| Functions | Ground resistance, soil resistivity test; ground voltage, AC
voltage test |
| Power supply | DC 7.4V 1.8Ah rechargeable lithium battery, the battery is about
8.4V |
| Backlight | Controllable white screen backlight, suitable for use in dark
places |
| Measurement | Precision 4-wire, 3-wire method measurement, simple 2-wire
measurement of grounding resistance |
| Measurement method | Grounding resistance: rated current changing pole method, measuring
current 20mA Max |
| Soil resistivity: quadrupole method (Wenner method) |
| Voltage to ground: average rectification (between P (S) -ES
interface) |
| Range | Two, three, four wire method to measure grounding resistance (R):
0.000Ω ～ 300,000Ω |
| Soil resistivity (Ρ): 0.00Ωm～9000kΩm |
| Ground voltage: AC 0.0～100.0V |
| Precision | Two, three, four wire method to measure grounding resistance (R): ± 2% Rdg ± 5dgt (0.000Ω～29.999Ω) ± 2% Rdg ± 3dgt (30.00Ω～2999.9Ω) ± 4% Rdg ± 3dgt (3000Ω～300000Ω) |
| Soil resistivity (Ρ): according to the measurement accuracy of R
(Ρ=2πaR A: 1 M～100m; Π=3.14) |
| Ground voltage: ± 2% Rdg ± 3dgt |
Note: 1. The additional error when RC Max or RP Max is ≤ ± 5% Rdg ±
5dgt. (RC Max: 4kΩ + 100R＜50kΩ, RP Max: 4kΩ + 100R＜50kΩ) 2. Additional error at 5V interference voltage ≤ ± 5% Rdg ± 5dgt. |
| Test voltage waveform | Sine wave |
| Test frequency | 128Hz/111Hz/105Hz/94Hz (automatic frequency selection) |
| Short circuit test current | AC 20mA Max |
| Open circuit test voltage | AC 40V Max |
| Electrode spacing | 1m～100m |
Gear shift | Grounding resistance: 0.000Ω～300,000Ω automatic gear shift |
| Soil resistivity: 0.00Ωm ～ 9000kΩm automatic gear shift |
| LCD | 6-digit LCD display, white screen backlight |
| LCD size | 128mm × 75mm |
| LCD display field | 124mm × 67mm |
| Measurement instructions | LED flashing indication during measurement, LCD countdown, progress
bar graph indication |
| Charging instructions | The indicator light on the charger lights red when charging, and
lights green when fully charged |
| Size | Instrument size: length, width and height 320mm×275mm×145mm |
| Outer packing size: 400mm×245mm×335mm |
| Standard test line | 4 bars: red 15m, black 15m, yellow 10m, green 10m each |
| Simple test line | 2 bars: red 1.6m, one black 1.6m each |
| Auxiliary ground rod | 4 pieces: Φ10mm×150mm |
| Measure time | Ground voltage: about 2 times/second; ground resistance: about 7
seconds/time; soil resistivity: about 7 seconds/time |
| Measurement times | More than 5000 times (short circuit test, test once, stop for 30
seconds and then test) |
| Line voltage | Measurement below AC 600V |
| Communication Interface | With RS232 interface, the stored data can be uploaded to the
computer, saved and printed |
| Communication line | RS232 communication line, 1.5m 1 piece |
| Data retention | "HOLD" symbol indicates when holding data |
| Data storage | 2000 groups, "MEM" storage indication, display "FULL" indicates
that the storage is full |
| Data access | "READ" symbol indicates when checking data |
| Overflow display | "OL" symbol indication when over-range overflow |
| Interference test | Automatically identify the interference signal, the interference
voltage is higher than 5V "NOISE" symbol indication |
| Auxiliary ground test | With auxiliary earth resistance test function, 0.00kΩ～30.00kΩ (100R
+ RC <50kΩ, 100R + RP <50kΩ) |
| Alarm function | When the measured value exceeds the alarm setting value,
"beep--beep--beep--" alarm prompt |
| Battery voltage | When the battery voltage is insufficient, the battery voltage low
symbol is displayed to remind the battery to charge. |
| Automatic shut-down | Automatic shutdown after 15 minutes |
| Working current | Standby: 25mA Max (backlight off); |
| Backlight: 25mA Max (separate backlight power consumption); |
| When measuring: 150mA Max (backlight off) |
| Quality | Instrument: 2.66kg (including battery) |
| Total mass: 6.88kg (including packaging) |
| Tool box | Special toolbox design, can bear 200kg |
| Working temperature and humidity | -10 ℃～40 ℃; below 80% Rh |
| Storage temperature and humidity | -20 ℃～60 ℃; below 70% Rh |
| Overload protection | Measurement of grounding resistance: AC 280V/3 seconds between C
(H) -E, P (S) -ES ports |
| Insulation resistance | 20MΩ or more (500V between circuit and case) |
| Withstand | AC 3700V / Rms(between circuit and case) |
| Electromagnetic characteristics | IEC61326(EMC) |
| Suitable for safety regulations | IEC61010-1 (CAT Ⅲ 300V, CAT IV 150V, pollution degree 2); |
| IEC61010-031; IEC61557-1 (ground resistance); IEC61557-5 (soil
resistivity); JJG 366-2004 (ground resistance meter) |
