Haltech Wideband 02 Controller Manual - Manual (Page 9)

4. First Time Use
1. Do not connect the sensor yet.
2. Switch 12V supply to the HWC on and wait for 10 seconds.
3. Switch the 12V supply off after 10 seconds.
4. Connect the sensor to the sensor interface connector. The sensor must be exposed to air
for the first time calibration.
5. Switch
the HWC on and wait for 2 minutes.
If you connected a LED to the calibration button, you will at first see the LED blink slowly and
steadily. If it blinks for a fixed number of pulses, then switches off for 2 seconds and then repeats,
you have an error code. See chapter X for details.
Slow and steady blinking indicates that the sensor is warming up to its optimum operating
temperature. The warm-up period will last for about 30 seconds for a cold sensor, depending on
the sensor type used.
After the sensor is warmed up the meter automatically calibrates the sensor heater controller to
the particular sensor. During this 20-second period the HWC collects and calculates sensor
specific data required to quickly reach operating temperature in the future. After the first time use
the meter will use these values to regulate the sensor's temperature. During the heater calibration
the optional LED will blink fast and steady.
After that period the HWC will automatically perform a free air calibration. During this 2-second
period a connected LED will go off. The HWC will now calibrate itself by using air as a reference
gas with known oxygen content.
After the free air calibration is finished the LED should light up steady and continuously,
indicating correct operation of the HWC.
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