Honeywell RABO Instruction Manual page 10

RABO ® Rotary Gas Meter
ELSTER RABO RABO RABO RABO ® ® ® Rotary Gas Meter Rotary Gas Meter Rotary Gas Meter Rotary Gas Meter
®
Figure 10. Index
Figure 10. Index Figure 10. Index Figure 10. Index Figure 10. Index
c) How to "Clock" a Meter
c) c) c) c) How to "Clock" a Meter How to "Clock" a Meter How to "Clock" a Meter How to "Clock" a Meter
The odometer index can be used to calculate the instantaneous
The odometer index can be used to calculate the instantaneous The odometer index can be used to calculate the instantaneous The odometer index can be used to calculate the instantaneous The odometer index can be used to calculate the instantaneous
flow rate by using the right-most digit (test dial). Each number
flow rate by using the right-most digit (test dial). Each number flow rate by using the right-most digit (test dial). Each number flow rate by using the right-most digit (test dial). Each number flow rate by using the right-most digit (test dial). Each number
on this dial represents one (1) cubic foot, and one complete
on this dial represents one (1) cubic foot, and one complete on this dial represents one (1) cubic foot, and one complete on this dial represents one (1) cubic foot, and one complete on this dial represents one (1) cubic foot, and one complete
revolution of this dial represents ten (10) cubic feet. You will
revolution of this dial represents ten (10) cubic feet. You will revolution of this dial represents ten (10) cubic feet. You will revolution of this dial represents ten (10) cubic feet. You will revolution of this dial represents ten (10) cubic feet. You will
need a stop watch or a watch with a sweep second hand to
need a stop watch or a watch with a sweep second hand to need a stop watch or a watch with a sweep second hand to need a stop watch or a watch with a sweep second hand to need a stop watch or a watch with a sweep second hand to
calculate flow rate.
calculate flow rate. calculate flow rate. calculate flow rate. calculate flow rate.
1. Measure the time, in seconds, that it takes the test dial to
1. 1. 1. 1. Measure the time, in seconds, that it takes the test dial to Measure the time, in seconds, that it takes the test dial to Measure the time, in seconds, that it takes the test dial to Measure the time, in seconds, that it takes the test dial to
make one complete revolution (10 cubic feet).
make one complete revolution (10 cubic feet). make one complete revolution (10 cubic feet). make one complete revolution (10 cubic feet). make one complete revolution (10 cubic feet).
2. Use the following formula to calculate flow rate:
2. 2. 2. 2. Use the following formula to calculate flow rate: Use the following formula to calculate flow rate: Use the following formula to calculate flow rate: Use the following formula to calculate flow rate:
Flow Rate (acfh) = (10 ÷ "time") x 3600
Flow Rate (acfh) = (10 ÷ "time") x 3600 Flow Rate (acfh) = (10 ÷ "time") x 3600 Flow Rate (acfh) = (10 ÷ "time") x 3600 Flow Rate (acfh) = (10 ÷ "time") x 3600
Note that the odometer index does not compensate for
Note that the odometer index does not compensate for
Note that the odometer index does not compensate for Note that the odometer index does not compensate for Note that the odometer index does not compensate for
elevated pressure or temperature. Correction factors will
elevated pressure or temperature. Correction factors will
elevated pressure or temperature. Correction factors will elevated pressure or temperature. Correction factors will elevated pressure or temperature. Correction factors will
need to be applied to adjust the flow rate to standard
need to be applied to adjust the flow rate to standard
need to be applied to adjust the flow rate to standard need to be applied to adjust the flow rate to standard need to be applied to adjust the flow rate to standard
conditions (scfh).
conditions (scfh).
conditions (scfh). conditions (scfh). conditions (scfh).
d) Removal, Installation and Replacement
d) Removal, Installation and Replacement
d) Removal, Installation and Replacement d) Removal, Installation and Replacement d) Removal, Installation and Replacement
Steps to replace the RABO meter index:
Steps to replace the RABO meter index: Steps to replace the RABO meter index: Steps to replace the RABO meter index: Steps to replace the RABO meter index:
1. Cut the seal wires and remove from the holes [Figure 11].
1. 1. 1. 1. Cut the seal wires and remove from the holes [Figure 11]. Cut the seal wires and remove from the holes [Figure 11]. Cut the seal wires and remove from the holes [Figure 11]. Cut the seal wires and remove from the holes [Figure 11].
