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ACM 150
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Refer to
scanning. If you want to scan a point that is not enabled, go to the Single
Point Configuration to enable it.
Note that if you are not ready to enable a point, you can put it in the sequence
now and enable it later. To enable it later, first enable it in the Single Point Con-
figuration. Then, enable it in the Order of Scan.
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If you change the order of scan, you will have to re-enter the scan points
starting with the change you made until the new sequence is complete.
Scroll down the list, as needed, to complete all of your entries.
Note that if you want to scan points in their numerical order, enter a sequence,
e.g. 1-40.
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Select the points you want to enable at this time. Enabled points have a blue
dot.
If you must take a point out of the scan sequence temporarily, remove the
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blue dot to disable it. When it is ready to scan again, enable it.
Note that when tools are taken out of service, e.g. to be moved or replaced, or
when construction work is on-going at a point, you can put scanning of these
points on temporary hold.
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Press RESET FIELDS, if you make a mistake and want to recover the prior
sequence.
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After you complete your selections, press "SUBMIT CHANGES" to make
them active.
Composite points
Up to 4 points may be sampled together by the FTIR to speed up the scan rate.
The disadvantage of composite sampling is that the lower detection limit is raised
because the sample from one point is diluted by the flow from the other sample
points in the group.
When the ACM 150 monitor detects any non-zero gas concentration, it finds which
point has the target gas by searching, one-by-one, through all the points in the
group. Because any gas concentration other than zero will trigger a search, water
detection should not be active on any composite points.
When the points are scanned individually, they are treated as any point in normal
scanning. The dilution factor does not apply. Alarm 1 / Alarm 2 incidents initiate the
actions as described in
Composite Point groups have only one advantage. They shorten the scan cycle.
Since the ACM 150 monitor typically monitors air having no target gases present,
the readings are zero most of the time. Composite sampling enables the ACM 150
monitor to increase its rate of scan until a gas leak occurs.
Configuration
key. This shows you which points are enabled for
Alarm 1/Alarm 2 incidents and
Actions.
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