Ⅰ. Introduction

      ETCR3200 Double Clamp Grounding Resistance Tester is specially design for the measurement of earth resistance, soil resistivity, earth voltage, leakage current of grounding line, AC current, DC resistance. Adopting the latest digital technology, precise 4-pole, 3-pole and simple 2-pole method, selection method, double clamp method to measure grounding resistance, for earth resistance measurement; large caliber clamp design, can use to measure the grounding system which adopt large-scale down conductor; can flexibly and precisely measure the value of grounding resistance in every complicated situation like single point grounding, grounding mesh; it is not need to disconnect any parallel connection pole when measuring parallel-grounding, and massively improve the convenience when measuring. Importing FFT and AFC technology, with a unique function of anti-interference capability and the ability to adapt to the environment, consistency of repeat testing, to ensure high precision, high stability and reliability for prolonged measure, which is widely used in electric power, telecommunications, meteorology, oil field, construction, lightning protection, industrial electrical equipment and other earth resistance, soil resistivity, earth voltage, AC voltage measurement.

      ETCR3200 Double Clamp Grounding Resistance Tester is composed of host machine, monitoring software, testing wires, auxiliary ground pillars, communication wires and others. The large LCD display of host machine is with blue backlight and bar graph indicating that can be seen clearly. At the same time it can store 2000 sets of data, fulfilling historical inquiry and online real-time monitoring through monitoring software, dynamic display, and alarm indicator, auto-shut down and with the functions like historical data access, reading, preservation, report forms, printing and so on.

Ⅱ. Technical Specifications

1.    Base Conditions and Working Conditions

Influence Quantity	Base Condition	Working Conditions	Remark
Ambient Temp	23℃±1℃	-10℃-40℃	----
Ambient Humidity	40%-60%	＜80%	----
Working Voltage	9V±0.1V	9V±1.5V	rC,rP
Auxiliary Earth Resistance	＜100Ω	＜30kΩ	----
Interference Voltage	None	＜20V	----
Interference Current	none	＜2A
Electrode Distance when measuring R	a＞5d	a＞5d	----
Electrode Distance when measuring ρ	a＞20h	a＞20h	----

2.     General specification

Function	4-pole, 3-pole and simple 2-pole, selection, double clamp method measure grounding resistance, soil resistivity; Measurement of earth voltage, AC voltage, leakage current of AC current
Power Supply	DC 9V(Zn-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours )
Caliber of clamp	Φ68mm
Measurement Range	Selection method: 0.00Ω-3000Ω
Double clamp method: 0.00Ω-9000kΩ
2/3/4 pole method:0.00Ω~30.00kΩ
Soil resistivity:0.00Ω~9000kΩ
DC resistance:0.00Ω~30.00kΩ
Earth voltage:0.0V~100.0V
AC current:0.00mA~600A
Measuring Mode	Precise 4-pole measurement, 3-pole measurement, simple 2-pole measurement, selection method, double clamp method measure grounding resistance
Measuring Method