First, characteristic:

　　The JG-JF4 scene hot working verification meter said that the scene verification meter, the hot working verification meter, is mainly designs for the industry scene thermal meter and system's verification maintenance, it provides the consummation, but practical function, simplicity of operator. The scene hot working verification meter uses the monolithic integrated circuit to take CPU, the collection is newest the large-scale digital conversion integrated circuit and the large screen liquid crystal display technology in a body, has the output, the survey, the handbook and the 24VDC power distribution function, and four functions may also work, with screen demonstration output and observed value as well as corresponding ITS-90 normal value (thermal resistance and thermo-element). The scene hot working verification meter and provides ultra large capacity may the rechargeable battery, carries conveniently, can complete the industry scene thermal meter conveniently (sensor, transmitting instrument, display instrument, control system) overhaul, verification.

The scene hot working verification meter it has the following handling characteristics:

■ ? Exquisite, is advantageous carries and grasps.

■ is firm, is reliable, the back carriage and hangs the dog hole to suit the field use.

■ the big display monitor, the survey, the output may also demonstrate.

■ voltage, electric current, resistance survey and voltage, electric current output.

■ 8 kind of thermo-elements (K, E, T, J, S, R, N, B) survey and output, 2 kind of thermal resistances (PT100, Cu50) survey.

■ to the thermo-element, the thermal resistance survey output has its-90 international standard millivolt, the resistance value correspondence demonstration.

■ the voltage and the current measurement may demonstrate the percentage.

■ the thermo-element survey, the output have automatic or the manual compensation function.

■ the value of exports input selects many kinds of methods.

■ may realize the resistance value and the temperature value, a millivolt value and the temperature value fast looks up mutually.

■ the built-in large capacity rechargeable battery, charges one time may the continuous working 5~7 hours (and working condition related).

■ the large screen fluid crystal zone back light demonstrated that Chinese menu operation.

■ the pressed key sound and the back light may control, and can only then each time starting when maintains condition which previous time establishes finally.

Second, technical parameter

2.1 cocurrent signal input:

2.2 cocurrent signal output

2.3 performance indices:

Operating temperature: -10~50 ℃

Storing temperature: -27~70 ℃

External dimensions: 237 * 131(95) * 45 mm