Product Description

QJ57P Portable Precision DC Kelvin Bridge

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.

SCOPE OF DELIVERY

• QJ57 Portable Precision DC Kelvin Bridge
• Factory calibration report
• Test lead set  

OPTIONAL ACCESSORIES

• Accredited calibration certificate (P/N: 9000-QJ57)

ORDERING MODEL NUMBER

• Model QJ57P