JH-WZJ-T-type thermal automatic verification system is the latest developed the fourth generation of thermal automatic verification products. It is in the Windows environment, fully using the language of the Windows environment to develop the next generation of high-end computer system based on the core, together with imported high-precision digital multimeter, and low potential scan switch, power regulator and other form of monitoring and control system. Operator in the Chinese Win95 / Win98 / WinMe operating system easily with the mouse the whole process of operation, the computer system displays real-time test furnace (or tank, etc.) of the temperature curve, parameters such as temperature and test time. System is fully in accordance with national verification procedures for data processing, and can print a variety of record forms, test certificate, can retain the original records for future reference. System is fully implemented thermocouple and thermal resistance of the entire test process automation, namely: automatic temperature control, automatic test, automatic data processing, automatic print test results. So that the operator's labor intensity greatly reduced, and improved test quality of the work. This device also provides the system's certification program and data file management procedures, operator of the system certification and test results of the archive, retrieve and query more convenient. 

 Technical Specifications 

 Scanning switch parasitic potential ≤ 0.4 u V 
 The highest resolution measurement of the potential resolution of 0.1 u V 
 0.1m Ω maximum resistance measurement resolution 
 Accuracy of potential measurement uncertainty of ≤ 0.01% 
 Resistance measurement uncertainty ≤ 0.01% 
 Thermocouple test uncertainty ≤ 1.2 ℃ 
 (Including changes in second-class standard thermocouple was 0.7 ℃) 
 Thermal resistance test uncertainty ≤ 0.05 ℃ 
 Temperature stability of the thermocouple oven temperature changes after the certification process temperature ≤ 0.2 ℃ / min 
 After the process of constant thermal resistance test tank temperature ≤ 0.04 ℃ / min 
 Automatic cold junction compensation when the cold junction temperature (20 ± 10) ℃ range, the compensation error ≤ 0.2 ℃ 
 Test temperature thermocouple 300 ~ 1100 ℃ 
 Thermal resistance 0 ~ 300 ℃ (including temperature thermocouple) 
 Test count thermocouple support both test 1-5 
 1-5 Thermal resistance test sticks simultaneously, allowing at the same temperature thermal resistance for several groups of test points 
 A continuous test of thermocouple 4 
 RTD 3 
 Thermocouple test test time, under normal conditions about 30 minutes per Baidu 
 The working environment temperature 20 ℃ ± 3 ℃ 
 Relative humidity ≤ 75% 
 Power supply AC220V ± 10% 50 ± 1HZ 
 Require grounding resistance ≤ 4Ω 

 System hardware configuration 

 JH-WZJ-T thermal automatic verification system consists of high-precision digital multimeter, the main control box, SCR controller, computer system, the thermostat (furnace and tank test) and measurement wires and communication wires,