LW-7303 Power up Back side Packaged Packaged




It is used for all kinds of grounding setting resistance measurement of electric power, communication, railway and industrial and mining enterprise, meantime, also can test the soil resistance and ground voltage, power frequency has the strong interference ability, high accuracy, no need hand regulation. It has the small volume, lighting weight and portable.



*Small volume, light weight

*Special linear constant current output, current output range can be up to 30 ~ 40 A

*Simple operation, key lock function

*Provide 5 set of memory set

*LCD display

*Test line impedance self zero correction, ensure accuracy of test results

*Resistance upper and lower limit set, intelligent alarm

*Provide remote PLC control interface


Parameter  7303 7304
Output cuurent  3.0~30.0 (A) 3.0~40.0 (A)
Output voltage  6V. MAX 8V. MAX
Output frequency  50 or 60 Hz, ±100 ppm
Output waveform Sine wave, distortion (THD) < 2%, Crest Factor (Crest Factor) = 1.3 ~ 1.5
Resistance setting range 0~510(mΩ) 0~120(mΩ) 0~600(mΩ) 0~200(mΩ) 0~150(mΩ)
Corresponding current output 3.0~10.0(A) 10.0~30.0(A) 3.0~10.0(A) 10.0~30.0(A) 30.0~40.0(A)
Resistance resolution 1 mΩ
Test time (s) 0, 0.5 – 999.9 (s) (0 = continuous)
Judgement accuracy ±(2% of setting +2 counts)
Voltage set  0.00~6.00 V 0.00~8.00 V
Test mode   four-wire measurement
Memory 5groups memory 
Key Lock To prevent any unauthorized operators arbitrarily changing the parameter 
Peripheral remote control, PLC interface Provide Pass, Fail, Processing remote monitoring signals and the TEST, STOP contact
Protection  Overload, Open circuit automatically cut off the output,light and buzzer alarm
Display  16 × 2  LCD display
Dimension (mm)/Weight (kg) 280*89*  370 / 10Kg