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1. 0 1000 2000 3000 4000 5000 Flow Rate acfh Figure 5 1 2 Dattus fM2 at Atmospheric Conditions Dattus fM Meter Technical Reference Guide 5 3 Differential Pressure in w c Differential Pressure Testing Differential Pressure Calibration Curves Atmospheric Pressure 3 Dattus fM2 2 0 1 5 1 0 0 5 0 0 0 1000 2000 3000 4000 5000 Flow Rate acfh Figure 5 2 3 Dattus fM2 at Atmospheric Conditions Dattus fM Meter Technical Reference Guide 5 4 Differential Pressure in w c Differential Pressure Testing Differential Pressure Calibration Curves 2 Dattus fM2 M E Hu zech o 3000 Flow Rate acfh Figure 5 3 2 Dattus fM2 Up To 5 000 cfh Lower Pressures Dattus fM Meter Technical Reference Guide 5 5 Differential Pressure in w c Differential Pressure Testing Differential Pressure Calibration Curves 2 Dattus fM2 psig 10 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Flow Rate acfh Figure 5 4 2 Dattus fM2 Lower Pressues Dattus fM Meter Technical Re
2. Differential Pressure Testing Differential Pressure Calibration Curves 3 Dattus M2 psig CO3 Ul BINSSdjg ENUIA 1000 2000 3000 4000 5000 6000 7000 8000 9000 0 Flow Rate acfh Figure 5 8 3 Dattus fM2 Lower Pressures 5 10 Dattus fM Meter Technical Reference Guide Differential Pressure in w c 12 11 10 Differential Pressure Testing Differential Pressure Calibration Curves 3 Dattus fM psig 75 60 45 1000 2000 3000 4000 5000 Flow Rate acfh Figure 5 9 3 Dattus fM2 up to 5000 acfh Higher Pressures Dattus fM Meter Technical Reference Guide 5 11 Differential Pressure in w c Differential Pressure Testing Differential Pressure Calibration Curves 3 Dattus fM2 psig 40 30 75 25 60 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Flow Rate acfh Figure 5 10 3 Dattus fM2 Higher Pressures Dattus fM Meter Technical Reference Guide 5 12 Temperature Calibration Chapter 6 Temperature Calibr
3. V valve ball 4 1 4 2 volume accumulation converted 2 4 unconverted 2 3 Dattus fM Meter Technical Reference Guide
4. recycling options or proper disposal 7 Re insert the fresh batteries into the battery compartment see Figure 7 3 Figure 7 3 Inserting Fresh Batteries If the battery alarm symbol does not disappear refer to Chapter 9 Troubleshooting for recommended corrective action 8 Close the battery compartment door by pushing the door into the opening and rotating the door clockwise until it locks in place 9 If applicable refit a new tamper seal to the battery compartment 10 Re attach the external cover Dattus fM Meter Technical Reference Guide 7 3 Maintenance Index Head Replacement From time to time it may be necessary to replace the index on a Dattus fM meter The following procedure describes the necessary steps to perform this operation in the field Materials List Small flat blade screwdriver External Snap Ring Pliers Computer with PC Link configuration software installed 1 Remove the external cover by loosening and removing two external cover mounting screws For additional details on removing the cover refer to Chapter 3 Installation and Programming 2 Using a pointed device remove the red security seal See Figure 7 4 E EE Figure 7 4 Security Seal Removal 3 Using a small standard screwdriver back out the 8 screws around the perimeter of the index cover and the 1 screw behind the red security screw removed in the previous step These screws will not fall out as they are captive i
5. 7 Figure 3 7 Removing the External Cover 2 Remove seals if fitted in the meter 3 Remove the meter seal on the index housing to expose the mounting screws 4 Remove the index housing by loosening its nine 9 index housing screws see Figure 3 8 Figure 3 8 Loosen the Index Housing Screws Dattus fM Meter Technical Reference Guide 3 7 Installation and Programming 5 On the exposed index board set the programming switch see Figure 3 9 to ENABLE position Figure 3 9 Programming Switch Location 7 Verify the PROG message flashing on the display 8 Program the meter 9 Return the programming switch to the OFF position 10 Close the index housing and replace seal if applicable 11 Re attach the external cover and replace seal if applicable Installation Verification To verify the installation follow this procedure 1 Verify that no alarm symbols or alarm codes are currently displayed on the meter See Chapter 8 Alarms for additional alarm details 2 Verify that the magnetic wand or optional push button increments the displayed values 2 If applicable check for the correct temperature display value using either a reference thermometer or an approximate indication 4 If applicable check for a reasonable pressure reading display value by making sure that the reading matches the meter s expected pressure Dattus fM Meter Technical Reference Guide 3 8 Proving Chapter 4 Proving This chapter
6. I I I 1 EE Figure A 4 Pulse Output Electrical Schematic Dattus fM Meter Technical Reference Guide A 2 Glossary Glossary Term Accuracy Error Proof Absolute Pressure Absolute Temperature Absolute Zero Accuracy Curve ACFH Definition The ratio of the volume registered by the meter divided by the volume registered by the reference multiplied by 100 Accuracy meter volume reference volume x 100 The ratio of the volume registered by the meter minus volume registered by the reference divided by the reference volume multiplied by 100 Error meter volume reference volume reference volume x 100 The ratio of the volume registered by the reference divided by the volume registered by the meter multiplied by 100 Proof reference volume meter volume x 100 Atmospheric pressure plus gauge pressure abbreviated as psia Absolute pressure is used in all gas law equations That temperature obtained in degrees Rankin by adding 459 67 to a reading of a Fahrenheit thermometer or in degrees Kelvin by adding 273 15 to that of a Celsius thermometer reading R 459 67 F K 273 15 C Temperature at which all molecular movement stops 0 R Graphical expression of accuracy of a meter as a function of flow Actual cubic feet per hour The meter reading without pressure temperature or compressibility correction Ambient Temperature The temperature of the atmosphere surrou
7. Normal Battery alarm Critical 6 b Oscillation sensor warning Normal an b Oscillation sensor failure Critical Oscillation sensor contamination Normal Critical after 24 hours A single code number may at times represent multiple alarm types occurring simultaneously For example Code 9 represents a combined temperature and battery alarm Table 8 3 Alarm Codes Code Temperature Flow Rate Batter Alarm Oscillation Oscillation Oscillation Alarm 1 Alarm 4 Sensor Sensor Sensor Warning 16 Failure Contamination 32 64 ROBBERS EERE 8 I 64 P P Ke P P PE P E Ooo Oooo WE P PE a a Ox Sr e 8 O So oa S x lt Dattus fM Meter Technical Reference Guide 8 3 du d olli gll IA III oje w N al EE LZ WEE E E EECH Oo XxX el EE E 2 Pe a es a eel al PX o Xx ea o gt g i T l l x lt Ee x lt Temperature Alarm The meter triggers a temperature alarm when it detects a non acceptable reading from the temperature probe The temperature alarm is updated every 20 seconds whenever temperature measurements are made Dattus fM Meter Technical Reference Guide 8 4 Alarms Display The meter displays the following information during a temperature alarm However all of this information is viewable in PC Link Dattus Parameters Alarms if it is not on the display e areading of 999
8. and communicated Force per unit area applied to a surface Pressure Force Area Device for measuring the accuracy of gas meter registration A ratio Qmax Qmin expressing the range of flow in which a meter accurately measures within a defined set of accuracy parameters i e a range of 50 1 for 100 1 accuracy range The maximum flow rate at which a meter may be operated Standard Cubic Foot That quantity of gas which under an absolute pressure of 14 73 psia and at a temperature of 60 F base conditions occupies a volume of one cubic foot A device designed to give evidence of meter tampering Ratio of the density of gas to the density of air under equivalent pressure and temperature conditions The minimum flow rate required to have registration of gas flow A meter index used to display corrected volume under flowing gas conditions to a base temperature commonly 60 F A device for determining the accuracy of a meter under test by comparing its reading against the reading obtained from a calibrated reference meter connected in series with the meter under test The flow rate Qt at which the error channel will open up to a wider band Dattus fM Meter Technical Reference Guide G 2 A absolute temperature 2 5 accumulated volume register 2 3 actual temperature 2 5 adapter box 4 1 4 4 administrator access mode 3 7 alarm battery 7 1 8 5 code 8 1 codes 3 8 8 1 8 3 critical 8 2 current 8 1 8 2 flow r
9. are dead Replace with fresh batteries Uncorrected Volume is Not Batteries are dead Replace with fresh Updating on the Display batteries No gas flow Check the meter set Sensor Error Alarm Internal Fluidic Oscillations sensors have failed Contact Actaris Customer Service Dattus fM Meter Technical Reference Guide 9 1 Corrected Volume is Not Updating on the Display No Uncorrected Volume Pulse Generation No Corrected Volume Pulse Generation Alarm Pulse Output is Not Generated Temperature Alarm Batteries are dead No gas flow Pulse output is not configured The wrong pulse output channel is configured Batteries are dead Pulse Output cable is not correctly connected to meter or external pulse accumulator Pulse output is not configured The wrong pulse output channel is configured Temperature alarm Pulse Output cable is not correctly connected to meter or external pulse accumulator Alarm pulse output is not configured Pulse Output cable is not correctly connected to meter s External Connector Dattus fM Meter Technical Reference Guide Troubleshooting Test the temperature probe in a reference bath s replace if necessary Replace with fresh batteries Check the meter set Program pulse output Check channel pulse output setting using PC Link configuration soft ware Replace with fresh batteries Verify meter connection and wiring Program puls
