PureAire Monitoring Systems, Inc.
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5.5.2 Set Alarm Threshold Polarity
Alarm Threshold Polarity determines if an alarm concentration is set above or below a
threshold value. For example, if an alarm of 19.0% for Oxygen is selected, the Alarm
Threshold Polarity must be set to
Invert
for the monitors alarm to activate when the
reading goes below 19.0%. For CO
2
gases selecting a
Normal
setting for the Alarm
Threshold Polarity means that the system will alarm when the gas concentration
exceeds, goes above, an alarm set point. This menu will permit the selection of the
alarm polarity. To access this menu from the “Set Formats” menu, push the joystick
down to display the
Set Alarm Threshold Polarity
adjustment menu. This will scroll
on the digital display.
Push the joystick right to access the first sub menu;
Set Alarm 1 CO2 Polarity
will
scroll on the display. This is the menu at which to adjust the CO
2
alarm polarity
state on the CO
2
Monitor.
To change this value, push the joystick right to display the relay state. The display will
Indicate
NORMAL.
Pushing the joystick down will change the relay state from
NORMAL to INVERT.
NOTE: When the CO
2
relay state is changed to INVERT, the internal horn will
sound.
After entering the polarity push the joystick left to enter the setting. The display will
scroll the following:
Push the joystick down to access the next sub menu;
Set Alarm 2, CO
2
, Polarity
will
scroll on the display. This is the menu at which to adjust the second level alarm polarity
state on the CO2 Monitor.
..Set Alarm Threshold Priority.
.
NORMAL
INVERT
..Set Alarm 1, CO2, Polarity..
..Set Alarm 1, CO2, Polarity...
..Set Alarm 2, O2, Polarity ..
