Tp 4: Carrier Or Makeup Gas Regulator - ABB PGC2000 Operation And Service Manual

It is the customer's responsibility to ensure that the area is safe and and hazard-
free, and will remain so the entire time the analyzer is open. This responsibility
includes ensuring adequate ventilation in analyzer shelter and obtaining proper
work permits, etc.
1. Stop Analysis at the end of the current analysis, and make no sample injections until procedure is
completed.
2. Isolate sample valve from the sample system using sample system isolation valves.
3. Take necessary environmental and personal safety precautions. Slowly disconnect sample inlet
line and outlet lines at the sample valve and relieve sample pressure. Do not disconnect line until
all pressure has relieved. Connect a short piece of stainless steel tubing to the sample valve
outlet to a suitable approved waste collection container.
4. Using stainless steel tubing connect a source of 25 psig nitrogen directly to the sample valve inlet
fitting (bottom). Purge all sample from the sample valve into the waste container via the short
piece of tubing previously connected. When nitrogen purging is complete, (30 seconds), shut off
nitrogen purge gas.
5. Raise the oven temperature to final set-point +20% and hold. Perform Test Procedure 30
(Checking Temperature Table Values), steps 1 to 3, 8 and 9, and observe the oven temperature
(column).
Steps 6 and 7 are optional. The existing column can be removed and another
installed prior to performing step 5.
6. Observe baseline for two times the normal cycle time. If baseline offset is reduced, the sample
valve is most likely leaking.
7. If little or no correction in baseline is seen, replace the column. If no column is available, leave
overnight in this state. If the problem is due to column flooding, great improvement or elimination
of offset should be apparent the next morning. If the column was flooded, repair the sample valve
prior to applying sample to the sample valve or making an injection.

TP 4: CARRIER OR MAKEUP GAS REGULATOR

When the carrier supply is turned on, if there is no pressure indicated on the
carrier gauge, do not increase carrier flow. Leak check every connection outside
the analyzer on the entire carrier flow path.
Ensure adequate ventilation in analyzer shelter.
1. Stop Analysis at the end of current analysis, and make no sample injection until the procedure is
completed.
2. Ensure carrier or makeup gas is applied to the analyzer by performing Test Procedure 1
(Carrier, Makeup, and Utility Gas Supplies).
3. No carrier or makeup gas pressure is indicated on analyzer gauges (regulator failed closed),
large leak from regulator inlet to supply, gauge has failed, or tubing is restricted or plugged.
7-2
CAUTION
NOTE
CAUTION
2000-OSM, F1