MEWOI MEWOI8000B User manual

MEWOI8000B,MEWOI8000C
Large Caliber Leakage Clamp Meter
User Manual
www.mewoi.com

CONTENT
I. Safety Precautions And Procedures ............................................... 1
1. Preliminary Instructions............................................................... 2
2. During Use................................................................................... 2
3. After Use ...................................................................................... 3
II . Introduction....................................................................................... 3
III. Model................................................................................................. 4
IV. Electrical Symbols ........................................................................... 4
V. Technical Specification..................................................................... 4
VI. Instrument Structure........................................................................ 6
VII. Method of Operation...................................................................... 7
1．Switch On/Off............................................................................ 7
2．Backlight Control....................................................................... 7
3．Data Hold/Storage...................................................................... 7
4．Data Access/ Exit ....................................................................... 7
6．Delete Data................................................................................. 8
7．Leakage Current/Current/Voltage Measurement........................ 8
VIII. Battery Replacement.................................................................. 10
IX.Accessories .................................................................................... 10

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I. Safety Precautions And Procedures
This instrument was designed in compliance with IEC1010-1& IEC1010-2-032
safety guideline relative to electronic equipment.
For your own safety and to avoid damaging the instrument you are
recommended to follow the procedures described in this manual and read
carefully all instructions preceded by this symbol
Before and during measurements keep to the following instructions:
●Do not take current measurements in wet places
●Do not take the measurements in the presence of explosive gas and
combustibles or in dusty places
●Avoid any contact with the circuit under test even though you are not
taking any measurement
●Avoid any contact with exposed metal parts, unused measuring terminals,
circuits etc. Do not take any measurement whenever anomalous conditions
occur such as deformations, breaks, leakages, blind display etc
The herewith symbols are used in this manual and on the meter
CAUTION: refer to the instruction manual. An improper use may
damage the instrument or its components as well as endanger the user.
High voltage danger: risk of electric shock

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1. Preliminary Instructions
●This instrument has been designer for use in environments with pollution
degree 2
●It can be used for voltage and current measurements on electrical
installations with overvoltage CAT III 600V
●You are recommended to respect the usual safety regulations aimed at
protecting you against dangerous current and protecting the instrument
against improper use
●Only the original accessories supplied along with the instrument guarantee
compliance with the safety standards in force. They must be in a good
conditions and, if necessary, replaced with identical ones
●Do not test nor connect to any circuit exceeding the specified overload
protection
●Do not take measurements under environmental conditions exceeding the
limits indicated in this manual
●Make sure that batteries are correctly installed
2. During Use
You are recommended to read carefully the following instructions:
CAUTION
Failure to comply with warnings and instructions may damage the
instrument and/or its components as well as injure the operator
●Do not measure in the presence of external voltages. Although the
instrument is protected, an excessive voltage may cause malfunction
●Avoid submitting the instrument to voltage while measuring (i.e. a test lead
slipping off the measuring point accidentally touching an energized point)

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CAUTION
If the “low battery”symbol is displayed
during use interrupt testing, switch off the instrument and
replace batteries.
■(Take note of the polarity when replace the battery.)
3. After Use
●Turn off the instrument pressing ON/OFF key after using it
●If you expect not to use the instrument for a long time remove batteries
II . Introduction
MEWOI8000 series of Large Caliber Leakage Clamp Meter is well
designed and manufactured for measuring AC leakage current, current,
voltage, adopt the latest CT technology and digital integrated technology. Its
large caliber 80mm×80mm can clamp electric cable of 80mm diameter, or
96mm×4mm flat cable and steel earth wires, particularly suitable for leakage
current measurement of cable and transformer earth steel. Full automatically
and simultaneously measure one leakage current and three voltages, all the
data are displayed in the screen, which is very clear and convenient. The
meter is widely used in electric power, communication, meteorology, railway,
oil field, architecture, measuring, teaching research unit, industrial mining
enterprises, etc.
MEWOI8000 series of Large Caliber Leakage Clamp Meter’s clamp
core is made of special alloy, adopt the latest magnetic shielding techniques,
can almost shield the influence from external magnetic field, to ensure the
high precision, high stability and high reliability of perennial uninterrupted

