The QJ42P is a low cost portable dc double resistance bridge for low resistance measurement below 11Ω. This bridge can be used in the measurement of conductivity of metals, the d.c resistance of coils of generators and transformers, and the contact resistance of electric brushes, relays and switches.
FEATURE
Low cost solution
Kelvin bridge with built-in galvanometer
Measurement range: 0. 0001-11.00Ω
Best resolution: 5 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
Range: 0.0001Ω to 11Ω
Accuracy: ± 1 units
Galvanometer: Built in
Galvanometer Sensitivity: 2 μA/mm
Galvanometer Power: 2 x 6F22 9V battery
Bridge Power: Built in Dry cells 6 x 1.5V
Dimensions: 230 x 200 x 140 mm
Weight: Approximately 6kg
Accuracy level:
Multiplier
Measurement Range
Resolution
Accu-racy
Current
X10-4
0.100~1.100 mΩ
5uΩ
5%
4.4A
X10-3
1.00 ~ 11.00 mΩ
50uΩ
5%
4.4A
X10-2
10.0 ~ 110.0 mΩ
500uΩ
2%
3.3A
X10-1
0.100 ~ 1.10 Ω
5mΩ
2%
1A
X1
1.00 ~ 11.00 Ω
50mΩ
2%
140mA
APPLICATION NOTE
DQ-630 clamp device (optional accessory) is available for convenient measurement of resistance of wire and cable per meter.
Long measuring test lead: 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. ( P/N: CD19C)
