| Functions | Ground resistance, ground voltage, low value resistance measurement |
| Power supply | DC 7.4V 1.8Ah rechargeable lithium battery, fully charged and
continuous use for about 8 hours |
| Back light | Controllable white screen backlight, suitable for use in dark
places |
| Measurement | Precision three-wire method and simple two-wire method for
measuring grounding resistance |
| Measurement methods | Two-three-wire method measurement: rated current changing pole
method |
| Voltage to ground: average rectification (between P-E interface) |
| Range | Grounding resistance: 0.000Ω ～ 3000Ω
Ground voltage: AC 0.0 ～ 100V (50Hz / 60Hz) |
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| Resolution | 0.001Ω; 0.1V |
| Accuracy | Ground resistance: ± 2% Rdg ± 0.05Ω (0 ~ 30Ω)
±2%Rdg±5dgt(30~3000Ω)
Note: 1. The auxiliary grounding resistance is 100Ω ± 5%, and the
ground voltage is＜5V
2. Additional error when the interference voltage is 5V≤ ± 5% Rdg ±
5dgt
Ground voltage: ± 2% Rdg ± 3dgt (50Hz / 60Hz) |
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| 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 |
| Display mode | 6-digit large LCD display |
| Measurement instructions | LED flashing indication during measurement, LCD countdown display |
| LCD size | 128mm×75mm |
| LCD Display | 124mm×67mm |
| Product size | Host size: about 320mm × 270mm × 145mm |
| Outer packaging size: 400mm × 245mm × 335mm |
| Test line | 3 bars: red 15m, yellow 10m, green 5m |
| Simple test line | 2 bars: red 1.6m, one black 1.6m |
| Auxiliary ground rod | 2 roots:Φ10mm×150mm |
| Measure time | 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 | AC measurement below 100V |
| Communication interface | With RS232 interface, the stored data can be uploaded to the
computer through the data software, saved and printed |
| Communication line | One RS232 communication line, 1.5m long |
| Data retention | "HOLD" symbol indicates when holding data |
| Data storage | 2000 groups, "MEM" storage instruction, the storage is full,
display "FULL" symbol |
| Data access | "READ" symbol indicates when checking data |
| Overflow display | "OL" symbol indication when over-range overflow |
| Interference test | Automatically identify the interference signal, and display "NOISE"
when the interference voltage is higher than 5V |
| Alarm function | When the measured value exceeds the alarm setting value,
"beep--beep--beep--" alarm prompt |
| Battery voltage | When the battery voltage drop is insufficient, the battery voltage
low symbol is displayed to remind the need for charging. |
| Automatic shut-down | Automatic shutdown after 15 minutes |
| Power consumption | Backlight: 25mA Max (separate backlight power consumption) |
| Standby: 25mA Max (the backlight turns off after turning on) |
| Measurement: 150mA Max (backlight off) |
| Weight | Instrument: 2.645kg (including battery) |
| Total weight: 5.95kg (including packaging) |
| Tool box | 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 | Measuring ground resistance: AC-280V / 3 seconds between C-E and
P-E ports |
| Insulation resistance | 20MΩ or more (500V between circuit and case) |
| Withstand | AC 3700V / Rms (between instrument panel and cabinet) |
| 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);
JJG366-2004 (Ground resistance meter) |
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