The maximum temperature of the high and low temperature testing machine is 180 degrees, which is mainly caused by electric heating of nickel-chromium alloy. If the test box does not heat up, the total power of the machine should be turned off first, and the heating circuit breaker should be checked for tripping. On, if not, continue to check down, first use the multimeter's resistance file to measure whether there is a resistance of about 20 ohms between the output end of the solid state relay (2 feet) and the N line (depending on the different models) If not, it means that the heating wire is open, and it is important to check whether the heating wire is damaged. If the heating wire is not damaged, open the side cover of the distribution box to operate the machine and warm up, and observe whether the conduction indicator on the solid state relay is Bright, if there is light, (use the multimeter's voltage file, measure the output of the solid state relay (1 pin) to the N line for 220V voltage, if not, then check the contactor, if there is, then measure the solid state relay Whether the output (2 feet) has 220V voltage to the N line, if not, it means that the internal open circuit of the solid state relay is damaged and must be replaced.
Secondly, if the conduction indicator on the solid state relay is not lit, use the DC voltage file of the meter to measure whether the input terminal (3, 4-) has a signal voltage of 12V or more. If not, there may be no output from the controller. Or damaged.
Finally, check whether the heater is damaged. Remove the sealing plate inside the high and low temperature test case. Use a universal meter to measure whether the two ends of the heating wire are conducting. The conduction is good. Otherwise, it is proved to be damaged and replaced.
Attachment: High and low temperature test machine is not constant temperature, large fluctuation solution
1. Adjust the parameters. When the real-time temperature of the device is running close to the set temperature, click the “AT†button on the running screen to adjust the PID. Please wait patiently. When the “AT†in the upper right corner of the screen is not clear, it indicates that it has been self-tuned. Finished
2. The ACU module of the sensor or controller is damaged or defective, causing temperature instability and fluctuations;
3, check whether the circulating motor is running normally, whether the wind wheel is stuck, causing the wind belt to be fast and slow;
4. The test specimens in the test chamber are piled up too much (normally, they do not exceed one-third of the total volume of the inner tank), resulting in the wind not being able to circulate and the temperature fluctuations being large.
Designed as a concenient solution for temporary storage and transferring slide. Accommodates both the Yushuoda standard Microscope slides in dimensions of 75.0 mm* *25.0 mm with thickness from 0.8 mm to 1.2 mm and also the microscope slides of 76.0 mm*26.0 mm *(0.8 -1.2 ) mm on the market.
Slide Box,Slide Storage Box,Microscope Slide Boxes,Microscope Slide Storage Box
Xinxiang Vic Science&Education Co.,Ltd. , https://www.labmedicalscience.com