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category： Resistance Meters
ST2307 ground resistance tester using a combination of 2-pole and 3-pole stakes and a clamp
The ST2307 is distinctive earth ground tester that can perform all four types of earth ground measurement. Specifically, the ST2307 is able to measure earth ground loop resistances using only clamps – called Stakeless testing. This method doesn’t require the use of earth ground stakes or the disconnection of ground rods.
Testing Methods
2 Pole and 3 Pole Fall of Potential – standard earth ground testing using two grounds stakes
Selective testing – without disconnecting ground rods, a technician can measure ground resistance using a combination of stakes and a clamp.
Stakeless testing – innovative solution using only clamps, instead of ground stakes, to measure earth ground loop resistance.
The ST2307 offers these advanced features
Automatic Frequency Control (AFC) – identifies existing interference and chooses a measurement frequency to minimize its effect, providing a more accurate earth ground value.
R* measurement – calculates earth ground impedance at 55 Hz to more accurately reflect the earth ground resistance that a fault-to-earth ground would see.
Adjustable limits – for quick test result verification.
One-button measurement concept
2- pole and 3-pole earth ground measurement and soil resistivity testing
Selective testing, no disconnection of ground conductor (1 clamp)
Stakeless testing, quick ground loop testing (2 clamps)
Measuring AC current to 20A
Continuity with buzzer
99 memory locations and PC Software for print-out of measurement report.
Specifications | Range | Resistance | Accuracy | |
Earthing-resistance test (2-Pole & 3-pole) | 0.01 ~ 19.99 Ω | 0.01Ω | ±(2% + 3) | |
20.0 ~ 199.9 Ω | 0.1Ω | |||
200 ~ 999 Ω | 1Ω | |||
1.000 ~ 1.999 KΩ | 0.001KΩ | |||
2.00 ~ 19.99 KΩ | 0.01KΩ | |||
Earthing-resistance test (2-Pole clamps & 3-pole clamps) | 0.02~19.9Ω | 0.01Ω | ±(5% + 5) | |
20 ~ 150Ω | 0.1Ω | ±(10% + 5) | ||
Soil resistance ρ | 0.06 ~ 99.99 Ω.m | 0.01Ωm | ±(2% + 3) | |
100.0 ~ 999.9 Ω.m | 0.1Ωm | |||
1.000 ~ 9.999 KΩ.m | 0.001 kΩ.m | |||
10.00 ~ 99.99 kΩ.m | 0.01 kΩ.m | |||
100.0 ~ 999.9 kΩ.m | 0.1 kΩ.m | |||
1000 ~ 1999 kΩ.m | 1 kΩ.m | |||
AC current | 0.1mA ~ 0A | 0.1mA | ±(2% + 3) | |
Disturbance voltage (Ust) | 50.0 V | 0.1v | ±(2% + 2) | |
Disturbance frequency (Fst) | 16Hz – 500 Hz | 0.1Hz | ±(1% + 0.5Hz) | |
Frequency | 128Hz / 111Hz / 105Hz / 94Hz / AFC | |||
Voltage | 0.1-50V(0.1V) | |||
Short-circuit current | <20mA | |||
Features | ||||
2-Pole, 3-pole | √ | |||
ρ measurement | √ | |||
Buzzer | √ | |||
Display Backlight | √ | |||
Interference Vol / Fre | √ | |||
RK (Wire Compensation) | Automatic compensation | |||
Safety Rating | CAT III 300V | |||
Applicable standards | EN61010-1, EN61557-1-5,EN61187,EN61010-031 | |||
Data storage | 99 Groups | |||
USB 2.0 | √ | |||
General | ||||
Display | FSTN LCD; 102×86.6 mm | |||
Power | 8x1.5V R14SG SIZEC Type | |||
Dimension | 270(W)×190(L)×80(D)mm | |||
Weight | Approx. 4.0 kg | |||
Simplified measurement test leads (Blue:30M,Red: 15M, Black:6M, Green:6M)
Auxiliary earth spikes (2 spiks/set)×2 sets (4 spikes in total)
Cord reel [4 pcs])×1 set
USB adaptor with (Software)
Shoulder strap
Carrying case
R14SG*8 Battery
Instruction manual
AC Current-clamp 2 Set (1000/1A)
