The installation of the thermal resistance points1

Thermal resistance of the product has good flexibility, high measurement precision, sensitivity, high reliability, easy operation, etc. Thermocouple are a lot of problems need to pay attention to, when installation should pay attention to temperature measuring accurate, safe and reliable and convenient maintenance, and shall not affect the equipment operation and production operations. Today is to introduce the specific installation what are the main points, hope that can help users better application products.

the installation of thermal resistance points

installation requirements

1, in order to make the measurement end of the thermal resistance and had good heat exchange between the measured medium, should choose the observation points, try to avoid the valve, elbow and pipe and equipment near the corner of installing heat resistance.

2, with a protection casing thermal resistance of heat transfer and heat loss, in order to reduce the measurement error, thermocouple and thermal resistance should have enough insert depth:

1) For thermal resistance temperature center fluid, usually should be measuring end is inserted into the pipe center ( Vertical or inclined installation) 。 As the current body of pipe diameter is 200 mm, the thermal resistance should choose insert depth 100 mm;

2) For high temperature and high pressure and high velocity of temperature measurement, Such as main steam temperature) , in order to reduce cases of fluid resistance and prevent cases break under the action of a fluid, can take protecting tube shallow inserted way or use hot shell heat resistance. Shallow inserted type thermal resistance to protect casing, and its depth into the steam pipe should be no less than 75 mm; Shell hot resistance standard into the depth of 100 mm.

3) If is need to measure the temperature of flue gas, although the flue is 4 m in diameter, thermal resistor insertion depth of 1 m.

4) When measuring the original insertion depth of more than 1 m, shall be installed vertically, as far as possible or add racks and protect casing.

installation note

1, the thermal resistance should be installed vertically in a horizontal or vertical piping as far as possible, when installation should be protect casing, to facilitate maintenance and replacement.

2, when the temperature measurement of the pipe, the length of the element should be in the center of the pipe line ( The protection tube insertion depth should be the half of pipe diameter) 。

3, moving coil temperature table when installation, hole size to fit, install to the beauty is generous.

4, high temperature using high temperature or high temperature compensation cable.

5, according to the different choice of different temperature measuring element. General measure temperature less than 400 ℃ when choosing thermal resistance.

6, reasonable wiring to aesthetics, whose hands pointing to correct.

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key words: thermal resistance, thermocouple, thermal resistance, platinum resistance, PT100, PT1000, pressure sensor and digital temperature sensor