10 months ago
#3493 Quote
Typical alarm thresholds for containment differential pressure monitoring are:

High Value On == -0.02
High Value Off == -0.021
Low Value Off == -0.5
Low Value On == -0.6

Note that the low values are set so low as to be "dont care" meaning excessively negative pressure will not be alarmed on since you can't be too negative.  The low values are however chosen to be in a range that the pressure sensor might report in error so if they do happen you should investigate.  The most common reason for excessively low pressure readings are kinks in the pressure tubing.
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