10. differential pressure and flow rate Dattus fM Meter Technical Reference Guide 5 1 Differential Pressure Testing 4 Refer to the graphs shown in Figure 5 2 through Figure 5 7 to determine the approximate accuracy of the meter Select the graph with the appropriate line pressure and flange size that has the best resolution for the flow rate at which measurement has taken place 5 To use the graphs first locate the corresponding differential inches w c on the Y axis Follow across the graph until you reach the curve Once you find the curve go straight down to the X axis to locate the corresponding flow rate Compare the flow rate on the graph to the flow rate from the index display using the following formula Flow Rate from Chart Flow Rate from Index Flow Rate from Chart x 100 For example using the graph in Figure 5 2 a differential of 0 50 inches w c shows a flow rate of 2640 acfh Compare the reading from Dattus s instantaneous flow rate display If the meter display shows 2612 acfh then the approximate meter accuracy is 1 06 The calculation is shown below 2640 2612 2640 x 100 1 06 Keeping in mind the overall resolution of the paper differential charts this is a very good result Dattus fM Meter Technical Reference Guide 5 2 Differential Pressure in w c Differential Pressure Testing Differential Pressure Calibration Curves 2 Dattus fM2 Atmospheric Pressure 1 0
11. hole thread depths Figure 1 6 Dattus Meter Dimensions Table 1 2 Dimensions Dattus A C Thread Depth Flange Model Size fM2 16 3in 10 4in 6 75 in 1 0 in 2 in 3 in ANSI 125 41 5 cm 26 5 cm 17 1 em Note Adapter kit is available for 9 5 flange retrofit Liquid Crystal Display LCD Figure 1 7 shows the LCD on the Dattus Gas Meter The LCD provides eight 8 digits and symbols that offer indication of meter values The first item on the display will be the primary index This will be either the uncorrected or corrected volume as appropriate Channel 1 Pulse Active Output Alarm Indicator Communications Mux Mode Battery Indicator Figure 1 7 LCD Display Dattus fM Meter Technical Reference Guide 1 8 Table 1 3 explains each of the 8 possible digits General Information Table 1 3 Typical Digit Display Items Uncorrected Volume Corrected Volume Corrected Flow Rate Uncorrected Flow Rate Corrected Flow Rate Uncorrected Flow Rate Fixed Pressure F indicates fixed factor pressure Temperature F indicates fixed factor temperature Correction factor Alarm codes Dattus fM Meter Technical Reference Guide Number of digits is programmable from 4 to 8 Number of digits is programmable from 4 to 8 Metric units 4 digits left and 2 digits right of decimal point Metric units 3 digits left and 2 digits right of decimal point Imperial units 6 d
12. of the Dattus Meter Technical Reference Guide provides general instructions on how to connect and test a Dattus fM Meter with a rotary transfer prover Materials List Dattus fM2 Gas Meter a Rotary Transfer Prover and software Rotary Transfer Prover hoses for pressure and temperature 25 foot or longest available 4 inch proving hose 3 foot 3 inch proving hose available from Actaris Damper available from Actaris Ball Valve available from Actaris Allen Wrench 1 4 inch Dattus Optical Probe available from Actaris Dattus Optical Proving Adapter Box available from Actaris Dattus Proving Cable available from Actaris Connecting the Meter Damper and Rotary Transfer Prover The rotation of rotary pistons creates pulsations in the gas stream The pulsation is caused by the effective opening and closing of the gas flow This effect is known to skew the measured accuracy of turbine meters when a rotary transfer prover is used Utilities that desire to test turbine meters with rotary transfer provers typically use dampeners to remove some of the pulsation effect and obtain a more accurate test result The use of a dampener is necessary to test Dattus meters as well The dampener is not intended for use as a pressure vessel While there are other dampeners available Actaris has designed a dampener specifically to remove the pulsations while remaining compact and portable for use by field personnel see Figu
13. the flow of gas through the meter 5 2 Obstacle Flow Induces Divided d Oscillation 3 Flow Recombined Operating Principle of M Meter Internal View Figure 2 2 Flow Diagram Gas enters the meter 1 and divides into two separate flow paths 2 These two flows recombine 3 as they exit the flow entries and enter the fluidic oscillation chamber through the nozzle This process of dividing the flows eliminates upstream disturbances and creates a well conditioned flow In the fluidic oscillation chamber a jet is formed as the gas enters through the nozzle 4 The jet then starts oscillating back and forth 5 Thermal sensors located just after the nozzle 4 detect a temperature variance as the gas jet passes from one side to the other The volume of gas passed through the meter is obtained by counting the number of oscillations detected by the thermal sensors The Gas passes around the obstacle and exits the meter 6 Dattus fM Meter Technical Reference Guide 2 2 Theory of Operation Electronic Architecture The block diagram shown in Figure 2 3 represents the major functions of the meter The integrated nature of the electronics of the meter ensures reliable execution of the following functions Management of the volume accumulation Management of alarms Action of the magnetic switch or push button to display the next values Storage in non volatile permanent memory of data and values Volume and alarm out
14. the inlet pressure tube in the pressure tap center by first wrapping gas pipe sealing tape around the threads and rotating the tube clockwise into the tapped hole until tight see Figure 4 4 Inlet Pressure 8 Prover Line Hose Connection Temperature Probe Figure 4 4 and Temperature Tube Installation Pressure Dattus fM Meter Technical Reference Guide 4 3 Proving 4 Inthe same manner install the temperature probe tube in the inlet tap 5 Finish the assembly by clamping the prover hose to the outlet of the meter Volume Pulse Output Connection Connect the optical probe to the DB 9 connector on the adapter box Place the optical head on the optical port on the meter Connect the proving cable to the round connector on the adapter box o Oo N O Connect the Cannon connector end of the proving cable to the pulse input connection box on the proving system see Figure 4 6 10 Make sure the Optical Proving Adapter switch is in the Proving position Optical Proving Adapter OUT PRESS Figure 4 6 Optical Probe Output to Proving System Dattus fM Meter Technical Reference Guide 4 4 Proving Recommended Transfer Prover Test Setups The meter pulse output is factory set to transmit 1 pulse for every 10 actual cubic feet of uncorrected gas passed through the meter For example running 100 cubic feet through the meter causes 10 pulses to be transmitted To test using TC mode optic output must be cha
15. 1 only corrected volume uncorrected volume or alarms 1 Program the desired pulse type and pulse weight using PC Link configuration software Dattus Parameters Outputs Dattus fM Meter Technical Reference Guide 3 4 Installation and Programming 2 Connect the pulse output cable available from Actaris to the Pulse Output connector on the meter Figure 3 5 Remote Pulse Accumulator to Index 3 Connect the appropriate wires to a pulse accumulator device Table 3 1 identifies each wire on the pulse output cable Part Number 442461 003 Table 3 1 Pulse Output Cable Wire Functions em ear we rrn White 1 Alarm Channel 2 Channel 1 4 Orange Channel 2 Alarm 5 Red Channel 1 4 Test connections using the pulse accumulator s software Dattus fM Meter Technical Reference Guide 3 5 Installation and Programming Programming The Dattus meter can be customer configured To program the meter the following tools are needed e Personal Computer e Actaris optical cable The Dattus fM meter is programmed using the Actaris PC Link software For detailed programming information refer to the PC Link User s Manual or the help files accessible within the PC Link software Communication Before you can communicate with a meter PC COM ports serial ports that PC Link will use to communicate with the Dattus meter must be identified This normally occurs automatically during installation of the
16. 5 5 Differential Pressure Testing GET E 5 1 Differential Test Procedure 0 ccceeeececceseececeeeeececeeueeeeceseceeecnsaeeeecseeesecuneeseanseeesaneness 5 1 6 Temperature Calibration Materials EE 6 1 Festing Be E WE 6 1 Dattus fM Meter Technical Reference Guide Table of Contents D Maintenance Battery Replacement EE 7 1 Index Head Ee ut 7 4 Replacing the Temperature Pro eis stats oacscossiacs anpsiaviabesulnsdanruubseonddunnmraibieustduaiaseueans 7 10 8 Alarms EECH enge 8 1 Alarm e 8 1 G rrent Vs Stored E 8 2 Alarm E TEE 8 2 Normal Alarm Consequences sessssesseseesesernetnttttstnetntttestnstnntnnstnstnnnnnnnnnnennnn ne 8 2 Critical Alarm Consequences AA 8 2 Metrological Alarm Conseouences AAA 8 2 Alarm ee EE 8 3 Temperature FAINT EE 8 4 EU 8 5 Battery Alarm EE 8 5 Oscillation Sensor DiaQnostics cccescceecceeeeecsseeeeeeeeeceseeeeseeeneeneaaesneesnneeeeeanenees 8 6 el e 8 6 Sensor Warning ciinii a aa ara edEeEE 8 6 Sensor Faille ssns ien a a a aa E a 8 7 EENEG ere E de 8 7 Resetting E sca casiosnar ssieetans secu canssenes ce tions ented ineietuetgesddunaactedeseeenataas beertennteeee 8 7 9 Troubleshooting A External Connections Pulse Output COMING CION teat icaphextecctees pak en ita deead ted apaes E a a adds itebadl abaad uettaaheahineaaes A 1 Electrical Connection for Pulse Output A 2 Dattus fM Meter Technical Reference Guide General Information Chapter 1 General In
17. 6 Figure 7 16 Opening the Index Housing 5 Identify and remove the temperature probe connector from the index board socket see Figure 7 17 Temperature Probe Connector Socket Figure 7 17 Temperature Probe Connector on Index Board 6 With a small flat head screwdriver loosen each of the three wire terminal screws and remove the wires from the connector Dattus fM Meter Technical Reference Guide 7 11 Maintenance 7 Remove the old probe from the thermal well by loosening its fastening using two 19 32 inch 15 mm wrenches If necessary use one wrench to loosen the nut while using the other wrench to prevent the base of the thermal well from also rotating Figure 7 18 Removing Probe from Thermal Well 8 Pull the temperature probe cable through the cable gland on the index housing 9 Pull the new probe cable through the cable gland 10 Connect the three wires to the screw terminals according to color scheme shown in Figure 7 19 and Table 7 10 Figure 7 19 Temperature Probe 3 Terminal Connector Top View Table 7 10 Temperature Probe Connector Wire Colors Wire Color Dattus fM Meter Technical Reference Guide 7 12 11 12 13 14 15 16 17 18 Maintenance Snap the temperature probe connector to the system board Tighten the probe cable gland fastening nut around the cable and then 1 2 turn Reset any alarms using the PC Link configuration software Verify that no alarm indication a
