China Precision Portable Double DC Resistance Bridge (Kelvin Digital Bridge)

Product Description

China Precision Portable Double DC Resistance bridge (Kelvin Digital Bridge)

I.Introduction

1 1 Uses: Model QJ57E is a portable accuracy DC double bridge with Kelvin network ( hereinafter referred to as "Bridge"). The instrument is provided with seven measuring ranges from 0 ~ 1.1111k Ω and the minimum resolution is 0.01 u Ω . It is suitable for accuracy measurement of low-value resistance or DC resistance in the conductivity of metal conductor, DC current divider, the contact resistance of switch, wire and cable, motors and transformers, etc.

1. Features: The main resistance element of the bridge is made by high-grade alloy material, and subjected to long-term high and low temperature aging test, as well as rigid technological treatment and adjustment so as to lower the temperature coefficient, increase the accuracy and improve the annual stability. By adopting the specific switch in Fang Ke accuracy instrument, the contact resistance of the bridge is small and so does its variation; by using model JZ2B zero indicator, the bridge features high sensitivity, low noise and less power dissipation. Therefore, the portable bridge is characterized by wide measurement range, high accuracy, well stability and reliability, compact and lightweight
2. Specifications

1. All technical indicators of Model QJ57E conform to the standard IEC564 - 77" DC Bridge for Measuring Resistance".
2. Environment condition

1. Temperature:

Reference value: 20+0.5 C , nominal value" 5 °C-25 °C .

1. Relative humidity:

Reference value: 40%-60%, nominal value: 25% ~ 75%.

1. Main parameters are shown in Table 1.

Table 1

Multipe	Effective range	Resolution	Class index	Rn	Iman
x 10^-^3	0 -1.11110mΩ	10n Ω	2	1mΩ	3A
x 10^-2	0 -11.1110mΩ	100n Ω	0.2	10mΩ	1A
x 10^-^1	0 -111.110mΩ	1 µΩ	0.05	100mΩ	500 mA
x1	0 -1.1111Ω	10 µΩ	0.05	1 Ω	100mA
x 10	0 -11,1110mΩ	100 µΩ	0.05	10 Ω	15mA
x 10^2	0 -111.110mΩ	1mΩ	0.05	100 Ω	1.5mA
x 10^3	0 -1.11110 kΩ	10m Ω	0.05	1kΩ	200 µ A

 

Company Information

HuaZheng Electric Manufacturing (Baoding) Co.,Ltd is the supplier of the State Grid in China.It means we are the supplier of the Chinese Government.And our products spread throughout the whole China.

What's more, our customers come from different countries like America, England, Bulgaria, Brazil, Chile, Malysia, Vietnam and so on.

Our main products are Insulation Oil Tester, Cable Fault Locator, Power Quality Analyzer, High Voltage Generator, High Voltage Capacitor, Testing Transformer and so on.



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