Honeywell RABO G65 Instruction Manual page 13

®
ELSTER RABO Rotary Gas Meter
Figure 10. Index
c) How to "Clock" a Meter
The odometer index can be used to calculate the
instantaneous flow rate by using the right-most digit (test
dial). Each number on this dial represents one (1) cubic
foot, and one complete revolution of this dial represents
ten (10) cubic feet. You will need a stop watch or a watch
with a sweep second hand to calculate flow rate.
1. Measure the time, in seconds, that it takes the test
dial to make one complete revolution (10 cubic feet).
2. Use the following formula to calculate flow
rate: Flow Rate (acfh) = (10 ÷ "time") x 3600
Note that the odometer index does not compensate
for elevated pressure or temperature. Correction
factors will need to be applied to adjust the flow rate
to standard conditions (scfh).
d) Removal, Installation and Replacement
Steps to replace the RABO meter index:
1. Cut the seal wires and remove from the holes [Figure 11].
2. Remove (unscrew) the two brass screws on the
sides of the index cover [Figure 11].
SEALS
Figure 11. Index cover seals
13 Honeywell
3. Pull off the index cover.
• It helps to rock it slightly.
• Be careful not to damage the masking plate
and index when removing the cover.
4. Carefully pull off the index masking plate [Figure 12].
Remove the three index retaining screws using a T20
5.
driver [Figure 13]
SUPPORT
HOLE
INDEX
RETAINING
SCREW
Figure 13. Index retaining screws
6. Carefully remove the index
• Pay attention to the driven magnet — it is
supported by the index.
• Leave the magnet on the meter.
7. Transfer the 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.
!
Each meter size uses a common index that
has unique colored gears. Interchanging
colored gears will
readings. Ensure the replacement index has
the same color gears. [Refer to Table 1]
• If the replacement index has a change gear,
remove and discard it.
• Attach the change gear from the damaged index
to the same shaft on the replacement index.
• Secure gear on shaft.
• Snap on the locking collar.
Figure 12. Index masking plate
WARNING
result in
INDEX
RETAINING
SCREW
INDEX
RETAINING
SCREW
inaccurate