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NDIR Gas Analyzer Settings and Calibration
Teledyne Analytical Instruments 45
Alarm Setting Descriptions
The alarm contact number can be assigned to any channel.
Channels can also have multiple alarms assigned to them.
Channel: Channel setting targeted for alarm.
H-Limit value: Sets the high limit value (concentration) for
alarm.
L-Limit value: Sets the low limit value (concentration) for alarm.
Kind of Alarm: Select either High limit alarm, Low limit alarm,
and High limit or Low limit alarm, HH limit
alarm, and LL limit alarm.
High, HH: Alarm contact closes when above
H-limit alarm.
Low, LL: Alarm contact closes when below
L-limit alarm.
High or Low: Alarm contact closes when above
H-limit value or below lower limit
value.
ON/OFF: Enables the alarm function when set to ON, or
disables it if set to OFF.
Note: The H-limit value cannot be set below the L-limit value, and
the L-limit value cannot be set above the H-limit value.
If it is desired to set the H-limit value below the L-limit
value already stored in the memory, reduce the L-limit
value beforehand, and vice versa for setting the low limiot
above the high limit.
Note: After turning on power, the alarm logic trigger is inactive for
10 minutes.
When an H-limit alarm occurs, the
“H-alarm” message displays in the relevant
component field. Other alarm displays are:
L-alarm for Low-limit alarm, HH-
alarm for high limit alarm, HH-alarm for
high-high alarm, and LL-alarm for low-
low alarm.