Overview:
Thermal resistance is usually used in conjunction with display meters, recording meters, and electronic computers. Direct measurement of liquid, vapor, and gaseous media, and solid surface temperatures in the 0 to 500°C range where hydrocarbons and other explosives are present at the production site.
1, pressure spring type temperature sensor, good seismic performance 2, large measuring range 3, imported thin film resistor components, reliable and stable performance.
select:
When selecting the thermal resistance, the user must consider several factors, and choose according to the measurement accuracy: Select the thermal resistance for higher accuracy, and select the thermocouple for low accuracy; Select according to the measurement range: General reference for the measurement of the thermocouple "Temperature and thermal resistance are commonly measured as the average spatial temperature; 2-wire thermal resistance wiring is simple, but it requires additional errors in the lead resistance. Therefore, it is not suitable for manufacturing A-grade precision thermal resistors, and when used, lead wires and The wire should not be too long. The wire system can eliminate the influence of the wire resistance, and the measurement accuracy is higher than the 2-wire system. As the process detection element, it is the most widely used. The wire system can not only eliminate the influence of the wire resistance, but also connect the resistance value of the wire. At the same time, it can also eliminate the impact of the resistance. In the high-precision measurement, to use 4-wire system. According to the temperature range selection: 500 °C above the general choice of thermocouple, 500 °C below the general choice of thermal resistance.
installation:
1. The size of the thermocouple and thermal resistance thread should be measured first, and the thread seat should be well.
2. According to the thread seat diameter, in the need to measure the hole in the pipe.
3. The welding of the thread seat. Insert the thread seat into the opened hole and weld the thread seat to the pipe to be measured.
4. Screw a thermocouple or thermal resistor into the welded socket.
5. Wire the junction box of the thermocouple or RTD according to the wiring diagram and connect it to the corresponding display meter on the dial. Note that the terminal box must not be in contact with the pipe wall of the measured medium pipe, and the temperature in the terminal box must not exceed 0-100°C. The outlet hole of the terminal box should be installed downwards to prevent the terminal blocks from being deposited due to poor sealing, moisture dust, etc. Short circuit.
6. The location of thermocouple terminal installation should be considered for ease of maintenance and maintenance.
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