18. 9if there is no accepted measurement correction factor displayed 00 0000 an alarm symbol if so programmed and code Consequence e The method of storing data changes e The corrected volume index stops accumulating during the alarm e The value of the corrected and uncorrected volume index when the alarm appeared are stored in non volatile registers along with the alarm code e The pulse output of corrected volume stops while the alarm is active e The alarm pulse output is activated if so programmed and remains active for a duration of 20 minutes unless the source of the alarm disappears The last alarm to appear resets the 20 minute counter Flow Rate Alarm The flow rate alarm that applies only to uncorrected volume activates if the uncorrected volume flow rate is greater than the maximum flow rate The flow rate alarm triggers after 20 seconds of continuously exceeding the programmed maximum threshold Q max Display The meter displays the following information during a flow rate alarm Alarm symbol and code if so programmed Consequence e The alarm pulse output is activated if so programmed and remains active for 20 minutes unless the source of the alarm disappears The last alarm to appear resets the 20 minute counter e There is no effect on storage Battery Alarm The basic meter has a typical battery life of 10 years 3 650 days This is decremented each day until it reaches 90 or another programma
19. Al ACTARIS metering systems Dattus fM Meter Technical Reference Guide PROPRIETARY RIGHTS NOTICE Copyright 2001 Actaris Metering Systems ALL RIGHTS RESERVED This manual is an unpublished work and contains the trade secrets and confidential information of Actaris Metering Systems which are not to be divulged to third parties and may not be reproduced or transmitted in whole or part in any form or by any means electronic or mechanical for any purpose without the express written permission of Actaris Metering Systems All rights to designs or inventions disclosed herein including the right to manufacture are reserved to Actaris Metering Systems The information contained in this document is subject to change without notice Actaris reserves the right to change the product specifications at any time without incurring any obligations Trademarks used in this manual Dattus is a trademark of Actaris Metering Systems Gas Micro is a trademark of Galvanic Applied Sciences Inc Pete s Plug is a trademark of Peterson Equipment Company Inc Other brands or product names are the trademarks or registered trademarks of their respective holders Dattus fM Meter Technical Actaris Metering Systems Reference Guide 970 Highway 127 North Owenton KY 40359 9302 Literature No GA 0007 GB 04 02 Tel 502 484 5747 Part No D0202201 Fax 502 484 6223 www ActarisUSgas com Preface Regulatory Notices Intrinsic Safety for Hazardou
20. Appendix A_ External Connections This appendix of the Dattus fM Meter Technical Reference Guide provides technical details for the meter s pulse output connections see Figure A 1 Pulse Output Connector Pin Locations Figure A 1 Pulse Output Connector Pin Locations Figure A 2 shows a schematic of the pulse output cable with its pin locations Not used d Green Pin 4 Red Orange gt 8 Figure A 2 Pulse Output Cable Dattus fM Meter Technical Reference Guide Appendix Electrical Connection for Pulse Output This schematic assumes that there is a connection between the ground of the power supply and the ground of the scada unit Sometimes it is just not possible to separate these two grounds The Dattus will accept floating ground connection Global connection e The negative of the Scada unit is connected to the negative of the power supply e The positive of the same power supply is connected to the negative of the Dattus e The positive of the Dattus is directly connected to the positive of the Scada unit 24Volts Figure A 3 Dattus to Scada Connection Schematic Dattus Pulse Output Electrical Schematic e The resistor R limits the current to avoid a destructive short on the output e The zener diode D protects the pulse output from reverse current l R i 1 ee l i l Sees l I od I I 15 ohm e VC H d N l n I 7 N I ETA D 1 I l l l l
21. Factor Volume Correction The volume can be corrected to reference conditions using one pre programmed value for pressure The display of the pressure will have an Fon the far left of the display to indicate that the value is fixed see Figure 2 4 Figure 2 4 Fixed Value Display Calculation of Flow Rate The uncorrected volume flow rate Qm is calculated from i volume of gas v increment of time The maximum displayed flow rate will be stored and resettable The corrected volume flow rate Qc is calculated from Qc Qu XC If variations in Qu are less than 20 a smoothing algorithm is applied to generate an average flow rate based on a longer time period Dattus fM Meter Technical Reference Guide 2 4 Theory of Operation Calculation of Correction Factor The correction factor C is calculated using the following formula C Cas where Cpis the pressure correction factor given by sE D where Tb and T are absolute temperatures The parameters Pp Tp and Z allow the measured volume to be translated to the equivalent volume measured under reference conditions Tp is typically 60 F Py is typically 14 73 psia The precision of the correction factor C is 0 5 This factor is re calculated every 20 seconds Dattus fM Meter Technical Reference Guide 2 5 Installation and Programming Chapter 3 Installation and Programmin This chapter of the Dattus fM Meter Technical Reference Guide provides i
22. PC Link software Occasionally however you may need to configure ports if the default choices are not available Port configuration options can be found under File Preferences Communication Parameters The COM ports used by PC Link must be available for use and not dedicated for another application If another device such as a PDA Personal Digital Assistant has dedicated a COM port for its application the COM port may appear to be available for use by PC Link but errors may occur If a PDA application is running on your PC it may show up in the active programs area of the Windows Status Bar Optical Link After attaching the optical head the optical link enables communication between the meter and a portable PC as shown in Figure 3 6 This is a temporary link for reading and writing meter values Figure 3 6 Optical Communications Link Dattus fM Meter Technical Reference Guide 3 6 Installation and Programming Programming Access Normal Access Mode To activate Normal Access mode 1 Connect a personal computer to Optical probe 2 Access the meter using the PC Link configuration software Communication Logon Administrator Access Mode Canada only You can access this mode by the programming switch as described here To activate Administrator Access mode 1 Remove the external cover by loosening and removing two external cover mounting screws and lifting the external cover away from the measurement unit see Figure 3
23. an acceptable accuracy level Rotary meter manufacturers as well as individual utilities have established differential limits that infer acceptable unacceptable meter accuracy Differential tests can also be performed on Dattus fM There is no increase of differential pressure associated with dirt build up or worn parts because Dattus fM has no moving parts For Dattus fM differential pressure will not be a function of friction but can be linked to the overall accuracy of the meter The following table lists differential data at common flow rates For additional differential data refer to the graphs shown in Figure 5 2 through Figure 5 10 Table 5 1 Pressure Drop at Atmospheric Pressure gas 0 6 specific gravity 9 000 4 89 8 600 4 48 7 000 5 700 5 000 3 850 1 00 So to oa Materials List e Meter to be tested with pressure test connections in the inlet and outlet pressure taps e Pressure gauge e Differential pressure gauge or manometer with high enough pressure capability to meet operating meter s demands e Dattus fM differential pressure curves from this manual Differential Test Procedure 1 Connect the pressure gauge in the pipe and record the line pressure 2 Attach the differential gauge to the inlet and outlet test connectors Pete s Plugs of the meter to be tested 3 After differential pressure reading is obtained find the instantaneous flow rate reading from the Dattus index LCD readout Record both the
24. and contains the following information e Meter serial number e Maximum Allowable Operating Pressure MAOP e Maximum flow rate e Minimum flow rate e Manufacturer name e Meter model name e Date of manufacture e Meter Volume CV Labels oii A ACTARIS Dattus Gu CE YS 1WA8 Pressure Transducer No XXXXXXXX Imp XXXXX Serial No XXXXXXXX ZIZb XXXXX Approval No XXXXXXXX Gas XXXXX Temperature Range XXXX XXXX Tb XXXXX Pressure Range XXXX f XXXX Pb XXXXX intcinmiceily wage shan installed using Deg 442000 003 EExia Il C T4 amir Ee Waly Sich Mistery ee Ex LCIE 01 E6061X Figure 1 10 Meter Label Dattus fM Meter Technical Reference Guide 1 13 General Information The information label is a plastic label on the side of the external cover This plate identifies the functionality of the index The meter serial number on the meter body and the index serial number on the label may not be from the same series of numbers The label contains the following information Manufacturer name Index serial number if needed Year of manufacture Temperature range for correction Pulse outputs register and weight Gas type Intrinsic safety reference and supplementary information CE and UL approval information Base Temperature Country of Origin Dattus fM Meter Technical Reference Guide 1 14 Theory of Operation Chapter 2 Theory of Operation This chapter of the Dattus fM Meter Technical Ref
