Honeywell ACM 150 Manual To Installation, Operation, And Maintenance page 53

ACM 150
its other gas detection products. The list also identifies limitations. Before you can
use the ACM 150 monitor as a monitor, an Honeywell Analytics applications chemist
must provide the software, or analytical methods. This requires an applications
review, where suitability can be verified. The ACM 150 monitor has an enormous
capacity for monitoring gases. It can accommodate changes in the gases it
monitors. Ask Honeywell Analytics about the detectability of gases you need to
monitor.
Record keeping
It is critical that an accurate record be maintained, correlating each ACM 150
sample point number to the name for the location of the monitoring point to which it
connects. A form to record those numbers and names is provided in Form 1 on page
59.
Each sample line must also be numbered with the connection point it is associated
with. It is also highly recommended that each line also be identified with a location.
This identification is necessary so that sample lines can be safely disconnected and
then later replaced correctly during maintenance and service procedures.
Filters, check valves and probes
In-line filters
The ACM 150 monitor requires a filter at the inlet of each sample line to protect the
tubing and internal sampling system from an accumulation of particulates. Honeywell
Analytics supplies one filter for each sample port. Install the filters at the sample
pick-up point when the tubing is run to each port.
If a port in not currently used, leave the cap over the inlet tube fitting, If there is no
cap, install a short run of tubing with the filter at the inlet. This keeps particulates out
of the bypass orifice which draws all on ports, used or not.
Check valves for line leak test (optional)
The ACM 150 monitors have the capability to perform an automatic Line Leak Test,
however, not all users may want this feature. To implement it, check valves must be
purchased and installed, one per sample port. They may be included with the original
order for the ACM 150 monitor, or they may be added later.
The check valves allow flow to pass through to the tube inlets to each ACM 150
monitor sample port. They seal off when air flows in the opposite direction during the
Line Leak Test. This causes pressure to build up in the sample tube. A tube that fails
to hold pressure has a leak.
The check valves must be installed at or very near the inlet of each sample tube with
the inline filters installed between the tube inlet and check valve. The inline filters
also keep the check valves clean so that they will seal tightly during the Line Leak
Test.
Locating the filters and check valves
The inline filters are require periodic replacement, and the check valves may require
occasional disassembly and cleaning. Try to locate both items where they are easily
accessible.
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