dripping into any of the housings or junction boxes Use sealant in the conduit or arrange the runs so that they are below the entries to the housings and use weep holes where permitted You must use a conduit seal off in the proximity of the housing when the location is in a hazardous area Requirements for the actual distance must be in accordance with local code If you use only one conduit hub plug the other conduit hub to prevent the entry of dirt and moisture 26 LFXG H Technical Reference Manual Installation Commissioning the gauge The process of commissioning the gauge includes the following e Taking appropriate radiation field tests e Checking the pre programmed setup parameters e Calibrating on process e Verifying the working of the gauge VEGA Field Service Engineers typically commission the gauge It is necessary to remove the source holder lock the first time the gauge takes measurements in the field Only persons with a specific license from the U S NRC Agr
57. a set point energizes the relay Process alarms only work in conjunction with the output relay No HART messages post that relate to the process alarm You cannot use a relay as a diagnostic or x ray alarm if you have set it as a process alarm Table 21 Process relay set alarm conditions Relay action limit High limit Relay action limit Low limit Relay setpoint 96 114 LFXG H Technical Reference Manual Appendix Initial factory setup oetting up the process alarm Procedure 45 Setting up the process alarm 1 From the Main menu select Initial setup 2 From the Initial setup menu select Alarms 3i From the Alarms menu choose Set relay function 4 From Set relay function menu select Process and press F4 to enter 5 Press the LEFT ARROW key to return to the Alarms menu 6 From the Alarms menu select Mode configuration 7 From the Mode configuration menu select Process relay set 8 From the Process relay set menu select Relay action 9 From the Relay action screen select either High limit or Low limit 10 From the Process relay set menu select Relay setpoint 11 From the Relay setpoint screen enter the numeric value of the alarm setpoint in process units and press F4 to enter when finished entering the value 12 If using a hand held HART communicator press F2 to send the setting to the transmitter LFXG H Technical Reference Manual 115 Appendix Initial factory setup X ray alarm setup The x ray al
58. anual Normal Alarm l HART name Error message Problem description Recommendations RAM status Pass RAM corrupt There has been a corruption Repeated triggering of this alarm indicates a Fail of the RAM memory It has possible hardware problem been resolved internally Sensor Pass Sensor Non critical memory To check if the problem is recurring EEPROM Fail EEPROM corruption has occurred on acknowledge the alarm and then cycle power status corrupt the CPU board EEPROM and to the unit may not have been resolved If alarm occurs again it indicates a hardware internally problem See page 93 Real time Pass Real time The clock has failed This Note You must reset the time and date if the clock test Fail clock fail can result in a miscalculation LFXG H was without power for the past 28 of timed events days To resolve try to reset the time and date If it does not reset call VEGA Field Service Sensortemp Pass Sensortemp The sensor temperature Check the sensor temperature on the probe test Fail probe fail probe may not be functioning Advanced Fxns Process chain Primary channel This can result in erroneous screen If the temperature reads 0 5 C measurements constantly the probe is broken and the sensor assembly may need replacement Standardize Nol Standardize A standardize procedure is Alarm acknowledges when you complete the due Yes due due process standardize procedure in the Calibrations Process stdz screen Source wipe Nol Source w
59. apor Compensation 156 VEGA Customer Service 7 Field Service 7 VEGA Field Service 1 94 VEGAView 11 VEGA View software 192 VEGA View Software 13 15 version numbers 68 vessel agitators effect 20 View settings screen 32 Wipe interval 107 x ray alarm 78 setting parameters 117 setting relay as 118 LFXG H Technical Reference Manual VELA VEGA Americas Inc 4170 Rosslyn Drive Cincinnati Ohio 45209 USA Phone 1 513 272 0131 Fax 1 513 272 0133 E mail americas vega com www vega americas com All statements concerning scope of delivery application practical use and operating conditions of the sensors and processing systems correspond to the information available at the time of printing VEGA Americas Inc Cincinnati Ohio USA 2011 Subject to change without prior notice 31401 US 110301
60. ard EEPROM with the information in the sensor board EEPROM Perform the memory back up in the Advanced Fxns New hardware screen 92 LFXG H Technical Reference Manual LUV OD GOOD d d qe eS 10 11 12 13 14 15 Diagnostics and repair Replace the CPU or Power supply board Procedure 29 Replacing the CPU or power supply board Shut off the power to the LFXG H Remove the housing cover Remove the plastic electronics cover Remove the terminal wiring connector Remove the three 3 screws holding the electronics package in place Carefully pull the electronics package out of the housing Remove the appropriate board from the clamshell assembly by removing the Note If you are changing the CPU board you must move the old firmware chip Carefully reconnect any ribbon cables Install the electronics package in the housing Replace the three 3 mounting nuts Reconnect the terminal wiring connector Install the plastic electronics cover Install the housing cover Turn on the power to the unit Connect a HART communicator to the unit and verify that the unit is operational Note If you change the CPU board a New Hardware Found error message displays when you connect with the HART communicator This is normal Follow the procedure on page 59 for installing new hardware so that the non volatile memory on the CPU can configure properly Mounting Nuts LFXG H Technical Reference Manual 93 Diagnostics and repair
61. arm compensates for false indicated process values that occur when external radiographic sources the gauge detects Vessel weld inspections often use portable radiographic sources Detection of x rays by the gauge causes a false low reading and adversely affects any control based on the gauge output The x ray alarm distinctly changes the current loop mA output in response to a marked increase in radiation field It can also trigger the output relay if set up to do so When the gauge detects a radiation field above a set threshold as a percentage of the cal low counts value it sets the current loop output at its value 10 seconds before the detection of the x ray interference It periodically dithers the output about the average cycling until the radiation field is back to the normal level or until a time out period of 60 minutes See the following figure for a diagram of the current loop output in x ray interference mode 8 88 output 10s before Y E Ek Dither level I PAPER SE time ms Dither time i Cycle period Figure 33 X ray interference alarm output Note Only VEGA Field Service can adjust the time out period of 60 minutes and the reversion to 10 seconds before the x ray detection In the Initial setup screens you can adjust the parameters shown in Figure 33 The parameters are Threshold Threshold is the percentage beyond the calibration low counts that triggers x ray interference suppression D
62. ate linearity 49 calibration current loop analog output 32 initial simple method of 37 initial standard method of 35 Calibration 31 initial 44 results 50 standard or simple 34 Calibrationtable 45 CE compliance 25 Changes process vessel 51 Commissioning 27 Communication 26 Conduit 26 Counts high 55 Counts low 55 CPU 58 new board 59 CPU board jumpers 81 replacing 92 CPU EEPROM corrupt 60 alarm acknowledge 75 alarm setup 111 in diagnostic history 74 CPU EEPROM status diagnostics check 75 LFXG H Technical Reference Manual CPU serial number 68 current loop calibrating on the bench 19 calibration 32 power source or sink mode 81 span 105 current loop output test mode 61 custom units 98 Customer Order C O Number 7 required for repairs 94 Cycle period 116 alarm setup 117 Damping 102 Data collect 43 Data collection interval 99 using data collect on sample to check interval 43 Date 106 Default standardize level 100 Descriptor user defined in System information 109 device description 12 diagnostic alarm setting relay as 112 diagnostic history 74 Dither level 116 alarm setup 117 Dither time 117 alarm setup 117 drawings 123 EEPROM 58 corrupt 59 EEPROM corruption repair 60 Equipment wiring 23 Fast response cutoff 102 Field service See Ohmart Customer Service Field Service checklist 30 filtering 101 damping 102 fast response cutoff 102 of auxiliary in
63. ation Increasing the process span usually increases the gauge accuracy Before starting the cal low data collection mo Fill vessel to its low level m Have actual level value ready to enter oetting the cal low level Procedure 4 Setting the cal low level 1 From the Main menu select Calibrations 2 From the Calibrations menu select Initial cal 3 From the Initial cal menu select Two point cal 4 From the Two point cal menu select Set Cal low level 5 The prompt Set process to desired value Take data displays Select Yes to enable the data collection to take place The on screen counter displays the time left If necessary press F3 to discontinue data collection 6 After collection of the data the screen prompts you to input the actual value Input the actual value in engineering units T If using a hand held Communicator press F2 to send the calibration setting to the level gauge 46 LFXG H Technical Reference Manual Calibration otep 2 Set high level Setting the high level for calibration requires the following activities e Measurement with the level transmitter of the high process condition e Entry of the actual level This sets the gain of the calibration curve Perform this procedure either before or after setting the low level Note You must perform data collection for the low and high level within ten days of each other for a good calibration The low and high values must be more than 10 perce
64. bration parameters 1 From the Main menu select Initial setup 2 From the Initial setup menu select Process parameters 3 From the Process parameters menu select Cal parameters 4 From the Cal parameters menu select the calibration parameters to view or edit as needed Refer to the help screens F1 or page 99 in this manual for descriptions View or edit the following parameters e Data coll interval e Warn cal span e Process stdz type e Default std e Stdz interval B If using a hand held HART Communicator press F2 to send the updated calibration parameters to the transmitter 100 LFXG H Technical Reference Manual Appendix I Initial factory setup Filtering This feature enables change to the response time of the system by increasing or decreasing the averaging time that is used to filter the noise in the signal An increased time for averaging enables the accumulation of a greater number of readings and therefore produces a greater statistical accuracy However this is at the expense of response time to changes in the process Type RC exponential or rectangular window The level transmitter offers a choice of signal filters RC exponential or rectangular window The level transmitter has a sample rate of about 1 sample second but process variables generally change measurably on the order of minutes Electrical and source noise occur on the order of seconds so they can be filtered out with a low pass filter leav
65. cess chain 55 LFXG H Technical Reference Manual Appendix IV HART menus and screens source holder 9 Source holder new 51 source holder lock 27 Source type 107 source wipe alarm setup 111 frequency 89 recording when complete 89 setting the interval 107 source wipe due alarm acknowledge 75 diagnostics check 75 in diagnostic history 74 span current loop analog output 105 process 104 setup 104 with multiple detectors 129 spare parts 90 frequency output detectors 124 specifications heater kit changes 162 LFXG H 5 Standardization auto reminder 51 periodic 51 standardize due alarm acknowledge 75 alarm setup 111 diagnostics check 75 in diagnostic history 74 standardize gain 51 Standardize gain 51 displayed in process chain 55 Standardize interval 100 Standardizing gauge 52 Status Error 61 Stdz standardize counts 54 storage 3 System parameters 106 Tag 108 TC temperature compensated counts 53 Temp sensor temperature 53 Temp comp gain 55 temperature coefficients 68 Temperature test 61 Temperature test mode 67 Terminal 25 Terminals jumpers 25 Test modes 61 Threshold 116 alarm setup 117 Time 106 time and date failure after extended power down 106 re set if extended power down 19 Uncompensated level 55 Uniformity gain 55 units 98 vapor compensation calibrating 160 setting up 159 191 Index Vapor compensation 158 installation requirements 157 V
66. constant that is the amount of time in seconds that it takes for the gauge reading to achieve 63 2 of a step change in process A range of integer values from 1 600 seconds is possible for this time constant entry With the rectangular window filtering the damping entry determines how many samples to use when calculating the average responding to 10096 of a process step change The maximum damping entry is 100 with this type of filtering Fast response cutoff Fast response cutoff temporarily bypasses the RC or digital filtering when the change in process exceeds this value in engineering units between successive samples This enables the level transmitter to respond immediately to large step changes while filtering the smaller variations in the signal caused by noise and normal process variations To turn off the fast cutoff filter set the value to zero 102 LFXG H Technical Reference Manual Appendix I Initial factory setup selecting a filter type damping and fast cutoff Procedure 34 Selecting a filter type damping and fast cutoff 1 From the Main menu select Initial setup 2 From the Initial setup menu select Process parameters 3 From the Process parameters menu select Filtering 4 From the Filtering menu select Filter type 5 On the Filter type screen the currently used filter type displays as either RC Exp Filter or Rect Window Filter To change the filter type select either RC Exp Filter or Rect Window Fi
67. d operation in EX areas Ex ee ELE MAR 2000 CINCINNATI OHIO U S A 45209 Patent No 6 198 103 GEN2000 IECEx CSA 09 0005X MODEL INPUT 115V 25 W 50 60 Hz CONTACT RATINGS 240VAC 2A OR 24VDC 2A OR 1 4HP 120VAC Ex d IIC T6 Ta 20 C TO 60 C OR Ex d IIB H2 T6 Ta 50 C TO 60 C IP66 WARNING USE A CABLE OR WIRING RATED FOR AT LEAST 90 C WARNING POTENTIAL ELECTROSTATIC CHARGING HAZARD SEE INSTRUCTIONS WARNING DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE MAY BE PRESENT Figure 3 IECex Label 4 LFXG H Technical Reference Manual Introduction LFXG H specifications Table 3 LEXG H specifications System Accuracy Active Lengths Typical Sources Power Requirements Signal Cable GEN2000 Electronics Housing Weight Current Loop Output Relay Output HART Communication Auxiliary Input Capability Electronics Diagnostics 1 of span typical Flexible detector Cesium 137 Cobalt 60 AC DC Wiring Maximum length HART signal 4 wire hookup with DC Certification to CSA and UL standards CENELEC certification Enclosure rating Ambient temperature Humidity Vibration Material Paint Housing detector Rating Power Software user settable Rating HART Protocol PC interface Optional hand held interface Type Possible function On board memory Real time clock LED indication Accuracy depends on specific application parameters 305 7 010