25. ate 8 5 icon 8 2 messages 7 10 metrological 8 2 operation 8 1 oscillation sensor failure 8 7 output 1 12 2 3 3 4 8 2 resetting 8 7 re transmission1 12 sensor 8 6 symbol 8 1 symbols 3 8 temperature 8 4 types 8 1 alarms 1 9 stored 8 2 8 7 average flow rate 2 4 B backup sensor 8 6 ball valve 4 1 4 2 4 5 basic configuration 1 3 battery alarm 8 5 change event 7 2 compartment 7 1 7 3 connector 7 2 7 3 disposal 7 3 life 8 5 lifetime counter 7 2 seal 7 1 voltage 8 5 battery alarm 7 3 8 5 Bernoulli s theory 2 1 Cc cable pulse output 3 5 Index Rotary Transfer Prover 4 1 temperature probe 7 10 cable gland temperature probe 7 10 cable gland nut 7 10 caps inlet outlet 3 1 Coanda effect 2 1 conditioning flow entry 2 1 configurations basic 1 3 ETC 1 3 connector battery 7 2 7 3 optical 3 6 pulse output 3 5 temperature probe 7 12 corrected volume 1 12 2 4 correction factor 2 5 critical alarm 8 2 current alarm 8 1 8 2 D Damper 4 1 4 2 differential data 5 1 differential pressure testing 5 1 dimensions 1 8 display 1 8 E electronic index 2 1 ETC configuration 1 3 event battery change 7 2 event log 1 3 8 1 8 2 external cover 1 4 3 7 F Features 1 3 fixed factored pressure value 2 4 flow conditioner 2 1 flow rate 5 1 alarm 8 5 average 2 4 fluidic oscillation chamber 2 1 2 2 fluidic oscillation principle 1 2 2 1 H handling and storage 3 1 Dattus fM Met
26. ation This chapter of the Dattus fM Meter Technical Reference Guide provides general instructions on how to test and calibrate the temperature probe on the Dattus fM meter Temperature Probe Testing Temperature probe testing involves applying one or more known reference temperatures to the meter temperature probe If the meter temperature probe does not agree with the references it must be adjusted using the PC Link configuration software or replaced with another probe For details on replacing the probe see Chapter 7 Maintenance Materials List Magnetic wand Reference temperature source s Computer with PC Link calibration software 19 32 inch 15 mm wrenches 2 Medium blade slotted screwdriver Testing Procedures 1 Remove the external cover by loosening and removing two external cover mounting screws For additional details on removing the cover refer to Chapter 3 Installation and Programming Lift the cover away from the measuring unit Loosen the cable gland cap using two 19 32 inch 15 mm wrenches If necessary use one wrench to loosen the nut while using the other wrench to prevent the base of the cable gland from also rotating Lift the probe up and out of the thermal well see Figure 6 1 Place the temperature probe in the reference temperature source see Figure 6 2 e me Cable Gland Cap Temperature Probe Thermal Well Figure 6 1 Removing the Probe from Thermal Well Dattus fM Mete
27. ble value days from the theoretical end of the battery life where Dattus fM Meter Technical Reference Guide 8 5 Alarms the alarm is then activated Additionally if the battery voltage falls to less than 2 0V this alarm is activated The battery alarm is triggered either by the life time counter that is decremented at midnight each day or if the battery voltage falls below the accepted minimum Display The meter displays either of the following information during a battery alarm if so programmed Lo Bat appears on the index if so programmed Alarm codes 008 appear if so programmed Consequence The alarm output is activated and remains active for 20 minutes The last alarm to appear resets the 20 minute counter The output pulses if programmed will be disabled There is no effect on the indexes The alarm condition will not reset itself even if the battery voltage recovers to above the threshold 2 0V On changing the battery the counter is reset to 3 650 days at midnight if two batteries are present or 1 825 days if only one battery is present Oscillation Sensor Diagnostics The sensor alarm will be triggered if the oscillation sensors become unbalanced including open circuit The active sensors are verified each hour backup set is verified each day at midnight If there is an error with either the primary or backup the sensor warning will be set If the remaining sensor gives an alarm th
28. cal Reference Guide 7 7 Maintenance 12 Replace the top Teflon washer over the meter housing shaft on the new index housing and Install retaining ring to secure the new index head to the meter See Figure 7 11 Te ES 7 y Fi Figure 7 11 Snap Ring Replacement 13 Plug in meter sensors to new index Connector with Orange Yellow replaced closest to battery connection board See Figure 7 12 Figure 7 12 Sensor Connection 14 Plug the main Battery cable connection on the board of the new head Next plug in the back up battery cable The index will count down Reset 15 Place new desiccant bag in the new index head See Figure 7 13 Dattus fM Meter Technical Reference Guide 7 8 Maintenance Figure 7 13 Desiccant Replacement 16 Close the lid while ensuring no cables are caught between the lid seal and housing If seal came loose during opening push seal back onto guide tabs Tighten the 8 outer screws and the one placed behind the red security seal 9 Total Insert Red security seal into index face See Figure 7 14 Figure 7 14 Security Seal Replacement 17 If ETC version insert RTD into meter housing and secure gland onto connection with wrench Orient head tuck RTD wiring in place around new head and prepare for cover 18 Replace meter cover and fasten with 2 Phillips head screws 19 Reset meter alarms using PC Link Configuration software Communication Device Rests Dattus fM Meter Technical Reference G
29. crews For additional details on removing the cover refer to Chapter 3 Installation and Programming 2 Lift the cover away from the measuring unit and locate the battery compartment access door see Figure 7 1 3 Rotate the index head as necessary to access the battery compartment 4 Open the battery compartment access door by grasping the door handle and rotating the door counter clockwise see Figure 7 1 Dattus fM Meter Technical Reference Guide 7 1 Maintenance Battery Door Figure 7 1 Battery Compartment Access 5 Remove the old batteries from the compartment e Disconnect the first battery and attach a fresh battery making sure the connectors snap securely in place Figure 7 2 Repeat with the second battery e The meter will detect the presence of a battery on each connector and the lifetime counter will reset automatically An event will be logged to indicate that the battery has been changed At midnight on the day of the battery change the lifetime counter will be adjusted Figure 7 2 Connecting Batteries Dattus fM Meter Technical Reference Guide 7 2 Maintenance 6 Properly discard the old batteries The product you have purchased contains lithium batteries The batteries are recyclable At the end of their useful life under various state and local laws it may be illegal to dispose of these batteries into the municipal waste stream Check with your local area solid waste officials for details about
30. e outputs Check channel pulse output setting using PC Link Configuration software Verify Temperature Probe Verify meter connection and wiring Program the meter s alarm pulse output NOTE The conditions that trigger alarm pulse output depend on how the meter is programmed Connect pulse output cable to Dattus External Connector 1 Alarm Re transmission Starts No Optical Communication Temperature probe malfunction Flow Rate exceeded the maximum threshold Battery voltage falls below the accepted minimum for meter operation Optical communication probe is in the wrong position on the index housing Incorrect personal computer PC serial COM port is selected PC set up with another application using COM port such as palm pilot Dattus fM Meter Technical Reference Guide Troubleshooting Note Conditions that trigger alarm pulse output depend on how the meter is programmed Test the temperature probe in a reference bath s replace if necessary Verify the flow rate at the meter set does not exceed the meter s maximum rated flow rate Replace with fresh batteries as soon as possible Modify the orientation of the probe The probe cable should be placed between the two raised position indicators in the index cover at approximately the 6 o clock position Make sure the PC serial COM port is properly configured Deactivate application and re boot Appendix
31. echnical Reference Guide provides information on how to quickly and effectively isolate and resolve typical problems that may be encountered while operating the meter Table 9 1 provides a listing of common symptoms possible causes and recommended corrective action Refer to Chapter 8 for a detailed description of meter alarms and possible causes Table 9 1 Troubleshooting Common Symptoms Temperature Alarm Temperature probe Test the temperature probe malfunction in a reference bath s 999 9 Displayed as replace if necessary Temperature Flow Rate Alarm Flow Rate exceeded the Verify that the flow rate at maximum programmed the meter set does not threshold exceed the maximum rated flow rate of the meter Oscillation Sensor Warning Primary internal oscillation Contact Actaris technical sensor has malfunctioned support and the meter is now using the backup sensor Sensors are damaged or defective Oscillation Sensor Failure Primary amp backup internal Contact Actaris technical oscillation sensors have support malfunctioned Sensors are damaged or defective Oscillation Sensor Primary or backup internal Contact Actaris technical Contamination Alarm oscillation sensor is support contaminated Actaris will recommend the use of a filter in that meter site Battery voltage falls below Replace with fresh the accepted minimum for batteries as soon as meter operation possible No Display on Meter Batteries
32. em in the future are classified as Normal alarms Normal Alarm Consequences When normal alarms are detected the alarm code is available on the display The alarm icon is shown if so programmed and the alarm output is activated if so programmed The alarm is entered in the event log The meter will continue to operate normally during this alarm since there should be no effect on accuracy of the meter Critical Alarm Consequences When a Critical Alarm is detected the alarm code is available on the display The alarm icon is shown if so programmed and the alarm output is activated if so programmed The alarm is entered in the event log In addition special steps are taken to preserve the integrity of the meter for as long as possible If there is a sensor error the screen locks and displays SEn Err The alarm codes are therefore not available on the display but local communication is still active Metrological Alarm Consequences When a metrological alarm is detected the same steps are take to indicate the alarm as mentioned above and the meter stops incrementing the Corrected Volume register The Volume under Alarm conditions register is incremented so that a bill can be estimated based on the best information available Dattus fM Meter Technical Reference Guide 8 2 Alarms Alarm Codes Table 8 2 lists the alarm codes and their consequences Table 8 2 Alarm Codes and Consequences Temperature alarm Megegesl Ge rate alarm
