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MEWOI3300 2/3/4wires multi-function grounding resistance hook meter, clamp on ground resistance tester,clamp earth tester
MEWOI3300 2/3/4wires multi-function grounding resistance hook meter, clamp on ground resistance tester,clamp earth tester
MEWOI3300 2/3/4wires multi-function grounding resistance hook meter, clamp on ground resistance tester,clamp earth tester
MEWOI3300 2/3/4wires multi-function grounding resistance hook meter, clamp on ground resistance tester,clamp earth tester
MEWOI3300 2/3/4wires multi-function grounding resistance hook meter, clamp on ground resistance tester,clamp earth tester
MEWOI3300 2/3/4wires multi-function grounding resistance hook meter, clamp on ground resistance tester,clamp earth tester

MEWOI3300 2/3/4wires multi-function grounding resistance hook meter, clamp on ground resistance tester,clamp earth tester

2023-07-21 11:18:21  

2/3/4wires combined clamp earth tester

  • Main Features :
  • Serial No. :


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MEWOI3300, 3300B-Multifunctional grounding resistance hook meter, earth resistance meter, earthing resistance measuring instrument, hook type earthing resistance meter

Product nickname

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Product introduction

MEWOI3300 series ground pile type clamp grounding resistance meter is a high-end instrument specially designed and manufactured for on-site measurement of grounding resistance, soil resistivity, grounding current and grounding voltage. The instrument adopts advanced digital processing technology, and has various measurement methods such as clamp meter method, two-wire method, three-wire method, four-wire method, selection method, etc. The instrument adopts FFT (fast Fourier transform) technology and AFC (automatic frequency control) technology. Unique anti-interference ability and environmental adaptability, strong repeated test consistency, ensure high precision, high stability and high reliability of measurement. The instrument adopts the design of large-diameter current clamp, which can meet the test requirements of various occasions, can measure the grounding resistance value of large-sized grounding down-conductors, can flexibly measure the grounding resistance value of various complex grounding structures such as single-point and mesh grounding, and measure the grounding resistance value of parallel grounding. The system does not need to disconnect any parallel grounding electrodes, which greatly improves the convenience of measurement and provides a perfect solution for grounding performance testing.

MEWOI3300 series ground stake type clamp grounding resistance meter is composed of host, test lead, auxiliary grounding rod, communication software, communication line and so on. The host adopts a 2.5-inch color LCD screen, the instrument has a storage function, a clock function, and automatically stores 500 sets of test results including date and time. The instrument has the Bluetooth communication function that supports the Android system. After installing the APP, you can test or read the test records on the mobile terminal, bringing you a new experience. The instrument uses a large-capacity rechargeable lithium battery and has a USB charging interface. The instrument is widely used in electric power, telecommunications, meteorology, oil fields, construction, lightning protection and industrial electrical equipment and other industries.

MAIN FEATURES

1. Ground resistance can be measured by clamp meter method, two wire method, three wire method, four wire method and selection method.

2. A 2.5-inch color LCD screen is adopted. The instrument has USB interface, charging port, storage function and clock function. It can automatically store 500 groups of test results including date and time.
3. Support Bluetooth communication function of Android system. After installing app, you can test or read test records on mobile terminal, bringing you a new experience.

Product number

Model

ground resistance

range

Soil resistivity

range

ground current

range

ground voltage

range

Bluetooth communication

MEWOI3300

0.00Ω ~20kΩ

0Ωm ~9999kΩm

0.000mA ~ 20A

0V ~ 600.0V

Have

MEWOI3300B

0.00Ω ~200kΩ

0Ωm ~9999kΩm

0.000mA ~ 45A

0V ~ 600.0V

Have

Technical parameter

1. Baseline and working conditions

Amount of influence

Baseline conditions

working conditions

Remark

ambient temperature

23℃±1℃

-10℃~40℃

----

environmental humidity

40%~60%

<80%

----

Instrument operating voltage

DC 3.8V ± 0.2V

DC 3.5V~4.2V

----

Auxiliary grounding resistance value

<100Ω

<5kΩ


interference voltage

should be avoided

<5V


disturbance current

should be avoided

<1A


Electrode spacing when measuring R

a > 5d

a > 5d


Electrode spacing when measuring ρ

a >20h

a >20h


2. General Specifications

Product number

MEWOI3300

MEWOI3300B

Ground resistance range

0.00Ω~20kΩ

0.00Ω~200kΩ

Soil Resistivity Range

0.00Ωm~9999kΩm

0.00Ωm~9999kΩm

Ground current range

0.000mA~20A

0.000mA~45A

Ground voltage range

0.0V~600.0V

0.0V~600.0V

power supply

DC 3.7V 2600mAh rechargeable lithium battery, about 4.2V when fully charged

display mode

2.5 inch color LCD screen

ground resistance

Measurement methods

Clamp meter method, two-wire method, three-wire method, four-wire method, selection method

Test frequency

128Hz/111Hz/105Hz/94Hz (AFC automatic frequency selection)