68. ding tanks e Wet wells 6 LFXG H Technical Reference Manual Introduction Where to find help If you need help finding information check the Index and Table of Contents within this manual In addition the gauge has Help screens that you can view using the universal hand held terminal VEGA View or Ohmview 2000 software These help screens are useful references for definitions of parameters and hints VEGA Customer Service VEGA Customer Service has Field Service Engineers located across the U S for on site service to U S and Canada In many cases a Field Service Engineer is at your plant for the start up of your gauge In addition Field Service Engineers regularly assist customers over the phone If you have a question or need help call Customer Service during office hours If your problem is an emergency for example line shut down because of VEGA equipment you can reach us 24 hours a day Table 4 Contact information VEGA Phone 513 272 0131 VEGA FAX 513 272 0133 In addition VEGA provides field service for customers outside the U S and Canada Customers outside the U S and Canada can also contact their local VEGA representative for parts and service When calling with a question if possible please have the following information ready H VEGA Customer Order C O Number Locate on the engraved label on the source holder H Sensor serial number Locate on the sensor housing inside the external housing
69. dix Il Special applications Calibrating with vapor compensation Before calibrating make sure the vapor compensation option is set up see Procedure 56 Note To calibrate the vapor pressure compensation system you must be able to adjust both the product level and the vapor pressure Calibrating with vapor compensation Procedure 57 Calibrating with vapor compensation 1 Set the vapor pressure to a typical pressure this is the reference pressure At this point the product level is not important as long as the density gauge is not blocked by the product 2 From the Main menu select Initial setup 3 From the Initial setup menu select Auxiliary input 4 From the Auxiliary input menu select Vapor 5 From the Vapor menu select Aux data collect This determines the reference counts for the vapor compensation algorithm 6 At the prompt select Yes to take data When data collection is complete select Yes to save the vapor pressure reference counts T If using a hand held HART Communicator press F2 to send the settings to the transmitter 8 Return to the Main menu 9 Follow the procedures for performing a Two point calibration and linearizer curve from the Calibration chapter of this manual e These procedures require changing the product level from minimum to maximum and collecting data e During the calibration and linearization procedure maintain the reference pressure in the headspace 10 Complete the li
70. e If necessary you can install a process alarm override switch to manually turn off an annunciator when the level transmitter relay energizes LFXG H Technical Reference Manual Tf Diagnostics and repair X ray This alarm compensates for false indicated process values that occur when the gauge detects external radiographic sources For example vessel weld inspections often use portable radiographic x ray sources X rays that the gauge detects cause a false low reading and adversely affect any control based on the gauge output The x ray alarm can perform the following actions e Alter the current loop output to indicate the alarm condition e Trip the output relay if the relay is set up to do so The LFXG H alarms when it detects a radiation field above a set threshold The gauge sets the current loop output at its value 10 seconds before the condition It periodically dithers the output about the average cycling until the radiation field is back to the normal level or until a time out period of 60 minutes The standard x ray alarm only triggers when the counts are greater than the cal low count value These counts are found on the process variable menu If the x ray source is setup so that the counts increase but do not go above the cal low counts the x ray alarm does not trigger and the gauge reads the x ray interference as a true process shift Auxiliary x ray alarm system This alarm detects x rays that are causing process change
71. e linear Use this option for a simple method calibration This option enables you to use a linear straight line set of data for a linearizer look up table You do not need to collect linearizer table data points The straight line linearizer calculates from the high and low level initial calibration points This requires you to perform the following e Two point calibration e Calculate the calibration This is not as accurate because it does not compensate for the non linearity of a radiation transmission measurement 42 LFXG H Technical Reference Manual Calibration Choosing a linearizer method Procedure 2 Choosing a linearizer method 1 From the Online menu select Main menu 2 From the Main menu select Calibrations 3 From the Calibrations menu select Linearizer 4 From the Linearizer menu choose Select linearizer o On the Select linearizer screen the currently used linearizer is displayed on the second line 6 From the Select linearizer screen select either e Table non linear e Table linear T Press F4 to enter Refer to Appendix III for further instructions if you choose the Table linear option Checking the gauge repeatability Check the level transmitter measurement repeatability before performing the calibration Access the Data collect function in the Data Collect screen from the Calibrations menu to enable simple measurement of the process without altering the calibration or standardization
72. e A cast or welded steel device that houses a radiation emitting source capsule e Directs the radiation in a narrow collimated beam through the process vessel e Shields the radiation elsewhere e The model chosen for each particular system depends on the source capsule inside and the radiation specification requirements e A shutter on the source holder either completely shields the radiation source off or allows it to pass through the process source on C Figure 5 Typical source holder LFXG H Technical Reference Manual 9 Introduction Scintillator model LFXG H The following statements describe the functions of the FiberFlex flexible detector assembly model LFXG H 10 Mounts opposite the source holder Inside the flexible detector is a scintillation material The scintillation material produces light in proportion to the intensity of its exposure to radiation A photomultiplier tube detects the scintillator s light and converts it into voltage pulses The microprocessor receives these voltage pulses after amplification and conditioning by the photomultiplier tube The microprocessor and associated electronics convert the pulses into a calibratable output Terminal Block Lu Power Supply oS Board RS 485 Ground if applicable i CPU Board 3 nternal Housing A Ground Screw Figure 6 LEXG H exploded view LFXG H Technical Reference Manual Introduction Communicating with the gauge
73. e auxiliary data collect and gain adjustment steps until the auxiliary channel counts are within 10 of the primary sensor counts If using a hand held HART communicator press F2 to send the settings to the transmitter Follow the procedures for performing a Two point calibration and linearizer curve from the Calibration chapter of this manual These procedures require changing the product level from minimum to maximum and collecting data Complete the linearization and calibration with the procedures Calculate linearity and Calculate calibration See pages 49 and 50 LFXG H Technical Reference Manual 137 Appendix Il Special applications GEN2000 Local RS 485 Network This feature supports gauging systems that require two or more measurement systems that interact to provide a single compensated measurement The RS 485 network has the following gauge types e Master e Responder The gauges use the half duplex RS 485 communication network The gauges transfer specific information between each other in the field with only the master gauge actually communicating with the control room The master gauge has the following features e Initiates all communication on the network e Keeps a list of expected gauges on the network and cycles through each gauge requesting a response e Update the tag count information from the responder gauges and track the network health The responder gauges have the following features
74. e installed refer to Appendix I Initial Factory Setup to enter the correct parameters Proceed to the Calibration chapter for instructions to calibrate the gauge LFXG H Technical Reference Manual 163 Appendix lll Retrofitting HART electronics Use the following table to record data from the Smart Pro Table 26 Smart Pro data record Corresponding Smart Pro parameter Smart Pro screen item Value HART parameter Standardize parameter 520 25 Standardize parameter 520 26 Process low value Low sample input 520 32 Cal low level Process high value High sample input 520 33 Cal high level Cal low counts 520 39 Counts low Cal high counts 520 40 Counts high Time constant 527 0 Filter Fast response filter chrontrol 527 1 Threshold Span 527 2 N A Output min 527 10 4 mA level Output max 527 11 20 mA level Linearizer curve On Off 528 41 N A Low product value 528 42 Min level High product value 528 43 Max level Use Table 27 to record the linearizer table information Transferring this information makes a new initial calibration procedure unnecessary If you prefer to do a new initial calibration refer to the Calibration chapter of this manual for instructions To calculate the new value to enter into the HART version linearizer table divide the Smart Pro value of each point by 100 For example if the Smart Pro value of point 2 is 630 enter 6 30 as the corresponding HART 5 0 point 164 LFXG H Technical Refer
75. ecial applications Procedure 55 Setting up GEN2000 RS 485 local network continued k v on 2 0 0 0 Main Screen Click Responder Function Port Selection fi Disconnect Responder Gauge Data Responder Function Select Responder and Enter the Auto Zero SetPoint and Calant Arita Zarna click Accept Threshold bn 2 Click On any Function cell 3 Press Accept Functio ES ulo reo Tharshold used Ma Used RAT22900 e m Mel use surrender TF de Accept Thashoki Ura 4 Not used Ust 5 Mel use Lire b Mat used Lina T Mat used Ube 8 Hel use Urs 3 Ha used Click Accept Function Ung 15 Hot used TESTGabt AccepitFunction Hain S consen 10 The Auto Zero feature is enabled LFXG H Technical Reference Manual 155 Appendix Il Special applications Vapor pressure compensation A nuclear level gauge works on the principle that the product shields the detector from the radiation beam allowing more or less radiation to strike the detector as the product level falls and rises For an accurate level indication the variation in the detector output should depend only on the product level However vapor pressure variations in the headspace of the vessel can cause erroneous product level indications This is because the vapor also blocks some of the radiation When the pressure is higher more radiation is blocked when the vapor pressure is lower less is blocked Therefore
76. eement State or other appropriate nuclear regulatory body may remove the source holder lock Note Users outside the U S must comply with the appropriate nuclear regulatory body regulations in matters pertaining to licensing and handling the equipment Can you remove the source holder lock If you are in doubt whether you have permission to remove the source holder lock Do not The license sets limits on what the user can do with the gauge Licenses fall into two categories 1 General 2 Specific LFXG H Technical Reference Manual 21 Installation It is up to the user to review the license to determine if they have the appropriate permission to perform any of the following e Disassemble e nstall e Relocate e Repair e Test e Unlock Note Low activity source holders have different requirements from a typical source holder Contact VEGA Americas Inc for information regarding low activity source holders 28 LFXG H Technical Reference Manual Installation You can remove the source lock if installation of the gauge is in the U S and you have the specific license to remove the source holder lock Confirm that your license specifically states that you have the permission to perform this operation and then contact VEGA Field Service Radiation Safety for the combination Do not remove the lock if the gauge has a general license tag installation is in the U S and you do not have the specific license tha
77. efault value 1 Dither level Dither level is the magnitude in mA above and below the average output of the current loop dithering Default value 1mA Cycle period Cycle period is the repetition rate for presenting the current loop dither in x ray interference output mode Default value 1s 116 LFXG H Technical Reference Manual Appendix I Initial factory setup Dither time Dither time is the percentage of the cycle period to output the dither Default value 1 Table 22 X ray alarm conditions Threshold Dither level Dither time Cycle period oetting up the x ray alarm parameters Procedure 46 Setting up the x ray alarm parameters 1 From the Main menu select Initial setup 2 From the Initial setup menu select Alarms 3 From the Alarms menu select Mode configuration 4 From the Mode configuration menu select Xray alarm 5 Edit the following values as necessary e Threshold e Dither level e Cycle period e Dither time 6 If using a hand held Communicator press F2 to send the changes to the transmitter LFXG H Technical Reference Manual 117 Appendix Initial factory setup Setting the relay as an x ray alarm Procedure 47 Setting the relay as an x ray alarm 1 From the Main menu select Initial setup 2 From the Initial setup menu select Alarms 3 From the Alarms menu choose Set relay function 4 From the Set relay function menu select X ray o Press F4 to enter 6 If using a hand held HART Com
78. eference Manual Introduction Using Ohmview 2000 Software on a PC When you use an IBM compatible personal computer with windows and a Pentium processor to communicate with the DSGH or other VEGA HART transmitter field devices you must have a HART modem and Ohmview 2000 software The Ohmview 2000 software kit part number 243008 includes the following e Modem e Cables e Software Ohmview 2000 RS 485 Network Ohmview 2000 Logger and Ohmview 2000 Configurator software is a window s program that emulates the HART Communicator Model 275 In addition Ohmview 2000 enables the following e Charts the 4 20mA current output graphically e Stores and retrieves configuration data to disk e Off line editing of configurations Ohmyiew 2000 Y ersion 1 0 1 0 File Communication Utilities Monitor Help Firmware Version 1 00 Tag DEMO Type Density na m Communication Statistics 100 Select Tabs Filtering Source Functions System Info Aux Input Process Info Gauge Setup Cal Parameters PV Units Spans Setup Gauge Type Calibration C Level Gauge Info e Desi Diagnostics Transmitter Location Alarms amp Local Linearizer Type ibd Equation S Linearizer Type Status Linearizer Type Equation C Table Non linear C Table Linear Figure 9 Ohmview 2000 software Note There are some minor differences in operation of the Ohmview 2000 software and t
79. ence Manual Appendix lll Retrofitting HART electronics Table 27 Linearizer record Linearize r table Smart Pro HART Linearizer HART Linearizer table points Screen item Smart Pro Value table point 7espan Smart Pro Value 100 0 528 0 0 0 1 528 1 2 5 2 528 2 5 0 3 528 3 7 5 4 528 4 10 0 5 528 5 12 5 6 528 6 15 0 7 528 7 17 5 8 528 8 20 0 9 528 9 22 5 10 528 10 25 0 11 528 11 27 5 12 528 12 30 0 13 528 13 32 5 14 528 14 35 0 15 528 15 37 5 16 528 16 40 0 17 528 17 42 5 18 528 18 45 0 19 528 19 47 5 20 528 20 50 0 21 528 21 52 5 22 528 22 55 0 23 528 23 57 5 24 528 24 60 0 25 528 25 62 5 26 528 26 65 0 27 528 27 67 5 28 528 28 70 0 29 528 29 72 5 LFXG H Technical Reference Manual 165 Appendix lll Retrofitting HART electronics Linearize r table points 30 31 32 33 34 35 36 37 38 39 40 166 Smart Pro Screen item Smart Pro Value 528 30 528 31 528 32 528 33 528 34 528 35 528 36 528 37 528 38 528 39 528 40 Table 33 Linearizer record continued HART Linearizer HART Linearizer table table point span Smart Pro Value 100 75 0 77 5 80 0 82 5 85 0 87 5 90 0 92 5 95 0 97 5 100 0 LFXG H Technical Reference Manual Appendix IV HARI menus and screens The following charts illustrate the HART hand held communicator menus and screens See the VEGA View User Manual for illustrations of the VEGA View HART menus and screens LFXG H Technical Reference Manual 16
