4.5
Leak checking and purging for first calibration
CAUTION
EQUIPMENT DAMAGE
Failure to clean and dry the tubing may compromise the integrity of the analyzer or its
warranty.
Make sure all tubing is clean and dry internally.
Prior to installation, blow the tubing free of internal moisture, dust, or other
contaminants.
Verify that all electrical connections are correct and safe and then turn the gas
chromatograph (GC) on.
4.5.1
Check the gas chromatograph (GC) for leaks
Prerequisites
Leak checking carrier and calibration gas lines requires power and a personal computer
(PC) connected to the GC.
Note
Refer to the analyzer's drawing documentation package that shipped with the GC for leak
checking and identifying vents.
Emerson tested the GC and fittings for leaks at the factory prior to shipment.
Procedure
1. Plug the measure vent (labeled
MV
) vent line if it is open.
Leave the
SV
or sample vent line open or unplugged.
2. Slowly pressurize each line in turn; then block in the line, making sure the pressure
holds.
For example, the carrier gas line should be slowly brought up to 100 psig
(6.89 barg)± two percent with the dual-stage regulator at the carrier gas cylinder,
and the actuation pressure should be 100 psig (6.89 barg) maximum.
3. After two minutes, shut the carrier gas bottle valve and observe the high side
regulator gauge on the carrier gas bottle.
a. The gauge should not bleed down more than 100 psig (6.89 barg) in ten
minutes.
b. If helium is lost at a faster rate, leaks are usually found between the carrier
gas 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. Shut the metering valve below the rotameter on the front of the flow panel.
Reference Manual
Installation and start-up
2-3-9000-744
June 2022
Rosemount 700XA
95
Summary of Contents for Rosemount 700XA
Page 1: ...Reference Manual 2 3 9000 744 Rev L June 2022 Rosemount 700XA Gas Chromatograph ...
Page 6: ...TxD TD or Sout Transmit data or signal out 6 ...
Page 30: ...Overview Reference Manual June 2022 2 3 9000 744 30 Emerson com Rosemount ...
Page 100: ...Installation and start up Reference Manual June 2022 2 3 9000 744 100 Emerson com Rosemount ...
Page 182: ...Operation and maintenance Reference Manual June 2022 2 3 9000 744 182 Emerson com Rosemount ...
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