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1. 4108
(产品型号展示优化词： Grounded resistance tester 4108)
Features：
Product characteristics
l Testing includes
agricultural equipment
distribution line, indoor
wiring, electrical
machinery
equipment such as
grounding resistance and soil
resistivity (ρ), equipotential
bonding
resistance test.
l Using the DSP processor and digital signal processing technology, direct extraction of
ground
measurement signal, which has high resolution, high precision, good anti-interference ability
and other characteristics, which can accurately measure the grounding resistance value.
Quick, and accurate measurement of ground environmental parameters (frequency
interference, interference voltage ), analysis of ground measurement noise, can automatically
avoid interference source.
l Contains three methods of grounding resistance test:
1).Ground pile:adopt traditional ground pile method to measure grounding resistance( you can
choose 2 poles , 3poles or 4 poles );you can measure soil resistivity (ρ).
2). Choose pole:For parallel ground lead, you can measure ground connection resistance of
ground
lead in situation of unbreak ground lead( you can choose 3poles or 4 poles )
3). No stick: Without ground pile , measure immediately.
l Grounding resistance measurement using sinusoidal AC excitation test,4 kinds of testing
frequency (94Hz,105Hz,111Hz,128Hz ), can be manually or automatically selected, so as to avoid
the
interference of ground measurement.
l Testing of the open-circuit voltage maximum 40Vrms /20 Vrms, the maximum short-
circuit current
<250mA.
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2. l Automatic ground environment parameter measurement, including: interference voltage
( UST ),
requency (FST), Clamp current measurement .
l Equipotential Bonding DC resistance measurement, DC ( DC) voltage excitation and
automatic
polarity reverse measurement. To test the maximum open-circuit voltage of <20V, the maximum
short-circuit current <250mA.
l Preprogrammed limits, pass / fail ( PASS / FAIL ) the evaluation of the results of
measurement.
l Remove test line residual resistance RK setting function.
l Test signal automatic frequency control ( AFC ) function.
l Auxiliary grounding resistance testing function
Test and display the auxiliary grounding resistance.
l Auxiliary grounding resistance limit warning display function
Since the auxiliary grounding resistance high and may not be able to properly test display
warning.
l Instrument panel calibration technology, to ensure that the expected accuracy and
performance.
l 128 x240 dot matrix large screen LCD display, with white LED backlight. User friendly
interface,
multiple measurement parameters and information with the screen display, graphical user help,
online
screen reader users manual, boot manufacturers mark display, support Chinese, English and other
languages.
l With time setting of automatic backlight off and automatic power off function.
l Real time clock, for recording and measuring work provides accurate timing.
l Convenient operation data recording function, the query log data, the internal memory can
store
1000( Group ) measurement data.
l Available alkaline battery, Ni-Hi battery, the battery compartment door can be conveniently
replaced the battery, built-in battery charger and the detection function.
l The instrument through the serial USB interface with the computer communications, and
through
computer operation instrument.
