6.0 Maintenance Guide
8. Inject bottled span gas (using regulator, tube and cap) into
rst sensor and wait until the gas reading stops going up.
The span gas used must be within the range of sensor’s
scale.
9. Adjust the reading up or down to match the concentration in
the bottle
10. Press ↑ and ← at the same time to save
11. If second sensor installed press → and repeat steps 4 to 10
for sensor B
12. Press and hold left arrow for 3 seconds to return to settings
and home.
6.3 Calibration Procedure for Refrigerant (type 13, 20) and
VOC (type 01) sensors
1. Use certied bottled calibration gas mixed with air only, not
nitrogen. Ensure that monitors are powered on for a minimum
of the break-in period for the sensor. For these types
sensors, this is two days.
2. Inject bottled span gas
3. Adjust the blue potentiometer on the module to set the
sensor reading displayed to that of the bottle mix. Do not
change the factory calibration constants in calibration mode
as above.
4. Remove span gas mix and supply air. Sensor will return to zero.
5. If sensor does not return to zero, it needs replacement.
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