Importance

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Abstract

Disclosed is a power supply method for an intrinsically-safe gas chromatograph. The power supply method includes: converting an original single-circuit power supply mode in a gas chromatograph into a multi-circuit power supply mode, so as to respectively supply power for a temperature control circuit, a pressure control circuit, a signal acquisition circuit, a communication circuit, a heating wire, an air extracting pump, a solenoid valve and a proportional solenoid valve in the gas chromatograph, wherein power supplies in the multi-circuit power supply mode of the gas chromatograph are all independent power supplies, and are not associated with each other; the number of the power supplies of the multi-circuit power supply mode is greater than or equal to 2; each power supply in the multi-circuit power supply mode is a direct-current power supply, and the voltage of each direct-current power supply is DC5V-DC36V; and the temperature control circuit, the pressure control circuit, the signal acquisition circuit, the communication circuit, the heating wire, the air extracting pump, the solenoid valve and the proportional solenoid valve in the gas chromatograph are combined in different modes, and are correspondingly powered by a plurality of power supply circuits; and an output current of the independent power supply is less than or equal to 3 A.

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First Claim