Intelligent fully automatic digital AC/DC bridge QJ57B-1A type

(with temperature compensation)

Product Overview:

The QJ57B-1A digital bridge is a new generation of testing instrument for DC resistance of wires and cables, copper bars, aluminum bars, etc. It is an updated product of QJ44 and QJ57. The bridge adopts a 5-inch LCD display, with intuitive readings, manual and automatic range operation, high measurement accuracy, and good stability. This bridge adopts AC/DC power supply and is an essential testing instrument for outdoor cable reels. This bridge has the function of measuring temperature and can directly convert the resistance value to 20 ℃. Given the known resistivity, the length of the entire cable reel can be calculated. Equipped with a USB interface for external storage, the network port communicates with the computer. The technical performance of this bridge meets the GB/T3048.4 conductor DC resistance test standard.

Technical indicators:

1. Operating environment

a) Reference conditions: temperature 20 ℃± 0.5 ℃, relative humidity 40% -60% (laboratory requirements for testing)

b) Nominal conditions: Temperature 10-30 ℃

Relative humidity 25% -75% (on-site environment)

2. Power supply: AC220V ± 10% 50HZ ± 2 or DC9V/2A portable power supply

3. Platinum resistance temperature probe: range 0-50 ℃, accuracy ± 1 ℃, resolution 0.1 ℃