When using a climate chamber, humidity sometimes will not rise or fall; the points below analyse this with you:
I. Climate chamber humidity disagrees with the reference source
1. Chamber temperature sensor faulty.
2. Measurement board not working properly.
3. Sensor not properly connected to the measurement board.
2. What to do when the chamber's humidity reading is too high
1. Wet-bulb gauze dirty or fitted wrongly.
2. Sample or heat load beyond rated range.
3. Refrigerant leak, blocked lines or solenoid fault; check compressor current.
4. Door opened too often; evaporator frosted too thick.
5. Humidity transmitter faulty.
III. Climate chamber humidity display stuck at 99.9% - remedies
1. Wet-bulb gauze dry (no water).
2. Solenoid valve for wet-bulb water supply faulty.
3. Insufficient supply from the water purifier.
4. Humidity transmitter faulty.
4. What to do when the chamber's humidity is too low
1. Humidifier circuit breaker tripped or AC contactor damaged.
2. Solid-state relay in the humidifier circuit failed.
3. Insufficient water to the humidifier or humidifier solenoid faulty.
4. Humidity transmitter faulty.
