Product Description

QJ42P Portable DC Double Resistance Bridge

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.

SCOPE OF DELIVERY

• QJ42P Portable DC Double Bridge
• Factory calibration report
• Test lead set  

OPTIONAL ACCESSORIES

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

ORDERING MODEL NUMBER

• Model QJ42P