33. en the sensor failure alarm is set The primary sensor is evaluated for contamination each day If the primary sensor is evaluated to be contaminated then the test is done every hour If the contamination persists for 24 hours then the critical alarm is set Consequences Sensor Warning e Continue to accumulate uncorrected volume Vm and corrected volume Vc e Display alarm code 16 e Pulse outputs continue Dattus fM Meter Technical Reference Guide 8 6 Alarm output is triggered Event log entry is set Sensor Failure Registration stops in all registers LCD index locked to display SenErr Pulse output stops Alarm output set This alarm can not be reset Event in the event log Sensor Contamination Registration stops in all registers Display alarm code 064 Pulse output stops Alarm output set Event in the event log Resetting Alarms event Dattus fM Meter Technical Reference Guide Current alarms automatically reset themselves as soon as the cause of the alarm ceases Stored alarms can only be reset by programming the meter memory with PC Link configuration software Communications Device Resets The alarm symbol on the display remains visible whenever the meter contains a stored alarm Alarms With current alarms the stored alarms cannot be reset until the source of the alarm has been properly addressed Troubleshooting Chapter 9 Troubleshooting This chapter of the Dattus fM Meter T
34. enient access to the various internal gas chambers for monitoring pressure This unit is made of an aluminum structure that ensures gas tightness up to line pressures of 150 psi Dattus fM Meter Technical Reference Guide 1 3 General Information Pressure Taps Gas Inlet Figure 1 2 Measurement Unit Index Housing The index housing see Figure 1 3 contains the index board and batteries that provide the main functionality of the meter The housing is made of a UV stabilized polycarbonate material designed to reduce the risk of damage from significant shock impact This housing has a configurable index orientation Communication with the meter is accomplished through the optical port To scroll the displayed values a magnetic switch or optional push button if provided is used Magnetic emt Switch CORRECTED VOLUNE ft X 100 WWOORRECTED VOLUME ft UNCORRECTED FLOW RATE ft HR GAS PRESSURE psig GAS TENPERATURE CT COMPRESSIBILITY RATIO CORRECTION FACTOR ALARU CODES SN 1234507890 Optical Volume Communication Pulse Port Output Connector Figure 1 3 Index Housing Layout Dattus fM Meter Technical Reference Guide 1 4 General Information External Cover The external cover see Figure 1 4 provides both mechanical and tamper protection to the temperature probe Figure 1 4 External Cover Meter Seals Various meter seals are available e External Cover Seal s optional seals the
35. ent log that is accessible using PC Link configuration software Alarm memory can be reset using the software Alarm Causes The meter manages the following alarm types Temperature probe failure Uncorrected flow rate exceeded maximum for more than 20 seconds Batteries need to be replaced Oscillation sensor warning Oscillation sensor s failure Oscillation sensor s contamination Dattus fM Meter Technical Reference Guide 8 1 Alarms Current vs Stored Alarms Current alarm codes appear on the display as long as the source of the alarm persists However once the cause of the alarm is resolved the current alarm automatically resets and the alarm code disappears from the left side of the display The Alarm symbol also remains on the display when an alarm event has been stored in memory but has not yet been reset Alarms are automatically stored and remain in memory until the alarms are reset However the alarm event will remain recorded in the Event Log Alarm Consequences There are three levels of consequence depending on the type of problem detected and the likely impact on uncorrected data Problems that will affect the accuracy of the metrology are classified as Metrological Alarms Problems that could render the meter non operative are classified as Critical Alarm conditions that may indicate a problem with the installation violation of contract terms or may be indicative of a more substantial probl
36. er Technical Reference Guide l installation 3 1 Impellers 5 1 index board 3 8 7 5 7 11 electronic 2 1 housing 1 4 1 5 3 7 7 1 7 4 7 10 7 11 J jet nozzle formation 2 1 jet flipping action 2 2 M magnetic switch 1 4 2 3 magnetic wand 1 3 1 4 1 11 3 8 MAOP 1 6 Maintenance 7 1 metrological alarm 8 2 8 3 N non volatile memory 2 3 0 optical connector 3 6 port 3 6 4 4 probe 3 6 4 4 oscillation sensor failure alarm 8 7 output alarm pulse 8 5 P power supply 1 7 pressure gauge 5 2 pressure tap 4 3 probe optical 3 6 4 4 temperature 6 1 7 6 7 10 programming switch 3 8 prover hose 4 1 4 2 proving 4 1 pulse accumulator 3 4 pulse output cable 3 4 4 1 4 4 pulse output connector 3 4 pulse outputs 1 7 pulse type 1 7 Index R register accumulated volume 2 3 resetting alarms 8 7 rotary meter 5 1 Rotary Transfer Prover 4 1 Rotary Transfer Prover cables 4 1 S seal battery 7 2 seals 1 5 security seals 3 7 sensor alarm 8 6 sensor contamination 8 6 sensor failure 8 7 serial links 3 6 shut down 3 3 3 4 specifications 1 6 start up 3 3 3 4 stored alarms 8 1 8 7 T tamper seals 7 1 temperature alarm 8 4 temperature corrected volume 4 5 theory of operation 2 1 thermal sensor device 2 1 thermal well 6 1 7 6 7 12 thermometer 6 1 timing error 4 5 transfer prover 4 2 transfer prover cable 4 4 troubleshooting 9 1 U unpacking and inspection 3 1 uncorrected volume 2 3 4 4
37. er Technical Reference Guide G 1 Drift Energy Gauge Pressure Index MAOP Maximum Flow Meter Accuracy Meter Connections Minimum Flow Non volatile Memory Optical Port Pressure Prover Rangeability Rated Capacity SCF Seal s Specific Gravity Start Flow Temperature Compensating Index Transfer Prover Transition Flow Rate Glossary regulating device Slow change of a metrological characteristic of a measuring instrument The capacity to do work heat measured in the same units as work Energy may be transferred from one form into another Measured pressure relative to atmospheric pressure taken as zero abbreviated as psig Measured pressure above atmospheric pressure The device that displays the volume of gas that has passed through the meter Maximum Allowable Operating Pressure The maximum safe operating pressure The maximum flow Qmax Capacity of a meter The degree to which a meter correctly measures the volume of gas passing through it determined by comparing the volume registered by the meter with that registered by the prover The integral parts of the meter designed for attachment to meter swivels pipe or other piping components The minimum flow rate Qmin at which the accuracy falls in a defined tolerance range Data memory that is not dependent on battery voltage for persistence Port located on the front face of the meter through which the meter can be programmed
38. erence Guide describes the operation and conversion principles It also explains the electronic architecture and provides various calculation formulas for the Dattus fM Gas Meter Operating Principle The operation of the Dattus fM meter is based on the fluidic oscillation principle This static metering technology is based on Bernoulli s theory a slow moving high pressure gas becomes a fast moving low pressure gas at the nozzle exit forming a jet of gas The gas jet once formed can be controlled by the Coanda effect using an obstacle in the flow that is designed to optimize the performance of the meter Controlling the gas jet path enables the formation of feedback pressure nodes on either side of the gas jet resulting in a predictable oscillation of the gas jet The metrology of the meter relates to the mechanical design of the fluidic oscillation chamber and conditioning flow entry The gas jet oscillations are detected using a thermal sensor device that provides metering data to the meter s electronic index The measurement unit consists of three functional elements e flow conditioner e jet nozzle formation e fluidic oscillation chamber Figure 2 1 shows the various elements Conditioning Fluidic Oscillation Flow n A Chamber Thermal Sensors Nozzle gt A Ces Obstacle Figure 2 1 Measurement Unit Elements Dattus fM Meter Technical Reference Guide 2 1 Theory of Operation Figure 2 2 shows
39. exceeding 4 psi per second with the small bleed valve V3 To Start Up the Meter Slowly open the outlet valve V2 to pressurize the metering line not exceeding 4 psi per second When the metering line is fully pressurized fully open the outlet valve V2 Check for leaks by applying soapy water to the joints and looking for air bubbles 2 3 4 Open the inlet valve V1 5 Close by pass valve V4 6 Check that the flow does not exceed the capacity of the meter Dattus fM Meter Technical Reference Guide 3 3 Installation and Programming Installation without a By Pass Figure 3 4 shows meter installation without a by pass Figure 3 4 Installation without a By Pass To Shut Down the Meter 1 Slowly close the outlet valve V2 2 Close the inlet valve V1 3 Open the bleed valve V3 and slowly depressurize the metering line not exceeding 4 psi per second To Start Up the Meter 1 Slowly open the inlet valve V1 to pressurize the metering line not exceeding 4 psi per second Open the outlet valve V2 until the outlet pressure is stable 2 3 Check for leaks by applying soapy water to the joints and looking for air bubbles 4 Fully open the outlet valve V2 5 Check that the flow does not exceed the capacity of the meter Inputs Outputs To a Remote Pulse Accumulator The meter can be fitted with pulse output connectors These pulses can represent temperature only corrected volume Channel
