Double Kelvin Digital DC Resistance Bridge

Uses

Model QJ57E is a portable precision DC double bridge. The instrument offers seven measuring ranges from 0 to 1.1111 kΩ, with a minimum resolution of 0.01 μΩ. It is suitable for precision measurement of low-value resistance or DC resistance in applications such as conductivity testing of metal conductors, DC current dividers, contact resistance of switches, wires and cables, motors, transformers, and more.

Features:

The bridge's main resistance elements are manufactured from high-grade alloy materials and have undergone long-term high and low temperature aging tests, as well as rigorous process treatment and adjustment. This ensures a low temperature coefficient, high accuracy, and excellent annual stability.

The bridge achieves low contact resistance with minimal variation. Using the JZ2B zero indicator, the bridge offers high sensitivity, low noise, and low power dissipation.

As a result, this portable bridge is characterized by a wide measurement range, high accuracy, excellent stability and reliability, as well as a compact and lightweight design.

Specifications

All technical indicators of Model QJ57E conform to the standard IEC 564-77 "DC Bridge for Measuring Resistance".

Environmental Conditions

a. Temperature:

Reference value: 20 ± 0.5 °C

Nominal value: 5 °C to 25 °C

b. Relative Humidity:

Reference value: 40% to 60%

Nominal value: 25% to 75%

Main parameters are shown in Table 1.

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