QJ57B Digital Display Resistance Tester is a new generation of resistance test equipment, it can realize the electric wire electric cable conductor dc resistance measurement, the motor winding dc resistance measurement, contact resistance measurements. Test instrument can automatically measure conversion conductor resistance and according to the environmental temperature conversion to 20 ℃,.Can be upgraded to replace QJ57, QJ44, and other traditional measuring equipment.
Tester can achieve wide range 1μΩ–250KΩaccuracy±0.5% of the resistance measurement. Resistance measurements using four terminal measurement method, automatic elimination of errors in contact resistance.
9 level measuring gear 7 level measuring current automatic conversion, automatically select the appropriate gear, automatic conversion temperature coefficient, do not need to manually choose, the measurement automatically saved.
1 mΩ–100KΩ9 level standard resistance calibration, ensure the accuracy of measurement.
Tester can offers from 0.01mA–2A multistage programmable constant current source output, absolute accuracy is better than that of 0.02% plus or minus 0-2.5 V voltage measurement.
Using DS18B20 temperature, can realize accuracy± 0.5 ℃ temperature measurement.
Automatic discharge protection, prevent equipment damage due to static shock in the process of wiring.
Tester offers a variety of work mode, The Resistance model is used for standard resistance; The WireCable model used in wire and cable conductor resistance; Constant current mode to provide constant current output; Calibration model used for instrument calibration.
Automatically save the test results, can inquire measuring resistance, environment temperature, the conversion as a result.
Adaptive AC100V–250V, 50/60 Hz power supply system.
Measure the cable conductor dc resistance, switch contact resistance, connectors, contact resistance.
constant current source, measure the voltage.
Resistance measurement: the measuring range: 1μΩ- 250kΩ