PureAire Monitoring Systems, Inc.
34
5.5.7 Set Zero Suppression
This menu is provided to decrease the sensitivity of selected gas sensors. It essentially
programs the instrument to ignore gas measurements that are below the programmed
ppm level.
EXAMPLE: If the measurement range of the instrument is 0 to 10 ppm, gas
measurements below 0.5 ppm will be displayed and output as 0 (zero) when the zero-
suppression level is set at 0.5ppm
Push the joystick down to access the next main menu,
Zero Suppression.
The display
will scroll the following:
To change this value, push the joystick right to display the Zero Suppression 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.
After entering the zero suppression ppm, pushing the joystick left, the display will
default back to the Zero Suppression menu. The display will scroll the following:
5.5.8 Set Alarm Thresholds
This main menu will permit adjusting the gas ppm concentration that will activate
alarm levels 1, 2 and Audio alarm relays. Push the joystick down to access the
main menu,
Set
Alarm Thresholds.
The display will scroll the following:
To change these values, push the joystick right to display the
Set Relay 1 Alarm
Threshold
. The display will scroll the following
…Zero Suppression…
0.0 ppm
..Set Alarm Thresholds..
0.0 ppm
..Set Relay 1 Alarm Threshold…
0.0 ppm
0.5 ppm
0.0 ppm
…Zero Suppression…
0.0 ppm
