Endress+Hauser SpectraSensors J22 TDLAS, Руководство по эксплуатации

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Operating Instructions J22 TDLAS Gas Analyzer
110 Hauser
10.3.4 Enclosure purge (optional)
The optional enclosure purge is performed when the sample gas contains high concentrations of H
2
S
.
When maintenance of the J22 TDLAS Gas Analyzer is required, follow one of the two methods described below prior
to opening the enclosure door.
Purging the enclosure with a gas sensor:

Ensure an appropriate sensor is used based on the toxic components in the process gas stream.
1.
Allow the sample gas to continue flowing through the system.
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
2
S inside the enclosure.
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.
Purging the enclosure when no 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 enclosure.
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.
Purging the sample system (optional):
1.
Shut off gas to the analyzer.
2.
Ensure the vent and bypass, if present, are open.
3.
Connect the purge gas to port (12) →  .
4.
Switch the valve (2) from process to purge →  .
5.
Set the flow rate to 1 liter per minute and run the purge for at least 10 minutes for safety.
Repair verification
When repairs have been completed correctly, alarms will clear from the system.
10.4 Intermittent operation
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.
Purge the system as follows:
a. Shut off the process gas flow.
b. Allow all residual gas to dissipate from the lines.
c. Connect a nitrogen (N
2
) purge supply, regulated to the specified sample supply pressure, to the sample supply
port.
d. Confirm that any valves controlling the sample flow effluent to the low pressure flare or atmospheric vent are
open.
e. Turn on the purge supply to purge the system and clear any residual process gases.
f. Turn off the purge supply.
g. Allow all residual gas to dissipate from the lines.
h. Close any valves controlling the sample flow effluent to the low pressure flare or atmospheric vent.
2.
Disconnect power and wiring from the analyzer system:
a. 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.
b. Confirm all digital/analog signals are turned off at the location from which they are being monitored.