QJ57A DC digital resistance testerDetailed product description：

Purpose:

The QJ57A DC digital resistance tester is a 4-digit semi portable digital instrument composed of CMOS large-scale integrated circuits, and its measurement results are displayed using a 5-digit LED. This instrument has the characteristics of low price, high measurement accuracy, stable performance, and easy use. It is suitable for measuring the resistance of wires and cables, various coils, motors, and transformer windings. It can also be used for voltage measurement of 1uV-2V. Therefore, this instrument is widely used in workplaces and laboratories of factories and research institutions.

range	measurement range	resolution	Basic error
2mΩ	1.9999mΩ	0.1μΩ	Positive or negative 0.3%
20mΩ	19.999mΩ	1μΩ	± (0.05% reading value ± 3 words) ± (0.05% reading value ± 2 words)
200mΩ	199.99mΩ	10μΩ
2Ω	1.9999Ω	100μΩ
20Ω	19.999Ω	1mΩ
200Ω	199.99Ω	10mΩ
2kΩ	1.9999kΩ	100mΩ

Replacement - is an updated product of the original pointer QJ57 DC resistance bridge. Compared with the original pointer QJ57 DC resistance bridge, it has the advantages of wider range, higher accuracy, convenient use, and reasonable price, which changes the shortcomings of low sensitivity and poor resolution in measuring small resistance of the pointer QJ57. QJ57A (range 2m Ω -2K Ω) has a wide range (seven levels of range) and can cover SB2230 (range 20m Ω -2K Ω).