2. Remove (unscrew) the two brass screws on the sides of
2. 2. 2. 2. Remove (unscrew) the two brass screws on the sides of Remove (unscrew) the two brass screws on the sides of Remove (unscrew) the two brass screws on the sides of Remove (unscrew) the two brass screws on the sides of
the index cover [Figure 11].
the index cover [Figure 11]. the index cover [Figure 11]. the index cover [Figure 11]. the index cover [Figure 11].
SEALS
SEALS SEALS SEALS
Figure 11. Index cover seals
Figure 11. Index cover seals Figure 11. Index cover seals Figure 11. Index cover seals Figure 11. Index cover seals
09 Elster Instromet
09 Elster Instromet 09 Elster Instromet 09 Elster Instromet 10 Honeywell
3. Pull off the index cover.
3. 3. 3. 3. Pull off the index cover. Pull off the index cover. Pull off the index cover. Pull off the index cover.
• It helps to rock it slightly.
• It helps to rock it slightly. • It helps to rock it slightly. • It helps to rock it slightly. • It helps to rock it slightly.
• Be careful not to damage the masking plate and
• Be careful not to damage the masking plate and • Be careful not to damage the masking plate and • Be careful not to damage the masking plate and
• Be careful not to damage the masking plate and
index when removing the cover.
index when removing the cover. index when removing the cover. index when removing the cover.
index when removing the cover.
4. Carefully pull off the index masking plate [Figure 12].
4. 4. 4. Carefully pull off the index masking plate [Figure 12]. Carefully pull off the index masking plate [Figure 12]. Carefully pull off the index masking plate [Figure 12].
4. Carefully pull off the index masking plate [Figure 12].
RABO Rotary Gas Meter
®
b) Mounting
1) Always follow your company's procedures, and
applicable local codes and ordinances.
2) Ensure gas valves are closed.
3) Ensure the upstream piping is clean and free of any
Figure 12. Index masking plate
Figure 12. Index masking plate Figure 12. Index masking plate Figure 12. Index masking plate Figure 12. Index masking plate
debris.
4) Remove protective caps from meter inlet and outlet prior
to installation.
5. Remove the three index retaining screws using a Torx
5. 5. 5. 5. Remove the three index retaining screws using a Torx Remove the three index retaining screws using a Torx Remove the three index retaining screws using a Torx Remove the three index retaining screws using a Torx
5) Ensure the impellers turn freely.
T20 driver [Figure 13].
T20 driver [Figure 13]. T20 driver [Figure 13]. T20 driver [Figure 13]. T20 driver [Figure 13].
6) Ensure the direction of flow using the arrow on the
nameplate.
7) Ensure the meter orientation is correct. Impeller shafts
SUPPORT
SUPPORT SUPPORT SUPPORT
must be horizontal [Figure 4].
HOLE
HOLE HOLE HOLE
INDEX
INDEX INDEX INDEX
RETAINING
RETAINING RETAINING RETAINING
SCREW
SCREW SCREW SCREW
Figure 13. Index retaining screws
Figure 13. Index retaining screws Figure 13. Index retaining screws Figure 13. Index retaining screws Figure 13. Index retaining screws
Figure 4. Side view
6. Carefully remove the index.
6. Carefully remove the index.
6. 6. 6. Carefully remove the index. Carefully remove the index. Carefully remove the index.
• Pay attention to the driven magnet — it is supported
• Pay attention to the driven magnet — it is supported
• Pay attention to the driven magnet — it is supported • Pay attention to the driven magnet — it is supported • Pay attention to the driven magnet — it is supported 8) Connect the inlet and outlet pipe flanges using
by the index.
by the index.
by the index. by the index. by the index. appropriate bolts and gaskets. Inlet and outlet pipe
• Leave the magnet on the meter.