80. ence Manual 31 Calibration Current loop analog output calibration Calibrating the current loop adjusts the 4 20 mA output to a reference either the PLC DCS or a certified ammeter It forces the 4 and 20 mA outputs to the external reference The VEGA factory pre adjusts the current loop with a certified ammeter so it is very close to the outputs required To correlate the 4 20 mA to the process value set the span of the current loop output in the Loop Span screen from the Initial setup Process parameters Spans Current Loops Span menu See the Appendix l Initial Factory Setup section for details Note The current loop and process spans are independent and set separately The current loop span sets the level indications for the 4 and the 20 mA outputs The process span sets the endpoints of the calibration curve The current loop span and process span are set in the Initial setup screen from the Main menu A quick way to check the span settings is to use the View settings menu from the Initial setup menu A direct measurement of the current is preferable Take this measurement by hooking the meter up in series with the instrument and the DCS However if you know the resistance of the DCS use a voltage measurement to calculate the current DCS DCS RE B Current m
81. enu select Initial setup 2 From the Initial setup menu select System parameters 9 From the System parameters menu select Source function 4 From the Source function menu select Next wipe shut due 5 From the Next wipe shut due menu select Next wipe due to view the due date 6 From the Next wipe shut due menu select Next shut chk due to view the due date T Press F4 to exit Spare parts Contact VEGA Field Service at 1 513 272 0131 for parts service and repairs Outside the U S contact your local VEGA representative for parts service and repairs 90 LFXG H Technical Reference Manual Diagnostics and repair Field repair procedures Very few parts are field repairable but you can replace entire assemblies or boards The following parts are replaceable e CPU circuit board e Power supply circuit board Use great care to prevent damage to the electrical components of the gauge VEGA recommends appropriate electrostatic discharge procedures LFXG H Technical Reference Manual 91 Diagnostics and repair Replacing the CPU or Power supply board You may have to replace a circuit board if there is damage to one of its components Before replacing a circuit board check the troubleshooting flowcharts or call VEGA Field Service to be sure a replacement is necessary The sensor EEPROM contains a backup of the CPU board EEPROM After physically replacing the CPU board you must perform a memory backup to update the CPU bo
82. er cable can be part of a single cable 4 wire hookup or can be separate from output signal cable See Output current loop section Use wire between 1 63 to 0 643mm 14 22AWG for power wiring Switch for CE compliance For CE compliance install a power line switch no more than one meter from the operator control station Output current loop Output signal is 4 20 mA into 250 800ohms Q HART communication protocol BEL202 FSK standard is available on these connections The output is isolated to standard ISA 50 1 Type 4 Class U When using signal current loop or 4 20 mA output cables that VEGA did not supply the cables should meet the following specifications e Maximum cable length is 1 000m 3 280ft e All wires should be 1 02 0 643mm 18 or 22AWG If using DC power signal and power can run on a single cable 4 wire hookup two wires for power two for 4 20 mA LFXG H Technical Reference Manual 25 Installation Communication The HART hand held terminal can connect anywhere across the 4 20 mA wires to communicate with the level transmitter A minimum requirement is a 250 load resistance on the current loop The hand held terminal is Rosemount model 275 or equivalent VEGA number 236907 A HART modem may also connect across the 4 20 mA wires to enable communication between the level transmitter and an IBM compatible PC Process alarm override switch If the output relay is set as
83. es if you are ready with the standardization material in the process vessel to continue the standardization procedure The timer counts down while it is collecting data 4 Depending on how the system is set up it displays one of the following e The message Gage Set up to Use Default Value indicates the system is using the default value as the actual value of the standardization material e A screen that displays the detector counts the calculated process value and a field for the user to input the actual value of the level The prompt asks Edit Counts Select No to continue or Yes to input the average counts 5 Press F2 to send 52 LFXG H Technical Reference Manual Chapter 4 Advanced functions Functions not required for normal operation of the transmitter are found in the software menu structure under the heading Advanced Fxns These functions are primarily for use by VEGA personnel for advanced troubleshooting and repair This chapter gives a basic explanation of these functions Note VEGA strongly recommends that you ask our advice before using any of these advanced functions Process chain The process chain is a description of the transmitter software s calculation of a level measurement from a radiation reading In the Process chain screen you can view intermediate values of the calculation to verify proper functionality of the software Primary channel Press the hot spot key on the hand held communicato
84. eshooting The test modes enable independently However you can use them in combination to test multiple variable effects All of the test modes time out automatically after one hour if you do not manually exit CAUTION While in a test mode the transmitter is not measuring process and so its current output does not reflect the process value If your DCS is controlling from the transmitter s current output be sure to remove the system from automatic control before entering a test mode The software screens prompt you to do so before entering test mode Milliamp output test mode Use the milliamp output test mode to manually force the current output to a specified value This is useful for verifying the current loop calibration Instructions to calibrate the current loop are available in the Calibration chapter of this manual Note While in milliamp test mode the HART communication may post a Status error This is expected and not an indication of a failure If the message Status Error Ignore Next xx Occurrences displays select Yes to ignore the Status Error LFXG H Technical Reference Manual 61 Advanced functions Start milliamp output test mode Procedure 13 Start mA output test mode 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select Test mode 3 From the Test mode menu select mA Out test mode 4 From the mA Out test mode menu select Enter mA test mode 5 At the prompt en
85. eter Volt meter Detector housing Terminal block Detector housing Terminal block pins 13 amp 14 pins 13 amp 14 Figure 16 Measuring the current loop output 32 LFXG H Technical Reference Manual Calibration Before a current loop calibration H Connect an ammeter or the DCS to terminal connections 13 mA and 14 mA or the test points H1 and H2 or anywhere along the current loop H Make sure there is a 250 800Q load on the current loop If no load or an insufficient load exists on the loop it may require temporary placement of a resistor across terminals 13 and 14 Hook the meter or DCS in series with the load resistor 6 Calibrating the current loop Procedure 1 Calibrating the current loop From Calibrations menu select Current loop cal The Current loop cal screen prompts you to connect the reference meter Press F4 when the ammeter connects The screen displays Setting Field Device Output To 4 mA The analog output circuit on the transmitter sets the current to approximately 4 mA Read the ammeter and enter the actual milliamp reading Note If using a voltmeter calculate the current value The next screen prompts Field Device Output 4 00 mA Equal to Reference Meter e Choose Yes if the ammeter reads 4 00 mA e Choose No if the ammeter reads anything but 4 00 mA Repeat until the meter reads 4 00 mA The meter approaches the 4 00 mA successively Repeat procedure for 20mA setting You can check the curren
86. even at the same product level the detector can receive varying amounts of radiation depending on the head vapor pressure You can compensate for this by using a point detector model DSGH to separately measure the radiation passing through the vapor space This detector signal and the signal from the continuous level detector combine to eliminate the effect of the vapor pressure on the level indication Source holder frequency FiberFlex LFXG F aa at with S85 option 4 to 20mA Figure 53 Vapor compensation system 156 LFXG H Technical Reference Manual Installation requirements Appendix ll Special applications A vapor compensation system requires two detectors the point detector model DSGH to measure the vapor space and the continuous level detector to measure the product level Both must be in the radiation beam from the source holder Mount the DSGH so that it is above the highest expected product level Detector wiring The level detector provides a frequency signal to the DSGH The output of the DSGH is the calibrated vapor compensated 4 20 mA signal for control and HART communication Figure 54 illustrates the interconnection between the density gauge and the level gauges Sensor Location Power cable per local codes NN Power 1 Earth ground gee y ZA SE 2LZ Housing ground Cenelec Ground e Q d Q G 0 U A Output signal cable Power cable
87. g of the counts from multiple detectors is invisible to the user When setting the span set it for the length that is the total of all the detectors Note In many cases you cannot fill or empty the process vessel for calibration Use the following hints in these situations With the vessel empty open the source holder shutter to simulate low level set low level in software Close the source holder shutter to simulate high level set high level in software LFXG H Technical Reference Manual 129 Appendix Il Special applications NORM naturally occurring radioactive material compensation Products that contain natural radioactive materials for example radon may require special compensation of the level measurement The radiation emitted by the product material can interfere with the measurement since the detector cannot differentiate between the radiation from the source and the radiation from the product Achieve compensation of the measurement by using a second detector that measures only the radiation emitted by the product material A primary detector measures the process level measurement The signal from the secondary detector is input to the primary detector The primary detector runs an algorithm to subtract the effect of the material s radiation from the source holder s radiation source frequency holder 4 to 20mA Frequency output FiberFlex LFXG F HART FiberFlex LFXG H wit
88. ge 3 Verify that the master gauges has no jumpers made address F 4 Power up the master gauge 5 Use the RS 485 confiauration nroaram to disable the RS 485 local network JP Hain Be rrem Connected to Main Screen From Tag Number Address DN H3 485 Port Selection 6 Re connect the RS 485 wiring on the master gauge Note Wire the Master gauge relay as the RS 485 Network Fault relay Failure to use this relay can result in significant measurement error from incorrect compensation or no compensation 7 Confirm that all of the ga onfiguration When directly connected to a responder gauge the jumper Main Screen Connected to Tag Number ADD TQ Address 7 RS 485 Responder 8 Power up all network gauges 9 Confirm all hardware is functioning properly 150 LFXG H Technical Reference Manual Appendix ll Special applications Procedure 54 Setting up GEN2000 RS 485 local network continued 10 Run the RS 485 configuration program and configure the master gauge to poll all of the gauges on the network Master Poll Configuration BE Connected to Tag Number ADD 15 Master Poll Configuration Address 15 Re RS 485 Master To Change data 1 Click On any Poll cell 2 Press Change Setting Tag ld Unit 6 Double click on Unit 7 On ADD7_TOP Unit 8 Off the Poll cell to Unit 9 Off TET ot toggle On Unit 11 n ADD 11 Unit 12 Off Unit
89. gth Offset the detectors vertically so that the end of the top detector s active length corresponds to the beginning of the bottom detector s active length e Place all detectors in the radiation beam 124 LFXG H Technical Reference Manual Appendix ll Special applications HART detector active length Overall active length Frequency out detector active length Figure 35 Placement of multiple detectors LFXG H Technical Reference Manual 125 Appendix Il Special applications Detector wiring Multiple detectors application require at least one frequency output detector and only one HART output detector SENSOR LOCATION CDNIRDL ROOM S g K gt LC aen Dao OR Qog ei WE SYSTEM ARCI IEG LU a S Ge 4 ry PL ATION AL Se MDE mA INPUT SAUTPU T1 SIGNAL N A DCS B Li Ga d HANL IC HE LI POWER DAELE FER LOCAL CUDES di NX p B DSF OR TERMINAL T BRTIDNAL HANB HELD TERMINA lt LSGF OETECLTOR E H PONER N Ke gona N F V b OUTPUT SIBNAL CABLE RO H A Y ma y LG m NIX cc NX Gg run
90. h 19 Figure 12 Bench test setup 19 Location considerations 20 Stable temperature 20 Protect insulation 20 Avoid internal obstructions 20 LFXG H Technical Reference Manual iil Preface Avoid external obstructions 21 Avoid source cross talk 21 Mounting the measuring assembly 22 Figure 13 Conduit and bracket mounting 22 Wiring the equipment 23 Figure 14 LFXG H internal and external ground screw 23 Figure 15 Interconnect 24 Table 5 Terminal names and descriptions 24 Power 25 Switch for CE compliance 25 Output current loop 25 Communication 26 Process alarm override switch 26 Conduit 26 Commissioning the gauge 27 Can you remove the source holder lock 27 Field service commissioning call checklist 30 Chapter 3 Calibration 31 Current loop analog output calibration 32 Figure 16 Measuring the current loop output 32 Calibrating the current loop 33 Procedure 1 Calibrating the current loop 33 Choosing the calibration method 34 Table 6 Calibration methods 34 Standard method of calibration 35 Figure 17 Standard method calibration flow chart 35 Table 7 Standard method calibration 36 Simple method of calibration 37 Figure 18 Simple method calibration flow chart 37 Table 8 Simple method calibration 38 Theory of calibration 39 Both calibration methods 39 Both calibration methods 39 Standard calibration method 39 Figure 19 Linearizer data collected at various process levels 39 Simple calibration method 40 Standard calibration
91. h S86 option Figure 38 NORM compensation system 130 LFXG H Technical Reference Manual Appendix ll Special applications Special drawings for NORM Compensation Ideally identification of applications requiring NORM compensation occurs at the time of order The end user engineering contractor or both may have received certified drawings for the exact equipment ordered Refer to the drawings along with this section of the manual LFXG H Technical Reference Manual 131 Appendix Il Special applications Installation requirements You must install the detectors correctly for NORM compensation to work Mount the primary detector so it is in the source holder radiation beam Mount the secondary detector so that it is NOT in the source holder radiation beam vessel top view source holder c primary detector O secondary detector Figure 39 Placement of detectors for NORM compensation Detector wiring Wire the secondary detector into the primary detector as shown in Figure 40 132 LFXG H Technical Reference Manual Appendix ll Special applications Sensor location Control room LFXG H DSG H or LSG H I System architecture Output signal Power cable per local code Power Earth ground SEET E ZZZZANLZZL LLL RL LL LLL A 222 H d Hand held terminal Housing ground CENELEC ground optional LFXG F DSG E E or