Specifications:
Disturbance voltage（UST）
Measuring
range
Resolution Frequency range Precision
0.0V～50.0V 0.1V DC /AC
45～400Hz Sine
5%+5
Interference frequency（FST）
Measuring Resolution Voltage range Precision
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3. range
16～400Hz 0.1Hz 1V～50V 1%+5
Current measurement（IST）
Measuring range Resolution Frequency
range
Precision
1.0mA～25.0mA 0.1mA 50 / 60Hz 5%+5
25mA～250mA 1mA
0.25A～2.50A 0.01A
2.5A～20.0A 0. 1A
Grounding resistance RE (testρ)
range Measuring
range
Resolution Precision
2Ω 0.020Ω～
1.999Ω
0.001Ω 2%+0.03Ω
20Ω 2.00Ω～19.99Ω 0.01Ω 2%+5
200Ω 20.0Ω～199.9Ω 0.1Ω
2000Ω 200Ω～1999Ω 1Ω
20kΩ 2.00KΩ～
19.99kΩ
0.01kΩ
200kΩ 20.0KΩ～
199.9kΩ
0.1kΩ
Selective grounding resistance（RE ）
range Measuring range Resolution Precision
2Ω 0.020Ω～1.999Ω 0.001Ω 5%+0.03Ω
20Ω 2.00Ω～19.99Ω 0.01Ω 5%+5
200Ω 20.0Ω～199.9Ω 0.1Ω
2000Ω 200Ω～1999Ω 1Ω
20kΩ 2.00KΩ～19.99kΩ 0.01kΩ
Without the wand grounding resistance measurement（ ）
range Measuring
range
Resolution Precision
2Ω 0.02Ω～1.99Ω 0.01Ω 10%+6
20Ω 2.0Ω～19.9Ω 0.1Ω 10%+2
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4. 100Ω 20Ω～100Ω 1Ω 20%
Measurement of soil resistivity (ρ)
range Measuring range Resolution Precision
20Ω·m 0Ω·m～19.99Ω·m 0.01Ω·m Depend on RG
ρ＝2×π×a×RG
Note: electrodes
a :0 ~ 30 m
200Ω·m 20.0Ω·m～
199.9Ω·m
0.1Ω·m
2000Ω·m 200Ω·m～
1999Ω·m
1Ω·m
20kΩ·m 2.00kΩ·m～
19.99kΩ·m
0.01kΩ·m
200kΩ·m 20.0kΩ·m～
199.9kΩ·m
0.1kΩ·m
2000kΩ·m 200kΩ·m～
3768kΩ·m
1kΩ·m
DC resistance （R ）measurement
range Measuring
range
Resolution Precision
2Ω 0.020Ω～
1.999Ω
0.001Ω 2%+2
20Ω 2.00Ω～
19.99Ω
0.01Ω
200Ω 20.0Ω～
199.9Ω
0.1Ω
2000Ω 200Ω～1999Ω 1Ω
20KΩ 2.00KΩ～
19.99KΩ
0.01KΩ
200KΩ 20.0KΩ～
199.9KΩ
0.1KΩ
Characteristic
l Working temperature and humidity: 0to 40º C ( no condensation≤10 º C,≤ 85%RH ).
l Working altitude:≤ 2000m. ( indoor ).
l Storage temperature and humidity: -20º C to 60º C,≤ 90%RH.
l Electrical safety grade: CATⅢ 600V pollution degree 2.
l Insulation resistance:50MΩ or greater / DC1000V (between the circuit and the outer
box ).
l High voltage: between the electrical circuit and the
outside box AC3540V (50/60Hz ) /5seconds.
l Power supply:
8 x1.5V AA alkaline batteries.
8 x1.2V Ni-Hi AA battery.
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5. Can be set to automatically shutdown and automatic shutdown
time.
l Dimensions and weight
l Dimensions and weight:205 × 95 × 42（mm） ，about 500g .
l Annex
Test lead 6m ( black )
Test lead 6m ( green )
Test lead 15m ( red)
Test lead 30m ( blue )
Test grounding rod x 4
50mm clamp x2
Test ring1
Alkaline batteries (LR6) x 8
Instructions manual
Portable bag
USB lead
Meet the standard
l IEC/EN 61557-1、4、5、10
l IEC/EN 61010-1
l IEC/EN 61010-2-031
l IEC/EN 61326
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6. Can be set to automatically shutdown and automatic shutdown
time.
l Dimensions and weight
l Dimensions and weight:205 × 95 × 42（mm） ，about 500g .
l Annex
Test lead 6m ( black )
Test lead 6m ( green )
Test lead 15m ( red)
Test lead 30m ( blue )
Test grounding rod x 4
50mm clamp x2
Test ring1
Alkaline batteries (LR6) x 8
Instructions manual
Portable bag
USB lead
Meet the standard
l IEC/EN 61557-1、4、5、10
l IEC/EN 61010-1
l IEC/EN 61010-2-031
l IEC/EN 61326
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