Active Member
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[China]
Address: 806, No.24 Nanlian Road, Nanlian Community, Longgang Street, Longgang District, Shenzhen City, 518116 China
Contact name:William Wang
HAOMAI ELECTRIC TEST EQUIPMENT CO.,LTD |
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Earth Resistance Clamp Tester
Model: GRT-100
The GRT-100 is a new generation earth clamp-on resistance tester. The instrument induces a test current into earth systems and measure ground resistance in multi ground installations without needing to disconnect the ground. It offers advanced features, simple operation and CAT Ⅲ 300V safety protection.
The elliptical shaped head design offers improved access to cables and earth straps in space constrained locations. The clamp head accommodates up to 32mm diameter cable and 55mm earth tapes making them suitable for use in power stations, substations, towers and many more facilities. The operation in dark and restricted areas is facilitated by a display with backlight and an audible tone associated with the hold key.
The GRT-100 offers 500 test results storage on-board and on-screen recall, also supports a download of results via USB interface.
Technical Data
| Function | Ground resistance test, loop resistance test, leakage current test, ground voltage test | ||
| Range | Ground resistance: 0.01Ω-1200Ω | Resolution: 0.001Ω | Accuracy: ±1%±0.01Ω |
| Current: 0.00mA-40.0A | Resolution: 0.01mA | Accuracy: ±2%±1mA | |
| Ground voltage: 0.0V-100V | |||
| Temperature/Humidity | 23℃±5℃,below 75% RH | ||
| Power Supply | DC 6V(4 alkaline dry batteries #5) | ||
| Measurement Method | Mutual induction | ||
| Clamp Diameter | 55mm×32mm | ||
| Clock Function | Available | ||
| Ω + A Synchronous Display | Ω + A same screen display | ||
| Display Mode | 4-digit LCD display, black screen design | ||
| LCD Dimension | 46mm×29mm | ||
| Dimension of Tester | 285mm×85mm×58mm(LxWxH) | ||
| Sampling Speed | 2 times/second | ||
| USB Interface | With USB interface, software monitoring, storage data can be uploaded to the computer for saving or printing. | ||
| Communication Cable | 1 pc communication cable | ||
| Data Storage | 500 groups, "MEM" storage indication, display "FULL" symbol indicates that the storage is full. | ||
| Data Review | "MR" symbol indicates when reviewing data | ||
| Overflow Indicate | The "OL" symbol indicates when the range overflows | ||
| Interference Test | Automatic identification of interference signal, when the interference current is large "NOISE" symbol indicates. | ||
| Alarm Function | When the measured value exceeds the alarm set value, an alarm will be given. | ||
| Battery Voltage | Real-time display of battery power, low battery remind timely charging | ||
| Automatic Shutdown | "APO" indicates that it will automatically shut down after 5 minutes. | ||
| Power Consumption | 50mA Max | ||
| Weight | 1180g (with battery) | ||
| Working Temperature / Humidity | -10℃～40℃, below 80% RH | ||
| Storage Temperature / Humidity | -20℃～60℃, below 70% RH | ||
| Insulation Resistance | Above 20MΩ(500V between circuit and shell) | ||
| Withstand Voltage | AC 3700V/rms(between circuit and shell) | ||
| External Magnetic Field | ＜40A/m | ||
| External Electric Field | ＜1V/m | ||
| Suitable for Safety Regulations | IEC61010-1(CAT Ⅲ 300V, CAT IV 150V, Pollution Degree II)； IEC61010-031； IEC61557-1(ground resistance) | ||
The Earth Resistance Clamp Tester is particularly suitable for measuring earth resistance in various installations such as buildings, pylons and RF transmitter sites without system disconnection. In addition, they can be used for the inspection and verification of lightning protection systems and virtually any installation where a current loop can be generated.