40. ference Guide 5 6 Differential Pressure in w c Differential Pressure Testing Differential Pressure Calibration Curves 2 Dattus fM2 psig 14 13 90 12 11 75 10 Ke 60 45 30 0 1000 2000 3000 4000 5000 Flow Rate acfh Figure 5 5 2 Dattus fM2 Up To 5 000 cfh Higher Pressures Dattus fM Meter Technical Reference Guide 5 7 Differential Pressure in w c Differential Pressure Testing Differential Pressure Calibration Curves 2 Dattus fM2 psig 40 90 35 75 30 60 N Wu N CH 30 Wu 10 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Flow Rate acfh Figure 5 6 2 Dattus fM2 Higher Pressures Dattus fM Meter Technical Reference Guide 5 8 Differential Pressure Testing Differential Pressure Calibration Curves 3 Dattus fM2 psig Differential Pressure in wc 2000 3000 Flow Rate acfh Figure 5 7 3 Dattus fM2 up to 5000 acfh Lower Pressures Dattus fM Meter Technical Reference Guide 5 9
41. formation This Dattus fM Meter Technical Reference Guide provides information important to the installation operation and maintenance of the Dattus fM Gas Meter Actaris recommends that you read the entire guide before attempting installation tests operation or maintenance of the meter This chapter contains a general description of the meter information about the meter s features metering applications and meter specifications In addition to this chapter this guide contains the following chapters Chapter 2 Theory of Operation Chapter 3 Installation amp Programming Chapter 4 Proving Chapter 5 Differential Pressure Testing Chapter 6 Calibration Chapter 7 Maintenance Chapter 8 Alarms Chapter 9 Troubleshooting Appendix A External Connections Glossary Dattus fM Meter Technical Reference Guide Describes technical details on the meter design and operation Contains instructions for installing the meter as well as information and proce dures for programming and starting the meter Contains basic instructions on proving the meter Contains basic instructions on differential pressure testing Contains basic instructions on testing and calibrating the temperature probe Provides information and instructions for replacing the batteries an index and a temperature probe Provides details on the possible alarms generated by the meter Provides information on how to quickly and effectively ident
42. ideiascsenistavtedenactiatadaonetasees 1 13 2 Theory of Operation RS TTI FP FC EE 2 1 Electronic Architecture ccccccsccececccecsssseceeceeeesceeseseeseseceesesseuseaaeseseeeesseusesaeeeseeeeseeeeees 2 3 Uncorrected Volume Accumulation aneo0eennnnnnneoseoenrnnnensseonrnnnrnnneeernnnrnnnnnneeneennn 2 3 Corrected Volume Accumulation cacccaxssecccorssusteesedusccsenauedapnsdusenoinwnciennetunadsortunanteedunas 2 4 Dattus fM Meter Technical Reference Guide Table of Contents Fixed Factor Volume Corre ction cccccecccccccceceeeeceeceececeacsucececececeaeansaeeteeseneeaeaaaaess 2 4 Calculation of Flow Hate 2 4 Calculation of Correction Fachor 2 5 3 Installation and Programming Handling Ke TEE 3 1 Unpacking and ISOS CHOM E 3 1 Mechanical Mounting E 3 2 Start up Shut down Procedures scccssscsessecsssseesessecseseeesseeecseeeesseeeesseeeecseseesseeeessneees 3 2 Installation with a EE 3 3 Installation without KEE Seeerei 3 4 ae free eaa a E eet ery ere tee er eer eeree rer er 3 4 reene occ set ote chat tn deed casei E hee cuea ob kaw ecnia dsl dias TA 3 6 las lee AMO EE 3 6 Programming ACCOSS E 3 7 Installation Verification EN 3 8 4 Proving Materials EE 4 1 Connecting the Meter Damper and Rotary Transfer Prover ccccsscecsssesssteeseneees 4 1 Connecting the Pressure Temperature and Pulse Output Cables c ccceseeeeees 4 2 Recommended Transfer Prover Test Setups A 4
43. ify and resolve typical problems that may be encountered while operating the meter Contains pin out descriptions of external connectors Provides a listing of terms and definitions General Information Using This Manual The Dattus fM Meter Technical Reference Guide provides hardware related information about the Dattus meter Note boxes provide essential information about using the Dattus fM Meter Technical Reference Guide certain operations Warnings provide special must read information If you ignore a warning you may omit essential data or make a critical error that could cause bodily harm or severely damage the meter Warnings are in bold text V Cautions provide information that is important to consider when performing General Description The Dattus fM Meter see Figure 1 1 is intended for use in light industrial and commercial sites Features available in the meter include Volumetric flow measurement Temperature Correction Fixed Factor Pressure Correction Display of the instantaneous flow rate Logging of events Pulse outputs of corrected and uncorrected volume and alarm events Figure 1 1 Dattus fM Meter Model fM2 shown here Dattus fM Meter Technical Reference Guide 1 2 General Information Meter Configuration Dattus fM gas meters have two typical configurations e Basic the standard meter features and fixed factor capabilities e ETC the basic version with a temperature probe
44. igits no decimal point Imperial units 5digits no decimal point Metric units as shown Imperial units 3 digits to left and 2 to right of decimal point Metric units as shown Imperial units as shown As shown ED General Information The display updates every 2 seconds unless the display switch is activated in which case the display will be updated in the next 0 25 second processing The display is powered up continually and if there is no display switch activation then the displayed parameter will revert to either the uncorrected volume or corrected volume configurable in the software The time out duration is programmable with 180 seconds default The volume display scale can also be programmed to display quantities using decade multipliers The number of digits 4 8 can also be programmed using the software For each parameter the display shows the number of digits indicated Values that are less than the full number of digits have leading zeros Table 1 4 provides a listing of the displayable items in alphabetical order All of the registered values in the meter are displayable Table 1 4 Displayable Items Alarm Codes I Flow Rate Threshold Alarm Passed Volume Atmospheric Pressure Ml Fixed Gas Pressure H Gas Temperature _ _ Lifetime Maximum Flow Rate Lifetime Maximum Temperature H Meter Volume Per Cyce Base Temperature Minimum Temperature Threshold Battery Life days H Month
45. is closure is reset after 20 minutes and remains open until another alarm is activated See Chapter 8 Alarms for detail information on the alarms Event Logger The event logger is a database function It checks for an event occurrence every minute If an event has occurred the event code the date and the time are recorded The log can contain 178 events and 22 last occurrence events This log is circular The events that are logged are shown in Table 1 5 Table 1 5 Events Logged Battery Alarm Low Voltage or Days Expired Meter Reset either power outage or watchdog reset Oscillation Sensor Failure Critical Oscillation Sensor Contamination Oscillation Sensor Warning Dattus fM Meter Technical Reference Guide 1 12 General Information Meter Badges and Labels There are a variety of meter badges and labels offered to meet different market requirements The standard meter has a metal badge mounted on the meter body and a label mounted on the index cover There is also a provision for mounting an additional metal plate that can be used to identify the utility s serial number for the meter Meter Badges ACTARIS Dattus USA MAX FLOW 9000 CFH MODEL _ MINFLOW 22CFH MAOP 150 PSIG in fM2 VOLUME 0 23 CF FLOW m DATE SERIAL NO Figure 1 9 Meter Badge The meter badge is an aluminum plate mounted permanently to the cast body of the meter This plate identifies the meter and its service limitations
46. ly Back up Index Battery Voltage E Monthly Uncorrected Volume nde 8 E E E E E A Back up Corrected Volume Back up Temperature Base Pressure Compressibility Ratio Monthly Corrected Volume Index Corrected Flow Rate Serial Number Corrected Volume Station ID Correction Factor System Date Corrected Volume at Alarm System Time Decimal of Corrected Volume Uncorrected Volume at Alarm Decimal of Uncorrected Volume ncorrected Flow Rate Firmware Version W Uncorrected Volume A magnetic switch or optional push button selects the displayed value The currently selected value is indicated by an arrow along the bottom edge of the display CHIC To change the displayed value the operator passes a magnetic wand over the switch see Figure 1 8 With each pass the selection changes to the next value immediately to the right The chosen value is indicated by an arrow on the bottom of the display and points to a number which is indicated on the front panel Dattus fM Meter Technical Reference Guide 1 10 General Information Figure 1 8 Magnetic Switch Operation Power Supply Lithium batteries power the meter These batteries provide a nominal operating life of 7 10 years based on typical usage Remote Pulse Outputs The meter provides a Form A type pulse output Two pulse output channels are configurable by using PC Link software with the choice of uncorrected volume corrected volume temperature corrected volu
47. me channel 1 only or none The connected inputs must have the following characteristics be compatible with standard Namur be approved as intrinsically safe have the following electric limitations including the connection cable Umax lt 16 5 V and Idc max lt 50 mA Pulse Outputs of the Uncorrected Volume The uncorrected volume output has a programmable pulse weight of 1 1000 volume units per pulse The pulse has a duration of 250ms The minimum time between pulses is 250ms The maximum output pulse rate of the meter 2 pulses per second may cause an overflow of output pulses If this occurs the pulses will be accumulated in a buffer and trickled out at 2Hz until all accumulated pulses are transmitted Dattus fM Meter Technical Reference Guide 1 11 General Information Pulse Outputs of the Corrected Volume The corrected volume output has a programmable pulse weight of 1 1000 volume units per pulse The pulse has a duration of 250ms The minimum time between pulses is 250ms The corrected volume pulse is updated every 20 seconds causing pulses to be streamed and so overflow of pulses is possible Activating unused output channels or using low pulse weights will reduce battery life Pulse outputs of the Temperature Corrected Volume are only available on Channel 1 Alarm Outputs The alarm is an open collector output allowing pulse output of the current alarms If the contact is closed there is an active alarm Th
