High-precision Intelligent Thermometer - High-precision Intelligent Thermometer

I. Product Description

24-bit AD converter. Resolution: 0.001℃.

Compatible sensor models: Thermocouple T, K, N, S; Thermal resistance PT100 Cold junction compensation method: Four-wire PT100

Model: JWT4100Z (or R) Z—Pt100, R—Thermocouple

Power supply: 220VAC/50～60Hz;

Communication: RS485 interface;

Sampling rate: 2 times/second;

Operating environment: Temperature 0～60℃; Humidity ≤60%RH;

Instrument single-unit accuracy: ±0.003℃.

Two、Features      

1. Thermocouple temperature measurement cold junction compensation method:

Four-wire PT100 is used for cold junction compensation. PT100 uses our company's patented integral sintered external winding ceramic platinum resistance (annual change rate ≤0.01℃)

2. Thermocouple temperature measurement cold junction compensation resistance measurement method:

Four-wire measurement, detection current passes through forward and reverse switching, taking the average of two measurements, eliminating the contact potential (i.e., thermoelectric potential) between leads and resistance, and the actual temperature coefficient of PT100 can be input into the instrument, ensuring measurement accuracy. Compensation accuracy within 0.01℃.

3. Compensation form and effect:

By using our company's unique thermocouple cold junction compensation mathematical model, the cold junction temperature can vary over a wide range. When the temperature gradient is less than 0.03℃/s, it does not affect the overall measurement value.

3. Purpose:

Suitable for occasions with large environmental temperature changes and high measurement accuracy requirements.

Suitable for long-distance temperature measurement, such as temperature measurement in kilometer-deep oil wells;

Suitable for surface temperature measurement. The thermocouple wire can be made very thin, with the thinnest T-type thermocouple at 0.15mm, minimizing heat dissipation effects and ensuring accuracy of surface temperature measurement.

Suitable for precision temperature measurement, such as sterilization cabinet temperature field verification, calibration furnace temperature field verification, heat treatment furnace temperature monitoring, long-distance precision measurement, etc.