MEWOI3000C+ Explosion Proof Type Clamp Earth Resistance Tester

Explosion Proof Type Clamp Earth Resistance Tester

  • Model No.:: MEWOI3000C+
  • Name:: Explosion Proof Type Clamp Earth Resistance Tester
Contact Us For QuotationEmail:  464560351@qq.comWhatsapp&Wechat:+8618620373879

INTRODUCTION

MEWOI3000C+ Explosion Proof Type Clamp Earth Resistance Tester is our company's technology research and development team on technical quality of the pursuit of excellence, through continuous innovation to improve, upgrade with the old product. Its performance is mainly reflected in:

  • Breakthrough in self-test the boot a long time to waiting, start immediately into the test.

  • Breakthrough relay self-test mode, using the most advanced processing algorithms and digital integration technology.

  • Breakthrough the old product to heavy issues, more in line with characteristics of hand-held devices.

  • New design, panel operation with 6 buttons, better performance.

  • Increase sound and light alarm function, with "beep-beep-beep” alarm sound.

  • Increase the interference signal recognition indicator function, with "beep-beep-beep” indicator.

  • Measurement range: 0.01Ω-1200Ω

  • Stored data 99 Units. Lower power consumption, Maximum operating current less than 50mA.

MEWOI3000C+ type clamp meter has passed the certification of explosion-proof and met GB3836-2000 explosive gas environment with electrical equipment. The explosion-proof marks is Exia Ⅱ BT3Ga. Explosion-proof qualified number: CE18.2380.It can be applied to the corresponding inflammable and explosive environment.

MEWOI3000C+  Accessories

  • Earth tester

  • Test ring

  • Manual

  • Warranty card/Qualification card

  • Aluminum Case


TECHNICAL SPECIFICATION

Measurement Range & Accuracy

MeasurementRangeResolutionAccuracy
Resistance

0.010Ω-0.099Ω

0.001Ω

±(1%rdg+0.01Ω)

0.10Ω-0.99Ω

0.01Ω

±(1%rdg+0.01Ω)

1.0Ω-49.9Ω

0.1Ω

±(1%rdg+0.1Ω)

50.0Ω-99.5Ω

0.5Ω

±(1.5%rdg+0.5Ω)

100Ω-199Ω

±(2%rdg+1Ω)

200Ω-395Ω

±(5%rdg+5Ω)

400-590Ω

10Ω

±(10%rdg+10Ω)

600Ω-8800Ω

20Ω

±(20%rdg+20Ω)


900Ω-1200Ω

30Ω

±(25%rdg+30Ω)


Technical Parameter

FunctionDescription
FunctionTest of earth resistance and loop resistance
Power Supply6VDC 4 PCS of LR6 lkaline batteries
Clamp Size65mm×32mm
LCD Size4 Digits LCD display, Screen: 47mm×28.5mm
RangeResistance: 0.010Ω~1200Ω
ResolutionResistance: 0.001Ω
AccuracyResistance: ±1%±0.01Ω; Current:±2.5%±1mA
Data Storage99 sets
Data Upload FunctionRS232 Interface (Optional)
Auto Power-offAutomatically power off after 5 minutes without any operation
Power Consumption≤50mA, continuously working for 30 hours
Working Environment-20℃~55℃;20%rh~80%rh
Store Environment-20℃~60℃;below 90%rh
EX-MarkEx ia Ⅱ BT3Ga
Explosion-proof CertificationCE18.2380
Alarm Threshold Setting RangeResistance:1~199Ω
Audible and Visible Alarm “Beep-beep-beep” alarm sound, alarm symbol flashing, press AL key to turn on/off and setting
Interference Signal Recognition“Beep-beep-beep” indicator, NOISE symbol blinking
Protection LevelDouble insulation
Structural FeatureClamp CT
ShiftAutomatic shift
External Magnetic Field<40A/m
External Electrical Field<1V/m
Single Measurement Time0.5 second
Resistance Measurement Frequency>1KHz
Measured Current Frequency50/60Hz Automatic
Low Battery Voltage IndicationWhen the battery voltage is lower than 5.3V, the low battery voltage symbol is displayed
Storage Full IndicationStorage data full of 99 sets,flashed display "MEM" symbol
Over Range Indication  Over range indication “OLΩ”, “L0.01” or “OL A”
Tester Weight1100g
Tester Dimension285mm×85mm×56mm

Measurement Principle


  • Measure the loop resistance

(Base on the formula: R=E/I)

  • Measure the grounding loop resistance system

(R1 is the measured earth resistance;

R0 is the equivalent resistance of the grounding resistor in parallel)

Measurement Method

  • Two earth point measurement method


The RA is the measured grounding object, connecting RA

and RB (which is the nearly grounding object like as water

pipe or building) with one wire, the tester will test and indicate the concatenation resistance value of the ground

resistance and the test line resistance.

RT=RA+RB+RL

(RT is the tested value, RL is the test line resistance value)



  • Three earth point measurement method


          (1).Connect the RA and RB with a test line; use the Meter to

get the first reading R1;

(2).Connect the RB and RC with a test line; use the Meter to

get the first reading R3;

(3).Connect the RA and RC with a test line; use the Meter to

get the first reading R2.

In the above three steps, the reading measured in each step is the value of the two series grounding resistance.

In this way, we can easily calculate the value of each grounding resistance,According to the reading value of R1,R2,R3:

R1=RA+RB; R2=RA+RC; R3=RB+RC

Then: RA=(R1+R2-R3)/2

As the reference points, the grounding resistance values of the other two grounding bodies

RB and RC are:

RB=R1-RA; RC=R2-RA


Field Application

  • The application of machine room earth resistance measurement

The machine room of telecommunication system normally in the upper deck of the building. It is hard to use the meg-ohm meter to measure. However, MEWOI Clamp meters are very convenient to test.


  • The application of substation earth resistance measurement

MEWOI series clamp meter can use to test the situation of contact and connect of circuit. With the help of one test line, it can be used to test the connect situation of equipment in station and the grounding system. Single point grounding measurement is allowed for the measurement of grounding resistance.


  • The application of building lightning protection grounding system measurement


If the earth poles of the building are independent of each other, the earth resistance can be measured by clamp to testing any of the earth poles, and the earth resistance can also be measured by clamp the building roof lightning arrester.When the measured value is less than the allowable value, the earth electrode is qualified.If the measurement value of the clamp meter is larger than the allowable value, please use ingle earth point method to measurement.


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


Telephone
E-mail
After Sales
QQ