WR series power station specific thermocoupleDetailed product description：

1. Application
The WR series power station specific thermocouple is designed for power stations and can meet the temperature measurement needs of 300000, 600000 kW and other generator sets and auxiliary equipment. Directly measure the temperature of liquid, vapor, gas media, and solid surfaces within the range of -200 ° C to 800 ° C in various production processes.

2. Working principle
The electrodes of WR series power station specific thermocouples are composed of two different conductor materials. When there is a temperature difference between the measuring end and the reference end, a thermoelectric potential is generated, and the working instrument displays the temperature value corresponding to the thermoelectric potential.
Thermistor measures temperature by utilizing the characteristic that the resistance of a substance changes with temperature. When the resistance value changes, the working instrument displays the temperature value corresponding to the resistance value.

3. Main technical parameters
Product execution standards
IEC584
IEC751
IEC1515
JB/T18622-1997
JB/T8623-1997
GB/T16839-1997

4. Measurement range and tolerance

model	Dividing number	Tolerance Grade
		I		II
		Tolerance value	Temperature measurement range ° C	Tolerance value	Temperature measurement range ° C
WRN	K	±1.5°C	-40~+375	±2.5 °C	-40~+333
		±0.004ltl	375~1000	±0.0075 ltl	333~1200
WRM	N	±1.5°C	-40~+375	±2.5°C	-40~+333
		±0.004 ltl	375~1000	±0.0075 ltl	333~1200
WRE	E	±1.5°C	-40~+375	±1.5°C	-40~+333
		±0.004 ltl	375~800	±0.004 ltl	333~900
WRF	J	±1.5°C	-40~+375	±1.5°C	-40~+333
		±0.004 ltl	375~750	±0.004 ltl	333~750
WRC	T	±1.5°C	-40~+125	±1°C	-40~+133
		±0.004 ltl	125~350	±0.0075 ltl	133~350

5. Room temperature insulation resistance
The thermal resistance is tested at an ambient temperature of 15-35 ° C, relative humidity not exceeding 80%, and a test voltage of 10-100V (DC). The insulation resistance between the electrode and the outer sleeve is greater than 100M Ω.
The thermocouple is tested at an ambient temperature of 20 ± 15 ° C, relative humidity not exceeding 80%, and a test voltage of 500 ± 50V (DC). The insulation resistance between the electrode and the outer sleeve is greater than 1000 Ω m