Constant temperature and humidity test chamber is a kind of test equipment used to simulate different temperature and humidity environmental conditions. Here are some common problems you may encounter and calibration methods:

Q&A
Temperature or humidity readings are inaccurate.

The temperature or humidity is unstable.

The device is not evenly heated or cooled.

The device is leaking or the tank capacity is insufficient.

Calibration method
Temperature calibration: Place the thermometer in the test chamber and set the chamber to a known temperature. After waiting for some time, the thermometer reading is compared with the temperature reading displayed in the test chamber. If there is a difference, a calibration adjustment is required.

Humidity calibration: Use a humidity calibrator to place it in the test chamber and set the test chamber to a known humidity. After waiting for some time, compare the humidity calibrator reading with the humidity reading displayed in the test chamber. If there is a difference, a calibration adjustment is required.

Equipment uniformity calibration: Place several thermometers or hygrometers inside the test chamber and set the test chamber to a known temperature or humidity. After waiting for a period of time, compare the readings at each measurement point to see if they are consistent. If there is a difference, a uniformity calibration adjustment is required.

Equipment tank capacity calibration: Fill the tank in the test box with water and record the water capacity. Then set the test chamber to a certain humidity, measure for a period of time, and then pour out the tank and record the remaining water capacity. Subtract the remaining water capacity from the previously recorded water capacity to obtain the amount of water used by the test chamber at this humidity. If the amount of water used is not consistent with the capacity in the specification, a tank capacity calibration adjustment is required.

To ensure accurate and reliable test results, the constant temperature and humidity test chamber needs to be calibrated and maintained regularly. Calibration and maintenance should be carried out by experienced technicians and in accordance with the equipment’s operating manual.

How to correctly calibrate the constant temperature and humidity test chamber?

Common problem solving
In addition, here are some ways that may help with common problems:

Inaccurate temperature or humidity reading: Check whether the sensor is damaged or needs to be replaced, check whether the sensor is in an appropriate position, and ensure that the sensor is the same temperature or humidity as the test chamber.

Unstable temperature or humidity: Check whether the equipment is disturbed by the external environment, ensure that there is not too much debris or samples inside the test chamber, and ensure that the test chamber is well sealed.

Uneven heating or cooling of the equipment: check whether the heating or cooling components are uniform, check whether the equipment needs to be cleaned or replaced, ensure that there is no excessive debris or samples inside the test box, and ensure that the test box is well sealed.

Equipment leakage or insufficient tank capacity: check whether the tightness of the test box is good, check whether the tank needs to be cleaned or replaced, ensure that there is not too much debris or samples inside the test box, and replenish the water in the tank in time.

Finally, in order to maintain the performance and reliability of the test chamber, regular maintenance and maintenance are required. It is recommended to clean the inside of the test chamber regularly, check the performance and condition of the heating, cooling, control, sensor and other equipment, and replace or repair the faulty parts in time. At the same time, it is recommended to follow the equipment operation manual and maintenance instructions provided by the manufacturer to maintain and maintain the test chamber for a long time.