ETCR3200 - Dual Clamp Ground Resistance Tester
I. Product Introduction
ETCR3200 Dual Clamp Multifunctional Ground Resistance Tester is specially designed and manufactured for on-site measurement of ground resistance, soil resistivity, ground voltage, ground wire leakage current, AC current, and DC resistance. It adopts digital processing technology, precision 4-wire method, 3-wire method, simple 2-wire method, selection method, and dual clamp method to measure ground resistance, with large-diameter current clamp design. It can measure grounding systems using large grounding down conductors, and can flexibly and accurately measure any ground resistance value in various complex grounding situations such as single-point and mesh grounding. When measuring parallel grounding, there is no need to disconnect any parallel grounding electrode, maximizing measurement convenience. It incorporates FFT (Fast Fourier Transform) technology and AFC (Automatic Frequency Control) technology, with unique anti-interference capability and environmental adaptability, and strong repeatability of tests, ensuring high precision, high stability, and high reliability for long-term measurement. It is widely used in power, telecommunications, meteorology, oil fields, construction, lightning protection, and industrial electrical equipment for measuring ground resistance, soil resistivity, ground voltage, and AC current leakage current.
ETCR3200 Dual Clamp Multifunctional Ground Resistance Tester consists of the main unit, current clamps, monitoring software, test leads, auxiliary ground rods, communication cable, etc. The main unit has a large LCD display with blue screen backlight and bar graph indication, clear at a glance. It can store 2000 sets of data, and through the monitoring software, it can achieve historical query and online real-time monitoring functions, dynamic display, alarm indication, automatic shutdown, and has functions such as historical data reading, viewing, saving, reporting, and printing.
II. Technical Specifications
1. Reference Conditions and Operating Conditions
| Influence Quantity | Reference Conditions | Operating Conditions | Remarks |
| Ambient Temperature | 23℃±1℃ | -10℃～40℃ | ---- |
| Ambient Humidity | 40%～60% | ＜80% | ---- |
| Meter Operating Voltage | 9V±0.1V | 9V±1.5V | ---- |
| Auxiliary Ground Resistance Value | ＜100Ω | ＜30kΩ | rC, rP |
| Interference Voltage | None | ＜20V | ---- |
| Interference Current | None | ＜2A | ---- |
| Electrode Spacing when Measuring R | a＞5d | a＞5d | ---- |
| Electrode Spacing when Measuring ρ | a＞20h | a＞20h | ---- |
2. General Specifications
| Function | 2, 3, 4-wire method, selection method, dual clamp method for measuring ground resistance, soil resistivity; ground voltage, AC voltage measurement, AC current leakage current measurement |
| Power Supply | DC 9V (zinc-manganese dry battery R14S 1.5V 6 pieces, continuous standby 300 hours) |
| Current Clamp Aperture | φ68mm |
| Measuring Range | Selection method measurement: 0.00Ω～3000Ω |
| Dual clamp method measurement: 0.01Ω-100Ω | |
| 2, 3, 4-wire method measurement: 0.00Ω～30.00kΩ | |
| Soil resistivity: 0.00Ωm～9000kΩm | |
| DC resistance: 0.00Ω～30.00kΩ | |
| Ground voltage: 0.0V～100.0V | |
| AC current: 0.00mA～600A | |
| Measurement Method | Precision 4-wire, 3-wire method measurement, simple 2-wire, selection method, dual clamp method for measuring ground resistance |
| Measurement Principle |
2, 3, 4-wire method measurement: variable pole method, measuring current 20mA Max Selection method measurement: variable pole method, measuring current 20mA Max Dual clamp method measurement: non-contact mutual inductance measurement method, test current 1mA Max Soil resistivity: four-pole method (Wenner method) Ground voltage: average value rectification (between P(S)-ES interfaces) AC current: clamp current transformer measurement |
| Test Frequency | 128Hz/111Hz/105Hz/94Hz(AFC) |
| Short Circuit Test Current | AC 20mA max |
| Open Circuit Test Voltage | AC 40V max |
| Test Voltage Waveform | Sine wave |
| Electrode Spacing Range | Settable 1m～100m |
| Range Switching | Fully automatic range switching |
| Backlight | Controllable blue screen backlight, suitable for dark places |
| Display Mode | 4-digit large LCD display, blue screen backlight |
| Measurement Indication | LED flashes during measurement, LCD countdown, progress bar indication |
| LCD Size | 128mm×75mm |
| LCD Display Area | 124mm×67mm |
| Meter Dimensions | Height x Width x Thickness: 215mm×190mm×95mm |
| Standard Test Leads | 4 pieces: red 20m, black 20m, yellow 10m, green 10m each 1 piece |
| Simple Test Leads | 2 pieces: red 1.6m, black 1.6m each 1 piece |
| Auxiliary Ground Rods | 4 pieces: φ10mm×150mm |
| Measurement Time | Ground voltage: about 2 times/second |
| AC current: about 2 times/second | |
| Ground resistance, soil resistivity: about 5 seconds/time | |
| Number of Measurements | More than 5000 times (short circuit test, measure once, stop 30 seconds then measure again) |
| RS232 Interface | Has RS232 interface, software monitoring, stored data can be uploaded to computer, saved and printed |
| Communication Cable | RS232 communication cable 1 piece, length 1.5m |
| Data Storage | 2000 groups, "MEM" storage indication, display "FULL" symbol indicates storage is full |
| Data Hold | "HOLD" symbol indication when holding data |
| Data Review | "READ" symbol indication when reviewing data |
| Overflow Display | "OL" symbol indication when over range overflow |
| Interference Test | Automatically identify interference signals, "NOISE" symbol indication when interference voltage is higher than 5V |
| Auxiliary Ground Test | Has auxiliary ground resistance value test function, 0.00KΩ～30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ) |
| Alarm Function | When the measured value exceeds the alarm setting value, "beep-beep-beep-" alarm prompt |
| Battery Voltage | When the battery voltage drops to about 7.5V, the low battery symbol displays, reminding to replace the battery |
| Auto Power Off | Automatically powers off 15 minutes after power on |
| Power Consumption | Standby: about 20mA (backlight off) |
| Power on with backlight: about 45mA (backlight off 25mA) | |
| Measurement: about 100mA (backlight off) | |
| Weight | Total weight: 8.0kg (including packaging) |
| Meter: 1653g (including battery) | |
| Test leads: 1560g | |
| Auxiliary ground rods: 935g (4 pieces) | |
| Operating Temperature and Humidity | -10℃～40℃; below 80%rh |
| Storage Temperature and Humidity | -20℃～60℃; below 70%rh |
| Overload Protection | Measuring ground resistance: AC 280V/3 seconds between C(H)-E and P(S)-ES ports |
| Insulation Resistance | 20MΩ or more (500V between circuit and housing) |
| Withstand Voltage | AC 3700V/rms (between circuit and housing) |
| Electromagnetic Compatibility | IEC61326(EMC) |
| Applicable Safety Standards |
IEC61010-1(CAT Ⅲ 300V, CAT IV 150V, pollution degree 2); IEC61010-031; IEC61557-1 (ground resistance); IEC61557-5 (soil resistivity); JJG 366-2004. |
| Standard Accessories | Meter: 1 piece; Current clamps: 2 pieces; Ground rods: 4 pieces; Test leads: 4 pieces; Simple test leads: 2 pieces; RS232 communication cable: 1 piece; CD: 1 piece; Meter case: 1 piece |
