First, the features: 

 JH-JF4 Field, also known as on-site thermal calibrator calibrator, thermal calibrator, mainly for the industrial field instrumentation and thermal validation system designed to maintain, it offers sound and practical features, operation simple. Field calibrator using thermal chip as the CPU, the latest set of large-scale digital conversion integrated circuits and large-screen LCD technology, and with the output, measurement, manuals and 24VDC power distribution capability, and four functions can work simultaneously on the same screen display output and the measured values ??and the corresponding ITS-90 standard value (RTD and thermocouple). On-site thermal calibrator equipped with large capacity rechargeable battery, portable, easy to complete the industrial scene thermal instrumentation (sensors, transmitters, display instruments, control system) maintenance, calibration. 

 On-site thermal calibrator its use with the following characteristics: 

 ■ Small, portable and handheld. 

 ■ Rugged, reliable, on the back of the bracket and hook holes for field use. 

 ■ Large display, measuring the output can be displayed simultaneously. 

 ■ voltage, current, resistance measurement and voltage and current output. 

 ■ 8 thermocouple (K, E, T, J, S, R, N, B) measurement and output, two RTD (PT100, Cu50) measurements. 

 ■ thermocouple, thermal resistance measurement output with ITS-90 International Standard millivolt, resistance value corresponding to the display. 

 ■ Voltage and current measurements show the percentage. 

 ■ thermocouple output with automatic or manual compensation. 

 ■ output value of the input using a variety of ways. 

 ■ resistance can be achieved with the temperature, mV value and temperature value of fast peer review. 

 ■ Built-in high capacity rechargeable battery, charging time can work for 5-7 hours (associated with working conditions). 

 ■ large-screen LCD display with backlight, Chinese menu operation. 

 ■ Key Sound and light can be controlled, and can only boot to keep the last time the state of the last set. 

 Second, the technical parameters 

 2.1 DC input: 

 Measuring 

 Function 
 Range 
 Accuracy 

 DCV 
 0 ~ 35V 
 ± 0.1% FS 

 DCmV 
 0 ~ 100mV 
 ± 0.05% FS 

 DCmA 
 0 ~ 35mA 
 ± 0.05% FS 

 RTD 
 Two kinds 
 ± 0.1% FS 

 TC 
 K, T, E, J, N 
 ± 0.1% FS 

 R, S, B 
 ± 0.2% FS 

 F 
 0.0 ~ 5000Hz 
 ± 0.2Hz 



 2.2 DC output 

 Output 

 Function 
 Range 
 Accuracy 

 DCV 
 0 ~ 5V 
 ± 0.05% FS 

 DCmV 
 0 ~ 100mV 
 ± 0.05% FS 

 DcmA 
 0 ~ 24mA 
 ± 0.05% FS 

 TC 
 K, T, E, J, N 
 ± 0.1% FS 

 R, S, B 
 ± 0.2% FS 

 Hz 
 0 ~ 1000Hz 
 ± 1Hz 

 0 ~ 5.00KHz 
 ± 0.02KHz 



 2.3 Performance indicators: 

 Operating temperature: -10 ~ 50 ℃ 

 Storage temperature: -27 ~ 70 ℃ 

 Dimensions: 237 × 131 (95) × 45 mm