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Double Clamps Ground Resistance Testing Equipment , Automatic Soil Resistivity Tester
Double Clamps Ground Resistance Testing Equipment , Automatic Soil Resistivity Tester
Specifications
Brand Name :
HAOMAI
Model Number :
GRT-300
Certification :
ISO9001:2015
Place of Origin :
China
MOQ :
1 set
Price :
negotiation
Payment Terms :
T/T
Supply Ability :
400 sets per month
Delivery Time :
5-10 working days
Packaging Details :
Transport Case + Carton
Product name :
Ground Resistance Tester, Earth Resistance Tester
Ground Resistance Measurement via 2/3/4 wire method :
0.00Ω-30.00kΩ
Ground Resistance Measurement via Double Clamps :
0.01Ω-100Ω
Ground Resistance Measurement via selection method :
0.00Ω-3000Ω
Soil Resistivity :
0.00Ωm-9999kΩm
Ground Voltage :
0.00V-100.0V
Description

Digital Earth Resistance and Soil Resistivity Tester with Double Clamps

Model: GRT-300

The GRT-300 is a comprehensive instrument for measuring earth resistance by precision 4-wire method, 3-wire method, simple 2-wire method, selection method or double clamps method, as well as for measuring soil resistivity and ground voltage.

With the design of large-caliber current clamp and the use of double clamp measuring technology, the GRT-300 is capable of performing on-line measurement without the need to install auxiliary pole and isolate the grounding body from the equipment.

The GRT-300 tester is rated to IP54 making it truly an outdoor instrument. A large, clear, easy to read backlit LCD display and thumb sized test buttons makes the instrument particularly suited to the outdoor conditions of ground testing.

The GRT-300 Digital Earth Resistance and Soil Resistivity Tester is powered from 6V/4.5Ah lead-acid battery which are widely available and deliver excellent testing time, and last more than 100 hours for standby. The battery charger is built in and the instrument is supplied with an adaptor. The battery status is display using a bar-graph.

The GRT-300 tester complies with stringent safety standards and are rated to CAT III 300V and CAT IV 150V. The ground impedance complies with IEC61557-1, and the soil resistivity complies with IEC61557-5.

Technical Data

Function measure ground resistance by four-wire, three-wire or two-wire method, selection method or double clamp method, measure soil resistivity, measure ground voltage and AC voltage
Ambient temperature and humidity 23℃±5℃, 75%rh below
Power supply DC 6V/4.5Ah lead-acid battery, last more than 100 hours for standby
Interference voltage <20V (should be avoided)
Interference current <2A (should be avoided)
Electrode spacing during R measurement a＞5d
Electrode spacing during ρ measurement a＞20h
Auxiliary ground impedance reference condition <100Ω, working condition <5kΩ
Measurement Range Ground resistance: 0.00Ω~30.00kΩ
Soil resistivity: 0.00Ωm~9999kΩm
Ground voltage: 0.00V~100.0V
Measurement mode Precise four-wire or three-wire measurement, simple two-wire measurement
Measurement method

Ground resistance: rated current and pole changing method

Soil resistivity: four-pole method

Ground voltage: average rectification(S-ES between interface)
Test frequency 128Hz
Short circuit test current > 20mA (sine wave)
Open circuit test voltage AC 28V max.
Electrode spacing range 1m~100m can be set
Gear change Ground resistance: fully automatic shifting 0.00Ω~30.00kΩ
Soil resistivity: fully automatic shifting 0.00 Ωm~9999kΩm
Backlight controllable gray screen backlight, suitable for use in dim places
Display mode 4-bit large LCD display, gray screen backlight
Measurement instructions LED flashing indicator during measurement
LCD size 111mm×68mm
LCD display field 108mm×65mm
Instrument dimensions LxWxH: 277.2mm×227.5mm×153mm
Standard test leads 4 pcs: red 15m, black 15m, yellow 10m, green 10m
Simple test leads 2 pcs: yellow 1.6m, green 1.6m
Auxiliary Ground rod 4 pcs: φ10mm×200mm
Measuring time Ground voltage: about 3 times/sec.
Ground resistance / soil resistivity: about 7 sec./time
Line voltage Measurement below AC100V (ground voltage measurement function can not be used to measure commercial power)
USB interface With USB interface, software monitoring, storage data can be uploaded to the computer for saving and printing.
Communication cable 1 pc USB communication cable, length: 1.5m
Data storage 500 data set. "MEM" is storage indicator, "FULL" symbol indicates that the memory is full.
Data query "MR" symbol appears
Overflow display Over-range overflow function: "OL" symbol appears.
Interference test Automatic identification of interference signals. "NOISE" symbol indicates when the interference voltage is higher than 5V.
Auxiliary ground test With auxiliary ground impedance test function, 0.00KΩ ~ 30kΩ (Rh max = 3kΩ +100R <50kΩ, Rs max = 3kΩ +100R <50kΩ)
Alarm function Give alarm when the measured value exceeds the alarm setting value
Battery voltage Real-time display of battery power, reminding timely charging when battery voltage is low.
Automatic Shutdown “APO” symbol appears, automatic shutdown after 15 minutes
Power consumption Standby: 40mA(backlight off)
Turn on backlight: about 43mA
Working: 75mA(backlight off)
Weight Instrument: 2.45 kg(including battery)
Test leads:1.3 kg
Auxiliary ground rod: 0.85 kg(4pcs)
Working temperature and humidity -10℃～40℃, 80%RH below
Storage temperature and humidity -20℃～60℃, 70%RH below
Overload protection Ground impedance measurement: AC 280V/3 seconds between H-E and S-ES ports
Insulation test 20MΩ above(500V between circuit and case)
Withstand voltage AC 3700V/rms(between circuit and case)
EMC IEC61326
Safety

