Compact Digital Resistivity Measurement Equipment Plastic 30x250x160 MM

Compact Digital Electric Bridge / Conductor Resistance Tester

1. Features

Measurement scope : 0.01 μΩ ~ 1.111 KΩ, in total 7 ranges. It is suitable to test low DC electricity resistance .

Low voice, low consume, high sensitivity

2. Main technical parameters

2.1 QJ57 according to GB3930-83 ,ZBY164-83

2.2 Main parameters: shown as table 1

Table 1

2.3 Error Range

Elim=±C%(RN/10+x)

Elim: error limit, RN: base data

C: Accuracy grade index X: counting dish data

2.4 Enviromental conditions

A Referency temperature: 20±0.5℃ Humidity: 40%~60%

B Standard temperature: 20±5℃ Humidity: 20%~75%

3. Setting device

A Mechanical and electrical setting device

B Damping time: less than 4 s

C Sensitivity: electrical resistance deviate one grade , setting device deviate more than 1 gride

D Voice:indicator shake less than 1/3 grid

E Setting device socket.in battery holder

Power: bridge R40 type 1.5V battery parallel, setting power : 6F22 type 9V battery , 1 piece

Dimension: 30mm×250mm×160mm

Weight: 6KG

4. Usage

4.1 Preparation

Prepare batteries, multiply rate agjust to“BV”and“GV”. Pre-heat for 5 minutes , adjust “setting device ” , indicator chimes 0.

4.2 Test

The electricity resistance be connected with C1, P1, P2, C2, the resistance between AB be to test .you should use conductor line whose resistance is less than 0.01Ω .

You should estimate the resistance and select multiply rate, counting dish, press “G”“B” to adjust counting dish, null indicator will be zero, at that time, the bridge is balanced.

Rx = multiply rate × counting dish

4.3 Counting dish: Chose proper multiplying power, and the left number should not be 0, round dot on the lower left of the first counting dish is radix point . “X” represent 10 .

4.4 Null indicator

You had better chose external power when you test low electrical resistance for long time. Power switch adjust to “B”. If you want much high sensitivity, you can chose advanced null indicator through G terminal, at the same time, you should put the swith direct to “G”.

5 Note

5.1 You should press “B” first , and then press“G” when test charged DC electrical resistance. you should press “G” first, and then press “B”.

5.2 You should twist four conductor line into one line. In order to enhance resistance to electromagnetism and magnetic field, earth line should connect with earth terminal.

5.3 “B” and “G” return, and multiplying power switch off after test, please take the batterier out when long time no use.

5.4 Storage: 5 ~ 35 ℃ , humidity: 25% ~ 80% .