1. The infrared carbon and sulfur analyzer turns on the power of the detection device, the light on the switch is off, there is no indication of the upper and lower temperature, the fuse is broken, replace the fuse. Second, there is data out serially, but the signal value of carbon pool or sulfur display is abnormal, so how to check it, Nanjing Huaxin Analytical Instrument Manufacturing Co., Ltd. will introduce it: (1) If the data appears 2V or more, then there must be a problem with the 7135 chip or its peripheral circuit on the corresponding A / D sampling board. (2) If the displayed data is very small below 0.05V, there may be a problem with the light source or modulation motor in the corresponding measurement cell. At this time, you can first observe whether the voltage of the two in the F2 function is normal. You can check whether the motor is normal or not. You can judge whether there is slight vibration by holding the motor by hand. (3) If the data on the screen jumps randomly, it is necessary to use a digital multimeter to detect at the same time. If the number displayed on the multimeter is normal, it means that there is a problem with the device on the sampling board. If the measurement data of the multimeter is also abnormal, there may be a problem with the front panel. 3. When the infrared carbon and sulfur analyzer is turned on in the carbon and sulfur data frames, the carbon pool value and the sulfur pool value will not change. This type of failure is generally caused by no serial data. The check method is as follows: Editor's note: Infrared carbon and sulfur analyzers are mainly used for the analysis of carbon and sulfur in ferrous metals, nonferrous metals, rare earth inorganics, ores, ceramics and other materials in metallurgy, machinery, commodity inspection, scientific research, and chemical industries. This article shares some causes and troubleshooting methods of infrared carbon and sulfur analyzers. (1) Turn off the power and check whether the serial connection plug is loose. Unplug the cable and plug it in again. After turning on the power, no data continues to be transmitted. (2) Turn off all power supplies, and repeat the operation several times in accordance with the "operation steps from turning on to normal operation". The signal data is still not displayed on the screen. (3) Lead the main board in the control box with an extended circuit board, and use a multimeter to measure whether the 5V power supply of the main board is normal. If it is abnormal, check the power board. It is judged that the three chips 89C51, GAL, and 232 on the motherboard are damaged. (4) The above checks are normal, you can turn on the power, and observe that there is data in the carbon data box on the screen, which shows that the A / D7135 chip and its peripheral circuits corresponding to the carbon pool are good. On the contrary, there may be a problem with the components on the sampling board or the 8155 chip on the motherboard, the ± 5V power supply for A / D is not good, and the printed circuit board is inserted backwards. (5) During the inspection process of infrared carbon and sulfur analyzer according to the above, if it is judged that there are problems with the chips or the power supply, then the solution is to replace the chip or replace the corresponding printed circuit board. Stock Pot Set,Stockpot With Lid,Stainless Stock Pot,Stainless Steel Stockpot SUZHOU JIAYI KITCHENWARE TECHNOLOGY CO.,LTD , http://www.jiayi-kitchenwares.com