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ST2124 Double Clamp Grounding Resistance Tester

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  • ST2124
ST2124 Double Clamp Earth Resistance & Resistivity Tester
 
Double Clamp Earth Resistance Measurements with2, 3 and 4 Wires, Auto Range
Earth Resistivity (ρ) Measurement using WENNER method
 
* High test current up to 20A.
* Advanced Filtering method (based on FFT Fast Fourier Transform) reduces noise interference for obtaining stable measurements.
* Automatic and Manual selection of the Test Current Frequency in four bands (94/105/111/128Hz). In Automatic mod.
* Warning for excessive noise and high Auxiliary Earth Spikes resistance.
* Large Graphic Display with backlight for readings in poorly illuminated areas.
* Up to 999 measurement results can be saved in the memory and recalled on the display.
* The stored results can be transferred to a PC using software and a USB adaptor which are not included.
 
Earth Resistance Measurement
1: Earth resistance measurement with 2, 3 and 4 wires and six ranges covering measurements from 0.03Ω to 19.99kΩ.
2: Also ideal for large earthing systems by the considerable test current of 20mA (max) yield-ing a high resolution of 0.001Ω on 2Ω range. 
3: Advanced Filtering method (based on “FFT” Fast Fourier Transform) reduces noise interference for obtaining stable measurements.
4: Warnings for excessive noise and high Auxiliary Earth Spikes resistance.
 
Earth Resistance Measurements with 2 ,3 and 4 Wires
2 3 4

Earth Resistivity Measurement
* The earth resistivity measurement is useful for soil surveys to establish the optimum earth electrode system design and site, to avoid extra cost of re-working electrode installations. It can be also suitable for geological investigations.
* Earth resistivity measurement is automatically calculated after having set the distance between Auxiliary Earth Spikes.
 
Measurement Method for Earth Resistivity (ρ)
p
Stick the four Auxiliary Earth Spikes into the ground deeply. They should be aligned at an interval of 1-100m. The depth should be 5% or less of the interval between the spikes.

Software
The stored results can be transferred to a PC via USB adaptor.
* Up to 999 measurement results can be saved in memory.
* Data can be converted to CSV files.
 
pc
Specification
2-Pole/3-PoleEarth Resistance Measurement
Resolution Measuring range Accuracy
0.01 W 0.0119.99 W ±(2% + 3dgt)
0.1 W 20.0~199.9 W
1 W 200.0~999.0 W
0.01KW 1.000~1.99 KW
0.01KW 2.0019.99 KW
 
Measure Resistance Coefficient “ r
Tolerance Measuring range Accuracy
0.01 W 0.06 Ω  99.99 Ω.m ±(2% + 3dgt)
0.1 W 100.0 Ω  999.9 Ω.m
0.001kW 1.000 kΩ 9.999 KΩ.m
0.01kW 10.00 kΩ  99.99 KΩ.m
0.1 KW 100.0 kΩ  999.9 KΩ.m
1 KW 1000 kΩ  1999 KΩ.m
 
Value Range of Rh & Rs
Value Range of Rh & Rs Precision
Re<1.00Ω 2kΩ ±5%rdg.±1%fs5
1.00Ω≤Re<2.00Ω 3.5kΩ
2.00Ω≤Re =Rex100+5kΩRh,Rs<100kΩ
 
Measure Interference Voltage
Items Measuring Range Tolerance Precision
Interference Voltage (Ust) 50.0 V 0.1v ±(2% + 2)
Frequency of Interference Voltage (Fst) 16Hz ~500 Hz 0.1Hz ±(1% + 0.5Hz)

TRMS Clamp current
Measuring range Resolution(mA) Accuracy
0.0 mA ~ 99.9 mA 0.1mA ±(5 % of reading +5 digits)
100 mA ~ 999 mA 1 mA ±(5 % of reading +5 digits)
1.00 A ~ 9.99 A 0.01 A ±(5 % of reading + 2 digits)
10.0A ~ 19.9A 0.1A ±(5 % of reading + 2 digits)
Input resistance: 5 Ω/1W
 
Safety Standards
This instrument is in compliance with EN61010, EN61557-1 & EN61557-5
Insulation Level : II, double-insulated
Pollution Level: 2
Maximum Altitude  2,000m
Overvoltage Level: CAT III 250V (firewire VS earth wire)
 
Basic Features
Dimensions: 270 (length) x 190 (width) x 80 (height) mm
Weight (including batteries): Approx. 1,700g
 
Power Supply
Batteries: 8 pcs batteries (1.5 V – R14G – SIZE C)
Low battery:The battery power is running out when appears.
Battery life:Meauring for 1,000 times
Fuse: F100 mA
Auto power-off: This instrument will shut down 5 minutes after the last instruction sent from PC or function selection.
 
Display
Features: 102mm * 86mm standard LCD display
Storage capacity: 999 measured values at maximum
Connecting port: USB data cable for connecting to PC (data segregation has been preset)
 
Standard Accessories
2 pcs Current clamp
Black: 6mm; Red: 15mm; Blue: 30mm; Green: 6mm
User manual
Canvas bag
 
Optional Accessories
PC software and USB data cable

Product Enquiry
Address: Room 606, 2nd building, Animation Park, No.5 Yuehai Rd, Nanshan District, Shenzhen GuangDong China. 
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