Huazheng HZJD-470A Portable Digital Earth Ground Resistance Tester

Function: Ground resistance, ground voltage, low value resistance measurement

Power supply: DC 14.8V 2600mAh rechargeable lithium battery , the battery is fully Charged at about 16.8V

Backlight: Controllable white screen backlight, suitable for use in dark places

Measurement methods: Precise three-wire method and simple two-wire method to measure grounding resistance

Measurement methods: 

Earth resistance measurement: Rated current changing pole method

Voltage to ground: average value rectification (between PE interfaces)

Range:

Ground resistance: 0.000Ω～200KΩ

Ground voltage: AC 0.000V～600V (50Hz/60Hz)

Resolution: 0.001Ω ; 0.005V

Precision

Ground resistance: ±2%rdg±5dgt

Note: 

Auxiliary connection Rc: 500Ω~1000Ω error≤±5dgt

Auxiliary connection Rp: 500Ω~10KΩ error≤±3dgt

When the interference voltage is 5V, the additional error is ≤±5%rdg± 5dgt

Ground voltage: ±2%rdg±3dgt (50Hz/60Hz)

Test voltage waveform: Sine wave

Test frequency:700Hz

Test current:

0.000Ω~100.0Ω range: about 20mA constant current

100Ω~200.0KΩ range: about 0.1mA constant current

Open circuit test voltage: AC 40Vmax

Product Size:

Meter size: length, width and height 258mm×215mm×83mm

Package size: 270mm*160mm*250mm

Test line: 3 pieces: red 15m, yellow 10m, green 5m each

Simple test line: 2 pieces: 1 piece of red 1.6m and 1 piece of green 1.6m

 Auxiliary ground rod: 2 pieces: φ 10mm×200mm

Measure time: Ground voltage: about 2 times/second; ground resistance: about 5 seconds/time

Measurement times: More than 5000 times (short circuit test, test once, stop for 30 seconds and test again)

Line voltage: Measured below AC 600V