temperature sensor

WD-2PTtemperature sensor

Technical standards:

1.Transmission method:1+ 2-

2.Output method:0~100mA

3.Power supply:+5VDC

4.Accuracy standard:0.5%

5.Measurement range:-200450°

6.Inspection standards before installation: The integrated temperature transmitter should be clean, dry, and intact, with no rust on the terminal posts and adjustment screws, and good insulation on the connecting wires

Common faults and solutions:

1The indication value of the temperature instrument system suddenly changes to the maximum or minimum, usually indicating a fault in the instrument system. Due to the significant measurement lag of the temperature instrument system, there will be no sudden changes. At this time, the main causes of the malfunction are thermocouple, thermistor, compensation wire breakage, or transmitter failure.ａWhen indicating maximum running: water may enter the temperature measurement point, causing a short circuit in the power supply and resulting in maximum output; The insulation of the resistor to the ground is not good (use a multimeter to test)20MΩ档，>20MΩ is better);ｂThe minimum indication is mostly due to the temperature transmitter being faulty and not outputting.

2The temperature control instrument system indicates rapid oscillation, mostly due to control parametersPIDCaused by improper adjustment.

The temperature control instrument system shows significant and slow fluctuations, which are likely caused by changes in process operations. If there were no changes in process operations at the time, it is likely a fault in the instrument control system itselfCheck if the wiring terminals are loose.

WD-2PTtemperature sensor

Fault inspection:

1Firstly, check whether the wiring terminals are loose or rusted, and whether the measuring components are disconnected

2Check if the integrated temperature transmitter has good insulation to ground

3Check if the power supply voltage is stable

4Re verify that the integrated temperature transmitter meets the technical requirements