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Instromet

RABO

®

Rotary Gas Meter

Instruction Manual

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Summary of Contents for RABO

Page 1: ...Instromet RABO Rotary Gas Meter Instruction Manual ...

Page 2: ......

Page 3: ...15 Troubleshooting 11 RABO Rotary Gas Meter RABO Rotary Gas Meter 02 Elster Instromet RABO Rotary Gas Meter 1 General Information 3 2 Intended Use and Application 3 3 Operating Principle 3 4 Receiving Handling and Storage 4 5 Installation 4 6 Start up Commissioning 6 7 Decommissioning and Removal 6 8 Inspection and Maintenance 6 9 Testing 6 10 Technical Data 8 11 Index 9 12 Pulser 11 13 Thermowell...

Page 4: ... transit you should notify the shipper immediately ﬁle a claim with the carrier and notify your Elster supplier Damage to internal components may occur without visible external damage All new meters should be inspected and checked for free rotation of the impellers by lightly blowing into the inlet of the meter This slight air pressure should cause the impellers to rotate freely and come to a stop...

Page 5: ...ex end of the meter 1 Ensure gas valves are closed and meter and piping are depressurized WARNING Failure to depressurize the meter prior to removing meter and or components could result in personal injury and or property damage 2 Remove oil ﬁll plug in the counter end case cover using a 5mm hex key Figures 5 and 6 3 Using the supplied syringe and oil slowly add oil until it is 1 16 of the center ...

Page 6: ...or 1 to 2 minutes to verify proper operation If the index does not start registration or if you hear knocking or scraping sounds coming from the meter stop the ﬂow and follow appropriate decommissioning procedures before removing the meter from the line g If operation is satisfactory gradually open the meter s outlet valve to the full open position h Slowly close the bypass valve i Check the meter...

Page 7: ... never left in a plug for a period of hours or days Severe deformation of the valves may occur if the probe is left in the plug for a long period of time b Differential Pressure Testing Typically when proving a meter both the meter pressure and meter differential pressure are used and recorded The RABO meter differential pressure ports are not full bore and most temperature probes will not fit thr...

Page 8: ...0 40 50 60 75 100 150 175 250 290 0 0 0 1 0 3 0 7 1 4 2 1 2 8 3 4 4 1 5 2 6 9 10 3 12 1 17 2 20 0 100 110 130 160 230 300 370 430 500 600 770 1 110 1 270 1 780 2 050 3 500 3 900 4 600 5 800 8 200 10 500 12 900 15 300 17 700 21 200 27 200 39 100 45 000 62 800 72 300 5 500 6 100 7 200 9 100 12 800 16 600 20 300 24 000 27 800 33 400 42 700 61 400 70 700 98 700 113 700 160 170 200 260 360 470 570 680 ...

Page 9: ... factor shown on the index face plate In the example on the next page the reading would be 1357900 cubic feet Figure 10 RABO Rotary Gas Meter 08 Elster Instromet c Dimensions and Weights b How to Read 11 Index ANSI Class 125 150 flat face flange connection A B C D E F G Nom Pipe Size Bolt Size H Bolts Flange Bolt Circle J Shipping Weight Carton Size in mm in mm in mm in mm in mm in mm in mm in mm ...

Page 10: ...e change gear from the damaged index to the replacement Figures 14 and 15 Remove the change gear on the damaged index Pry the locking collar off with a knife blade or other sharp object Unscrew the change gear WARNING Each meter size uses a common index that has unique colored gears Interchanging colored gears will result in inaccurate readings Ensure the replacement index has the same color gears...

Page 11: ... index cover 11 Install security seals LOCKING COLLAR CHANGE GEAR INDEX Meter Gear Color 3 5M G65 White 5 5M G100 Dark Green 9M G160 Green 14M G250 Red Table 1 LOCKING COLLAR CHANGE GEAR SUPPORT HOLE SUPPORT HOLE Figure 14 Change gear removal 12 Pulser All RABO meter indexes can be easily outﬁtted with a pulse output device to interface with auxiliary equipment Installation of a pulser is quick an...

Page 12: ... Screw the thermowell into the meter and tighten to 18 ft lbs 8 Re pressurize the meter as instructed in Start up Commissioning see section 6 Figure 21 Auxilary equipment mounted ACCESSORY Figure 18 Auxiliary ports 13 Thermowell All RABO meters come equipped with two 2 NPT auxiliary ports on the meter body Figure 18 which can be used for sensing pressure and temperature of the flowing gas A thermo...

Page 13: ...he posts in the index base plate 2 Ensure the shaft on the magnet holder aligns with the support hole on the index frame Figure 24 Figure 24 ID retaining screws INDEX RETAINING SCREW SUPPORT HOLE ON BACK SIDE INDEX RETAINING SCREW INDEX RETAINING SCREW 3 Tighten the three screws until snug Do not overtighten a Each screw should have a 2mm thick retaining washer to space the ID gearing and index as...

Page 14: ...ent should be pipe or wall mounted adjacent to the meter Elster provides customized brackets for commonly used equipment Figure 32 Please contact your local Elster representative for details Figure 26 Support bracket attachment 3 5M 5 5M Horizontal Flow 3 5M 5 5M Vertical Flow 2 Using a 5mm Allen wrench loosely install two M6 socket head cap screws through the support bracket into the meter case c...

Page 15: ...ng Impellers out of time Retime impellers Impellers contacting body Rotate manually to verify impellers spin freely Low registration Upstream or bypass leak Check all valves for leakage Non registration Broken or binding index odometer Replace odometer Obstruction in meter Remove meter remove obstructions ﬂush meter 15 Troubleshooting probe and leading threads to ensure no pipe dope enters the met...

Page 16: ...ms and solutions for the safe control and delivery of natural gas across the globe Trusted Brands Elster American Meter Company LLC Elster Perfection Corporation Elster Instromet Elster Canadian Meter Company LLC Elster Gas Depot Elster Meter Services Elster American Meter Company LLC 2221 Industrial Road Nebraska City NE 68410 USA T 1 402 873 8200 F 1 402 873 7616 www elster com gas 2014 by Elste...

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