| Function |
measure ground resistance by four-wire, three-wire or two-wire method, measure soil resistivity, measure ground voltage and AC voltage |
| Ambient temperature and humidity |
23℃±5℃, 75%rh below |
| Power supply |
DC 6V/4.5Ah lead-acid battery, last more than 100 hours for standby |
| Interference voltage |
<20V (should be avoided) |
| Interference current |
<2A (should be avoided) |
| Electrode spacing during R measurement |
a＞5d |
| Electrode spacing during ρ measurement |
a＞20h |
| Auxiliary ground impedance |
reference condition <100Ω, working condition <5kΩ |
| Measurement Range |
Ground resistance: 0.00Ω~30.00kΩ |
| Soil resistivity: 0.00Ωm~9999kΩm |
| Ground voltage: 0.00V~100.0V |
| Measurement mode |
Precise four-wire or three-wire measurement, simple two-wire measurement |
| Measurement method |
Ground resistance: rated current and pole changing method
Soil resistivity: four-pole method
Ground voltage: average rectification(S-ES between interface)
|
| Test frequency |
128Hz |
| Short circuit test current |
> 20mA (sine wave) |
| Open circuit test voltage |
AC 28V max. |
| Electrode spacing range |
1m~100m can be set |
| Gear change |
Ground resistance: fully automatic shifting 0.00Ω~30.00kΩ |
| Soil resistivity: fully automatic shifting 0.00 Ωm~9999kΩm |
| Backlight |
controllable gray screen backlight, suitable for use in dim places |
| Display mode |
4-bit large LCD display, gray screen backlight |
| Measurement instructions |
LED flashing indicator during measurement |
| LCD size |
111mm×68mm |
| LCD display field |
108mm×65mm |
| Instrument dimensions |
LxWxH: 277.2mm×227.5mm×153mm |
| Standard test leads |
4 pcs: red 15m, black 15m, yellow 10m, green 10m |
| Simple test leads |
2 pcs: yellow 1.6m, green 1.6m |
| Auxiliary Ground rod |
4 pcs: φ10mm×200mm |
| Measuring time |
Ground voltage: about 3 times/sec. |
| Ground resistance / soil resistivity: about 7 sec./time |
| Line voltage |
Measurement below AC100V (ground voltage measurement function can not be used to measure commercial power) |
| USB interface |
With USB interface, software monitoring, storage data can be uploaded to the computer for saving and printing. |
| Communication cable |
1 pc USB communication cable, length: 1.5m |
| Data storage |
500 data set. "MEM" is storage indicator, "FULL" symbol indicates that the memory is full. |
| Data query |
"MR" symbol appears |
| Overflow display |
Over-range overflow function: "OL" symbol appears. |
| Interference test |
Automatic identification of interference signals. "NOISE" symbol indicates when the interference voltage is higher than 5V. |
| Auxiliary ground test |
With auxiliary ground impedance test function, 0.00KΩ ~ 30kΩ (Rh max = 3kΩ +100R <50kΩ, Rs max = 3kΩ +100R <50kΩ) |
| Alarm function |
Give alarm when the measured value exceeds the alarm setting value |
| Battery voltage |
Real-time display of battery power, reminding timely charging when battery voltage is low. |
| Automatic Shutdown |
“APO” symbol appears, automatic shutdown after 15 minutes |
| Power consumption |
Standby: 40mA(backlight off) |
| Turn on backlight: about 43mA |
| Working: 75mA(backlight off) |
| Weight |
Instrument: 2.45 kg(including battery) |
| Test leads:1.3 kg |
| Auxiliary ground rod: 0.85 kg(4pcs) |
| Working temperature and humidity |
-10℃～40℃, 80%rh below |
| Storage temperature and humidity |
-20℃～60℃, 70%rh below |
| Overload protection |
Ground impedance measurement: AC 280V/3 seconds between H-E and S-ES ports |
| Insulation test |
20MΩ above(500V between circuit and case) |
| Withstand voltage |
AC 3700V/rms(between circuit and case) |
| EMC |
IEC61326 |
| Safety |
IEC61010-1(CAT Ⅲ 300V, CAT IV 150V, pollution level 2)
IEC61010-031
IEC61557-1(ground impedance)
IEC61557-5(soil resistivity)
JJG 366-2004
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