Short circuit test current

AC 10mA max

Open circuit test voltage

AC 14V max

Electrode Spacing Range

1m~100m

Jaw size

65mm×32mm

Meter size

Height, width and thickness: 307mm×98mm×56mm

Meter weight

Clamp meter: about 1112g (including battery); total weight: about 5.1kg (including accessories)

test lead

4 strips: red 20m, black 20m, yellow 10m, green 10m 1 each

Simple test lead

2: Red 1.6m, 1 black 1.6m each

Auxiliary ground rod

4 pieces: φ9mm×230mm (935g)

measure time

Ground resistance: about 15 seconds/time

Ground current: about 2 times/sec

Ground voltage: about 2 times/second

Number of measurements

More than 5000 times (short circuit test, test once, stop for 30 seconds and test again)

line voltage

Measurement below AC 600V

data retention

" HOLD " symbol indicates when holding data

data storage

500 groups, " HOLD " symbol storage indication

Data access

" READ " symbol indicates when viewing data

overflow display

" OL " symbol indicates when overrange overflow occurs

Working current

Measurement: 600mA Max (max backlight)

Alarm function

When the measured value exceeds the alarm setting value, the buzzer alarm prompts "beep--beep--beep--"

battery voltage

When the battery voltage drops to about DC 3.5V±0.1V, the low battery voltage symbol “ MEWOI OEM/ODM Instruments Manufacturer” will be displayed, reminding the meter that it needs to be charged

Automatic shut-down

Automatic shutdown after 5 minutes of startup

Bluetooth communication

Yes, it supports Android system.

USB interface

Yes, only for charging.

Working temperature and humidity

-10℃~40℃; below 80%rh

Storage temperature and humidity

-20℃~60℃; below 70%rh

Overload protection

Measurement of earth resistance: AC 280V/3 seconds between each port of C (H) -E , P (S) -ES

Insulation resistance

Above 20MΩ (500V between circuit and case)

Pressure resistance

AC 3700V/rms (between circuit and case)

Electromagnetic properties

IEC61326(EMC)

Suitable for safety regulations

IEC61010-1 (CAT III 300V, CAT IV 150V, pollution degree 2); IEC61010-031;

IEC61557-1 (grounding resistance);

IEC61557-5 (soil resistivity);

JJG 366-2004 (earth resistance meter);

JJG 1054-2009 (clamp grounding resistance meter).

3. Range and accuracy (basic error under reference conditions)

Measurement function

Measuring range

precision

Resolution

Clamp meter measurement

ground resistance

0.010Ω~0.099Ω

±(1%rdg+0.01Ω)

0.001Ω

0.10Ω~0.99Ω

±(1%rdg+0.01Ω)

0.01Ω

1.0Ω~49.9Ω

±(1%rdg+0.1Ω)

0.1Ω

50.0Ω~99.5Ω

±(1.5%rdg+0.5Ω)

0.5Ω

100Ω~199Ω

±(2%rdg+1Ω)

*200Ω~395Ω

±(5%rdg+5Ω)

*400~590Ω

±(10%rdg+10Ω)

10Ω

*600Ω~880Ω

±(20%rdg+20Ω)

20Ω

*900Ω~1200Ω

±(25%rdg+30Ω)

30Ω

*1300Ω~1600Ω

±(30%rdg+100Ω)

100Ω

Two-three-four-wire method

ground resistance

0.10Ω~20.00Ω

±2%rdg±5dgt

0.01Ω

20.0Ω~200.0Ω

±2%rdg±5dgt

0.1Ω

200Ω~2000Ω

±2%rdg±5dgt

2.00kΩ~20.00kΩ

±4%rdg±5dgt

10Ω

*20.0kΩ~200.0kΩ

±4%rdg±5dgt

100Ω

selection method

ground resistance

0.10Ω~20.00Ω

±2%rdg±5dgt

0.01Ω

20.0Ω~200.0Ω

±2%rdg±5dgt

0.1Ω

200Ω~2000Ω

±2%rdg±5dgt

Soil resistivity

0.00Ωm~99.99Ωm

Depends on the measurement accuracy of R

(ρ=2πaR

a: 1m~100m;

π=3.14)

0.01Ωm

100.0Ωm~999.9Ωm

0.1Ωm

1000Ωm~9999Ωm

1Ωm

10.00kΩm 99.99k

10Ωm

100.0kΩm 999.9k

100Ωm

1000kΩm~9999kΩm

1kΩm

Ground voltage 50Hz/60Hz

AC 0.0~600.0V

±2%rdg±5dgt

0.1V

ground current

50Hz/60Hz

0.000mA~5.000mA

±(2.5%rdg+1mA)

0.001mA

5.0mA~100.0mA

±(2.5%rdg+5mA)

0.1mA

100mA~500mA

±(2.5%rdg+10mA)

1mA

0.50A~20.00A

±(2.5%rdg+0.5A)

0.01A

*20.0A~45.0A

±(2.5%rdg+0.5A)

0.1A

Note: 1. Additional error at rC max or rP max ≤±5%rdg±5dgt.

( rC max: 4kΩ+100 R<50kΩ, rP max: 4kΩ+100 R<50kΩ)

The additional error when the 2.5V interference voltage is ≤±5%rdg±5dgt.

2. *Only for Type B meters

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