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March  28 , 2024  Thursday
Home> temperature meter >> checking unit >> WJT-304 Automatic Testing Device of Thermal Resistance
  • Product number:MC-000018002522
  • Product name:Automatic Testing Device of Thermal Resistance
  • Product Type:WJT-304
  • Product nameplate:SAIC
  • Project Category:temperature meter >> checking unit >>
  • Manufacturer:Shanghai Automation Instrumentation Co., Ltd.
  • Sales unit: Shanghai Automation Instrumentation Marketing Center
  • Information download:Click to enter the download page  
  • Introduction
  • Specifications
WJT-304 is the latest product which uses computer new technology. It is easy to operate and clear for man-machine dialogue.
The testing and detecting of this device is used potentiometer testing and comparison method that is direct compare standard resistance, second-class standard platinum resistance with tested thermal resistance. As the key component of this device use high stability, digital voltmeter, standard resistor, current source, etc. and use special technical measures, it is ensure the accuracy of the system is not less than 0.005.
Working condition
The temperature to ensure accuracy:20±2℃
Ambient temperature: 12~28℃
RH:   30~80﹪
Atmosphere pressure:   94~109Kpa
Power supply:     220V AC±1﹪ 50HZ±1﹪
Dimension and weight:
Computer Measurement System:L×D×H 140×70×120cm,weight:70Kg
0℃ and 100℃ temperature source:L×D×H 70×50×80 cm,weight:30 Kg
Device composition:
Computer::It is domestic brands of Pentium machine or other brand of the same class.
High precision digital multimeter:Six semi-digital multimeter
a. resolution:0.1mV
b. accuracy:±0.005﹪reading±0.0035﹪range
control platform:
it is compose of working platform and control box。
Control box includes constant current source components, switch parts, DC power supply, and standard resistance, such as second-class standard platinum resistance
printer:24 needle printer
0℃ temperature resource:It is composed of mixer and freezing.
100℃temperature resource:It is composed of boiling point of water tanks, heating elements and Thermometer etc.
100℃ temperature error:Deviate 100℃<=±2℃
100℃ temperature stability:temperature change ≤0.04℃ every 10 minutes
100℃ Temperature field uniformity:Max. level differential temperature ≤0.01℃
Accuracy grade:0.005 grades
Pieces of tested thermal resistor:1~4 pieces