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ACM 150
Optional capabilities
The following options can be included with or added to any ACM 150.
Sample points
The ACM 150 monitor can be purchased with 10, 20, 30, or 40 sample points. There
is a maximum of 40 sample points.
Automatic line leak test
Sample tube integrity must be confirmed whenever a new tube is installed. A leak
test can be done using compressed air. Honeywell Analytics recommends using a
test gas to confirm that the tube is connected to the correct port and that it is not
diluted by outside air leaking in. After tubes are installed and tested, it is still possible
to develop a leak in one of the sample tubes connecting the ACM 150 monitor to a
sample point. Tube leaks can develop for various reasons, such as:
•
disconnected at the sample point or at the monitor and not reconnected
•
disconnected and reconnected but not properly seated or tightened
•
accidentally cut by a contractor working in the facility
The automatic Line Leak Test is built into all ACM 150s, however, it may be turned on
or off in the configuration by Honeywell Analytics. For every sample line in use, the
test requires a check valve installed near the sample tube inlets, which is shown in the
flow schematic that's available on request. The check valve passes flow in one
direction only. It stops the flow of CDA coming from the ACM 150 monitor during the
line leak test. This allows the entire sample tube to be pressurized. To eliminate
particulates, an in-line filter is installed between the check valve and the inlet of each
sample tube.
These check valves are available from Honeywell Analytics. They are SS check
valves with 3/8 inch tube fittings and a cracking pressure of 1/3 psi.
If employed, automatic line leak is activated once a day at any time. CDA is directed
down each sample tube, one at a time. If the tube holds pressure, it passes the test.
If a tube fails to hold pressure, it fails the test and the ACM 150 monitor displays a
malfunction message on the touchscreen.
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