Flue gas humidity meter (flue gas moisture meter) common faults and treatment methods
Fault phenomenon
cause of issue
Approach
The meter indicates that the scale is on the line.
1. Moisture immersion or sample moisture is too high
2. The probe or other components in the circuit are shorted
3. The probe is contaminated with conductive solid or liquid
4. After the probe is cleaned, the meter still refers to the full scale.
1. Stop energizing and dry the sample
2. Replace the probe or other short circuit components
3. Clean the probe with reagent hexane or toluene and dry
4. Describe the probe short circuit and send it to the factory for repair.
Meter reading is “ 0 †or “ 0 â€
1. Poor contact of the plug or cable, causing an open circuit
2. Probe open circuit
1. Handling open circuit components
2. Remove the probe. When the probe chip is short-circuited to the outside, if the meter exceeds the full scale, it proves that the probe is open.
Meter reading is not allowed
1. The sample temperature is too high
2. Particles in the sample cause
3. The sensor is used for too long, causing drift
4. Sample system balance time is insufficient
5. The dew point on the sampling point is different from the dew point measured by the meter
6. Sensor pollution
7. Sensor corrosion
1. Increase the length of the sampling pipeline or use other heat transfer methods to cool down
2. Filter dust removal, recalibrate the sensor
3. Recalibrate the sensor
4. Change the flow rate and balance the sample system with enough time
5. Check the pipeline for leaks and check whether the inner surface of the pipeline absorbs moisture.
6. Wash and dry the sensor
7. Clean and dry the sensor, recalibrate the sensor, if the corrosion is severe, you need to replace the sensor
Instrument response is very slow
1. The sample flow rate is too slow
2. Probe contamination
1. Speed ​​up sample flow rate
2. Cleaning the probe
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