92. he hand held communicator Most significantly Ohmview 2000 software writes entries immediately to the transmitter but a communicator only sends changes after pressing F2 to send This manual s instructions are for the hand held communicator but most procedures use exactly the same steps LFXG H Technical Reference Manual 15 Introduction Refer to the Ohmview 2000 Electronic User Manual that accompanies the software diskette for complete instructions for using Ohmview 2000 software The Ohmview 2000 software includes the main Ohmview 2000 software HART Communication Server Launcher program Ohmview 2000 Logger Ohmview 2000 File Configurator and the Ohmview 2000 Electronic User Manual When you insert the disk into your CD drive the program automatically starts installing these programs onto your hard drive The HART Communication Server must always be on when using Ohmview 2000 s main program and Ohmview 2000 Logger Ohmview 2000 version 1 0 2 Compatible with Windows 95 98 2000 NT and XP Software for Ohmart level and density gauges Part 243008 Figure 10 Example of an Ohmview 2000 CD label 16 LFXG H Technical Reference Manual Introduction The HART screens menu structure In both the hand held HART Communicator and the VEGA View or Ohmview 2000 software the user interface for HART functions is in a menu structure When the HART Communicator or VEGA View Ohmview 2000 starts up the Online menu dis
93. he actual process level you must use the standard method of calibration 34 LFXG H Technical Reference Manual Calibration Standard method of calibration Figure 17 illustrates the steps to prepare for and perform a standard method calibration correctly Are process units set No Change units in Initial setup screens Islinearizer set to Table non linear Change linearizer to Table non linear in Calibrations Linearizer screen Is process span set correctly No Change measurement span in Initial setup screens Collect linearizer data on known samples using the function Collect data point in the Linearizer screens CES Perform these data collection steps in any sequence Perform Set Cal low level and Set Cal high level steps in any a gt sequence in Initial cal screens re e e ee ee ee Perform Calc linearity function in the Linearizer screens Perform Cal result function in Initial cal screens Figure 17 Standard method calibration flow chart LFXG H Technical Reference Manual 35 Calibration Table 7 Standard method calibration Standard method calibration Step in flow chart Manual heading Page Check process engineering units Units 98 Check process span Span settings process span 103 Check linearizer type set to table non linear Choosing the linearizer type
94. he gauge 52 Chapter 4 Advanced functions 53 Process chain 53 Primary channel 53 Temp 53 Sensor cnts 53 TC counts 53 Raw counts 53 Adj counts 54 SD counts 54 Stdz counts 54 Cnt range 54 of span 54 Figure 23 counts range vs process span 54 Raw level 55 Uncomp Lvl 55 Level 55 Process variables 55 Counts low 55 Counts high 55 Max level 55 Min level 55 Temp comp gain 55 Uniformity gain 55 Source decay gain 55 Stdz gain 55 HV setting 56 Aux channel chain 56 Aux raw counts 56 Filt counts 56 Min Max history 56 Temp min max 56 Sensor min max 56 Aux in min max 56 LFXG H Technical Reference Manual V Preface Last reset 56 Resetting the minimum and maximum history 57 To reset the minimum and maximum history 57 Procedure 10 Resetting the minimum and maximum history 57 New hardware or EEPROM corrupt 58 Proper response to New hardware found message if new hardware has been installed 59 If a new CPU board has been installed 59 Procedure 11 New Hardware Found message with new CPU board 59 Proper response to New hardware found message if new hardware has not been installed 59 CPU EEPROM Corrupt message or Sensor EEPROM Corrupt message 59 To repair the corruption from the EEPROM backup 60 Procedure 12 Repairing corrupted EEPROM 60 Test modes 61 Milliamp output test mode 61 Start milliamp output test mode 62 Procedure 13 Start mA output test mode 62 Exit milliamp output test mode 62 Procedure 14 Exit mA output
95. he unit is not CE compliant and may be damaged or Cause personal injury Preface NOTES li LFXG H Technical Reference Manual Preface Contents Table 1 Revision history i Contents iii Explanation of symbols xii Table 2 Explanation of symbols xii HART software screens xiv Figure 1 HART screen gauge not connected xiv Figure 2 HART screen gauge connected xv Your comments xvi Chapter 1 Introduction 1 Nuclear materials notice 1 Unpacking the equipment 2 Storing the equipment 3 Storing the source holder 3 Storing the detector 3 Certifications 3 Safety Information for EX Areas 4 Figure 3 IECex Label 4 LFXG H specifications 5 Table 3 LFXG H specifications 5 Typical applications 6 Pulp and Paper 6 Chemical 6 Food and beverage 6 Water and wastewater 6 Where to find help 7 VEGA Customer Service 7 Table 4 Contact information 7 Principle of operation 8 System overview 8 Figure 4 System overview 8 Figure 5 Typical source holder 9 Scintillator model LFXG H 10 Figure 6 LFXG H exploded view 10 Communicating with the gauge 11 Using a universal hand held terminal 11 Figure 7 HART hand held communicator 12 Using VEGA View software on a PC 13 Figure 8 VEGA View software 13 Using Ohmview 2000 Software on a PC 15 Figure 9 Ohmview 2000 software 15 Figure 10 Example of an Ohmview 2000 CD label 16 The HART screens menu structure 17 Figure 11 Online menu 17 Chapter 2 Installation 19 Testing on the benc
96. higher when you use the hand held HART communicator to make NORM or vapor compensation See Appendix Il Special Applications for further information concerning NORM and vapor compensation 12 LFXG H Technical Reference Manual Introduction Using VEGA View software on a PC When you use an IBM compatible personal computer to communicate with the LFXG H or other VEGA HART transmitter field device you must have a HART modem and VEGA View software The VEGA View software kit part number 237857 includes the following e Modem e Cables e Software e Manual VEGA View software is a DOS program that emulates the HART Communicator Model 275 In addition VEGA View enables the following e Charts the 4 20mA current output graphically e Stores and retrieves configuration data to disk e Off line editing of configurations Figure 8 VEGA View software LFXG H Technical Reference Manual 13 Introduction Note There are some minor differences in operation of the VEGA View software and the hand held communicator Most significantly VEGA View software writes entries immediately to the level transmitter but a communicator only sends changes after pressing F2 to send This manual s instructions are for the hand held communicator but most procedures use exactly the same steps Refer to the VEGA View User Manual that accompanies the software diskette for complete instructions for using VEGA View software 14 LFXG H Technical R
97. ing only the change in the process variable in the signal RC exponential RC exponential filtering simulates the traditional Resistance Capacitance filtering It provides an infinite impulse in which all of the previous samples contribute less and less to the average but all contribute somewhat The most recent samples are weighted most heavily in computing the average Compared to rectangular window filtering RC exponential filtering provides a quicker response to step changes in the process but has a larger noise band S Damping e ON eme RENE 63 76 Q N t 1 Time Constant Figure 31 RC exponential filtering LFXG H Technical Reference Manual 101 Appendix Initial factory setup Rectangular window filtering Rectangular window filtering computes an average based only on a specified finite number of samples All samples are weighted equally in the average Although it provides a slower step response since the most recent measurements are weighted the same as those further back in time it produces a less noisy signal Generally rectangular window linear averaging by itself produces results similar to combining RC exponential filtering with the fast cutoff feature Sample Weighting Sample Current Sample Figure 32 Rectangular window filtering Damping The type of filter you choose determines the damping function With the RC exponential method the damping entry is equivalent to a time
98. ipe A source wipe is due Alarm acknowledges when you log a source due Yes due wipe Refer to page 89 for more information CPU Pass CPU There has been a corruption To check if the problem is recurring EEPROM Fail EEPROM of the non critical memory on acknowledge the alarm and then cycle power status corrupt the CPU board EEPROM and to the unit it may not have been If the alarm occurs again it indicates a resolved internally hardware problem See page 93 Alarm Not used Not used in standard Consult VEGA for special software type 1 software 19 Diagnostics and repair Alarm Not used Same as above Same as above type 2 Shutter No Shutter check A source holder shutter Alarm acknowledges when you log a shutter check due Yes due check is due check See page 89 New No New hardware The CPU board detects a The CPU board or sensor assembly may have hardware Yes found configuration mismatch been replaced or one of the EEPROM found configurations is erroneous Refer to page 92 for more information Sensor Pass Sensor fail Less than 1 count seen in Indicates the sensor is malfunctioning status Fail the last 10 seconds as configured by Field Service Process out Nol Process out of Current process value is s of range Yes measurement outside of the minimum or range maximum level span setting Sensor Pass Sensor high The high voltage on the Check wiring on CN2 voltage Fail voltage fail PMT is outside the usable status range
99. it number 2 From the pull down menu select the proper function type 3 Click Accept Function 146 LFXG H Technical Reference Manual Appendix ll Special applications Communication Statistics Use this screen to view the number of times the Master unit has sent messages to the Responder units and the number of times the responder units have replied Communication Statistics Connected to Communication Tag Number ADD 15 Statistics d pouce lal x RS 485 Master Un eg Receive Tactd UWT nan 0 0 Unit 2 D D Unit 3 83333 0 Unit 4 D D Unit 5 D 0 Unit 6 D 0 Unit 7 83341 79483 ADD TOP Unit 8 D n Unit 8 D n Unit 10 D n Unit 11 83345 43174 ADD 11 Unit 12 D 0 Unit 14 D D Unit 15 D D ADD 15 MainScreen Figure 50 RS 485 Communication Statistics screen LFXG H Technical Reference Manual 147 Appendix Il Special applications Master Configuration Use this screen to setup the Polling requirements for each unit Polling activates the function for the unit To turn the polling On or Off double click on the Poll cell next to the unit number Master Poll Configuration g E ial xl Connected to Master Tag Number ADD 15 Poll Configuration Address 15 D RS 485 Master To Change data 1 Click On any Poll cell 2 Press Change Setting Unt Pol Tag Unt T nnana Unit 2 Off RD Unit 3 On Unit 4 ort Unit 5 Off Unit 6 Off Unit 7 n ADD7 TO
100. itter especially if ordered as part of a complete system that included a HART level transmitter The certified drawings and this manual section have sufficient information in most cases Some special notes about the frequency output detector are below e Model LFXG F uses much of the same hardware as the model LFXG H the HART level transmitter model They look similar so verify that you are installing the correct detector as the frequency output slave detector e Model LFXG F uses a different version of firmware than LFXG H This firmware enables a frequency output instead of the HART output e Some spare parts are unique to the frequency output models See the following tables for the spare part descriptions and part numbers LFXG H Technical Reference Manual 123 Appendix Il Special applications LFXG F spare parts Table 23 LEXG F spare parts Description VEGA part number Power supply board 239747 LFXG F CPU board 241110 125 mA fuse on power supply board 238661 2 0A fuse on power supply board 240539 Installation requirements A multiple detector application consists of one HART level transmitter and one or more level gauges that output a frequency to the HART transmitter Follow these installation guidelines e Install the detector with the HART output model LFXG H at the top of the vessel Install the other detector s beneath the HART detector e The mounting tabs of the detectors define the active or sensing len
101. izer data collected at various process levels LFXG H Technical Reference Manual 39 Calibration oimple calibration method The simple method of calibration does not require collection of intermediate data points Standard calibration method Internal software calculates a linearizer curve based on data points The curve is the most accurate between the Cal Low Level and Cal High Level as shown in Figure 20 For this reason it is best to take the Cal Low and Cal High samples as close as possible to the Min Level and Max Level to maximize the accuracy within the span oimple calibration method Based on the Cal Low Level and Cal High Level the internal software calculates a straight line between the Min Level and Max Level Cal Low Counts Standard Raw Sensor Counts Cal High Counts Max Level Level Cal Cal Low High Level Level Actual Level eng units Figure 20 Raw counts vs actual level with linearizers Standard calibration method The linearizer curve maps on two axes so that it indicates Count Range vs Span as shown in Figure 21 To construct the linearizer table a data point calculates for every 2 5 of the span View or edit these points in the Linearizer table screen Simple calibration method The internal software calculates a straight line between the Min Level and Max Level based on the Cal Low Level and Cal High Level 40 LFXG H Technical Reference Manual Calibration Standard A
102. k due 108 No device found message 83 non linear table 42 NORM drawings 131 NORM comp setting up 135 differences with communicator 14 15 Ohmview 2000 11 Output current 25 190 percent count range 54 percent process span 54 poll address 68 Poll address 68 Power AC 25 DC 25 Primary channel 53 process alarm setting relay as 115 Process alarm 78 Process alarm override switch 26 Process application new 51 Process chain 53 Process out of measurement range alarm setup 111 Process out of range alarm acknowledge 76 diagnostics check 76 in diagnostic history 74 Process standardize type 100 Process variables 55 Process vessel build up or erosion 51 Process vessel changes 51 PV process value 55 RAM corrupt alarm acknowledge 75 alarm setup 111 in diagnostic history 74 RAM status diagnostics check 75 Raw counts 53 Raw level 55 Real time clock fail alarm acknowledge 75 alarm setup 111 in diagnostic history 74 Real time clock test diagnostics check 75 Record shutter check 108 Record wipe 107 Relay 114 Relay action limit High limit alarm setup 114 Relay action limit Low limit alarm setup 114 relay settings diagnostic alarm 112 process alarm 115 x ray alarm 118 Relay test 61 Relay test mode 66 repairs material return authorization MRA number 95 returning equipment to Ohmart 94 Reset last date 56 Results calibration 50 RS 485 Communication Statistics 147 Mas
103. l and Cal high level C Cp counts range Of span The percent process span indicates the measurement value as a percent of the measurement span The maximum and minimum level values are input in the Initial setup screens A graph of percent count range vs percent process span indicates the non linearity of the radiation transmission measurement If using a table linearizer the values in the table are percent count range and percent process span Figure 23 counts range vs process span counts range 50 F l l l 30 process span 54 LFXG H Technical Reference Manual Advanced functions Raw level Raw level displays the level in inches without the time constant or rectangular window filter Uncomp Lvl Uncompensated level displays the level in inches without the time constant or rectangular window filter Level Level displays the process value that is the level or other indication in engineering units after applying the filter This value relates to the current loop output Process variables The display values for the Process variables screen are Counts low Displays the counts low that is the temperature and sensor uniformity gain compensated counts from the sensor at the Cal low level Determination of the Cal low level occurs during the initial calibration procedure Counts high Displays the counts high that is the temperature and sensor uniformity gain compensated counts from the sensor at
