T-3720 40A Leakage current EARTH RESISTANCE CLAMP TESTER
T-3720 earth resistance clamp tester is a ground resistance measurement instrument. It uses a new generation of LCD black screen backlight display and microprocessor technology. Ω+A synchronously displays the grounding resistance by induction. It does not need to measure the grounding system in the loop. It is safe and fast to disconnect the earthing lead off line without auxiliary electrodes. It is widely used in telecommunications, electric power, meteorology, engine room, oil field, power distribution line, tower transmission line, gas station, factory grounding grid, lightning rod and so on. The instrument has the characteristics of accurate, fast, simple, stable and reliable.
T-3720 earth clamp tester is controlled by microprocessor, accurate detection of earth resistance, leakage current. It uses fast filtering technology to minimize interference. At the same time, 500 groups of data can be stored. It can monitor data online through monitoring software, upload USB data to PC, and have unique functions such as numerical maintenance and intelligent alarm prompt. This model T-3720 earth resistance clamp meters are 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.
APPLICATION
Universities;
Power plant;
Oil gas company;
Research institutes;
Electrical laboratory;
Electrical testing center;
Communication company;
Railway electrical department;
Electrical equipment manufacturers;
Electricity power bureau & power company;
Power engineering commissioning company;
Electrical Department of industrial and mining enterprises
FUNCTION & FEATURES
500 group storage;
Ω+ A screen display;
User friendly operation;
Quick self-test function;
Testing loop resistance;
Testing leakage current;
Testing earth resistance;
Real time clock function;
Resistance range 0.01-1200Ω;
Panel operation with 6 buttons;
This new design for clamp long life;
This new black screen design, high-end luxury;
This isolation USB technology, safe and reliable;
Using fast filtering technology, strong anti-interference ability;
PARAMETERS
| Electrical parameters |
| Model |
T-3720, including USB & clock function; 0-1200Ω, 0-20A
T-3720A, including USB & clock function; 0-1500Ω, 0-40A
T-3720B, Price is cheap, function simply, 0-500Ω |
| Power Supply |
6VDC 4 PCS of AA Alkaline LR6 batteries |
| Resistance Range |
0.01-1500Ω; 0.01-1200Ω; 0.01-500Ω |
| Resistance Resolution |
0.001Ω |
| Resistance Accuracy |
±1%±0.01Ω |
| Current Range |
0.00mA-20.0A; 0.00mA-40.0A |
| Current Resolution |
0.05mA |
| Current Accuracy |
±2.5%±1mA |
| Data memory |
500 Sets |
| Alarm Threshold Setting Range |
Resistance: 1-199Ω |
| Setting Range of Current Alarm Critical Value |
1mA -499mA |
| LCD Screen |
4 Digits Black LCD display, Screen L×W: 47mm×28.5mm |
| Clamp Size |
55mm×32mm |
| Clamp Opening |
32mm |
| Protection Level |
Dual Insulation |
| Structural Feature |
Clamp CT |
| Shifting |
Automatic shifting |
| External magnetic field |
<40A/m |
| External electrical field |
<1V/m |
| Single measurement time |
0.5 second |
| Resistance measurement frequency |
>1KHz |
| Measured current frequency |
50/60Hz Automatic measurement |
| Power Consumption |
Max 50mA either in booting up or normally working, Continuously working for 30 hours |
| Safety Standard |
IEC/EN61010-1; IEC1010-2-032; Pollution level 2, CAT IV(600V)
IEC/EN61557-5, 13, 16; IEC61326 |
| Communication port |
USB port |
| Mechanical parameters |
| Dimensions (L×W×T) (mm) |
285mm×85mm×58mm |
| Weight (kg) |
1.18 (With batteries) |
| Environmental conditions |
| Operating temperature |
-10°C to +50°C |
| Storage Temperature |
-40°C to 70°C |
| Relative humidity |
≤90%RH |
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