Digital earth ground resistance tester, also known as the three-wire grounding resistance tester, grounding resistance meter, etc., is a commonly used meter for measuring grounding resistance. It adopts a large LCD gray-white screen backlight display and microprocessor technology to meet the requirements of two-wire and three-wire test resistance. Suitable for telecommunications, electricity, meteorology, computer rooms, oil fields, power distribution lines, iron tower transmission lines, gas stations, factory grounding networks, lightning rods and so on. Instrument testing is precise, fast, simple, stable and reliable.
The digital grounding resistance tester is controlled by the microprocessor and can automatically detect the connection status of each interface and the interference voltage and interference frequency of the ground network, and has the function of testing the auxiliary grounding resistance value. At the same time store 500 sets of data, resistance measurement range: 0.01Ω ~ 3000Ω, grounding voltage range: 0.01 ~ 100.0V. Online monitoring data through monitoring software, USB data uploaded to PC and unique features such as intelligent alarm alert
The digital grounding resistance tester consists of host, monitoring software, test line, USB cable, and grounding rod. It has the functions of reading, checking, saving, reporting and printing of historical data.
Grounding Resistance Range | |
Grounding Resistance Resolution | 0.01Ω |
0.01～100.0V AC Accuracy ±1%rdg±3dgt | |
Grounding Voltage Resolution | 0.01V |
Baseline conditions | 23℃±5℃，below 75%rh (Auxiliary ground resistance 100Ω ± 5%, voltage to ground <10V) |
Function | Earth resistance measurement, ground voltage measurement, low value resistance measurement |
Power | 8.4V lithium battery (built-in) |
Backlight | Controllable gray screen backlight, suitable for use in dim places |
measurement mode | Precise three-wire measurement, simple two-wire measurement |
Measurement methods | Grounding resistance: rated current change pole method, test current > 20mA (sine wave), 128Hz； Ground Voltage: Average Rectification |
Test frequency | 128Hz |
Display mode | 4-bit large LCD display, gray screen backlight |
Measurement instructions | LED flashing indicator during measurement, LCD countdown display |
LCD size | 108mm×65mm |
Instrument size | L/W/H：277.2mm×227.5mm×153mm |
Test line length | |
Simple test line | 2strips：red 1.6m，green 1.6m each one |
Auxiliary Grounding rod | 2PCS：φ10mm×200mm |
Measure time | Ground voltage：about 2 times/sec; grounding resistance: about 5 seconds/time |
Measurement times | 5000 times or more |
Line voltage | Measuring grounding voltage : AC 600V or less |
USB interface | With USB interface, software monitoring, storage data can be uploaded to the computer, save and print |
Communication Line | One USB communication line, 1.5m long |
Data storage | 500 groups, flashing "FULL" symbol indicates that the memory is full |
Data review | Data review function: "MR" symbol display |
Overflow display | Over-range overflow function: "OL" symbol display |
Alarm function | Alarm when the measured value exceeds the alarm setting value |
Battery voltage | Real-time display of battery power, reminding timely charging when battery voltage is low |
Power consumption | Backlight：25mA Max |
Standby: 25mA Max(Backlight off) | |
measuring：70mA Max(Backlight off) | |
Weight | Instrument： 2397g(With batteries) |
Test lines：861.5g(Include simple test line) | |
Auxiliary grounding rod： 425g(2) | |
Instrument bag： 271g | |
Working temperature and humidity | -10℃～40℃；below 80%rh |
Storage temperature and humidity | -20℃～60℃；below 70%rh |
Overload protection | Grounding resistance：AC 280V/3 seconds between E-H and E-S ports |
Insulation resistance | |
Pressure resistance | AC 3700V/rms(between circuit and housing) |
Electromagnetic properties | IEC61010-4-3，Wireless frequency electromagnetic field≤1V/m |
Suitable for safety regulations | IEC61010-1、IEC1010-2-31、IEC61557-1,5、IEC60529(IP54)、Pollution level 2、CAT Ⅲ 300V |