Ametek ASR900, Руководство по установке и обслуживанию

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Installation and Start-Up
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3-9
Retrofitting the HAG Sample Probe
This section describes replacing an existing Sample Valve with a HAG
Sample Probe. Refer to the drawings shipped with the Sample Probe.
To replace an existing Sample Valve with the HAG Sample Probe:
1. Prepare the probe end of the Sample Probe for installation by ensur-
ing the probe is the proper length for the process duct being sampled
from. If necessary, cut the probe end so that it extends 30–50 % into
the process duct. Apply Teflon tape or a liquid thread sealant (must
comply with company/hazardous location policy) to the probe pipe
threads and thread it into the bottom of the Pipe Adapter.
2. While working from the System 200 Configurator Software, view and
record the analyzer’s current Flow Control Mode.
3. Manually Zero the sample system for 2–3 minutes to remove all
residual gas in the sample system. Information on how to do this is
described in the analyzer manual.
4. After the Zero is complete, isolate the analyzer sample system from
the process duct by closing the isolation valve on the existing Sample
valve.
5. Power down the analyzer and its temperature zone circuitry. Refer to
the analyzer manual for safe power down instructions.
Hazardous Locations
Before proceeding, test the area around the analyzer for flammable
gases and proceed only when the area is safe.
Do not remove the cover of the Explosion-Proof Digital
Communications Port on the front of the Lower Enclosure (
Model 931
or Model 932 Analyzers ) and do not power up/down the analyzer or
computer if there is an explosive gas atmosphere present.
6. Remove the Sample Line from the existing Sample Valve.
Potentially lethal concentrations of H
2
S and/or other toxic gases are
present in the process. Before proceeding, follow all necessary safety
precautions, such as wearing a supply air apparatus.

Setup (tab)

Gas
Calibration

<<Flow
Control>>
!
WARNING
!
WARNING

See Fuse Legend
inside analyzer’s Lower
Enclosure.