104. larm Type 2 Real time clock Sensor fail Shutter check due Sensor temp Sensor high voltage fail Process out of measurement range LFXG H Technical Reference Manual 111 Appendix Initial factory setup oetting the diagnostic alarm conditions Procedure 42 Setting the relay as a diagnostic alarm 1 From the Main menu select Initial setup 2 From the Initial setup menu select Alarms 3 From the Alarms menu select Mode configuration 4 From the Mode configuration menu select Diagnstic alarm 5 If using a hand held HART communicator from the Diagnstic alarm menu select Diagnstic Gp1 Diagnostic Group 1 If using VEGA View proceed to the next step 6 From the Diagnstic Gp1 screen scroll through the list of diagnostic conditions that can be used to activate the relay e Toggle the conditions On or Off with the F2 key e Press F4 to enter e Press the LEFT ARROW key to return to the Diagnstic alarm screen T If using a hand held HART Communicator from the Diagnstic alarm menu select Diagnstic Gp2 Diagnostic Group 2 8 From the select Diagnstic Gp2 screen scroll through the list of diagnostic conditions and toggle the conditions On or Off 9 If using a hand held HART communicator press F2 to send the setting to the transmitter oetting the relay as a diagnostic alarm Procedure 43 Setting the diagnostic alarm conditions 1 From the Main menu select Initial setup 2 From the Initial setup menu select Alarms 3
105. lter Press F4 to enter 6 From the Filtering menu select Damping T From the Damping screen enter the damping desired and F4 to enter Refer to the help screens F1 or page 101 in this manual for details 8 From the Filtering menu select Fast cutoff 9 From the Fast cutoff screen enter the cutoff value desired and press F4 to enter Refer to the help screens F1 or page 101 in this manual for details Note To turn off Fast cutoff enter O as the value 10 If using a hand held HART Communicator press F2 to send the updated filtering parameters to the transmitter LFXG H Technical Reference Manual 103 Appendix Initial factory setup Span settings The spans for the process current loop and any optional auxiliary input are set in the Spans screen from the Initial setup Process parameters menus Process span Process span is the anticipated lowest and highest level Min and Max level measurement with the gauge The level transmitter calibrates within these settings These define the endpoints for the calibration and linearizer curve This does not define the span for the output current loop Refer to the Current Loop Span procedure in this section Note The Min and Max Level values for the process span are essential to proper calibration of the system You must enter the Min and Max level for process span before you perform an initial calibration You must perform a new initial calibration procedure if the values f
106. ly board 92 Replace the CPU or Power supply board 93 Procedure 29 Replacing the CPU or power supply board 93 Requesting field service 94 Returning equipment for repair to VEGA 94 Returning equipment for repair 95 Procedure 30 Returning equipment for repair 95 Appendix I Initial factory setup 97 LFXG H Technical Reference Manual vii Preface Process parameters 98 Units 98 Level units 98 Custom units 98 Setting the process units 98 Procedure 31 Setting the process units 98 Setting custom units 99 Procedure 32 Setting custom units 99 Calibration parameters 99 Data coll interval 99 Warn span cal 99 Process stdz type 100 Default std 100 Stdz interval 100 Setting the calibration parameters 100 Procedure 33 Setting the calibration parameters 100 Filtering 101 Type RC exponential or rectangular window 101 RC exponential 101 Figure 31 RC exponential filtering 101 Rectangular window filtering 102 Figure 32 Rectangular window filtering 102 Damping 102 Fast response cutoff 102 Selecting a filter type damping and fast cutoff 103 Procedure 34 Selecting a filter type damping and fast cutoff 103 Span settings 104 Process span 104 Setting process span 104 Procedure 35 Setting the process span 104 Current loop span 105 Table 18 Setting process values of 0 and 100 105 Procedure 36 Setting the current loop span 105 System parameters 106 Time 106 Date 106 Setting the time and date 106 Pr
107. method 40 Simple calibration method 40 Figure 20 Raw counts vs actual level with linearizers 40 Standard calibration method 40 Simple calibration method 40 Figure 21 Count range vs span shown in linearizer table 41 Both calibration methods 41 Figure 22 Indicated level vs actual level 41 Choosing the linearizer type 42 Non linear table 42 Table linear 42 Choosing a linearizer method 43 Procedure 2 Choosing a linearizer method 43 Checking the gauge repeatability 43 Performing a data collect 44 Procedure 3 Performing a data collect 44 Calibrating the gauge 44 Table 9 Standard calibration sensor counts and levels record 45 iV LFXG H Technical Reference Manual Preface Step 1 Set low level 46 Setting the cal low level 46 Procedure 4 Setting the cal low level 46 otep 2 Set high level 47 Setting the cal high level 47 Procedure 5 Setting the cal high level 47 Step 3 Collecting linearizer table data 48 Collecting linearizer table data 48 Procedure 6 Collecting linearizer table data 48 Step 4 Calculating the linearity 49 Calculating a new linearizer table 49 Procedure 7 Calculating the linearizer 49 Step 5 Calculate calibration 50 Calculating the calibration result 50 Procedure 8 Calculating the calibration result 50 When a new calibration may be necessary 51 Periodic process standardization 51 Automatic standardization reminder 51 Performing a standardization 52 Standardizing the gauge 52 Procedure 9 Standardizing t
108. mm 12 276 in 305mm 12 increments 0 66MeV gamma radiation emitter 30 2 year half life 1 2 amp 1 3MeV gamma radiation emitter 5 3 year half life 100 230 10 VAC 90 250VAC at 50 60 Hz at 15VA maximum power consumption 25VA max with heater CE compliance requires 100 230 10 VAC 20 60VDC less than 100mV 1 1 000 Hz ripple at 15VA CE compliance requires 24VDC 10 1 63 0 643mm 14 22AWG 1 000 m 3 280ft 1 02 0 643mm 18 22 AWG two conductor shielded 1 02 0 643mm 18 22 AWG four conductor shielded eDesigned to meet National Electric Code U S amp Canada eClass l Groups A B C amp D Div 1 amp 2 eClass Il Groups E F amp G Div 1 amp 2 EExd IIC T5 pending NEMA 4X IP 66 20 C 60 C 4 F 140 F option for lower temperatures available 0 9596 non condensing Tested to IEC 68 2 6 IEC 68 2 27 and IEC 68 2 36 Cast aluminum ASTM A 357 Polyester Powder Coating 0 0015xLength mm 5 44kg 0 084xLength inches 121lb 4 20 mA isolated into 250 8000 Jumper selectable source active or sink passive mode Diagnostic alarm or process high low alarm function 6A at 240VAC or 6A 24VDC SPDT Form C or 1 4HP at 120VAC BEL202 FSK standard current loop output HART modem and VEGA communications software package HART Communicator model 275 hand held terminal with VEGA device descriptions loaded Frequency input 0 100 kHz Optional NORM or vapor phase com
109. municator press F2 to send the setting to the transmitter 118 LFXG H Technical Reference Manual Appendix I Initial factory setup Auxiliary input settings The auxiliary input is an option for the HART level transmitter to receive a frequency signal With special software the frequency signal incorporates into the final output The software provides special settings for three typical uses of a frequency input e Summation mode e NORM compensation e Vapor pressure compensation Note Refer to Appendix II for complete application information on using the following compensation or application methods Summation NORM Vapor pressure RS 485 Local Network Auto Zero Input filter Input filter is the auxiliary input signal with application of the time constant The filter type RC or rectangular window applied to the auxiliary input is the same as the primary channel LFXG H Technical Reference Manual 119 Appendix Initial factory setup oetting the auxiliary input filter Procedure 48 Setting the input filter 1 From the Main menu select Auxiliary input 2 From the Auxiliary input menu select Filter TC 3 In the Filter TC screen input the value for the filter time constant 4 Press F4 to enter 5 If using a hand held HART Communicator press F2 to send the setting to the transmitter 120 LFXG H Technical Reference Manual Appendix Il Special applications This chapter provides application specific info
110. nearization and calibration with the procedures Calculate linearity and Calculate calibration See pages 49 and 50 11 Set the product to the lowest possible level while at the maximum pressure 160 LFXG H Technical Reference Manual 12 13 14 15 16 17 18 Appendix ll Special applications Procedure 55 Calibrating with vapor compensation continued Set the vapor density to its highest possible value Note the level indication it will likely be upscale From the Initial setup menu select Auxiliary input From the Auxiliary input menu select Vapor From the Vapor menu select Gain Adjust the vapor compensation gain value until the level indication reads the correct minimum level value Press F2 to send to the transmitter LFXG H Technical Reference Manual 161 Appendix Il Special applications Internal heater kit for applications requiring a 50 C rating A heater kit option is available for the LFXG H for applications that require a 50 C 58 F temperature rating With the heater option the internal temperature of the unit rises approximately 30 C 54 F degrees The features of the heater are as follows e The heater kit does not affect the functionality of the LFXG H in any way There is no requirement for special firmware e The factory installs the internal heater kit if you order it with the LFXG H e Retrofits are available for previously installed equipment e Three different
111. nical Reference Manual Appendix ll Special applications Software To setup the RS 485 network you must have firmware version 2000 30 or 2000 30C or higher Ohmview 2000 version 2 0 0 or higher and a HART modem with a connection to a communication port The Ohmview 2000 Launcher program has the RS 485 feature Select this feature to setup the RS 485 network choose compensation types and view information about the gauges Ohmyiew 2000 Launcher Exit Language About ersion 1 0 1 0 10 x DHMART Model DSGH DSTH Click RS 485 Network to start Ohmview 2000 Data Logger Config File Convert Figure 44 Ohmview 2000 Launcher program LFXG H Technical Reference Manual 141 Appendix Il Special applications Note If it does not connect click Disconnect click Exit and entirely close Ohmview 2000 Wait for 30 seconds and open the program again using the Launcher program Select another port After selecting the proper port with the HART modem the program remembers the last port used and selects it again Select the proper Port 1 4 142 Connected to Tag Number Address RS 485 Port Selection Connect Main Screen Figure 45 Ohmview 2000 HS 485 main screen LFXG H Technical Reference Manual Appendix ll Special applications Current errors or alarms Tag number of the Master gauge Main
112. nostic alarms Check with current applicable regulations Record wipe Use the Record wipe feature to record the date and time when you perform a source wipe This resets the diagnostic alarm source wipe due For more information see the Diagnostics and Repair chapter Shut chk Interval Use the Shutter check interval feature to enter the number of days between successive shutter check diagnostic alarms Check with current applicable regulations for recommendations on shutter check intervals LFXG H Technical Reference Manual 107 Appendix Initial factory setup Record shut chk Use the Record shutter check feature to record the date and time when you perform a shutter check This resets the diagnostic alarm shutter check due For more information see the Diagnostics and Repair chapter Next wipe Shut due Use the Next wipe and Shutter check due features to view or enter the due date for the next source wipe and shutter check For more information see the Diagnostics and Repair chapter Tag The tag is a unique eight digit identifier for instrument If provided at the time of your order this parameter is entered at VEGA factory prior to shipment Otherwise you can enter it on this screen oetting the tag identifier Procedure 39 Setting the tag identifier 1 From the Main menu select Initial setup 2 From the Initial setup menu select System parameters 9 From the System parameters menu select Tag
113. nt of the process span apart for the most accurate calibration Increasing the process span usually increases the gauge accuracy Before starting the cal high data collection Fill vessel or pipe with high process or close the source holder shutter to simulate high process m Have actual level ready to enter oetting the cal high level Procedure 5 Setting the cal high level 1 From the Main menu select Calibrations 2 From the Calibrations menu select Initial cal 3 From the Initial cal menu select Two point cal 4 From the Two point cal menu select Set Cal high level 5 The prompt Set Process To High Calibration Point Take Data displays Select Yes to allow the data collection to take place The on screen counter displays the time left If necessary press F3 to discontinue data collection 6 After data collection the screen prompts you to input the actual value in engineering units The prompt Input Actual Value displays Enter the actual level in engineering units T If using a hand held communicator press F2 to send the calibration setting to the level transmitter LFXG H Technical Reference Manual AT Calibration otep 3 Collecting linearizer table data Note The simple method of initial calibration does not use this step This step allows you to collect data points between the high and the low calibration points so that the VEGA level transmitter calculates a response curve based on your data
114. nternal and external ground screw LFXG H Technical Reference Manual 23 Installation LFXG H Termina Name L1 L2 RY NO RYC RY NC Freq Freq 6 COM 10 6 Aux 12 Aux 13 mA 14 mA O ON OT fF Won c o AJ Oo Om P GO M Power in L Power in N Relay NO Relay C Relay NC Freq Freq 6V COM 6V Aux Aux mA mA Relay O O O O O O O O O O O O O O Figure 15 Interconnect Table 5 Terminal names and descriptions Description AC or DC power input AC or DC power input Relay normally open Relay common Relay normally closed Not used in HART applications Not used in HART applications Auxiliary input power Auxiliary input power common Auxiliary input power Auxiliary input frequency signal Auxiliary input frequency signal Positive current loop output Negative current loop output Note The power input terminals are not polarity sensitive 24 LFXG H Technical Reference Manual Installation Power CAUTION DO NOT APPLY POWER until a thorough check of all the wiring is complete The AC power source voltage input is 100 230VAC 10 90 250VAC at 50 60 Hz at 15VA without heater or 25VA with optional heater maximum power consumption AC power must not be shared with transient producing loads The DC power source voltage input is 20 60VDC less than 100mV 1 1 000 Hz ripple at 15VA maximum power consumption DC pow
115. ocedure 37 Setting the time and date 106 Source type 107 Procedure 38 Setting the source type 107 Source function 107 Wipe Interval 107 Record wipe 107 Shut chk Interval 107 Record shut chk 108 Next wipe Shut due 108 Tag 108 Setting the tag identifier 108 Procedure 39 Setting the tag identifier 108 System information 109 Message 109 Procedure 40 Setting the system information message 109 Descriptor 109 Procedure 41 Setting the descriptor 109 Setting up alarms 110 viii LFXG H Technical Reference Manual Preface Diagnostic alarm setup 111 Table 19 Diagnostic alarm conditions 1 11 Setting the diagnostic alarm conditions 112 Procedure 42 Setting the relay as a diagnostic alarm 112 Setting the relay as a diagnostic alarm 112 Procedure 43 Setting the diagnostic alarm conditions 112 Analog alarm setup 113 Table 20 Analog alarm conditions 113 Setting the analog alarm output 113 Procedure 44 Setting the analog alarm output 113 Process alarm setup 114 Table 21 Process relay set alarm conditions 114 Setting up the process alarm 115 Procedure 45 Setting up the process alarm 115 X ray alarm setup 116 Figure 33 X ray interference alarm output 116 Threshold 116 Dither level 116 Cycle period 116 Dither time 117 Table 22 X ray alarm conditions 117 Setting up the x ray alarm parameters 117 Procedure 46 Setting up the x ray alarm parameters 117 Setting the relay as an x ray alarm 118 Procedure 47
