Sample System Enclosure Purge; Optional); Repair Verification; Intermittent Operation - Endress+Hauser SpectraSensors J22 TDLAS Operating Instructions Manual

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Intermittent
Operation
134
2. Open the tee-fitting cap on the exhaust port on the lower right side of the
enclosure and insert a sensor to determine if there is H
sure.
3. If no hazardous gas is detected, proceed with opening the enclosure door.
4. If hazardous gas is detected, follow the instructions below for purging the
enclosure.
If no appropriate gas sensor is available:
1. Turn off the sample gas to the system.
2. Connect the purge gas to the purge inlet on the upper right side of the enclo-
sure.
3. Open the exhaust on the bottom right side of the enclosure and connect a
piece of tubing that vents to safe area.
4. Input the purge gas at 2 liters per minute.
5. Operate the purge for 22 minutes.
Sample system enclosure purge (optional)
1. Shut off gas to the analyzer.
2. Purge the sample conditioning system before performing a validation or
beginning operation after an upset.
3. Set the flow rate to 1 liter per minute and run the purge for at least 4 minutes
for safety, and until the moisture reading is below an acceptable error level.

Repair verification

When repairs have been completed correctly, alarms will clear from the system.
If the analyzer is to be stored or shut down for a short time period, follow the
instructions for isolating the measurement cell and sample conditioning system
(SCS).
1. Shut off the process gas flow.
2. Allow all residual gas to dissipate from the lines.
3. Connect a nitrogen (N
ply pressure, to the sample supply port.
4. Confirm that any valves controlling the sample flow effluent to the low pres-
sure flare or atmospheric vent are open.
5. Turn on the purge supply to purge the system and clear any residual process
gases.
6. Turn off the purge supply.
7. Allow all residual gas to dissipate from the lines.
8. Close any valves controlling the sample flow effluent to the low pressure flare
or atmospheric vent.
9. Disconnect power to the system.
Confirm the power source is disconnected at the switch or circuit breaker. Make
sure the switch or breaker is in the "OFF" position and locked with a padlock.
10. Confirm all digital/analog signals are turned off at the location from which
they are being monitored.
11. Disconnect the phase and neutral wires from the analyzer.
12. Disconnect the protective ground wire from the analyzer system.
13. Disconnect all tubing and signal connections.
14. Cap all inlets and outlets to prevent foreign material such as dust or water
from entering the system).
) purge supply, regulated to the specified sample sup-
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J22 TDLAS Gas Analyzer
S inside the enclo-
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SpectraSensors, Inc.