31 • Chapter 7: Maintenance
AirLink 7543 Gas Monitor Operator’s Manual
Chapter 7: Maintenance
Calibration Mode
Entering Calibration Mode disables the relays and allows the sensors to be calibrated without
triggering alarms. Once in Calibration Mode, the unit will remain in this state for two hours—unless
MENU
is pressed.
1. Open the enclosure box to expose the Front Panel.
2. To enter Calibration Mode, from Normal Operating Mode, press and hold
MENU
and
ADD
for 5
seconds.
3. Once in Calibration Mode, the display appears as shown below.
4. To return to Normal Operating Mode, press and release
MENU
.
NOTE:
If
MENU
is not pressed, the unit will remain in Calibration Mode for two hours.
5. Close the enclosure box.
6. Clamp down the enclosure latches.
Relay Test Mode
Relay Test Mode activates each relay and can be used to determine whether or not the relays and
attached alarms are functioning properly.
1. Open the enclosure box to expose the Front Panel.
2. To enter Relay Test Mode, from Normal Operating Mode, press and hold
MENU
and
SUB
.
3. Starting with Relay 1, the relays will activate in 5-second intervals. Continue to hold
MENU
and
SUB
.
4. Release
MENU
and
SUB
.
5. To return to Normal Operating Mode, press and release
MENU
.
6. Close the enclosure box.
7. Clamp down the enclosure latches.
