Table of Contents
Advertisement
SEP 2005
3.5
ANALYZER LEAK CHECKS AND PURGING FOR FIRST CALIBRATION
3.5.1
Analyzer Leak Checks
To perform Analyzer leak checks, follow these steps:
(1)
Plug the Measure Vent (labeled "MV") vent line if it is open. (The "SV", or Sample Vent
line should be left open, or unplugged.)
(2)
Slowly pressurize each line in turn, then block-in the line, making sure the pressure holds.
(a)
For example, the carrier gas line should be slowly brought up to 110 psig (±2
percent) with the dual-stage regulator at the gas cylinder.
(3)
After 2 minutes, shut the carrier gas bottle valve and observe the high-side regulator gauge.
(a)
The gauge should not bleed down more than 100 psig in 10 minutes.
(b)
If helium is lost at a faster rate, leaks are usually found between the helium bottle and
the Analyzer. Check and tighten all connections, as well as the dual-stage regulator.
(4)
When the leak check is complete, reopen the helium bottle valve. Remove the plug from the
MV line.
(5)
Repeat the procedure with sample gas and stream gas after first shutting the metering valve
below the rotameter on the front of the Flow Panel. The metering valve is left shut for now,
but will be reopened later during initial purging and the Analyzer's first calibration.
3-90
Install Analyzer Wiring
4
Install Analyzer Sample & Gas Lines
5
Install GC Controller Wiring
6
Perform Leak Checks
7
MODEL 1000
INSTALLATION AND SETUP
Advertisement
Table of Contents
Troubleshooting
