ETCR3200 Double Clamp Earth Resistance Meter Ground Resistance Multifunction Ground Resistance Tester Earth Resistance Tester
ETCR3200 Double Clamp Earth Resistance Meter Ground Resistance Multifunction Ground Resistance Tester Earth Resistance Tester
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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 |
2/3/4 pole method: change-pole method, measurement current 20mA Max Selection method: change-pole method, measurement current 20mA Max Double clamp method: disconnect mutual inductance method, measurement current 1mA Max Soil Resistivity: 4-pole measurement (Wenner method) Earth Voltage: average rectification(between P(S)-ES) AC current: mutual inductance method |
| Test Frequency | 128Hz/111Hz/105Hz/94Hz(AFC) |
| Short-circuit Test Current | AC 20mA max |
| Open-circuit Test Current | AC 40V max |
| Test Voltage Wave | Sine wave |
| Electrode Distance Range | Can be set 1m-100m |
| Shift | automatic shift |
| Backlight | Blue screen backlight, suitable for dim places |
| Display Mode | 4-digital super-large LCD display, blue screen backlight |
| Measuring Indicator | During measurement, LED flash indicator, LCD countdown display, progress bar indicator |
| LCD Frame Dimension | 128mm×75mm |
| LCD Window Dimension | 124mm×67mm |
| Dimension | L×W×H: 215mm×190mm×95mm |
| Standard Test Wire | 4 wires: each for red 20m, black 20m, yellow 10m, and green 10m |
| Simple Test Wire | 2 wires: each for red 1.6m and black 1.6m |
| Auxiliary Earthing Rod | 4 wires: Φ10mm×150mm Over 5000 times (Short-circuit test, interval time should be at least 30 seconds) |
| Measuring Rate |
Voltage to ground: about 2 times/second Current to ground: about 2 times/second Earth resistance, soil resistivity: about 5 seconds/time |
| Measuring Times | Over 5000 times (Short-circuit test, interval time should be at least 30 seconds) |
| RS232 Interface | RS232 interface, software supervision, storage data can be uploaded to computer, saved or printed. |
| Communication Wire | One piece of RS232 communication wire, with length 1.5m |
| Data Storage | 2000 sets, “MEM” icon storage indicator, flash display “FULL” icon to indicate storage is full |
| Data Hold | Data hold function: “HOLD” icon display |
| Data Read | Data read function: “READ” icon display |
| Overflow Display | Exceeding measuring range overflow function: “OL” icon display |
| Interference Test | Recognize interference signal automatically, “NOISE” icon display when interference voltage exceed 5V |
| Auxiliary Earthing Test | Can measure auxiliary earth resistance, 0.00KΩ-30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ) |
| Alarm Function | When measuring value exceeds alarm setting value, there is “Toot-toot-toot” alarm hint |
| Battery Voltage | When battery voltage decreases to about 7.5V, battery voltage low icon will display, reminding to replace battery. |
| Auto-shut off | Automaticlly shut down 15minutes after booting |
| Power Consumption | Standby: about 20mA (Backlight shut off) |
| Boot and with backlight: about 45mA (25mA without backlight) | |
| Measurement: about 100mA (Backlight shut off) | |
| Weight |
Total weight: 8.0kg (including package) Tester: 1653g (including battery) Testing wires: 1560g Auxiliary earthing rods: 935g (4pcs) |
| Working Temperature & Humidity | -10℃-40℃, below 80%rh |
| Storage temperature & humidity | -20℃-60℃, below 70%rh |
| Overload Protection | Measuring earth resistance: between each interfaces of C(H)-E,P(S)-ES,AC 280V/3 seconds |
| Insulation Resistance | Over 20MΩ (between circuit and enclosure it is 500V) |
| Withstanding Voltage | AC 3700V/rms. (Between circuit and enclosure) |
| Electromagnetic Features | IEC61326(EMC) |
| Protection Type |
IEC61010-1 (CAT Ⅲ 300V,CAT IV 150V,Pollution 2), IEC61010-031, IEC61557-1 (Earth resistance), IEC61557-5 (Soil resistivity), JJG 366-2004 |
3. Intrinsic error and performance indicators under base conditions
| Function | Measurement Range | Intrinsic Error | Resolution |
|
2/3/4 pole method measure earth resistance (R) |
0.00Ω-30.00Ω | ±2%rdg±3dgt | 0.01Ω |
| 30.0Ω-300.0Ω | ±2%rdg±3dgt | 0.1Ω | |
| 300Ω-3000Ω | ±2%rdg±3dgt | 1Ω | |
| 3.00kΩ-30.00kΩ | ±4%rdg±3dgt | 10Ω | |
|
Selection method to measure grounding resistance(R) |
0.00Ω-30.00Ω | ±2%rdg±3dgt | 0.01Ω |
| 30.0Ω-300.0Ω | ±2%rdg±3dgt | 0.1Ω | |
| 300Ω-3000Ω | ±2%rdg±3dgt | 1Ω | |
|
Double clamp method to measure grounding resistance(R) |
0.01Ω-1.00Ω | ±10%rdg±5dgt | 0.1Ω |
| 1.0Ω-10.0Ω | ±10%rdg±5dgt | 0.01Ω | |
| 10Ω-100Ω | ±10%rdg±5dgt | 1Ω | |
|
Soil Resistivity (ρ) |
0.00Ωm-99.99Ωm |
According to the precision of R (ρ=2πaR a:1 m-100m, π=3.14) |
0.01Ωm |
| 100.0Ωm-999.9Ωm | 0.1Ωm | ||
| 1000Ωm-9999Ωm | 1Ωm | ||
| 10.00kΩm-99.99kΩm | 10Ωm | ||
| 100.0kΩm-999.9kΩm | 100Ωm | ||
| 1000kΩm-9000kΩm | 1kΩm | ||
| Earth Voltage(50Hz/60Hz) | AC 0.0-600V | ±2%rdg±3dgt | 0.1V |
| AC current(50Hz/60Hz) | 0.0mA-600.0A | ±2%rdg±3dgt | 0.0mA |
Ⅲ.Accessory
Tester*1 PC
Tester Bag*1 PC
clamp*2PC
Auxiliary Earthing Rod*4 PCS
Standard testing Wire*4 wires: each for red 20m, black 20m, yellow 10m, and green 10m
Simple testing Wire*2 wires: each for red 1.6m and black 1.6m
Zinc-manganese Dry Battery*6 PCS(R14S 1.5V)
Monitoring Software Disk*1 Copy
RS232 Communication Cable*1 PC
Manual*1 Copy
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