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5 TROUBLESHOOTING CHART
Since the operating performance of the meter assembly can be effected by the vacuum regulator and
ejector, also refer to the Troubleshooting Chart in bulletin 100.6701 and 122.6060.
TROUBLE
PROBABLE CAUSE CORRECTIVE ACTION
1. The required gas feed rate
is not achieved at start-up.
a. Insufficient ejector vacuum due to
insufficient water supply pressure
for existing back pressure
conditions.
b. Leakage at vacuum line
connections, vacuum regulator
and/or inlet to ejector.
c. Vacuum line(s) crimped.
d. Length of vacuum line(s) exceeds
maximum allowable transport
distance.
a. Refer to Trouble 2.
b. Inspect each connection and
remake as necessary.
c. Replace vacuum tubing and
arrange line(s) to eliminate
d. Refer to Bulletin 121.3003.
2. Flowmeter ball bounces and/
or maximum gas feed rate
cannot be achieved during
normal operation.
a. Vacuum regulator inlet filter screen
dirty.
b. Rate valve dirty.
c. Flowmeter dirty.
d. Ejector water supply pressure
fluctuating causing insufficient
ejector vacuum. (Ball bouncing
only)
a. Replace gas inlet filter.
b. Clean the rate valve. See Service
section.
c. Clean the flowmeter. See Service
section.
d. Check water supply pressure.
Correct as necessary
3. Flooded metering tube. a. Dirt on the ejector check valve seat,
or worn seat
a. Clean or replace ejector check
valve seat. Refer to Ejector
instruction manual 122.6006,
122.6010, 122.6015, or 122.6060.
4. Vacuum leaks a. Rate valve o-rings worn.
b. Tubing connector loose.
c. Cracks in tubing
a. Replace o-ring.
b. Tighten tubing connector.
c. Replace tubing.
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