116. or the process span Min or Max levels change Modify the span setting if the level transmitter moves from its intended location or is measuring on a different span It is a good practice to verify that the setting is correct before performing an initial calibration oetting process span Procedure 35 Setting the process span T From the Main menu select Initial setup 2 From the Initial setup menu select Process parameters 3 From the Process parameters menu select Spans 4 From the Spans menu select Process span 5 From the Process span screen set both the minimum and maximum values for the measurement span 6 Press F2 to send the setting to the transmitter 104 LFXG H Technical Reference Manual Appendix I Initial factory setup Current loop span The current loop output can be set to be either forward acting or reverse acting by choosing the appropriate values of 4 mA Level and 20 mA Level A forward acting output is proportional to the level and a reverse acting output is inversely proportional to the level See Table 18 for an example of settings for process values of 0 and 100 The current loop span is the lowest and highest level to be indicated by the 4 20 mA current loop analog output These settings do not have to be the same as the process span settings Min level and Max level but must be within the boundaries set for the process span The screens prompt entry of a 4 mA level and a 20 mA level
117. ote On most source holders the handle operates a rotating shutter When installing or removing the assembly from the pipe you must turn the handle to the closed or OFF position and lock the handle with the combination lock that VEGA provides Bracket mounting Conduit mounting Figure 13 Conduit and bracket mounting 22 LFXG H Technical Reference Manual Installation Wiring the equipment Note You may have received an interconnect drawing from VEGA or the engineering contractor If the instructions on the drawing differ from the instructions in this manual use the drawing It may contain special instructions specific to your order Use the drawing notes and the steps that follow to make the input and output connections Make the connections at the removable terminal strips mounted on the CPU board Access the CPU board by removing the explosion proof housing cap VEGA provides an internal and external ground screw for connection of the power Earth ground wire After removing the top cover the location of the internal ground screw is at the front of the housing The location of the external ground screw is next to the conduit entry Power Supply Board Terminal Block Au SAF nnmmmmnrnp if j T j T fil 1 RS 485 Ground if applicable CPU Board nternal Housing Ground Screw el SS af 1 a per el 2 mg d Mounting Bracket En Pam ke lm a Figure 14 LEXG H i
118. pensation multiple gauge linking amp others FLASH and two EEPROMs Maintains time date source decay compensation and is Y2K compatible 6V Memory Corruption HART CPU Active Auxiliary High Voltage Relay amp Field Strength Power specifications change to 115VAC or 230VAC if an internal heater kit is used For more information see page 162 LFXG H Technical Reference Manual 5 Introduction Typical applications VEGA level gauges accurately indicate the level of liquids or bulk materials throughout a range on vessels reactors or tanks In order to achieve a level indication over the desired length it may be necessary to use more than one detector The manner in which these multiple detectors link together depends upon the types of detectors used Specific details on using multiple detectors are available in Appendix II Special Applications The accuracy of quality control systems that use VEGA nuclear level gauges is profitable to a wide range of industry operations A number of applications that use a level gauge are Pulp and Paper e Liquors e Bleach plant chemicals e Coating chemical storage e Lime mud e Wastewater treatment tanks Chemical e Low pressure low vapor chemical storage e Settlers e Surge tanks Food and beverage e Food slurries e Pastes e Syrups e Dough level e Intermediate batch storage Water and wastewater e Settling aeration tanks e Clarifiers e Sludge hol
119. periodic procedures are due The system alerts you by the following means e Appears on the Diagnostics Gauge status screen only indicates the status e HART messages appear when the LFXG H connects to the system if it is set up Note Because some conditions are self repairing for example RAM and EEPROM corruption they appear in the history screens but not in the diagnostic screens Note The following exceptions acknowledge once you have performed the proper procedure e Source wipe due e Shutter check due e Standardize due LFXG H Technical Reference Manual 13 Diagnostics and repair History information Information about critical events store in the Diagnostics Gauge status View History Diagnostic history screens Use these screens to view the newest and oldest trigger records of the following events e RAM corrupt e Sensor EEPROM corrupt e FLASH corrupt e Real time clock fail e Sensor temperature fail e Standardize due e Source wipe due e New hardware found e CPU EEPROM e Alarm type 1 e Alarm type 2 e Shutter check due e Sensor fail e Process out of range e Sensor voltage out of spec Use this information to determine if a problem has recently occurred and internally repaired An example of this would be an EEPROM corruption T4 LFXG H Technical Reference Manual Diagnostics and repair Summary of diagnostic alarm conditions Table 11 Diagnostic alarm conditions LFXG H Technical Reference M
120. plays o 5 o 5 d 5 S e i E E 5 UN E D Q D gt x rv KS e m E O 5 Ea ceo SZ CN co o0 O o Se o 2 G c lt x 5 c c 8 o id Q z Oo dt ae ed E 2 et T LE O o E k T X Figure 11 Online menu For a detailed list of HART screen sub menus see Appendix IV of this manual LFXG H Technical Reference Manual 17 Introduction Notes 18 LFXG H Technical Reference Manual Chapter 2 Installation Testing on the bench To ensure a quick start up after installation you can test the detector assembly with the HART compatible communication device either a universal hand held terminal or a personal computer with a HART modem and VEGA software Bench testing enables you to check the following e Power e Communication e Initial setup software parameters e Some diagnostics FiberHex 250 to 8000hm terminals 13 amp 14 load resistor optional AG Mini dips e H1 d i a HART modem H2 Transmitter RS 232 cable test points PC running Ohmart View Figure 12 Bench test setup Note You may need to reset the time and date if the transmitter has not had power for over 28 days The Real Time Clock Fail message may display It is important to enter the correct time and date because the clock is the basis for so
121. plays the frequency input counts from optional auxiliary input Filt counts Filtered counts displays the filtered auxiliary counts The filter dampening value is the number to enter for the auxiliary input filter time constant Min Max history The min max history displays the minimum and maximum value for parameters since the last min max reset The display values are Temp min max Temperature minimum and maximum displays the internal temperature of the scintillator sensor in the LFXG H model level transmitter Sensor min max The sensor minimum and maximum field displays raw uncompensated counts from the detector Aux in min max Auxiliary minimum and maximum displays auxiliary input if used counts Last reset Displays the date of the last min max reset 56 LFXG H Technical Reference Manual Advanced functions Resetting the minimum and maximum history You can reset the minimum and maximum history values so that they record from the time of the reset To reset the minimum and maximum history Procedure 10 Resetting the minimum and maximum history 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select Min max history 3 From the Min max history screen select Reset min max 4 When prompted select Yes to reset the min max values Or select No to cancel o Press F2 to save LFXG H Technical Reference Manual 57 Advanced functions New hardware or EEPROM corrupt The transmi
122. put 119 RC 101 rectangular window 102 Firmware version 68 Flash corrupt alarm setup 111 FLASH corrupt in diagnostic history 74 FLASH corrupt LED pattern 83 gain 47 Gauge moving 51 repeatability 43 GEN2000 Local RS 485 Network 138 grounding 23 hand held terminal 11 Hardware version 68 HART 11 HART Communicator 11 HART HHT screens and menus 167 189 Index HART load resistance 11 Heater 162 High level setting 47 High voltage displayed in process chain 56 History information 74 hot spot key 53 initial calibration new required 51 theory of 39 input filter 120 jumpers 81 Level instead of density is indicated See Select gauge type Licenses General and Specific 28 linear table 42 Linearity 49 linearizer linear table 42 non linear table 42 Linearizer choosing 42 Linearizer record 165 Linearizer table new 49 Linearizer table data 48 Low level setting 46 low temperature application 162 mA output test 61 Max and min history reset 57 Max level 55 Max Level 39 entry in initial setup 104 Measurement span new 51 Message user defined in System information 109 milliamp output test mode 61 Min level 55 Min Level 39 entry in initial setup 104 Min Max history 56 New hardware advanced function 58 New hardware found alarm acknowledge 76 alarm setup 111 diagnostics check 76 in diagnostic history 74 New hardware found message responses to 59 Next wipe shutter chec
123. r erosion of vessel that standardization cannot compensate for check standardize gain e Standardize gain is greater than 1 2 after a standardization indicating it made a 20 adjustment from the initial calibration Periodic process standardization Standardization adjusts the system by resetting one point of the calibration curve to an independently measured or known level The frequency of standardization depends on several factors including desired accuracy of the reading During the standardization procedure the system displays either e A default value for the standardization condition e A prompt to enter the actual level of the standardization condition The Initial factory setup appendix details how to set up the software for either prompt Automatic standardization reminder If you enable the standardization due alarm the level transmitter alarms when standardization is due The standardize interval is programmed into the calibration parameters setup Refer to Appendix Initial Factory Setup for details on the following subjects e Output relay setup e Standardization due alarm e Standardization interval LFXG H Technical Reference Manual 51 Calibration Performing a standardization otandardizing the gauge Procedure 9 Standardizing the gauge 1 From the Main menu select Calibrations 2 From the Calibrations menu select Process stdz 9 The Process stdz screen prompts if you want to take data Select Y
124. r required by applicable nuclear regulatory separately with source holder and following shutter check agency instructions Every three years unless otherwise Radiation safety instructions shipped required by applicable nuclear regulatory separately with source holder and following Source wipe agency instructions Source wipe and shutter check recording The LFXG H can automatically remind users when a source wipe and shutter check are due using the diagnostic alarms If you use this feature you must record the source wipes and shutter checks in the software to acknowledge the alarm and to reset the timer Perform the following procedure after a source wipe or a shutter check Refer to the Radiation Safety for U S General and Specific Licensees Canadian and International Users manual and the Radiation Safety Manual Addendum of Reference Information CD Recording a source wipe or shutter check Procedure 27 Recording a source wipe or shutter check 1 From the Main menu select Initial setup 2 From the Initial setup menu select System parameters 3 From the System parameters menu select Source function 4 From the Source function menu select Record wipe or select Record shut chk 9 At the prompt select Yes to start recording LFXG H Technical Reference Manual 89 Diagnostics and repair Check when the next source wipe or shutter check is due Procedure 28 Check due date of source wipe or shutter check 1 From the Main m
125. r to display the Primary channel screen The display values for the Primary channel screen are Temp Temperature displays the internal probe s measurement of the sensor temperature oensor cnts Displays the sensor counts that are true counts output from the sensor before application of the following e Temperature compensation e Standardize e Sensor uniformity gains TC counts Displays temperature compensated counts that are sensor counts with application of temperature compensation Raw counts Displays raw counts that are temperature compensated counts with application of uniformity gain LFXG H Technical Reference Manual 53 Advanced functions Adj counts Displays adjusted or sum counts that are raw counts plus auxiliary raw counts In most applications this does not use auxiliary input so sum counts are equal to raw counts SD counts Displays source decay counts that are sum counts with application of source decay gain otdz counts Displays standardize counts that are source decay counts with application of standardization gain 9o Cnt range Displays compensated measurement counts that express as a percent of the counts at the high and low endpoints of the calibration determined with the two point initial calibration This quantity shows where the current measurement is in relation to the total count range 9o count range 100 x C Cs C Cy where Cs sum counts Ci Cu counts at Cal low leve
126. ring 157 Figure 54 Interconnect DSGH with LFXG H 157 Algorithm for vapor comp 158 Variable definitions 158 Reference counts 158 Vapor density counts 158 VC gain 158 Initial settings and calibration for vapor comp 159 Setting up vapor compensation 159 Procedure 56 Setting up vapor compensation 159 Calibrating with vapor compensation 160 Calibrating with vapor compensation 160 Procedure 57 Calibrating with vapor compensation 160 Procedure 55 Calibrating with vapor compensation continued 161 Internal heater kit for applications requiring a 50 C rating 162 Table 25 Heater kit part numbers 162 Changes to specifications 162 X LFXG H Technical Reference Manual Preface Appendix III Preserving information from SmartPro to the LFXG H 163 Preserving information from SmartPro 163 Table 26 Smart Pro data record 164 Table 27 Linearizer record 165 Table 33 Linearizer record continued 166 Appendix IV HART menus and screens 167 Figure 55 HART screen Transmitter not connected 168 Figure 56 HART screen Online 169 Figure 57 Initial setup 170 Figure 58 Process parameters 171 Figure 59 System parameters 172 Figure 60 Alarms 173 Figure 61 Auxiliary input 174 Figure 62 Figure 63 Figure 64 Figure 65 Figure 66 Figure 67 Figure 68 Figure 69 Figure 70 Figure 71 Figure 72 Figure 73 Figure 74 Figure 75 Figure 76 Figure 77 LFXG H Technical Reference Manual View settings 175 Calibrations 176