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measurement. The meter can store 200 sets of data, with RS232 interface,
upload stored data to the computer through the system software,
implementing online real-time monitoring, historical inquires, dynamic display.
With the function of historical data read, preserve, print, and backlight, data
hold, etc. It is a necessary tool for electrical safety testing.
III. Model
Model
Measurement Range
Resolution
Note
MEWOI800
0B (AC)
0.00mA-2000A
0.01mA
Measure
leakage current
0.00V-600V
0.01V
MEWOI800
0C (AC)
0.0A-2500A
0.1A
Measure big
current
0.00V-600V
0.01V
IV. Electrical Symbols
Extremely dangerous! The operator must strictly abide by the safety
rules; otherwise there is risk of electric shock, resulting in bodily
injury or fatalities.
Dangerous! The operator must strictly abide by safety rules;
otherwise there is risk of electric shock, resulting in bodily injury or
fatalities.
Warning! Safety rules must be strictly abided by, otherwise personal
injury or equipment damage may be caused.
Alternate Current（AC）
Direct Current（DC）
Double Insulation
V. Technical Specification
Function
Measure AC leakage current, current,
there-phase, voltage
Power
6V DC(LR6×4 alkaline dry batteries, continuously
working for 12 hours)
Test Mode
Clamp CT, integral mode
Clamp Size
80mm×80mm(can clamp electric cable of 80mm
diameter, or 96mm×4mm flat cable and steel

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earth wires)
Measurement
Accuracy
(23°C±3°C, below
70%RH, measured
wire at the center of
the clamp)
0.00mA~300A ±1 .5%±3dgt
300A ~ 1200A: ±2%±3dgt
1200A~ 2000A: ±3%±3dgt
2000A~2500A: ±4%±3dgt
0.00V ~ 600V: ±1.5%±3dgt
Measured Wire
Position
Measured wire at approximately the geometric
center of the clamp
Data Storage
200 sets, “FULL”symbol indicate the memory
is full
RS232 Interface
With RS232 interface, download data to
computer for analysis and management
Communication Wire
RS232 communication wire, 1.8m
Frequency
50Hz ,60Hz automatic identification
Gear Shift
Automatic shift
Sample Rate
About 2 times/second
Line Voltage
Below AC 600V line measurement
Display Mode
LCD: 128dots×64dots;
Display area: 43mm×29mm
Meter Size
Length 275mm ×Width 145mm ×Height 40mm
Backlight
Controlled by LIGHT key
Data Hold
“HOLD”symbol appears
Overflow
“OL”symbol appears
Automatic Shutdown
Automatically shutdown about 15 minutes after
power on to reduce battery consumption
Voltage Detection
Low battery symbol “ " appears to remind
the replacement of battery when the battery
voltage drops below 5.2V.
Weight
1kg(with batteries and accessories)
Working Current
50mA with enabled backlight; 25mA with disabled
backlight

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Working
Temperature and
Humidity
-10°C ~ 40°C ; 80%rh
Storage Temperature
and Humidity
-10°C ~ 60°C; below 70%rh
Insulation strength
AC 2kV/rms(between core and shell)
Safety Specifications
IEC1010-1, IEC1010-2-032, 2 class of pollution,
CAT III (600V)
VI. Instrument Structure
1. Clamp 2. Function keys area
3. LCD display 4. Voltage input interface
5. Opening lever 6. RS232 interface
7. Housing screw (6 pieces) 8. Battery cover
9. Battery cover screw (1 piece)