• Leave the magnet on the meter.
• Leave the magnet on the meter. • Leave the magnet on the meter. • Leave the magnet on the meter. flanges should be parallel and should not introduce any
7. Transfer the change gear from the damaged index to the
7. Transfer the change gear from the damaged index to the
7. 7. 7. Transfer the change gear from the damaged index to the Transfer the change gear from the damaged index to the Transfer the change gear from the damaged index to the bind on the meter body when tightened.
replacement [Figures 14 and 15].
replacement [Figures 14 and 15].
replacement [Figures 14 and 15]. replacement [Figures 14 and 15]. replacement [Figures 14 and 15]. 9) Level meter to within 1/16" per foot in all directions and
• Remove the change gear on the damaged index.
• Remove the change gear on the damaged index.
• Remove the change gear on the damaged index. • Remove the change gear on the damaged index. • Remove the change gear on the damaged index. tighten flange bolts evenly (maximum 80ft-lbs).
• Pry the locking collar off with a knife blade or other
• Pry the locking collar off with a knife blade or other
• Pry the locking collar off with a knife blade or other • Pry the locking collar off with a knife blade or other • Pry the locking collar off with a knife blade or other
sharp object.
sharp object.
c) Adding Oil
sharp object. sharp object. sharp object.
• Unscrew the change gear.
• Unscrew the change gear.
• Unscrew the change gear. • Unscrew the change gear. • Unscrew the change gear.
!
!
! ! !
Add oil only to the index end of the meter.
Each meter size uses a common index that has
Each meter size uses a common index that has
Each meter size uses a common index that has Each meter size uses a common index that has Each meter size uses a common index that has
unique colored gears. Interchanging colored
unique colored gears. Interchanging colored
unique colored gears. Interchanging colored unique colored gears. Interchanging colored unique colored gears. Interchanging colored
1) Ensure gas valves are closed and meter and piping are
gears will result in inaccurate readings. Ensure
gears will result in inaccurate readings. Ensure
gears will result in inaccurate readings. Ensure gears will result in inaccurate readings. Ensure gears will result in inaccurate readings. Ensure
depressurized.
the replacement index has the same color gears.
the replacement index has the same color gears.
the replacement index has the same color gears. the replacement index has the same color gears. the replacement index has the same color gears.
[Refer to Table 1]
[Refer to Table 1]
[Refer to Table 1] [Refer to Table 1] [Refer to Table 1]
!
• If the replacement index has a change gear, remove
• If the replacement index has a change gear, remove
• If the replacement index has a change gear, remove • If the replacement index has a change gear, remove • If the replacement index has a change gear, remove
and discard it.
and discard it.
Failure to depressurize the meter prior to removing
and discard it. and discard it. and discard it.
• Attach the change gear from the damaged index to
• Attach the change gear from the damaged index to
meter and/or components could result in personal
• Attach the change gear from the damaged index to • Attach the change gear from the damaged index to • Attach the change gear from the damaged index to
the same shaft on the replacement index.
the same shaft on the replacement index.
injury and/or property damage.
the same shaft on the replacement index. the same shaft on the replacement index. the same shaft on the replacement index.
• Secure gear on shaft.
• Secure gear on shaft.
• Secure gear on shaft. • Secure gear on shaft. • Secure gear on shaft.
• Snap on the locking collar.
2) Remove oil fill plug in the counter end case cover using a
• Snap on the locking collar.
• Snap on the locking collar. • Snap on the locking collar. • Snap on the locking collar.
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 of the sight glass [Figure 7].
WARNING
WARNING
WARNING WARNING WARNING
WARNING
04 Elster Instromet
INDEX
INDEX INDEX INDEX
RETAINING
RETAINING RETAINING RETAINING
SCREW
SCREW SCREW SCREW
INDEX
INDEX INDEX INDEX
RETAINING
RETAINING RETAINING RETAINING
SCREW
SCREW SCREW SCREW