127. rizer type 38 Check the repeatability of measurement Checking the gauge repeatability 43 Perform Set Cal low level and Step 1 Set low level 46 Set Cal high level Step 2 Set high level 47 Perform Cal result Step 5 Calculate calibration 49 38 LFXG H Technical Reference Manual Calibration Theory of calibration This section explains both the standard and simple methods of calibration Both calibration methods Enter the values that define the maximum and minimum levels to measure in the Process span screens from the Initial setup Process parameters Spans menus These parameters are Max Level and Min Level and must be set correctly before any of the calibration steps Both calibration methods Collection of data points nearest the Maximum but not higher and Minimum but not lower levels occurs during calibration Refer to the Two Point Cal procedure in this manual for the steps necessary to collect these data points In Figure 19 stars indicate the Maximum and minimum level data points Standard calibration method A standard calibration method requires collection of intermediate data points Use the Linear data collect function from the Calibrations Linearizer menus to collect these data points In Figure 19 circles indicate the intermediate data points Cal Low Counts Raw Sensor Counts Cal High Counts Max Level Level Cal Cal Low High Level Level Actual Level eng units Figure 19 Linear
128. rmation for special installations If your application is not in this chapter you may find application specific information on the certified drawings provided by VEGA or the engineering contractor If you have other application questions contact VEGA Field Service in the U S or Canada at 513 272 0131 or your local rep outside of the U S or Canada Note To use the compensation features of the HART gauge you must be using VEGA View 2 0 or higher or have a HART hand held communicator programmed with the VEGA COMP device description LFXG H Technical Reference Manual 121 Appendix Il Special applications Multiple detectors summation Some applications require a measurement length longer than the maximum level transmitter detector length Hand held terminal or PC FiberFlex with HART source holder 4to20mA current loop Frequency output to HART transmitter Figure 34 Multiple detectors summation 122 LFXG H Technical Reference Manual Appendix ll Special applications opecial drawings from VEGA Identification of applications that require multiple detectors occurs at the time of order The end user engineering contractor or both receive certified drawings for the exact equipment ordered Refer to the drawings along with this section of the manual Notes on the frequency output detector You may not receive a separate manual for the detector that provides the frequency output for the HART level transm
129. s This extra VEGA system places a second detector outside of the radiation beam of the primary detector The second detector only monitors x ray interference This detector has a frequency output that wires to the auxiliary input of the primary detector The primary detector s programming triggers the x ray alarm when the counts of the secondary detector are above a threshold Contact VEGA for more information about the x ray interference detection method output mA current loo X i E Dither level gt l time ms Dither time A i Cycle period Figure 24 X ray interference alarm output T8 LFXG H Technical Reference Manual Diagnostics and repair Hardware diagnostics Two circuit boards in the LFXG H are field replaceable They are the 1 Power supply board 2 CPU board Power Supply Terminal Block ft 5 ie REN oo Board RS 485 Ground if applicable CPU Board nternal Housing Ground Screw Figure 25 GEN2000 circuit boards LFXG H Technical Reference Manual 19 Diagnostics and repair The figure below is a simplified component layout COUNTS RO open H1 9 ei Baa Figure 26 GEN2000 circuit board components simplified Test points Test points are located on the power supply and CPU board Table 12 Power supply board test point labels and descriptions Power supply board Description test point label H1 HART connection H2 HART connection TP1 Isolated gro
130. s chain screen to view the variables affected by the auxiliary input counts value To view the Process chain screen back out of the test mode screens using the LEFT ARROW The transmitter continues to operate in auxiliary input test mode until it times out after one hour or until you choose Exit auxiliary input test mode Start auxiliary input test mode Procedure 17 Start Auxiliary test mode 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select Test mode 3 From the Test Mode menu select Aux Inp test mode 4 From the Aux Inp test mode menu select Aux Inp test mode 5 At the prompt select Yes to adjust counts 6 Input the Aux counts that you want to force T At the prompt select Yes to start test mode and send new data The transmitter continues functioning in auxiliary test mode until it times out after one hour or until you choose Exit Aux test mode Exit auxiliary input test mode Procedure 18 Exit Auxiliary test mode 1 From the Advanced Fxns menu select Test mode 2 From the Test mode menu select Aux Inp test mode 3 From the Aux Inp test mode menu select Exit Aux test mode 4 At the prompt select Yes to exit the test mode LFXG H Technical Reference Manual 65 Advanced functions Relay test mode Relay test mode enables the user to manually toggle the relay on or off to test the contacts This is useful for verifying the functioning of alarm annunciators otart relay test mode
131. screens ON Z S A L pa pa ON C pa ON Z pa epoui 3593 1X Wa SILL epoui 159 e Wa SIU Sai L epoui 159 41X9 Wa SIU Sai L epoui Eat 19 IIM SILL opouJ 19 opouy 39 9pouJ opouiJ js duie pq Z xne IIe c 9 DQ Z VUJ 158 c ON ON c ON c SOA S A SeA sjunoo jsnipy uano jsn py sjunoo jsnipy S junoo xny WP Sjunoo MEY Juelino jndjno ON Z ON Z ON C ON C SOA L SOA L SOA L SOA L 6 doo eBueuo xa 0 jueM 189 ejaJ IC geyep m u pues epoui eg eyep Meu pues epoui eg geyep meu pues epoui eg ON Hd HH SOA L sjunoo xne m u 1ndu sjunoo Mau 1ndu jueJno 1ndino m u ndul 9JnyeJeduie Meu pues e oJ ON Z ON Z ON Z eziDueue oq Z S9A L S9A L S9A uano nl eun jndjino sjunoo jsnipy s unoo jsnipy X enjuJedue eum sjunoo xny 44 sjnoo we AER epouiJ epouiJ epouu 159 por eL ng eziDJeuj s9 du xny 189 ap yw Jang 153 opoui opoui opoui opoui 9JnjeJeduio G 1591 ejaH p 1591 du xny e 1591 JOSUSS Z 9 INO Ww epoui Eal Figure 74 Test mode 185 LFXG H Technical Reference Manual Appendix IV HART menus and screens JSO0D ELD JSOD CLE HHHEHHH 4900 LLC HHH JSODOLC SJ902 duet MelA J900 duet Main Z VN VVVVV ON Eus J0sues 9 VN VVVVV ON JEH8S f dO S HH H JOA 94e MpJeH E H
132. t Level units From the Level units screen scroll through the list and choose the correct level unit for your process by pressing F4 to enter You will need to enter a custom unit if the unit you want is not in the list See the procedure for setting custom units in this section After selecting the units press F2 to send the information to the transmitter This ensures that other setup and calibration functions you perform use the desired engineering units LFXG H Technical Reference Manual Appendix Initial factory setup oetting custom units Procedure 32 Setting custom units 1 From the Main menu select Initial setup 2 From the Initial setup menu select Process parameters 3 From the Process parameters menu select Process units 4 From the Process units menu select Custom units 5 From the Custom units screen select Conversion to length 6 Enter the conversion factor in factor in custom units per inch T Press F4 to enter 8 Press the LEFT ARROW to move back to the Process units menu 9 From the Process units menu select Level units 10 In the Level units screen select Spcl as the units 11 If using a hand held HART Communicator press F2 to send the units to the transmitter This ensures that other setup and calibration functions use the correct engineering units Calibration parameters Data coll interval Data collection interval is the time in seconds over which the system collects a process measurement Use
133. t gives you permission to remove the lock You can verify whether the gauge is a general license gauge by checking the source holder for the general license tag If it is not there it is not a general license device If you do not have permission to remove the source holder lock an VEGA Field Service Engineer or another person with this specific license must remove it for you LFXG H Technical Reference Manual 29 Installation Field service commissioning call checklist In many U S installations an VEGA Field Service Engineer commissions the gauge To reduce service time and costs use this checklist to ensure the gauge is ready for commission before the Field Service Engineer arrives H Mount the source holder and detector per the certified drawings found in the custom information folder in this manual allowing access for future maintenance H Make all wiring connections per the certified drawings and the Wiring the Equipment section in this manual Tie in the wiring from the field transmitter analog output to the DCS PLC chart recorder H Ensure that the AC power to the transmitter is a regulated transient free power source UPS type power is the best H If using DC power verify that the ripple is less than 100mV H Have process ready for calibration H When possible it is best to have process available near both the low and high end of the measurement span v When possible it is best to be able to completely fill and empt
134. t loop output calibration at any time by using the test mode to output a user specified milliamp setting See the section Milliamp Output Test Mode in the manual LFXG H Technical Reference Manual 33 Calibration Choosing the calibration method For each installation the user must choose one of two ways to calibrate the level transmitter The best calibration method depends on how you use the continuous level transmitter Read the following table to decide which method to use Table 6 Calibration methods Standard method Simple method Use the standard method if the gauge is required to be Use the simple method if the gauge is only required to repeatable and accurately indicate the level of process be repeatable but need not accurately indicate the level throughout the span of process Typically used for vessels in which it is critical to know Typically used for surge bins or other vessels under the accurate level control that maintains one level The linearizer type chosen must be Non linear table The linearizer type chosen must be Linear table Note The simple calibration method produces a measurement indication that is repeatable but not accurate between the Cal Low Level and Cal High Level points The measurement indication is not linear with respect to the actual process level In some applications accuracy is not critical and this method is valid If your application requires a linear or accurate indication of t
135. ter configuration 148 responder function 146 LFXG H Technical Reference Manual Responder menu 149 RS 485 Network 153 responder function 145 responder gauge data 144 setting up 150 RS 485 network wiring 141 RS 485 software 141 SD source decay counts 54 Select gage location 70 Select Gage Location 70 Select gage type 70 Select gauge type 70 Sensor counts 53 Sensor EEPROM corrupt 60 alarm acknowledge 75 alarm setup 111 in diagnostic history 74 Sensor EEPROM status diagnostics check 75 sensor fail in diagnostic history 74 Sensor fail alarm acknowledge 76 alarm setup 111 Sensor high voltage fail alarm acknowledge 76 alarm setup 111 Sensor min max 56 Sensor serial number 68 Sensor status diagnostics check 76 sensor temp probe alarm acknowledge 75 Sensor temp probe test diagnostics check 75 sensor temperature alarm setup 111 in diagnostic history 74 Sensor test 61 Sensor test mode 63 sensor voltage 68 Sensor voltage 68 Sensor voltage out of spec in diagnostic history 74 Sensor voltage status diagnostics check 76 serial numbers 68 Setting zero 46 shutter check alarm setup 111 frequency 89 recording when complete 89 setting the interval 107 shutter check due alarm acknowledge 76 Shutter check due diagnostics check 76 in diagnostic history 74 Shutter check interval 107 Smart Pro transferring data from 163 Smart Pro data record 164 Source decay gain displayed in pro
136. ter the value of the current output you want to force 6 At the prompt select Yes to start the test mode and send new data T The transmitter continues functioning in milliamp test mode until it times out after one hour or until you choose Exit mA test mode Exit milliamp output test mode Procedure 14 Exit mA output test mode 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select Test mode 3 From the Test mode menu select mA Out test mode 4 From the mA Out test mode menu select Exit mA test mode 5 At the prompt select Yes to exit the test mode 62 LFXG H Technical Reference Manual Advanced functions Sensor test mode The sensor test mode simulates the sensor output at a user defined number of raw counts This is before application of the following e Temperature compensation e Sensor uniformity gain e Standardize gain The true sensor output is ignored while the transmitter is in sensor test mode Sensor test mode is extremely useful for verifying the electronics and software response to input counts without having to perform the following e Change the process e Shield the source e Vary the radiation field While in sensor test mode after entering the desired number of counts it may be useful to look at the Process chain screen to view the variables affected by the raw counts value To view the Process chain screen back out of the test mode screens pressing the LEFT ARROW The
137. test mode 62 Sensor test mode 63 Start sensor test mode 64 Procedure 15 Start Sensor test mode 64 Exit sensor test mode 64 Procedure 16 Exit Sensor test mode 64 Auxiliary input test mode 65 Start auxiliary input test mode 65 Procedure 17 Start Auxiliary test mode 65 Exit auxiliary input test mode 65 Procedure 18 Exit Auxiliary test mode 65 Relay test mode 66 Start relay test mode 66 Procedure 19 Start Relay test mode 66 Exit relay test mode 66 Procedure 20 Exit Relay test mode 66 Temperature test mode 67 Procedure 21 Start Temperature test mode 67 Exit temperature test mode 67 Procedure 22 Exit Temperature test mode 67 Other advanced functions 68 Checking the sensor voltage poll address equipment version serial numbers and temperature coefficients 68 Sensor voltage 68 Poll address 68 Firmware version 68 Hardware version 68 CPU Serial Number 68 Sensor Serial Number 68 View temperature coefficients 68 Checking the sensor voltage poll address version and serial numbers 69 Procedure 23 Checking equipment version and serial numbers 69 Select gauge type 70 Procedure 24 Select gage type 70 Select gauge location 70 Procedure 25 Select gage location 70 vi LFXG H Technical Reference Manual Preface Chapter 5 Diagnostics and repair 71 ooftware diagnostics 71 Alarms 72 Table 10 Alarm type summary 72 Diagnostic 73 History information 74 Summary of diagnostic alarm conditions 75 Table 11 Diagnostic alarm conditions 7
138. this interval time to collect data for e initial calibration e Linearizer curve e Standardization Warn span cal Warning percentage span calibration is the difference between the two initial calibration points cal low level and cal high level as a percent of level span that causes a warning to appear For a good calibration it is important for the two initial calibration points to be as far apart as possible The default value is 10 The user typically does not need to change this value for most applications LFXG H Technical Reference Manual 99 Appendix Initial factory setup Process stdz type Process standardize type determines how you enter the actual process value of a standardize sample If this is set as Use Lab sample value the software screens prompt entry of the sample value during a standardize If this is set as Use Default value the software always uses the Default standardize level as the sample value Default std Default standardize is the default level value in engineering units that you use in the standardization procedure At standardization enter the actual level of the process material to override this default Stdz interval Standardize interval is the interval in days between standardize alarms The level transmitter alarms to indicate that a standardize procedure is due if the diagnostic alarm Standardize due is toggled on Setting the calibration parameters Procedure 33 Setting the cali
