| Function | Grounding resistance measurement, ground voltage measurement, low value resistance measurement |
| Power Supply | DC 9V zinc manganese dry battery R14S 1.5V 6 knots; can be continuous standby 300 hours |
| Measurement Method | Precision three-line measurement, simple two-wire measurement. |
| Way of measurement | Grounding resistance: rated current pole method, measuring current 3mA Max, 820Hz; ground voltage: the average rectifier. |
| Digital Mode | Average, maximum, minimum |
| Line resistance check | To avoid the test line is not fully inserted into the instrument interface or poor contact or the user to replace the extended test line caused by the error,
make the grounding resistance measurement more accurate. |
| Display Mode | 4 large LCD display, blue screen backlight, LCD size: 128mm × 75mm; display area: 124mm × 67mm. |
| Measurement instructions | LED flashing indicator in the measurement, LCD countdown display. |
| Grounding resistance | Range: 0.01Ω ~ 2000Ω; Resolution: 0.01Ω; Accuracy: ± 1% rdg ± 3dgt. |
| Grouding voltage | Range: 0 ~ 600V AC; Resolution: 1V; Accuracy: ± 1% rdg ± 3dgt |
| Volumn | 215mm×190mm×95mm |
| Test line length | red: 20m, yellow: 10m, green: 5m |
| Simple test line | red:1.6m, green:1.6m |
| Auxiliary ground bar | 2 root: φ10mm×150mm |
| Measurement time | Ground voltage: 3 times / sec; grounding resistance: 5 seconds / time. |
| The number of measurements | More than 5000 times (20Ω file measurement 10Ω, measured 1, stop 25 seconds and then test) |
| Line voltage | Measure the ground voltage: AC 600V below the measurement. |
| RS232 interface | With RS232 interface, software monitoring, storage data can upload the computer, save the print |
| Communication line | Line RS232, 1.5m long |
| Data storage | 400 group, flashing FULL symbol indicates that the memory is full. |
| Data retention | HOLD symbol display |
| Data access | READ symbol display |
| Overflow display | OL symbol display |
| Alarm function | When the measured value exceeds the alarm set value, the beep - beep - beep alarm message |
| Battery voltage | When the battery voltage drops to about 7.8V, the battery voltage low symbol +- is displayed to remind the replacement battery |
| Power consumption | Backlight: 25mA Max; Standby: 25mA Max (backlight off); Measurement: 70mA Max (backlight off) |
| Quality | 1443g (Include battery) |
| Working temperature and humidity | -10℃～40℃; ≦80%rh |
| Storage temperature and humidity | -20℃～60℃; ≦70%rh |
| Overload protection | Grounding resistance: E-P, E-C between the ports AC 280V / 3 seconds |
| Insulation resistance | 10MΩ or more (between the circuit and the shell 500V) |
| Pressure | AC 3700V / rms (between circuit and housing) |
| Electromagnetic properties | IEC61010-4-3, radio frequency electromagnetic field ≤ 1V / m |
| Suitable for safety regulations | IEC 61010-1, IEC1010-2-31, IEC61557-1,5, IEC60529 (IP54), pollution, etc. 2, CAT III 300V |
