QJ31 type DC single double arm bridgeDetailed product description：

QJ31 type DC single double arm bridge

Description
QJ31 DC dual-purpose bridge with built-in transistor amplifier, ammeter, and working power supply Suitable for measuring DC resistance in industrial and mining enterprises, laboratory or workshop sites, and outdoor workplaces Used to measure the DC resistance, resistivity of metal conductors, wire resistance, DC shunt resistance, contact resistance of switches and electrical appliances, as well as winding resistance and temperature rise experiments of various motors and transformers within its range.

Main technical indicators

Range magnification		Effective range (Ω)	Accuracy (%)
Single arm bridge	×10	10-111.1	zero point one
	×100	100-1111
	×1000	1000-11110
	×10000	10000-111100	zero point two
	×100000	100000-1111000	zero point five
double bridge	×0.01	0.0001-0.1111	zero point one
	×0.1	0.001-1.111
	×1	0.01-11.11
	×10	0.1-111.1

1. Measurement range:
Single arm: 10 Ω -111000 Ω
Arms: 0.1m Ω -111.1 Ω
2. Accuracy: 0.1%
3. Power supply:
(1) The double arm bridge has a voltage of 1.5V (with an internal power supply of 1.5V and 3 parallel connected 1 dry batteries)
(2) The single arm bridge has a voltage range of 1.5~10.5V (consisting of 1 battery and 2 6F22 type 9V batteries connected in parallel)
(3) The power supply of the transistor amplification zero meter is 9V (2 parallel 6F22 batteries)
4. Dimensions: 300 × 250 × 160 (mm)
5. Mass: Approximately 4.5kg