IEC61010-1(CAT Ⅲ 300V, CAT IV 150V, pollution level 2)

IEC61010-031

IEC61557-1(ground impedance)

IEC61557-5(soil resistivity)

JJG 366-2004

Measuring Rang and Accuracy

Test Function Range Accuracy Resolution
2/3/4 wire method for measuring ground resistance 0.00Ω～29.99Ω ±2%rdg±5dgt(note 1) 0.01Ω
30.0Ω～299.9Ω ±2%rdg±3dgt 0.1Ω
300Ω～2999Ω ±2%rdg±3dgt 1Ω
3.00kΩ～30.00kΩ ±2%rdg±3dgt 10Ω
DC resistance 0.0Ω～299.9Ω ±2%rdg±3dgt 0.1Ω
300Ω～2999Ω ±2%rdg±3dgt 1Ω
3.00kΩ～30.00kΩ ±2%rdg±3dgt 10Ω
Selection method for measuring ground resistance 0.00Ω～29.99Ω ±2%rdg±5dgt(note 1) 0.01Ω
30.0Ω～299.9Ω ±2%rdg±3dgt 0.1Ω
300Ω～3000Ω ±2%rdg±3dgt 1Ω
Double clamp method for measuring ground resistance 0.01Ω～0.99Ω ±10%rdg±10dgt 0.01Ω
1.0Ω～9.9Ω 0.1Ω
10Ω～100Ω 1Ω
Soil resistivity(ρ) 0.00Ωm～99.99Ωm ρ=2πaR (note 2) 0.01Ωm
100.0Ωm～999.9Ωm 0.1Ωm
1000Ωm～9999Ωm 1Ωm
10.00kΩm～99.99kΩm 10Ωm
100.0kΩm～999.9kΩm 100Ωm
1000kΩm～9999kΩm 1kΩm
Ground voltage AC 0.00～100.0V ±2%rdg±3dgt 0.01V
AC current AC 0.0mA～1000A ±2%rdg±3dgt 0.1mA
The Digital Earth Resistance and Soil Resistivity Tester with Double Clamps GRT-300 is a comprehensive and portable tool for measuring grounding resistance by four-wire, three-wire, two-wire method, selection method or double clamp method, soil resistivity, DC resistance and ground voltage.
Product tags

clamp ground resistance tester

,

earth/ground resistance clamp tester

,

clamp type earth resistance tester
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Double Clamps Ground Resistance Testing Equipment , Automatic Soil Resistivity Tester

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Product Detail
Brand Name :
HAOMAI
Model Number :
GRT-300
Certification :
ISO9001:2015
Place of Origin :
China
MOQ :
1 set
Price :
negotiation
Contact Supplier
Double Clamps Ground Resistance Testing Equipment , Automatic Soil Resistivity Tester

HAOMAI ELECTRIC TEST EQUIPMENT CO.,LTD

Active Member
4 Years
shenzhen
Since 1999
Business Type :
Manufacturer
Main Products :
Instrument Transformer Test Set, Protection Relay Test Set, Power Transformer Test Set
Total Annual :
16500000-18000000
Employee Number :
230~270
Certification Level :
Active Member
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