Maintenance and Troubleshooting
Hardware Installation and Maintenance Manual B
–21
SCSstatuscheck
These steps should be performed only if there is a suspected problem with the
analyzer.
1. Open the SCS door.
2. Read and record the flow meter settings while the gas is flowing.
3. Close the SCS door.
4. Compare the current readings with the past readings to determine
any variations. Reading levels should remain consistent.
5. If reading levels decrease, check the filters.
Tocheckthefilter
1. Shut down the system following the procedure in “To isolate the
SCS for short-term shutdown” on page 4-8.
2. Inspect, repair or replace the filter as required. Refer to "To replace
the filter".
3. Restart the system.
a. Open the low pressure flare or atmospheric vent header shut-
off valve for the effluent from the sample bypass.
b. Open the sample supply shut-off valve to the SCS.
Performing this check will cause reading errors for up to 4 hours
while the enclosure temperature stabilizes.
Do not leave the SCS door open any longer than absolutely
necessary. SpectraSensors recommends no more than 60
seconds.
It is not necessary to turn off system power to perform this
function.
Contact Service for additional information, refer to “Service
Contact” on page B-31.
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