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info@inquiry@ato.com.cn How to Solve a Gas Detector Value Fault?
In the air, if there are no target gases to be measured but the numerical fluctuations are huge or the numerical values vary significantly, it means there are numerical defaults with the gas detector. Then, how should the numerical defaults be resolved? 
Countermeasures:
Generally, if the zero-point fluctuation scope is smaller than 1% of the maximum range within a short period of time, it belongs to a normal scope. If there are no target gases measures, and the drift for a long period of time is smaller than 2% of the maximum range, it belongs to the normal scope. Beyond this scope, it should be confirmed that whether the target gases to be measured exist onsite or if the fluctuations of moisture and temperature in the air are huge, the numerical value might be unstable. Under general conditions, temperature and moisture fluctuations might be too large to cause large fluctuations of the instrument within a short period of time. When the temperature and moisture in the air become constant, the numerical value will become relatively stable.
It should be confirmed that whether zero-point calibration or target-point calibration is necessary for the instrument. If zero-point calibration is conducted on the occasions with the target gases to be measured, the low-concentration gases might fail to be detected. If the target-point-calibration is conducted on occasions with target gases to be measured, but the calibrated concentration value and the actual concentration value are inconsistent with each other, the instrument value might fluctuate significantly or the numerical value detected might be small. Under these two conditions, the ex-factory operations can be resumed as a solution.
If the problem still fails to be resolved, it should be confirmed whether the high-concentration gas enters the gas detector or the high-concentration gas has exerted an impact on the sensor. If there is high-concentration gas impacting on the sensor, the instrument should be connected with power and aging for 24 hours. After that, if the numerical value is still unstable, it suggests the sensor might be damaged by the impact.
Countermeasures:
Generally, if the zero-point fluctuation scope is smaller than 1% of the maximum range within a short period of time, it belongs to a normal scope. If there are no target gases measures, and the drift for a long period of time is smaller than 2% of the maximum range, it belongs to the normal scope. Beyond this scope, it should be confirmed that whether the target gases to be measured exist onsite or if the fluctuations of moisture and temperature in the air are huge, the numerical value might be unstable. Under general conditions, temperature and moisture fluctuations might be too large to cause large fluctuations of the instrument within a short period of time. When the temperature and moisture in the air become constant, the numerical value will become relatively stable.
It should be confirmed that whether zero-point calibration or target-point calibration is necessary for the instrument. If zero-point calibration is conducted on the occasions with the target gases to be measured, the low-concentration gases might fail to be detected. If the target-point-calibration is conducted on occasions with target gases to be measured, but the calibrated concentration value and the actual concentration value are inconsistent with each other, the instrument value might fluctuate significantly or the numerical value detected might be small. Under these two conditions, the ex-factory operations can be resumed as a solution.
If the problem still fails to be resolved, it should be confirmed whether the high-concentration gas enters the gas detector or the high-concentration gas has exerted an impact on the sensor. If there is high-concentration gas impacting on the sensor, the instrument should be connected with power and aging for 24 hours. After that, if the numerical value is still unstable, it suggests the sensor might be damaged by the impact.
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