3-44 | Model 931S / Model 932S UV Analyzers
7. Close the Sample and Vent Shut-Off Ball Valves and allow the sample
system to remain pressurized for 10 minutes. Observe the pressure
gauges during this time. The pressure should remain steady.
Meanwhile, use a suitable leak detection fluid (such as Snoop
®
) on
all fittings except those that are hot, such as those on the heated
Measuring Cell (if used).
Do not use a leak detection fluid on hot fittings. If the analyzer system
is at operating temperature, cool down heated zones before using a
leak detection fluid on the fittings.
8. If leaks are found, shut off the Zero gas flow at the cylinder, bleed
down the sample system from the Vent port of the analyzer (by
removing the cap), check and repair all suspect fittings, and repeat
the procedures of testing/repairing/testing until all leaks have been
eliminated.
Recap the Vent outlet before retesting.
9. After all leaks have been eliminated, close the pressure regulators and
then remove the cap from the Vent line to allow the sample system
pressure to bleed down.
10. Reconnect the Vent line to the Sample Vent outlet on the analyzer
backpan.
Disconnect the Zero gas line from the Sample Inlet and reconnect the
Sample Line to the Sample Inlet.
11. If the analyzer uses measured Pressure Compensations (optional),
return the setting to measured.
12. Change the Flow Control back to ‘0’ (auto). Click OK then Save CFG
to EEPROM to save the changed parameters to EEPROM.
13. Close the Metering Valve and the Sample Flow Pressure Regulator
(regulator closest to the Sample Shut-Off Ball Valve on the Sample
Inlet line).
14. Slowly open the isolation valve on the probe. Open the Vent Shut-Off
Ball Valve and then slowly open the Sample Shut-Off Ball Valves to
allow sample gas into the sample system.
See “Setting the Sample Gas Flow Rate and Sample Response Time”
for details about setting the flow rate.
The procedure is complete and the analyzer is ready to analyze sample
gas.
!
CAUTION
To Next Page
Loading...
Need help?
General
