H2 and CH4 Sensor Zero Failure On GastroCH4ECK

Why is my GastroCH4ECK showing a red cross and a pink circle?

This means that the sensor has not been purged correctly and there may be some traces of gas present inside the unit or on the sensor.

You should reattempt to do a breath test or bag test. If the problem persists then you should perform a recalibration. If the problem continues to persist after you have tried these then you should Bedfont or your distributor for support.

If the problem persists or has not been resolved by the information provided above, please contact Bedfont or your local distributor for more advice.