Operating procedure for high and low temperature test chamber

1. The laboratory shall take the specified proportion of products as test samples according to the [test order]. 2. Indoor temperature: 15 ~ 35℃, relative humidity: no more than 85%R.H. 3. Check the intact state of the test equipment to confirm that the equipment is normal 4. Confirm that the specimen is not "explosive, flammable or highly corrosive" substance. Two, high and low temperature test box test procedure 1. High temperature test 2. Open the main power switch 3. Place the sample in the test box, and the products shall not touch each other; Close the Test Chamber door. 4. Open the temperature controller and SET the temperature according to the specified requirements, the operation method is as follows: click the "SET" key once, the digital tube in the bottom row of the instrument flashes, use the "" displacement key to move the number, use" "to reduce the key and" "to increase the key to change the set value. After setting, click" set "key twice to return to the measuring surface. The value of T1 is "0", do not change it). 5. Press the start button, then press the time control switch to open the time controller, and set the time according to the specified requirements, the operation method is as follows: Click "◣" on the instrument, and the bottom window will blink with "▲" key. After the time (running time) is finished, click "back" (running key) when the window is no longer blinking, and the instrument will start timing. 6. After the high temperature test is finished, press the stop button, and take out the sample after the temperature drops naturally for 0.5h ~ 1h. 7. The samples taken out are placed in the air, cooled naturally for 1h ~ 2h, and the surface changes of the samples are observed, and recorded in the [high and low temperature test report]. 8. During the test, if the status of the samples needs to be observed, the lamp switch of the Test chamber can be turned on, but cannot be pressed for a long time. 9. Low temperature test (after the high temperature test, it must be cooled naturally for 0.5h ~ 1h, and then do the refrigeration test). 10. Open the main power switch. 11. Put the sample in the test box, and the products must not contact each other; close the test box door. 12. Press the temperature control switch to open the temperature controller, and set the temperature according to the specified requirements according to the above method of operating the temperature controller. 13. Press the start button, then press the time control switch to open the time controller, and set the time according to the specified requirements according to the above time control method. 16. After completing the low-temperature operation, press the stop button, and take out the sample after natural cooling for 0.5h ~ 1h. 17. Put the sample out in the air for 1h ~ 2h, observe the changes on the surface of the sample, and fill in the [scrap for high and low temperature test] according to the test requirements. 18. After the test is completed, set the machine at 60℃ for 30 minutes of dry operation. Precautions for high and low temperature test box 1 During the operation, unless absolutely necessary, please do not open the door of the box, otherwise it may lead to the following adverse consequences.

• High temperature air flows out of the box ------ Very dangerous

• The inside of the door remains hot ---- scald

• High temperature air may trigger the fire alarm, resulting in misoperation

2, please note that the machine must be safely grounded to avoid electrostatic induction.

3, avoid closing and then opening the freezer unit within three minutes.

4, if the box is placed hot test, test power control please use external power supply, do not directly use the power supply of the machine. When placing high temperature samples for low temperature tests, it should be noted that the time to open the door should be as short as possible.

5, circuit breaker, overtemperature protector, to provide the safety protection of the machine test products and operators, so please check regularly.

6. It is absolutely prohibited to test explosive, combustible and highly corrosive substances.

7, the lights should be turned on except when necessary, the rest of the time should be turned off.

8. Before doing low temperature, the studio should be dried and dried for 1 hour at 60 ° C.

9, do high temperature test, when the temperature exceeds 55℃ above the case, do not open the cooler.

10, in any section perpendicular to the dominant wind direction, the sum of the test load section area should not be greater than one third of the working section.

11. Please read the instructions carefully before you can operate the machine