Power supply

DC 7.4V 1.8Ah rechargeable lithium battery

Back light

Controllable white screen backlight, suitable for use in dark places

Measurement

Precision 4-wire, 3-wire method measurement, simple 2-wire method, selection method, double clamp method to measure grounding resistance

Measurement methods

Two, three and four wire method measurement: pole changing method, short circuit measurement current 20mA Max

Selection method measurement: pole changing method, short circuit measurement current 20mA Max

Double clamp method: non-contact mutual inductance measurement method, test current 1mA Max

Soil resistivity: quadrupole method (Wenner method)

DC resistance: pole changing method

AC current: average rectification (clamp)

Voltage to ground: average rectification (between P (S) -ES interface)

Range

Two, three, four wire method to measure grounding resistance (R): 0.000Ω ~ 30000Ω

Selection method to measure grounding resistance (Re): 0.00Ω ~ 3000Ω

Double clamp method to measure grounding resistance (Re): 0.01Ω ~ 200Ω

Double clamp method to measure grounding resistance (Re): 0.01Ω ~ 200Ω

Ground voltage (50Hz / 60Hz): AC 0.0 ~ 100.0V

Alternating current (50Hz / 60Hz): AC 0.00mA ~ 600.0A

Highest resolution

Two, three, four wire method to measure grounding resistance (Re), DC resistance:0.001Ω(0.000Ω~29.999Ω); 0.01Ω(30.00Ω~299.99Ω)

0.1Ω(300.0Ω~2999.9Ω);1Ω(3000Ω~30000Ω)

Selection method for measuring grounding resistance (Re):

0.01Ω(0.00Ω~29.99Ω);0.1Ω(30.0Ω~299.9Ω)

1Ω(300Ω~3000Ω)

Double clamp method to measure grounding resistance (Re):

0.01Ω(0.01Ω~0.99Ω);0.1Ω(1.0Ω~29.9Ω)

1Ω(30Ω~200Ω)

Soil resistivity (ρ):

0.01Ωm(0.00Ωm~99.99Ωm)

0.1Ωm(100.0Ωm~999.9Ωm)

1Ωm(1000Ωm~9999Ωm)

10Ωm(10.00kΩm ~99.99kΩm)

100Ωm(100.0kΩm~999.9kΩm)

1kΩm(1000kΩm~9000kΩm)

Ground voltage(50Hz/60Hz)： 0.1V

AC current(50Hz/60Hz)： 0.01mA

Precision

Two, three, four wire method to measure grounding resistance (Re), DC resistance (R-):

±2%rdg±0.05Ω (0.000Ω~29.999Ω)

±2%rdg±3dgt (30.00Ω~299.99Ω)

±2%rdg±3dgt (300.0Ω~2999.9Ω)

±4%rdg±3dgt (3.000kΩ~30.00kΩ)

Note: 1. Additional error at rC max or rP max≤±5%rdg±5dgt。(rC max:4kΩ+100R＜50kΩ, rP max:4kΩ+100R＜50kΩ)

2. Additional error at 5V interference voltage≤±5%rdg±5dgt

Selection method for measuring grounding resistance (Re):

±2%rdg±5dgt(0.00Ω~29.99Ω)

±2%rdg±3dgt(30.0Ω~299.9Ω)

±2%rdg±3dgt (300Ω~3000Ω)

Double clamp method to measure grounding resistance (Re):

±10%rdg±5dgt(0.01Ω~100Ω)

±20%rdg±5dgt(101Ω~200Ω)

Soil resistivity (ρ): according to the measurement accuracy of R

(ρ=2πaR a:1 m~100m；π=3.14)

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

AC current(50Hz/60Hz)： ±2%rdg±3dgt

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

Display mode

6-digit large LCD display with backlight

Measurement instructions

LED flashing indication during measurement, LCD countdown display

LCD size

128mm×75mm

LCD display

124mm×67mm

Size

Instrument size: length, width and height 320mm × 275mm × 145mm

Current clamp: length, width and height about 220mm × 100mm × 27mm

Package dimensions

Outer package: length, width and height about 400mm × 245mm × 335mm

Standard test line

Red 15m, Black 15m, Yellow 10m, Green 10m

Simple test line

2 bars: red 1.6m, black 1.6m

Auxiliary ground rod

4 piece：φ10mm×150mm

Current clamp

2 pcs: CT1 clamp red black plug, CT2 clamp blue black plug

Current clamp caliber

φ52mm

Current clamp caliber

1000：1

Current clamp lead

Length 2m

Measure time

AC current: about 2 times / second;

Ground voltage: about 2 times / second;

Ground resistance: 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 100V

Communication Interface

With USB interface, the stored data can be uploaded to the computer, save and print

Communication line

1 USB communication line, 1.5m long

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

Current clamp low current indication

When selecting the method or the double clamp method, when the current signal received by the CT2 clamp is lower than 0.5mA, the symbol "" is displayed. At this time, the clamp direction of the CT2 current clamp should be checked

Interference test

Automatically identify the interference signal, the interference voltage is higher than 5V "NOISE" symbol indication

Auxiliary ground test

With auxiliary earth resistance value 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)

Weight

Instrument: 2.66kg (including battery)

Total weight: 7.87kg (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

20MΩ or more (500V 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);

JJG366-2004 (ground resistance meter);

JJG1054-2009 (clamp ground resistance meter).