A low-temperature thermocouple calibration device in the temperature range of 77-90k
A calibration device, thermocouple technology, applied in the direction of measuring devices, thermometers, measuring heat, etc., can solve the problems of repeatedly destroying the vacuum state, rearrangement, complicated operation, and non-reuse, so as to make up for the shortage of calibration technology and ensure cold storage. The effect of large quantity supply and calibration capability
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[0030] Below in conjunction with accompanying drawing, the present invention will be further described, and the low-temperature thermocouple thermometer calibrated in the liquid nitrogen flooding experiment is taken as a specific embodiment.
[0031] like Figure 1~4 As shown, the thermocouple calibration device of this embodiment includes: a vacuum pump 1, a first valve 2, a second valve 6, a top cover 5, a liquid injection port 4, an air outlet 7, a freezing point tank 8, a data acquisition instrument 9, Thermocouple to be calibrated 3, standard thermometer 10, constant temperature block 11, calibration platform 12, heat sink 13, vacuum chamber 14, liquid nitrogen tank 15, conical container 16, connecting rod 17, heat absorbing rod 18, limit piece 19, Thermocouple socket 20 and controllable heating wire 21.
[0032] like figure 1As shown, the thermocouple calibration device of this embodiment is divided into three chambers from outside to inside, which are vacuum chamber 1...
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