Ten points to pay attention to before conducting experiments in high and low temperature test chamber

In normal applications, manufacturers of high and low temperature test chambershould pay attention to maintenance and upkeep after conducting experiments, which can increase the service life of the equipment and also make the experiments more effective.

1. Before conducting an experiment, it is necessary to check whether the water level line of the storage head is too high or too low. If the water overflows or the water head is too low, the moisture absorption of the dry bulb temperature detection cloth may be abnormal, thereby endangering the accuracy of the dry bulb temperature. The water level should be maintained at approximately six minutes full.

2. After conducting two or three experiments, it is necessary to check the height of the water storage chamber, and the height of the water storage chamber can be adjusted according to specific conditions.
3. If you want to observe the changes in the box during the inspection, you can turn on the indoor light (LIGHT) power switch and learn about the internal changes through a dialog chamber.

4. If the high and low temperature chamber manufacturer operates below 0 ℃, they should try to reduce the opening of the tailgate as much as possible. Due to low temperatures, opening the tailgate can easily cause ice sealing conditions in the internal air conditioning evaporator and its position, especially when the temperature is lower. If it is necessary to open it, the opening time should be minimized as much as possible.

5. When operating at low temperatures, try to set a temperature standard of 60 ℃ and implement a dry solution for about 30 minutes to prevent endangering the measurement time or freezing conditions of the next working environment.

6. The heat pipe radiator (cooler) of the refrigerator should be maintained on time and kept clean.
7. The water inlet pipe of the humidification bucket must completely exhaust the remaining gas to prevent moisture from entering.
8. In actual operation, unless it is necessary, please do not open the tailgate, otherwise it may cause the following adverse effects
9. Proper equipment with a dry bulb temperature of sand cloth can ensure the measurement of appropriate air humidity.
10. The refrigeration unit should be repaired and maintained on time, and cleaned on time. For the theme activity components, they should be lubricated according to the instructions, and the maintenance and inspection of the automatic control system of household appliances are essential in this work.

Factors that slow down the cooling speed of high and low temperature test chambers:
1. Observe the refrigeration unit during the operation of the equipment to see if it can be started, and whether the refrigeration compressor can be started during the operation of the high and low temperature test chamber. This indicates that the power circuit from the main switch power supply to each refrigeration compressor is normal, and the circuit system is not faulty.

2. After checking the circuit system of the high and low temperature test chamber, there were no issues. Then, we checked the refrigeration unit. Firstly, we checked that the exhaust pipe and respiratory working pressure in the low-temperature (R23) refrigeration compressor of the two refrigeration units of the equipment were lower than the standard value, indicating that the respiratory working pressure was being exhausted, indicating that the refrigerant volume of the main refrigeration unit was insufficient.

3. Touch the outlet and suction pipes of the main unit (R23) compressor with your hand. If you find that the temperature of the exhaust pipe is not high enough and the temperature of the suction pipe is not low (without frost), it indicates that the refrigerant of the main unit (R23) is not enough.

4. The cause of the malfunction has not been clearly identified, and further confirmation of the cause of the malfunction must be conducted in conjunction with the laboratory control process. There are two refrigeration units in each laboratory. One is the main unit and the other is the auxiliary unit. When the cooling rate is high, both units need to operate simultaneously. During the insulation phase, both units also need to operate synchronously.

5. When the equipment temperature starts to stabilize, the auxiliary unit should stop working and the main unit should maintain temperature stability.
6. During the temperature maintenance phase of the high and low temperature test chamber, once the auxiliary unit stops operating, the main unit has no cooling effect, and the air in the equipment will slowly rise.

When the temperature rises to a certain level, the control system of the equipment will start the auxiliary unit cooling, reduce the temperature to the set value, and the auxiliary unit will stop working. If repeated, a malfunction will occur.

How to set the testing temperature control for high and low temperature test chambers:
1. Temperature control of high and low temperature test chambers
Temperature sensor: It is a platinum resistance sensor with high accuracy. The output power of temperature control is calculated by a microcomputer, which can achieve high-precision and high-efficiency electricity consumption results. Adopting a thermal balance temperature regulation method to control the coordination of the temperature system. There is an automatic defrosting setting in the return air outlet.

2. Material of the high and low temperature test chamber: The equipment inner liner is made of stainless steel plate. The equipment casing is produced and processed using a thick steel plate CNC lathe, and the surface of the casing is subjected to electrostatic spraying. At least this looks beautiful, elegant, and tidy. The equipment insulation material is made of high-density fiberglass cotton and polyurethane hard foam, with a insulation cotton thickness of 100mm/120mm.

The observation window in the chamber is made of multi-layer tempered glass, and there is a lighting lamp inside the chamber. The chamber also contains a conductive film with internal measuring adhesive plates for heating and defrosting, so that the observation and testing process can be clearly seen from a close distance.
Adopting a two-layer heat-resistant and low-noise central air conditioning type electric motor with multi blade centrifugal impeller can ensure temperature cycling. High temperature and high expansion sealing strips can be used between the equipment box and the door to ensure the airtightness of the tested area.

Temperature Humidity Chamber | Thermal Chamber | Climate Chamber is according to IEC60068-2-1 (GB/T2423.1) and IEC60068-2-2 (GB/T2423.2), IEC60068-2-78, IEC60598-1, GB/T2423.17, GB/T5170.2, GB/T5170.5. The climate chamber is used to test the CFL/LED which meets IES LM-80-08, electricity products, automative cars, home appications and mobiles.

What is Climate Chamber?

Climate chambers is used to simulate a temperature enviromental condistions, it may also be called environmental chambers or Thermal Chamber or Temperature Chamber. You can click the below videos to learn the details and also how to operate it.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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