PM 1 Installation and Operating Manual v1.2
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FilterSense © 2016
6.2 Alarms (PM 1-A)
Two alarms are available in the PM 1-A. An alarm will be activated when the particulate measurement increases
above (HI Alarm Logic) or decreases below (LO Alarm Logic) the Alarm Setpoint continuously for a period
longer than the Alarm Delay setting. The LED status will correspond with the associated alarm. The default
alarm configuration is listed below.
ALARM LEVELS
Appropriate alarm levels will vary by process and user needs. Default alarm levels
should not be relied on without careful review of each process.
Alarm Settings
Setting
Default
Notes
A1 Setpoint pA
30
Limit for alarm 1 activation
A1 Delay Seconds
10
Amount of time reading must be in alarm condition to activate alarm 1
A1 Logic
HI
Activation logic (HI or LO)
A1 Fail-Safe
No
Determines relay state of alarm 1 output (closed/open)
A2 Setpoint pA
100
Limit for alarm 2 activation
A2 Delay Seconds
5
Amount of time reading must be in alarm condition to activate alarm 2
A2 Logic
HI
Activation logic (HI or LO)
A2 Fail-Safe
No
Determines relay state of alarm 2 output (closed/open)
Alarm Logic
Alarm Logic defines how the particulate alarms are activated. When the Alarm Logic setting is set to HI, the
alarm is activated when the input rises above the Alarm Setpoint continuously for a period longer than the
Alarm Delay. When Alarm Logic is set to LO, the alarm is activated when the input falls below the Alarm
Setpoint continuously for a period longer than the Alarm Delay. LO Alarm Logic is used for loss of flow
applications.
Fail-Safe Relay State
Fail-Safe Mode
Power Off/Removed
Normal Operation
Active Alarm
Normal (No)
Open
Open
Closed
Fail-Safe (Yes)
Open
Closed
Open
Summary of Contents for DynaCHARGE PM 1 PRO-A
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