China Earth Resistance Soil Resistivity Tester

I.Introduction

Earth Resistance Soil Resistivity Tester is specially designed and manufactured for measuring earth resistance, soil resistivity, earth voltage, AC voltage. Adopting the latest digital and micro-processing technology, precise 4-pole, 3-pole and simple 2-pole method for earth resistance measurement, 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.
ETCR3000B Earth Resistance Soil Resistivity 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 300 sets of data, fulfilling historical inquiry and online real-time monitoring through monitoring software, dynamic display, alarm indicator, 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 Quantitybase ConditionWorking ConditionsRemarkAmbient Temp23ºC±1ºC-10ºC-40ºC----Ambient Humidity40%-60%<80%----Working Voltage9V±0.1V9V±1.5VrC,rPAuxiliary Earth Resistance<100Ω<30kΩ----Interference Voltageno<20V----Interference Currentno<2A Electrode Distance when measuring Ra>5da>5d----Electrode Distance when measuring ρa>20ha>20h----

2. General Specification

FunctionMeasurement of 2/3/4-pole earth resistance, soil resistivity, earth voltage, AC voltagePower SupplyDC 9V(Zi-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours )Measurement RangeEarth Resistance: 0.00Ω-30.00kΩSoil Resistivity: 0.00Ωm-9000kΩmMeasuring ModePrecise 4-pole measurement, 3-pole measurement, simple 2-pole measurementMeasuring MethodEarth Resistance: rated current change-pole method, measurement current 20mA Max
Soil Resistivity: 4-pole measurement (Wenner method)
Earth Voltage: average rectification(between P(S)-ES)Test Frequency128Hz/111Hz/105Hz/94Hz(AFC)Short-circuit Test CurrentAC 20mA maxOpen-circuit Test CurrentAC 40V maxTest Voltage WaveSine waveElectrode DistanceRangeCan be set 1m-100mShiftEarth Resistance: 0.00Ω-30.00kΩ, automatic shiftSoil Resistivity: 0.00Ωm-9000kΩm, automatic shiftBacklightBlue screen backlight, suitable for dim placesDisplay Mode4-digital super-large LCD display, blue screen backlightMeasuring IndicatorDuring measurement, LED flash indicator, LCD count down display, progress bar indicatorLCD frame Dimension128mmx75mmLCD Window Dimension124mmx67mmDimensionLxWxH: 215mmx190mmx95mmStandard Test Wire4 wires: each for red 20m, black 20m, yellow 10m, and green 10mSimple Test Wire2 wires: each for red 1.6m and black 1.6mAuxiliary Earthing Rod4 rods: Φ10mmx150mmMeasuring RateEarth voltage: about 3 times/secondEarth resistance, soil resistivity: about 5 seconds/timeMeasuring TimesOver 5000 times (Short-circuit test, interval time should be at least 30 seconds)Line Voltagebelow AC 600VRS232 InterfacePossess RS232 interface, software supervision, storage data can be uploaded to computer, saved or printed.Communication WireOne piece of RS232 communication wire, with length 1.5mData Storage300 sets, "MEM" icon storage indicator, flash display "FULL" icon to indicate storage is fullData HoldData hold function: "HOLD" icon displayData AccessData read function: "READ"icon displayOverflow DisplayExceeding measuring range overflow function: "OL" icon displayInterference TestRecognize interference signal automatically, "NOISE" icon display when interference voltage exceed 5VAuxiliary Earthing TestCan measure auxiliary earth resistance, 0.00KΩ-30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ)Alarm FunctionWhen measuring value exceeds alarm setting value, there is "Toot-toot-toot" alarm hintBattery VoltageWhen battery voltage decreases to about 7.5V, battery voltage low icon will display, reminding to replace battery. Power ConsumptionStandby: about 20mA (Backlight shut off)Boot and with backlight: about 45mA (25mA without backlight)Measurement: about 100mA (Backlight shut off)WeightTotal weight: 4.5kg (including package)Tester: 1443g (including battery)Tesing wires: 1560gAuxiliary earthing rods: 935g (4pcs)WorkingTemperature & Humidity-10ºC-40ºC, below 80%rhStorage temperature & humidity-20ºC-60ºC, below 70%rhOverload ProtectionMeasuring earth resistance: between each interfaces of C(H)-E,P(S)-ES,AC 280V/3 secondsInsulation ResistanceOver 20MΩ (between circuit and enclosure it is 500V)Withstanding VoltageAC 3700V/rms (Between circuit and enclosure)Electromagnetic FeaturesIEC61326(EMC)Protection TypeIEC61010-1 (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

CategoryMeasurement RangeIntrinsic ErrorResolutionEarth Resistance
(R)0.00Ω-30.00Ω±2%rdg±3dgt0.01Ω30.0Ω-300.0Ω±2%rdg±3dgt0.1Ω300Ω-3000Ω±2%rdg±3dgt1Ω3.00kΩ-30.00kΩ±4%rdg±3dgt10ΩSoil Resistivity
(ρ)
0.00Ωm-99.99ΩmAccording to the precision of R
(ρ=2πaR
a:1 m-100m,
π=3.14)0.01Ωm100.0Ωm-999.9Ωm0.1Ωm1000Ωm-9999Ωm1Ωm10.00kΩm-99.99kΩm10Ωm100.0kΩm-999.9kΩm100Ωm1000kΩm-9000kΩm1kΩmEarth VoltageAC 0.0-600V±2%rdg±3dgt0.1V

III.Accessories

Tester1 PCTester Bag1 PCAuxiliary Earthing Rod4 PCSStandard testing Wire4 wires: each for red 20m, black 20m, yellow 10m, and green 10mSimple testing Wire2 wires: each for red 1.6m and black 1.6mZinc-manganese Dry Battery6 PCS (R14S 1.5V)Monitoring Software Disk1 CopyRS232 Communication Cable1 PCManual/Warranty Card/Qualification Certificate1 Copy

IV. Field Application