139. transmitter continues to operate in sensor test mode until it times out after one hour or until you choose Exit test mode LFXG H Technical Reference Manual 63 Advanced functions Start sensor test mode Procedure 15 Start Sensor test mode 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select Test mode 3 From the Test Mode menu select Sensor test mode 4 From the Sensor test mode menu select Enter test mode 5 At the prompt enter the value of the new counts you want to force 6 At the prompt select Yes to start the test mode and send new data T The transmitter continues functioning in sensor test mode until it times out after one hour or until you choose Exit test mode Exit sensor test mode Procedure 16 Exit Sensor test mode 1 From the Advanced Fxns menu select Test mode 2 From the Test mode menu select Sensor test mode 3 From the Sensor test mode menu select Exit test mode 4 At the prompt select Yes to exit the test mode 64 LFXG H Technical Reference Manual Advanced functions Auxiliary input test mode The auxiliary input test mode simulates the auxiliary input frequency at a user defined number of counts The effect of auxiliary input counts depends on the auxiliary input mode Examples are e Temperature probe e Flow meter e Second transmitter While in auxiliary input test mode after you enter the desired number of counts it may be useful to look at the Proces
140. tter contains two electrically erasable programmable read only memory EEPROM chips The EEPROMs store all data specific to that sensor electronics pair for the installation The locations of the EEPROMs are e Onthe CPU board e Onthe sensor board Each EEPROM contains a backup of the other EEPROM The system monitors both EEPROMs at power up to assure an accurate backup If you install a new CPU board the EEPROM backups on the CPU and sensor boards do not match The software signals the discrepancy with the error message New Hardware Found The transmitter does not automatically perform a backup in case the discrepancy is not due to new hardware but some corruption of the EEPROM Note Only use the New hardware functions if you replace the CPU board This function is not necessary if installing a completely new detector assembly The new detector assembly includes the CPU board and the sensor assembly 58 LFXG H Technical Reference Manual Advanced functions Proper response to New hardware found message if new hardware has been installed When you install a new CPU board you must verify installation in the New hardware screen This function enables new backups of the EEPROMs If a new CPU board has been installed Procedure 11 New Hardware Found message with new CPU board 1 From the Main menu select Advanced Fxns 2 From the Advanced Fxns menu select New hardware 9 From the New hardware menu select New CPU board 4
141. tter not responding e Measurement not correct Hardware troubleshooting is only available at the board level LFXG H Technical Reference Manual 85 Diagnostics and repair Communication problem flowchart Communication problem suspected Start Firmware version is incorrect for Yes tag If you are daisy chaining multiple detectors see manual section Or call Ohmart Field Service to replace Get Factory firmware vXXX or Firmware non HART message m Yes Are current loop Yes Is load on 4 to 20mA Yes Go to wiring connections loop between 250 and B device OK 800 ohm No No No Correct wiring Add 250 ohm load resistor Yes connections across current loop Is Is HHT or current modem operating across load resistor properly Check between 2 amp on another 22 mA transmitter Refer to HART device manual for Transmitter troubleshooting or Replace HART Not device Responding Does Check current loop wiring Hook up HART device at transmitter connections Ched that transmitter at test points communicate with H1 and H2 hand held terminal load on loop is less than 800 ohm Transmitter Not Responding Get Lost connection to unit or Device disconnected Check current loop wiring Ye connections check that load on loop is less than 800 ohm No Figure 28 Communication problem flowchart
142. ual 135 Appendix Il Special applications Calibrating with NORM compensation Before calibrating make sure the NORM compensation option is set up Refer to Procedure 50 136 LFXG H Technical Reference Manual 10 11 12 13 Appendix ll Special applications Procedure 51 Calibrating with NORM compensation Set the product level to maximum Turn the source holder shutter to OFF this ensures that the only radiation picked up by the detector comes from the product and not the source Perform a data collect of the primary sensor e From the Main menu select Calibrations e From the Calibrations menu select Data collect e Record the value of the counts from the primary data collect From the Main menu select Initial setup From the Initial setup menu select Auxiliary input From the Auxiliary input menu select NORM From the NORM menu select Aux data collect At the prompt select Yes to take data Record the value of the counts from the Auxiliary data collect From the NORM compensation screen select Gain Adjust the gain value as follows e Compare the counts from the primary and auxiliary data collects e If the auxiliary channel data collect counts are higher than the primary sensor data collect counts adjust the NORM compensation gain down Select Yes to accept the counts and press F4 to enter e Ifthe auxiliary counts are lower than the primary counts adjust the NORM compensation gain up Repeat th
143. ular application Access the Ohmview 2000 electronic manual under Help for further information on setting up the gauge 152 LFXG H Technical Reference Manual Appendix ll Special applications Auto Zero feature Use this feature with the RS 485 network to provide data to the primary level gauge The counts feed into the level gauge from the low point indicator on the vessel When the level gauge senses a preset threshold value it implements the Auto Zero feature This feature resets the zero point oetting up the Auto Zero feature To enable this feature using Ohmview 2000 s RS 485 Network program you must have firmware 2000 30 or 30C or higher for GEN2000 instruments LFXG H Technical Reference Manual 153 Appendix Il Special applications Procedure 55 Setting up GEN2000 RS 485 local network 1 Determine the gauge and unit number for your point level indicators 2 Fillthe vessel until the process is just above the low process indicator and record the count 3 Fill the vessel until the process is just below the low process indicator and record the count 4 Calculate the 50 level of the two count totals This number is your auto zero threshold 5 Open the OHMVIEW 2000 Launcher program 6 Language Hien Click RS 485 NETWORK Main Screen Port Selection E Connect Exit This connects to the gauge that attaches to your HART modem 154 LFXG H Technical Reference Manual Appendix ll Sp
144. unDijuoo sJojouJeJed ae UIN Z uoiesu dwop Z DON adh eounos Z s OL JOH L SE o S IUN Ssaoo 9 9 XEN Ke je EC L pue oul 4d sDun1es indui SJojoujeJed SJ9jouje4ed suue v M9IA S Agumg p Wayshs Z SSe90Jd L dnjes jeu Figure 57 Initial setup H Technical Reference Manual LFXG 170 Appendix IV HART menus and screens 96 yun Ad HHH HHH Aue vul oz z 9o 4 Ausueg vu p ueds doo uano Z PAS UI C Jo TEE HHH OAS XEW L HHH jjo1no SEY S Dudu z Je MODpUIM PA Jay dx3 oH ueds eco sueds t adh au Duueuu HHH EA ZPE v TER pis ynejed c anjea 3jnejeq esf anjea ejduues qeq esf HHEH gu SUN u1Bu 0 uoisJaAuO L ed Zp sseooJg sun wono Z Duuo DE SS920Jd i 14 ueds eo UJeM Z lee JOO eyed L Jods Ww WwW LUED Uu ul SHUN 949 sun e o SJojoujejed IECH c Sjiun ssaooJd L SJojourejed SS990Jd Figure 58 Process parameters 171 LFXG H Technical Reference Manual Appendix IV HART menus and screens
145. und TP2 Loop current test point 200mV mA loop current Referenced to isolated ground Table 13 CPU test point labels and descriptions CPU test point label Description Count Raw input signal coming from preamp GND Logic ground U5 pin 8 5V power supply test points referenced to Logic ground 80 LFXG H Technical Reference Manual Diagnostics and repair Jumpers Jumpers JP1 and JP2 on the power supply board set the current loop source or sink mode Do not change the jumpers from the current setting without consulting VEGA Field Service The jumpers for the current loop power source or sink mode are set as follows Table 14 Jumper settings Mode Jumper setting Source mode LFXG H current loop is self powered JP1 1 2 JP2 2 3 Sink mode LFXG H current loop is DCS powered JP1 2 3 JP2 1 2 The LFXG H does not use jumpers J1 J4 on the CPU board LFXG H Technical Reference Manual 81 Diagnostics and repair LED indicators Check the basic functioning of the LFXG H at the instrument with LED indicators on the CPU board They are visible when you remove the explosion proof housing pipe cap See the Tables on page 84 for the summary of the LED indications Jaa av Janis gt Oo gt o Z x c c x c E ODU O EJ LI Cor Normal Flash Figure 27 LED indicators 82 LFXG H Technical Reference Manual FLASH corrupt LED pattern Diagnostics and repair The FLASH chip stores the device description DD software
146. upon the following e Sensitivity of the gauge e Temperature coefficient of the process material Protect insulation If insulation is between the measuring assembly and the process protect the insulation from liquids The absorption of a liquid such as water can affect the gauge indication because it blocks some radiation Avoid internal obstructions The best possible installation of a nuclear level gauge is on a vessel that has no internal obstructions agitator baffle manways and so forth directly in the path of the radiation beam If one of these obstructions is present it can shield the radiation from the detector causing an erroneous reading If the vessel has a central agitator the source holder and detector can mount to the vessel on an arc other than a diameter so that the beam of radiation does not cross the agitator You can also avoid other obstructions this way 20 LFXG H Technical Reference Manual Installation Avoid external obstructions Any material in the path of the radiation can affect the measurement Some materials that are present when the gauge initially calibrates pose no problem because the calibration accounts for their effect Examples of these materials are e Tank walls e Liners e nsulation However when the materials change or you introduce new ones the gauge reading can be erroneous Examples of these situations are e Insulation that you add after calibration absorbs the radiation and
147. urce decay calculations For instructions to set the time and date see page 106 Many users choose to calibrate the current loop output on the bench before mounting the detector on the process Refer to page 33 for further information on calibration of the current loop LFXG H Technical Reference Manual 19 Installation Location considerations At the time you ordered the level transmitter VEGA sized the source for optimal performance Notify VEGA prior to installation of the gauge if the location of the gauge is different from the original order location Proper location of the level gauge can sometimes mean the difference between satisfactory and unsatisfactory operation Note Try to locate the source holder in such a place that process material will not coat it This ensures the continuing proper operation of the source ON OFF mechanism Many regulatory agencies for example the U S NRC require periodic testing of the ON OFF mechanism Refer to the Radiation Safety for U S General and Specific Licensees Canadian and International Users manual and the Radiation Safety Manual Addendum of Reference Information CD that came with the source holder and the appropriate current regulations for details otable temperature Mount the level gauge on a portion of the line where the temperature of the process material is relatively stable Process temperature can effect the gauge indication The amount of the effect depends
148. ure test mode Procedure 22 Exit Temperature test mode 1 From the Advanced Fxns menu select Test mode 2 From the Test mode menu select Temp test mode 3 From the Temp test mode menu select Exit Temp test mode 4 At the prompt select Yes to exit the test mode LFXG H Technical Reference Manual 67 Advanced functions Other advanced functions Checking the sensor voltage poll address equipment version serial numbers and temperature coefficients When performing diagnostics it may be important to know the following information e Sensor voltage e Poll address e Version of firmware on the FLASH installed on the level transmitter e Hardware version number e Equipment serial numbers e Temperature coefficients Sensor voltage Sensor voltage displays the scintillator sensor voltage Poll address Poll address displays the HART poll address of the transmitter Each transmitter in a current loop must have a unique poll address This value is meaningful only when multiple transmitters connect on the same loop Firmware version Firmware version displays the firmware version number Hardware version Hardware version displays the hardware version number CPU Serial Number CPU Serial Number displays the CPU serial number Sensor Serial Number Sensor Serial Number displays the sensor serial number View temperature coefficients The algorithm that compensates for variations in measurement output with changes in
149. values It enables the system to measure the process and report the number of sensor counts For more information about counts and the calculations performed to produce the final process value see the Process Chain section in the Advanced Functions chapter You can perform a data collect three or four times on the same level to check the repeatability of the sensor If the sensor counts vary widely you should increase the Data collection interval parameter from the Initial setup menu Process parameters menu Data coll interval screen Refer to page 99 for further information LFXG H Technical Reference Manual 43 Calibration Performing a data collect Procedure 8 Performing a data collect 1 From the Main menu select Calibrations 2 From the Calibrations menu select Data collect 3 At the prompt select Yes to enable the data collection to take place The on screen counter displays the time left Press F3 to abort if necessary to discontinue data collect 4 After data collection the screen displays the number of counts cnts output by the sensor Make note of the counts value 5 Repeat as often as necessary if checking repeatability Calibrating the gauge The standard calibration method involves five main steps 1 Setting the low level and collecting Cal low data Setting the high level and collecting Cal high data 2 3 Collecting linearizer data 4 Calculating the linearizer 5 Calculating the calibration
150. y the vessel at the high and low levels for the initial calibration procedure and when possible at 1096 increments in between for the linearization procedure v Donot remove the lock on the source holder Notify VEGA Field Service if there is damage to the lock or it is missing 30 LFXG H Technical Reference Manual Chapter 3 Calibration All of these functions group together in the Calibrations screens See Appendix IV of this manual for Calibrations menus and screens Before using the level transmitter to make measurements you must perform the following e Calibrate it to relate the detection of radiation from the source to the level of the process material e Calibrate the current loop to a reference ammeter or the DCS e Periodically you must standardize the system on process to adjust for changes over time Calibration establishes a reference point or points that relate the detector output to actual or known values of the process You must perform a calibration before the gauge can make measurements of any accuracy Perform the calibration after the installation and commission of the gauge at the actual field site You do not need to repeat the calibration procedures as long as certain critical process and equipment conditions remain the same See When a New Calibration May Be Necessary in this manual The gauge requires only a periodic standardization to compensate for changing conditions LFXG H Technical Refer

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