PureAire Monitoring Systems, Inc.
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4.6.5 Set Alarm Delay
Push the joystick down to access the next main menu,
Alarm Delay.
The display will
scroll the following:
This is the amount of time an alarm level concentration of oxygen must be present
before the instrument’s gas concentration alarm(s) will be activated. This menu will
permit setting a user selected time delay for activating alarm relays 1 and 2. You can
select from 0 seconds up to 255 seconds after an alarm level has been exceeded before
the alarm relays to activate.
To change this value, push the joystick right to display the time screen. The display will
indicate a value between 0 and 255 seconds. Pushing the joystick up increases the value
and pushing the joystick down decreases the value. Press
ENTER
to accept the value.
After entering the alarm delay, the display will default back to the Alarm Delay menu
and the display will scroll the following:
NOTE:
The alarm delay is only available for alarms 1 and 2. There is no delay for
the fault relay. Any system fault will immediately activate the Fault Relay.
4.6.6 Set Zero Suppression
This setting is used to decrease the sensitivity of selected gas sensors. It essentially
programs the instrument to ignore gas measurements that are below the programmed ppm
level (% full scale).
EXAMPLE:
If the measurement range of the instrument is 0 to 30 ppm, gas measurements below 0.5 ppm
will be displayed and output as 0 (zero) when the suppress level is set at 0.5ppm.
…Alarm Delay…
0.0ppm
005
0.0ppm
…Alarm Delay…
0.0ppm
…Zero Suppression…
0.0 PPM
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