Calibration Troubleshooting

Error Screen	Problem	Solution
	Auto-zero Unsuccessful H₂S, CO, or LEL sensor fails to autozero, or O₂ sensor fails to calibrate	Attempt calibration again. Refer to Calibration. If ERROR displays again, replace the sensor. Refer to Replacing a Sensor or Sensor Filter.
	Auto Span Unsuccessful H₂S, CO, or LEL sensor fails to auto-span.	Ensure sensor is enabled. Verify gas cylinder is not empty or past the expiration date. Check/replace the regulator. Attempt calibration again. If the sensor fails the span again, refer to Replacing a Sensor or Sensor Filter.
	IR Lock Enabled IR-Lock displays when calibration is attempted.	Perform calibration using the IR Link with Fleet Manager II software, or insert the detector into the MicroDock II station. Refer to Cal Lock (Calibration IR Lock) in User Options and Calibration.
	No Gas Detected If the gas is not detected about 30 seconds after the APPLY GAS message is displayed, the detector fails the calibration.	Ensure the sensor is enabled. Verify gas cylinder is not empty or past the expiration date. Check/replace the regulator. Attempt calibration again. If the calibration fails again, refer to Replacing a Sensor or Sensor Filter.
	Calibration Due Date Overdue A sensor displays a negative number for a next due date after calibration is performed.	Calibration for the sensor was unsuccessful. The due date will not reset. Attempt calibration of the sensor again. If still unsuccessful, refer to Replacing a Sensor or Sensor Filter. Calibrate the new sensor immediately.