48. mounted in the gas flow These configurations may vary depending on added options In addition to these Dattus options an fM meter may also be equipped with the Gas Micro Electronic Volume Correction plaform This option gives an fM meter full pressure and temperature correction as well as logging and communications capabilities For specific information on the capabilities and features of the Gas Micro platform please refer to the Gas Micro Operator s Manual Standard Features The basic meter performs volume metering based on the gas pressure and temperature in the meter The following functions are available Gas volume totaling Fixed factor correction Volume and alarm pulse outputs Non volatile memory for storing values and data Optical communication port for reading writing of values Eight item programmable display Magnetic switch to change display values Circular event log Power management Optional Features In addition to the standard functionality of the basic configuration the following options can be added Temperature correction using a temperature probe mounted in the gas flow Push button to change display values Meter Parts The Dattus fM Meter is composed of three main parts measurement unit index housing and external cover Measurement Unit The measurement unit See Figure 1 2 is the only part of the meter that is exposed to the gas A series of threaded taps provide conv
49. mounting screws on the external cover Protects access to the temperature probe pressure transducer and batteries e Index Housing Seal seals the index housing Protects access to the index board and other electronic components eg programming switch temperature probe screwed connection e Measurement Unit Seal optional seals the measurement unit Protects against unauthorized opening of the measurement unit e Battery Access Door Seal optional seals the battery access door with a seal wire Protects against unauthorized access to the batteries The locations of the seals are shown in Figure 1 5 Optional Connector Seal Top View Optional Battery ACCESS Door e Seal l E e External Index aw amp CA EES Seals Housing Seal Figure 1 5 Meter Seal Locations Dattus fM Meter Technical Reference Guide 1 5 General Information Specifications Table 1 1 provides the specifications for the meter Table 1 1 Meter Specifications __ Meter Type Meter Model Flanges 2 inch and 3 inch ANSI 125 Maximum Allowable 150 psig 10 bar Operating Pressure MAOP Flange to Flange Length 6 75 171 mm Display Programmable up to 8 digits for meter quantities and alarms Display Sequence Magnetic switch or push button Activator option Operating Temperature 40 F to 140 F Range Weight 37 Ibs Construction Measurement Unit Cast aluminum A356T6 Index Housing UV stabilized p
50. n the cover See Figure 7 5 Figure 7 5 Loosen Index Cover Screws Dattus fM Meter Technical Reference Guide 7 4 Maintenance 4 Unplug the backup battery cable connection on the board Next unplug the main battery cable See Figure 7 6 Figure 7 6 Battery connections 5 Unplug the two sensor connectors See Figure 7 8 Figure 7 8 Sensor Connections Dattus fM Meter Technical Reference Guide 7 5 Maintenance 6 If the Dattus fM meter is equipped with a temperature probe for Electronic Temperature Compensation remove the probe from the thermal well as shown in Figure 7 7 E Cable Gland Temperature __ Thermal Well Figure 7 7 Temperature Probe Removal 7 Using a pair of retaining ring pliers with a 038 tip remove the ring holding on the head unit See Figure 7 8 Figure 7 8 Retainer Ring Removal 8 Remove the Teflon washer exposed by removal of 7 Dattus fM Meter Technical Reference Guide 7 6 Maintenance 9 Lift off the index head carefully pushing wires through opening in bottom of the head See Figure 7 9 Figure 7 9 Remove Index 10 Look to ensure there is a large Teflon washer on the meter side of the housing and that the blue O ring is still in tack on the brass connection shaft See Figure 7 10 Figure 7 10 Brass Index Connection 11 Place the new head on over the brass connector onto the large white Teflon washer on the meter housing Dattus fM Meter Techni
51. nding the equipment or area Atmospheric Pressure Measure of the weight of the earth s atmosphere at a given place and time At Base Conditions Base Standard Pressure Base Standard Temperature Compressibility Correction Factor sea level atmospheric pressure is approximately 14 696 psia The standard base conditions of pressure and temperature for the volumetric measurement of natural gas ANSI API 2562 1969 has established 14 73 psi as the base pressure and 60 F as the base temperature to which all volumes are commonly referred The standard base condition of pressure used for the volumetric measurement of natural gas ANSI API 2562 1969 has established 14 73 psia as the base pressure to which all volumes are commonly referred Base pressure is normally defined in gas measurement contracts The standard base condition of temperature used for the volumetric measurement of natural gas ANSI API 2562 1969 has established 60 F as the base temperature to which all volumes are commonly referred In gas measurement volume decreases when there is an increase in pressure Compressibility Z is the variance from the ideal gas law behavior Numerical factor single constant or coming from a mathematical function by which the uncorrected result of a measurement is multiplied to compensate for systematic error Differential Pressure The difference in pressure DP between the inlet and outlet of a metering or Dattus fM Met
52. nformation and instructions to correctly store unpack inspect and install the Dattus fM Meter Also this chapter provides general information and procedures for accessing the various programming modes When installing meters follow any guidelines issued by your company in addition to those given in this guide Handling and Storage Store the meter in a clean dry environment until time of use The meter is shipped with protection caps on the inlet and outlet sides to prevent foreign matter from entering the measurement unit see Figure 3 1 Ensure these caps remain in place until mounting the meter in the system Figure 3 1 Inlet Outlet Protection Caps Unpacking and Inspection The meter is delivered in a well supported cardboard box that normally arrives in perfect condition however if the box is damaged notify the carrier immediately of a potential mishandling problem The meters are packed individually and each contains the following components e Meter with protection caps on the inlet and outlet e Meter seals e Installation instructions e Test certificates Dattus fM Meter Technical Reference Guide 3 1 Installation and Programming Mechanical Mounting A Dattus fM meter can be installed in the metering line without any form of special support It can also be mounted in any orientation however Actaris does not recommend mounting with gas entry from the bottom If liquids are present in the metering line Actari
53. nged from uncorrected volume to temperature corrected volume using PC Link configuraton software Dattus Paramters Outputs Due to the fact that the resolution from the proving pulse is 25 seconds it is recommended that a minimum test time of 120 seconds be used to minimize this quantization error Table 4 2 shows examples of prover test setups using various test flow rates Table 4 2 Recommended Transfer Prover Test Parameters Capacity Test Meter Pulses Test Flow Position of Control Output Test Volume Rates Damper Mode Ball Valve uo zl opto uc 10 100 600 Closed oMor2m om uc 10 100 1000 Closed oMor2m opto uc 10 100 1400 Closed om opto uc 20 200 3000 Closed UC C 1 1 1 2 2 0 0 0 0 200 om opto uc 20 200 5000 Open Dattus fM Meter Technical Reference Guide 4 5 Differential Pressure Testing Chapter 5 Differential Pressure Testing Differential pressure testing is a simple procedure where pressure drop expressed in inches of water column is measured between the inlet of the meter to its outlet This method has long been used to assess changes in accuracy of a rotary meter while in use in the field Excessive dirt build up on the rotary meter s impellers or wear on the bearings will cause an increase in friction resulting in altered accuracy and a high differential pressure Pressure readings are taken across the meter and indicate whether or not the meter has
54. olycarbonate External Cover ASA Acrylonitrile Styrene Acrylate Flow Rates Maximum Flow Rate 9 000 acth 255 m h Comparable Meters 3 000 to 9 000 acfh Minimum Flow Rate 22 ach 625 mit Flow Rate at 0 5 in we gas 0 6 specific gravity 2 ANSI 125 2 457 acfth 69 6 m3 h ss 3 ANSI 125 2 750 acfth 77 9 m3 h Flange Flow Rate ft h Pressure Drop gas 0 6 Version specific gravity in w c Lamm es S O 7968 7000 4918 2 00 3481 1 00 0 75 2457 Dattus fM Meter Technical Reference Guide 1 6 General Information Dynamic 2 400 1 Range oe lemer Temperature Measurement Temperature Probe Type Type PT1000 platinum resistance thermistor RTD Typical Probe Accuracy 0 1 of absolute measurement Probe Construction Stainless steel tube 0 25 in 6 mm outer diameter Probe Cable 0 25 in 6 mm diameter 2 conductors with shield Pulse Type Low frequency standard Namur Temperature Out of range FlowRate Over range Batey Endotife S Oscillation Sensor Oscillation Sensor L Warning Oscillation Seen Goamaion Communication Optical Link Optical port 2400 baud Event Logging Stores 178 events Stores 22 last occurrence events typical operating life of 7 10 years Dattus fM Meter Technical Reference Guide 1 7 General Information Overall Dimensions Figure 1 6 and Table 1 2 show the various outside dimensions and mounting
55. ppears on the meter display If the alarm indicator appears refer to Chapter 8 Alarms and Chapter 9 Troubleshooting for details on identifying and correcting problems indicated by alarm messages Place the new temperature probe as deeply as possible into the thermal well and tighten its fastening nut Close and fasten the index housing Re seal the index housing if required Re attach the external cover Dattus fM Meter Technical Reference Guide 7 13 Alarms Chapter 8 Alarms This chapter of the Dattus fM Meter Technical Reference Guide provides details on the possible alarms generated by the meter Alarm Operation As a result of detecting an alarm condition the Dattus fM meter display shows an alarm symbol see Figure 8 1 that remains active until the alarm is no longer valid The nature of the alarm can be further defined by viewing alarm codes on the display Figure 8 1 represents a sample display where the left hand side shows the code number of the current alarm and the right hand side the stored code number Stored numbers represent all alarm events that have occurred since the last time alarm memory was reset Current Stored Figure 8 1 Displayed Alarm Codes If the user prefers the alarm symbol and code not appear on the display it may be turned off for individual events using PC Link confguration software under Dattus Parameters Alarms The Dattus meter records all alarm code occurrences in an ev
