Compact Digital Electric Bridge / Conductor Resistance Tester
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
|Multiply rate||Range||Resolution||Accuracy grade index(C)||Referency resistance (RN)||Test electricity|
2.3 Error Range
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
Prepare batteries, multiply rate agjust to“BV”and“GV”. Pre-heat for
5 minutes , adjust “setting device ” , indicator chimes 0.
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”.
5.1 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% .