The QJ57E Resistance Kelvin Bridge is a self-contained portable DC Kelvin Bridge for high precision measurements of low resistance, conductivity and calibration of other instruments. It is totally self-contained so is suitable for laboratory, workshop and onsite, in the field, applications. The Portable Kelvin Bridge has a resistance range from 0.01μΩ to 1111.1Ω in seven ranges and an accuracy of ± 0.03%.
FEATURE
Kelvin bridge with built-in galvanometer
Four terminal measurement
Measurement range: 0~1.11110kΩ
Best resolution: 0.01 µΩ
Resistance elements made by high quality alloy material with low temperature coefficient
Wide measurement range, high accuracy, stability and reliability
Rugged carry case, suitable for both field and laboratory use
Battery powered, with input jack and terminals for optional external DC power source
With output terminals for external galvanometer
SPECIFICATION
Multiplier
Measurement Range
Resolution
Accur- (%)
Rn
Test Current
X10-3
0 ~ 1.11110 mΩ
10nΩ
2
1mΩ
3A
X10-2
0 ~ 11.1110 mΩ
100nΩ
0.2
10mΩ
1A
X10-1
0 ~ 111.110 mΩ
1uΩ
0.05
100mΩ
500mA
X1
0 ~ 1.11110 Ω
10uΩ
0.05
1 Ω
100mA
X10
0 ~ 11.1110 Ω
100uΩ
0.05
10 Ω
15 mA
X102
0 ~ 111.110 Ω
1mΩ
0.05
100 Ω
1.5 mA
X103
0 ~ 1.11110 kΩ
10mΩ
0.05
1kΩ
200uA
Accuracy: +/-Accuracy Index%(Rn/10 + dial reading) at reference temperature 20 Celus Degree and relative humidity 40% ~ 60%
External power supply is optional only for bridge. Galvanometer uses 2x9V battery.
Battery type:6 x 1.5V (LR20) and 2 x9V (6LR61)
External Power Input: 3VDC / 4.5A (Input from Jack), 1.5VDC/4.5A (Input from terminal)
Dimension: 314 x 276 x 167 mm
Weight: 4.5kg
APPLICATION NOTE
To measure transformer usually requires long measuring lead wire, the cross section of lead wise shall not be too small, i.e. the resistance of each conductor shall not be greater than 0.1Ω. In this case it is suggested to use special test lead set CD18C or CD19C (optional accessory available on request)
DQ-630 clamp device (optional accessory) is available for convenient measurement of resistance of wire and cable per meter.
