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4. Calibration, AFTER INSTALLATION
Startup calibration
When the system has been installed, it is important to do a calibration since the sensor could have
become uncalibrated during transportation.
The sensor needs to be powered for at least 20 minutes before the calibration can be done, to
make sure it is heated up and adjusted to the environment. Try to make sure that the room is well
ventilated.
Instruction:
A more detailed instruction can be found in chapter 7.5, ”Service Mode Three”, in this manual.
1. Press and hold the button on the sensor for 10 seconds.
2. When the asterisk (*) in the upper right corner of the display is lit, push the button
shortly. Repeat this five times in a row to enter the Calibration mode. For each correct
push of the button, a dot will be lit in the lower left corner. If an incorrect push happens,
the procedure starts over again.
3. The instructions in the display will say Push the button to start calibration. Push the
button short and a 90 second timer starts counting down. If the calibration is successful,
the display will show “Calibration OK” and go back to Service Mode One, for 30 seconds,
and then go to “normal view”.
Automatic calibration - Activated or deactivated
The LogiCO2 O2 sensor has an automatic self calibration function activated as standard, so after the
first start up calibration, no further manual calibrations should be needed in normal conditions.
However, if the O2 Sensor is used in an area that can have an abnormally high O2 concentration, the
AUTO-CAL must be deactivated by setting the DIP-switch number 6 (on the printed circuit board) in
up position. If you wish to use the alarm function for high levels of O2, for example an alarm at 23%,
the automatic calibration does also need to be deactivated.
If you have deactivated the automatic calibration, manual calibrations will need to be done at least
every 6 months if the sensor is installed in an normal environment.
If the sensor is installed in a rough environment, calibrations might need to be done more often. The
manual calibration procedure is the same as the ”startup calibration” procedure.
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