Hey! ! ! It depends on which detector you use first! ! ! If FID detector is used, it should be done as follows: first, open the nitrogen valve, and after the gas flows in the chromatograph for a few minutes, turn on the GC power supply and start the GC; Press "System" to adjust the temperature of each part, including the temperature of chromatographic column, inlet and detector. Please note that the column temperature is 20-30 degrees lower than the other two temperatures. When the temperature rises to the preset temperature, the second indicator light turns green. After the first indicator light turns green, open the hydrogen valve and the dry air valve, press the "DET" key, turn on the FID detector, and then ignite! ! !

As for using TCD detector, the steps are basically similar, please refer to the instruction manual for details! !