MEWOI3900 Contact Type Ground resistance,Earth Resistance Online Tester/Meter

OEM/ODM Testing Instruments Manufacturer

  • Main Features:: Range:Ground Resistance:0.01Ω-2000Ω;Ground voltage:AC 0~600V 1:Ground Resistance on-line monitoring 2:Ground Voltage on-line monitoring 3:Measure equipotential bonding resistance 4:Measure Low value resistor
  • Model No.:: MEWOI3900
  • Name:: MEWOI3900 Earth Resistance Online Tester

Contact Us for QuotationEmail:mewoi@mewoi.comWhatsapp: +8618620373879
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Click to Download:MEWOI3900 Online Earth Resistance Tester User Manual

INTRODUCTION

MEWOI3900 Contact Grounding Resistance Online Tester is used to monitor grounding resistance, equipotential connection resistance and grounding voltage of grounding system. The range of resistance is 0.01_~2000_, and the range of voltage is AC 0~600V. The grounding resistance is measured by precise three-wire method or simple two-wire method. The grounding voltage is measured by average rectification method. On-line detection and real-time monitoring are carried out. Users can choose RS232 or RS485 to communicate. According to the MODBUS communication protocol, users can redevelop, build a network, and realize remote multi-point online monitoring. 

MEWOI3900 grounding resistance online tester is composed of tester, monitoring software and so on. The tester is very intuitive with super large LCD display. It can set alarm critical value through its keys, and has sound and light alarm indication. The shell material has the characteristics of high and low temperature resistance, anti-corrosion, flame retardant and so on, which ensures the accuracy, stability and reliability of long-time on-line monitoring in the field, underground mine and indoor. The software can display the measured grounding resistance and grounding voltage in real time. It can automatically monitor and record the interval time through the detector or software. The interval time range is 1-999 hours. The data stored by the software can be automatically recorded to generate reports, which are convenient to save, save historical data, print and analyze.

MAIN FEATURES

1,Range:Ground Resistance:0.01Ω-2000Ω;Ground voltage:AC 0~600V
2,Ground Resistance on-line monitoring
3,Measure equipotential bonding resistance
4,Measure Low value resistor

TECHNICAL SPECIFICATION 

Function
On-line monitoring ground resistance, ground voltage, equipotential connection resistance, low resistance.
Power Supply
Standard: 12V±1VDC, 150mA Max.
Optional: 24V±1VDC.

RangeAccuracy
Resolution
Resistance
0.01Ω~20Ω
±1%rdg±3dgt
(auxiliary ground resistance 100Ω±5%, voltage to ground<10V)
0.01Ω
0.1Ω~200Ω0.1Ω
1Ω~2000Ω
Voltage
0~600V AC±1%rdg±3dgt1V
Measure Mode
Precise 3-wire measurement, simple 2-wire measurement.
Measure Method
Ground resistance: rated current change-pole method, measured current 3mA Max, 820Hz;
Voltage to ground: average value rectification method.
Data Mode
Mean.
Display Mode
4-digital super-large LCD.
Measuring Indicator
During measurement, LCD count down display.
LCD Size
128mm×75mm;
Display field: 124mm×67mm.
Dimension
L×W×H: 190mm×117mm×54mm.
Measure Rate
Voltage to ground: about 2 times/second; ground resistance: about 30 seconds/time.
Measure Times
Over 5000 times(Measuring 10Ω for one time and take a pause for 30s).
Line Voltage
Measuring voltage to ground: measuring below AC 600V.
Instrument Interface
Pluggable terminal blocks: 9 pin connector.
Communication Method
RS485 (or optional RS232).
Communication Line
USB to RS485 communication line( or optionalUSB to RS232 communication line).
Range Shift
Automatically.
Data Storage
400 sets, flash display FULL icon to indicate storage is full.
Interval Time
Range of automatic monitoring interval time: 1-999 h.
Data Access
Data read function: READ icon display.
Overflow Display
Exceeding measuring range overflow function: OL icon display.
Power Consumption
Backlit : 20mA Max.
Standby: 25mA Max.
Measurement: 70mA Max.
Alarm
Audible and visible alarm.
Power supply Voltage
When power supply voltage decreases to about 7.8V,    will display, reminding to replace the power.
Weight
Detector: 450g.
Working Humiture
-10℃~40℃; below 80%rh.
Storage Humiture
- -20℃~60℃; below 70%rh.
Overload Protection
Measurement ground resistance: E-P, E-C between each interfaces AC 280V/3 sec.
Insulation Value
Over 10MΩ(between circuit and enclosure 500V).
Withstand Voltage
AC 3700V/rms. (Between circuit and enclosure).
Electromagnetism

IEC61010-4-3,Radio frequency electromagnetic field≤1V/m.

