| Function | Earth resistance measurement, ground voltage measurement, low value
resistance measurement |
| power supply | DC 9V (6 LR14 1.5V alkaline dry batteries, 300 hours of continuous
standby) |
| Backlight | Controllable white screen backlight, suitable for dark places |
| measurement method | Precision three-wire measurement, simple two-wire measurement |
| Measurement methods | Grounding resistance: rated current pole changing method, measuring
current 3mA Max, 820Hz; |
| data schema | Voltage to ground: average value rectification |
| wire resistance check | Average, Maximum, Minimum |
| display mode | Avoid errors caused by the test wire not fully inserted into the
instrument interface or poor contact, or the user replaces the
extended test wire, etc., so that the grounding resistance
measurement is more accurate |
| Measurement instructions | 4-digit large LCD display, white screen backlight |
| LCD size | LED flashing indication during measurement, LCD countdown display |
| Meter size | 128mm×75mm; display area: 124mm×67mm |
| test line | Height, width and thickness: 215mm×190mm×95mm |
| Simple test lead | 3 strips: red 20m, yellow 10m, green 5m each |
| Auxiliary ground rod | 2 pieces: red 1.6m, green 1.6m each |
| measure time | 2 pieces: φ10mm×150mm |
| Number of measurements | Voltage to ground: about 3 times/second; grounding resistance:
about 5 seconds/time |
| line voltage | More than 5000 times |
| Communication Interface | (Measure 10Ω in 20Ω gear, measure 1 time, stop for 25 seconds and
then test again) |
| communication line | Measuring voltage to ground: measurement below AC 600V |
| data storage | With RS232 interface, software monitoring, storage data can be
uploaded to the computer, save and print |
| data retention | 1 RS232 communication line, 1.5m long |
| Data access | 400 groups, flashing "FULL" symbol indicates that the storage is
full |
| overflow display | Data hold function: "HOLD" symbol display |
| Alarm function | Data access function: "READ" symbol display |
| battery voltage | Overrange overflow function: "OL" symbol display |
| Power consumption | When the measured value exceeds the alarm setting value,
"beep--beep--beep--" alarm prompt |
| When the battery voltage drops to about 7.8V, the low battery
voltage symbol " " will be displayed to remind you to replace the
battery. |
| Backlight: 25mA Max |
| quality | Standby: 25mA Max (backlight off) |
| Measurement: 70mA Max (backlight off) |
| Meter: 1443g (including battery) |
| Test line: 847g (including simple test line) |
| Working temperature and humidity | Auxiliary ground rod: 468g (2 pieces) |
| Storage temperature and humidity | Gauge bag: 915g |
| Overload protection | -10ºC~40ºC; below 80%rh |
| Insulation resistance | -20ºC~60ºC; below 70%rh |
| Pressure resistance | Measuring ground resistance: AC 280V/3 seconds between E-P, E-C
ports |
| Electromagnetic properties | 10MΩ or more (500V between circuit and case) |
| Suitable for safety regulations | AC 3700V/rms (between circuit and case) |