56. puts Communication with an external device by way of the optical port Acquisition of the data for the temperature probe Correction of the volume to reference conditions BATTERY COMPARTMENT METER INTERFACE Serial Communicatons Flag Protocol Optical Interface RS 232 Interface b ay Pulse Output RS 232 Figure 2 3 Meter Block Diagram Uncorrected Volume Accumulation The volume of gas at metering pressure and temperature is totaled by the microprocessor This is the primary function of the meter and has priority over all other tasks performed by the meter The accumulated volume is stored in the non volatile memory every six hours midnight 6 A M noon 6 P M If there is a loss of power to the meter the value will be recalled from the memory This accumulated volume register cannot be reset or programmed to a different value Dattus fM Meter Technical Reference Guide 2 3 Theory of Operation Corrected Volume Accumulation The corrected volume accumulation is calculated from the uncorrected volume passed in the previous 20 second interval The uncorrected volume is multiplied by the correction factors for pressure and temperature which are calculated at the beginning of each interval Under alarm conditions this register is not incremented This register value is stored every six hours in non volatile memory and can be set to any initial value with the proper programming access Fixed Pressure
57. r Technical Reference Guide 6 1 o Oo N O oO 12 13 14 Temperature Calibration Figure 6 2 Reference Temperature Source Attach the optical probe to both the computer and the meter Run the PC Link configuration software and select Communications Logon Once communications are established with the meter select T Calibration Type the reference pressure temperature in the appropriate window on the screen Click Acquire to read the meter temperature If a multiple point calibration is to be performed repeat steps 8 and 9 at additional reference temperature points Click Calculate to determine calibration coefficients To accept these new calibration factors click Program other wise click Cancel Return the temperature probe to the thermal well making sure it is seated as deeply as possible and tighten its fastening nut Re attach the external cover Dattus fM Meter Technical Reference Guide 6 2 Maintenance Chapter 7 Maintenance This chapter of the Dattus fM Meter Technical Reference Guide discusses processes needed to maintain the meter The Dattus fM meter typically requires only minor scheduled maintenance routines such as replacing internal batteries In addition to battery replacement procedures this chapter also provides information and instructions for replacing the index and replacing the temperature probe should it become necessary The Dattus fM meter contains several tamper seals to protect the
58. re 4 1 Dampener Figure 4 1 Actaris Dampener and Choke Valve Dattus fM Meter Technical Reference Guide 4 1 Proving To simulate actual conditions when testing the Dattus with a 2 flange attach a 2 pipe flange combination to the meter s inlet Follow Figure 4 2 to properly connect the meter 25 ft hose choke valve dampener 3 ft hose and transfer prover Choke valve 3 ft hose ae Prover Figure 4 2 Damper Connection Schematic The addition of the Choke Valve provides additional pulsation dampening at lower flow rates For best performance of the dampener the Choke Valve should be in the closed position for calibration below 3000 acfh Table 4 1 Conditions to use the Damper amp Position of Ball Valve Flow Rates Transfer Prover Position of Ball Valve Reference Meter 33 000 CFH 3 000 CFH 500 CFH 2 000 CFH 300 CFH Connecting the Pressure Temperature and Flow Hoses The Dattus meter has three pressure taps on each side of the meter that may be used for testing 1 Choosing either side of the meter locate the center pressure tap and the one closest to the inlet of the meter as indicated in Figure 4 3 Dattus fM Meter Technical Reference Guide 4 2 Proving Reference Pressure Tap Inlet Tap Figure 4 3 Pressure Taps 2 Unscrew and remove the two corresponding plugs with a 1 4 inch 6 mm allen wrench and place the plugs aside for future reuse 3 Install
59. s Locations The design of the Dattus Gas Meter conforms to the UL CSA ratings of Class 1 Div 1 group C amp D and Class 1 Div 2 hazardous locations The meter is approved to the CENELEC standards for rating of an IIB T4 The intrinsic safety includes design constraints on the batteries electronics board outputs and external plastic surfaces Contact Information Technical Assistance Actaris Metering Systems 970 Highway 127 North Owenton Kentucky 40359 9302 Tel 502 484 5747 Fax 502 484 6223 Toll Free 1 800 490 0657 Dattus fM Meter Technical Reference Guide iii Table of Contents Contents Preface Regulatory e de xili Intrinsic Safety for Hazardous Locations xiii Contact Information Technical ASSISt AN CC EE xiii 1 General Information Using This MANIA E 1 2 General DBS EE 1 2 Meter ele E 1 3 Standard E 1 3 Optional SNE OS Ee EE 1 3 leet 1 3 Me as rement CUM ics ee el EE Ee 1 3 Mdex TGS acca secs settee ads had onda eae cuales heen aoe ated atte 1 4 External COVO acca cede at Geier cane aa E a sex bei ORAE Eea ec E E 1 5 DEL 1 5 e 1 6 EES 1 8 Liquid Crystal Ee ener veer ge err inrere enter ce tse snr ret ene errno eres 1 8 Power HEED 1 11 P tten Gite gedeelt 1 11 Pulse Outputs of the Uncorrected Volume 1 11 Pulse Outputs of the Corrected Volume 1 12 Alarm COMO E 1 12 Event i ssh aire ces rata eaten a edie aad 1 12 Meter Badges and Labels saciid cies oh cticecen de heocestlacsctedistacelalhcase
60. s recommends mounting the meter in a horizontal position and or the use of a filter designed to remove liquids from the metering line Gas Micro EVC equipped meters have vented instrument enclosures Always ensure that the index is oriented so that the vent is pointing towards the ground If the flow direction is specified at the time of order the meter index will be oriented to facilitate the reading of the display If no direction is specified the default of entry from the left is taken Four meter index orientations are possible see Figure 3 2 To change the index orientation the external cover must be removed the index housing carefully rotated and the external cover replaced Gas Entry Bottom Figure 3 2 Four Possible Index Mounting Orientations Start up Shut down Procedures Meter start up and shut down procedures depend on the type of installation Installation procedures with and without a by pass are described in this section Always open and close valves slowly preventing pressure surges that may damage equipment Dattus fM Meter Technical Reference Guide 3 2 Installation and Programming Installation with a By Pass Figure 3 3 shows meter installation with a by pass Figure 3 3 Installation with a By Pass To Shut Down the Meter 4 Slowly open the by pass valve V4 2 Close the inlet valve V1 of the metering line 3 Close the outlet valve V2 4 Depressurize the metering line not
61. uide 7 9 Maintenance Temperature Probe Replacement Very few events ever occur that require replacing a temperature probe However probe failure as indicated by persistent and unresolved alarm indications may require a replacement Should either of thisoccur and replacement be necessary refer to the following procedure To replace the temperature probe you will need the following materials Materials List e Small flat blade screwdriver e 5 8 inch 15 mm open end wrench e 19 32 inch 15 mm wrench 2 e Computer with PC Link configuration software installed 1 Remove the external cover by loosening and removing two external cover mounting screws For additional details on removing the cover refer to Chapter 3 Installation and Programming 2 Lift the cover away from the measuring unit and locate the temperature probe assembly Do not loosen the resident portion of the probe cable gland that is mounted to the base of the meter Use an additional 5 8 inch 15 mm open end wrench to hold the base nut in place while loosening the cable gland cap nut 3 Loosen the temperature probe cable gland cap nut on the outside of the index housing see Figure 7 15 using a 5 8 inch 15 mm open end wrench W Cable Gland f w w Figure 7 15 Temperature Probe Cable Gland Dattus fM Meter Technical Reference Guide 7 10 Maintenance 4 Open the index housing by loosening and removing its nine 9 slotted screws see Figure 7 1
62. unit against unauthorized access to its internal components Make sure you have replacement seals readily available prior to performing the reassembly procedures described in this chapter For seal ordering information contact your Actaris Sales Representative Battery Replacement When the battery alarm triggers see Chapter 8 Alarms replace the batteries as soon as possible Two 3 6V lithium D Cell batteries power the meter and are contained in a separate battery compartment inside the index housing see Figure 7 1 To access the battery compartment the external cover must first be removed The batteries run in parallel so that one old battery can be removed and a new battery installed before the second old battery is removed This configuration maintains full meter functionality during the battery change The meter is also equipped with a back up battery It has a 3 month life The back up battery will prevent loss of power in the event both batteries are disconnected or if batteries have not been replaced promptly after appearance of a battery alarm To ensure the intrinsic safety of the device use only batteries recommended by Actaris When replacing old batteries verify the type rating and date code of the new batteries Check the manufacture date to ensure that batteries are not older than twelve 12 months Replacing the Batteries 1 Remove the external cover by loosening and removing two external cover mounting s

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