Applicable Safety Rules
IEC61010-1, IEC1010-2-31, IEC61557-1,5, IEC60529(IP54), Pollution degree 2, CAT III 300V.
AccessoriesMeter*1,Power and Communication Cable*1,Aluminum Mounting Parts, Manual

MEWOI2900 Application.gif

SELECTION GUIDE

Digital Earth Resistance Clamp Meter

Click "blue"marked model No. for detailed Specificaiton

ModelRange
Resolution
clamp sizeRS232Data StorgeOther

MEWOI3000B+

MEWOI3000B+.jpg

0.01Ω-200Ω   0.001Ω65mm×32mmoptional
99sets

MEWOI3100B+

MEWOI3100B+.jpg

ø32mm

MEWOI3000B

MEWOI OEM/ODM  Instruments Manufacturer

55mm×32mm

MEWOI3000

MEWOI OEM/ODM  Instruments Manufacturer

0.01Ω-1000Ω0.001Ω55mm×32mm
99sets

MEWOI3000+

MEWOI3000B+.jpg

0.01Ω-1200Ω 0.001Ω65mm×32mmoptional99sets

MEWOI3100+

MEWOI3100B+.jpg

ø32mm

MEWOI3000D

MEWOI OEM/ODM  Instruments Manufacturer

0.01Ω-1000Ω

0.00-30.00A

0.001Ω,0.05mA 55mm×32mm
99sets

MEWOI3000D+

MEWOI3000B+.jpg

0.01Ω-1200Ω

0.00-20.00A 

0.001Ω,0.05mA 65mm×32mmoptional99sets

MEWOI3100D+

MEWOI3100B+.jpg

ø32mm

MEWOI3200

MEWOI3200.80.jpg

0.01Ω-1500Ω

0.00-40.00A 

0.001Ω,0.05mA 

65mm×32m

m

99setsRechargable Batteries

MEWOI3800CA

MEWOI3800CA.80.jpg

0.01Ω-100Ω 0.01Ω60mm*30mm,(Closed)Appoint with RS485 communication interface, provide standard MODBUS-RTU communication protocol×

MEWOI3800DA

MEWOI3800DA.80.jpg

0.01Ω-100Ω 0.01Ω

60mm*30mm

(Closed),

×LCD display,warning function.

MEWOI3800LC

MEWOI3800LC.80.jpg

0.01Ω-200Ω   0.01Ω

Split  Type

56mm×26mm

Wired network: RS232,RS485 standard communication protocol

Wireless network: RS232、RS485、GSM communication protocol

×

MEWOI3800LD

MEWOI3800LD.80.jpg

0.01Ω-200Ω 0.01Ω

Split Type

56mm×26mm

×LCD display,warning function.

MEWOI3900

MEWOI OEM/ODM  Instruments Manufacturer

0.01Ω~2000Ω0.01Ω


2/3-wires measurement

Online

MEWOI3900C

MEWOI OEM/ODM  Instruments Manufacturer

0.01Ω~2000Ω0.01Ω


2/3-wires measurementOnline,GPRS

MEWOI4000

MEWOI4000.80.jpg

0.01Ω~2000Ω;

0~600V

0.01Ω,1V
400sets2/3-wires measurement of earth resistance/voltage

MEWOI4000D

MEWOI OEM/ODM  Instruments Manufacturer

0.01Ω~2000Ω;

0~600V

0.01Ω,1V
400sets2/3-wires measurement of earth resistance/voltage

MEWOI4000C

MEWOI4000C.80.jpg

earth resistance:0.01Ω~30.00KΩ;

soil resistivity:0.01Ωm~9000KΩm;

0~600V

0.01Ω,0.01Ωm,1V
300sets2/3/4-wires measurement of earth resistance,soil resistivity,and earth voltage

MEWOI4200D

MEWOI OEM/ODM  Instruments Manufacturer

earth resistance:0.01Ω~30.00KΩ;

soil resistivity:0.01Ωm~9000KΩm;

0~600V

0.01Ω,0.01Ωm,1V
300sets2/3/4-wires measurement of earth resistance,soil resistivity,and earth voltage

MEWOI4200

MEWOI4200-1_80.jpg

earth resistance:0.01Ω~30.00KΩ;AC Leakage current: 0.00mA~600A;

soil resistivity:0.01Ωm~9000KΩm;Earth Voltage:0.0~100.0V,dual clamp: 0.01Ω-100Ω

0.01Ω,0.01Ωm,0.01A,0.1Vø68mm2000sets2/3/4-wires,selection & dual clamp method to measure the earth resistance,soil resistivity,earth voltage,AC voltage,AC leakage current,warning function.

MEWOI4300D

MEWOI OEM/ODM  Instruments Manufacturer

earth resistance:0.01Ω~30.00KΩ;AC Leakage current: 0.00mA~600A;

soil resistivity:0.01Ωm~9000KΩm;Earth Voltage:0.0~100.0V,dual clamp: 0.01Ω-100Ω

0.01Ω,0.01Ωm,0.01A,0.1Vø68mm2000sets2/3/4-wires,selection & dual clamp method to measure the earth resistance,soil resistivity,earth voltage,AC voltage,AC leakage current,warning function.

MEWOI4250

MEWOI OEM/ODM  Instruments Manufacturer

Ground resistance:0.10Ω ~ 200Ω(4 clamp method)

Ground resistance ( R ):0.10Ω ~ 20KΩ

Soil resistivity ( ρ )0kΩm~9000kΩm

AC current (A~)1mA~500.0A

Ground voltage (V~)0.0V~200.0V

0.01Ω,0.01Ωm,0.01mA,0.1Vø68mm100setsUntie-free tower grounding resistance tester


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