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VII. Method of Operation
1．Switch On/Off
Press POWER key to switch on, LCD display, in test mode, press
POWER key to switch off. The meter will automatically power off after
booting 15 minutes later. If LCD display is darker, maybe the battery
voltage is too low, please replace batteries.
In data hold mode, firstly press HOLD key to cancel the lock, then
press POWER key to switch off.
2．Backlight Control
After booting, press LIGHT key to control the backlight, suitable for dim
places and night, default open after booting.
3．Data Hold/Storage
In test mode, press HOLD key to lock currently displayed value and
display “HOLD “symbol. At the same time, this locked value as a set of data
followed by auto-ID and store, display the group number such as “SAVE NO.：
001”, and then press HOLD key to cancel the lock, “HD”symbol disappear,
then continue to measure. Loop operation, the meter can store 200 sets of
data. If the memory is full, display “FULL”symbol.
4．Data Access/ Exit
In test mode, press MENU key to access data inquiry form group “R：001”,
and display “READ” symbol. It is allowed to rapidly navigate to the desired
page number. Press “△”key to increase the page number by one, press ”▽”
key to increase the page number by ten. Press MENU key to exit date inquiry,
back to test mode.
5．Data Upload
Connecting the meter and computer with USB-RS232 communication

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line attached in package. Start up the meter, run software, choose history
access, then read, save, report, print history data, etc. The more data storage,
take the longer time to read it. Historical data can be saved in Txt text or Excel
format.
6．Delete Data
At the date inquiry mode, press CLEAR key to access deleting data
menu, then press“◁”or “▷”keys to move the cursor to “YES”or “NO”item.
Press MENU key to confirm deletion or return to the test mode.
7．Leakage Current/Current/Voltage Measurement
High voltage, very dangerous！Only qualified personnel
after training could conduct operation on it. The operator
should obey safety regulations; Otherwise there will be the
danger of electric shock resulting in personal injury or
casualty.
Dangerous! Can not be used to test voltage higher than
600V. Otherwise there will be the danger of electric shock
resulting in personal injury or casualty.
Make sure the clamp well closed when measuring leakage
current and current.
Make sure the measured wire at approximately the
geometric center of the clamp.
Clean the clamp after finishing measurement, regularly
maintain the meter.
Be sure to connect test wires correctly when measuring
voltage to avoid short circuit.
After measuring voltage, should firstly take the test line
away from measured wire, and then draw from meter, in
order to avoid shock.
Clamp live wire and null line together to measure leakage
current of electric equipment. (Note: 2 wires)
Clamp earth wire to measure grounding line leakage
current of electric equipment. (Note: single wire)
Clamp four wires of there phase to measure the total
leakage current. ( Note: 4 wires)
Clamp main line to measure total current of that main line.

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(Note: single wire)
Test reference illustrations:
Measuring Box
Test phase current and voltage
Test
power
safety
Test leakage
of bury cable
in wall Test equipment
safety operation
Test
ground
leakage
Ground

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VIII. Battery Replacement
Warning! Make sure the battery cover is well closed
before measurement, otherwise there will be danger.
Take note of the battery polarity, otherwise it may
cause damage to the instrument.
If the battery power is not enough, please change in
time.
Take out the batteries if you expect not to use the
meter for a long time.
1．“ ”is displayed when the power voltage is lower than 5.2V, indicating
that the battery should be replaced.
2. Press POWER key, make sure the meter is power off. Loosen the battery
cover screw, open the plate, replace new batteries and cover the plate,
then tighten screw.
3. Press POWER key to check whether the batteries are successfully
replaced, repeat step 2 if it doesn’t work.
IX. Accessories
Main Unit
1 piece
Meter Box
1 piece
Test Line
4 pieces (3 red, 1 black)
RS232 Data Line
1 piece
Disk
1 piece
Battery
4 pieces（Alkaline Dry Battery LR6）
User Manual
1 piece
Guarantee Card
1 piece
Certification
1 piece

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