MEWOI MEWOI1310B User manual

Wireless High Voltage U-Type Current Meter
MEWOI1310B
User Manual
www.mewoi.com

CONTENT
Precaution For Use................................................................................................1
1. Introduction........................................................................................................2
2. Electrical Symbols.............................................................................................3
3. Technical Specification ......................................................................................3
4. Structure............................................................................................................5
5. LCD Display ......................................................................................................5
5.1．LCD Display Screen ...................................................................................5
5.2. Explanation for Special Symbols..................................................................5
5.3．Display Demonstration................................................................................6
6. Operation Method..............................................................................................7
6.1. Detector Operation.......................................................................................7
6.1.1. Power On/Off...........................................................................................7
6.1.2. General Test............................................................................................7
6.1.3. Test Area .................................................................................................8
6.1.4. Data Transmission...................................................................................8
6.2. Receiver Operation ......................................................................................8
6.2.1.Power on/off.............................................................................................8
6.2.2. Data Reception........................................................................................9
6.2.3. Data Hold..............................................................................................9
6.2.4. Data Storage ...........................................................................................9
6.2.5. Data Access ............................................................................................9
6.2.6.Data Delete ..............................................................................................9
7. Replace Batteries............................................................................................10
8. Accessories .....................................................................................................10

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Precaution For Use
Thanks you for purchasing our MEWOI1310B Large Caliber Wireless H/L Voltage U-Type
Current Meter. In order to better for use of the product, please be certain:
——Read this user manual in detail, the operators must fully understand the manual
instructions and be able to operate the instrument skillfully, and then can field testing.
——Strictly comply with the safety rules and precautions listed in this manual.
Under any circumstance, shall pay special attention on safety in using this meter. Especially
when measuring voltage circuit overAC100V and above.
If the tested line voltage over 600V, it must be used insulation rod to connection.
Because the high voltage circuit is very dangerous, the operator must be strictly trained and
obtain the national high voltage operation certification before using the meter for field test.
It is strictly forbidden to use this meter to test bare wires or busbars with voltage over 500kV.
Pay attention to the text labeled on the panel and backplane of the Meter.
Do not place and store the meter in high temperature and humidity or dewy places and
under direct sunlight for a long time.
Replace the battery, please pay attention to the battery polarity. If you not use the leaker for
a long time, please take out batteries.
Disassembly, calibration, and repair of this tester must be performed by authorized
personnel.
If meter`s components are damaged, Please stop to use.
Due to the reason of this instrument, if it is dangerous to continue using, should stopped and
sealed immediately ,and handled by an authorized institution.
The meter manual with the danger mark " ", users must follow instructions to operate
safely.
The meter manual with the extremely dangerous mark " ", users must in strict follow
instructions to operate safely.
It is recommended that the meter should make insulation strength test at least once a year
(AC 220kV/ RMS telescopic insulation rod is fully opened between the two ends).

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1. Introduction
MEWOI1310B Large Caliber Wireless H/L Voltage U-Type Current Meter break through
the traditional structure, specially designed and manufactured for measuring high voltage
current, the unique u-type opening structure realizes the unimpeded measurement, and the
field test is very convenient. The meter is composed of special large-caliber U-type ammeter
with high-voltage insulation rod, equipped with wireless receiver, which can receive measured
data within 100 meters straight, current range: AC 0.00a-9999A. For low voltage lines below
600V, the line current can be measured directly by hook meter without insulation rod.
MEWOI1310B Large Caliber Wireless H/L Voltage U-Type Current Meter is used for
current measurement of high voltage circuit below 500kV (should connect insulation rodto use).
Below 600V circuit no need the insulation rod, and use the u-type current meter to measure
directly. The meter has data hold and data storage function. Insulation rod is equipped with
adjustable interface, u-type clamp the measured wire by insulation rod is very convenient, save
time and faster. Widely used in substation, power plant, industrial and mining enterprises,
detection stations, electrical maintenance departments for current detection and field electrical
work etc.
It can also replace the H/L voltage turns ratio tester, which can measure the H/L voltage
current of the primary circuit and secondary circuit respectively, and then calculate to get the
H/L voltage turns ratio. Insulation rod is portable, with moisture-proof, high temperature
resistance, impact resistance, bending resistance, high insulation, telescopic and other
characteristics.
Model Category
Model
Range
Resolution
CT Size
CT Structure
Wireless
Distance
MEWOI1310B
0.00A-9999A
0.01A
φ68mm
U-type
100m
MEWOI1330B
φ128mm
Hook type
100m

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2. Electrical Symbols
Extremely dangerous! The operator must strictly follow the safety rules, otherwise
there would be danger of electric shock, causing personal injury or injury accident.
Dangerous！The operator must strictly follow the safety rules, otherwise there would
be danger of electric shock, causing personal injury or injury accident.
Warning！Operators must strictly follow safety rules , otherwise personal injury or
equipment damage may occur
Alternating Current (AC)
Direct Current (DC)
3. Technical Specification
Function
Measurement of high voltage AC current, on-line monitoring of low
voltage AC current and AC current
Power Supply
DC6V Alkaline Dry Battery (1.5V AAA X4pcs)
Test Method
Non-contact U-type CT
Transmission
Method
433MHz wireless transmission, distance about 100m
Display Mode
4 digital LCD display, backlight function, suitable for dark place.
LCD Dimension
47mm×28.5mm
Meter Dimension
Detector: 107mm×252mm×31mm; Receiver:
78mm×212mm×41mm
CT Size
Φ33mm
Insulation Rod
Size
Φ45mm，Contraction state：850mm，Extension state：3600mm
Insulation Rod
Voltage Level
110KV
Sampling Speed
About 2 times/second
Measure Range
0.00A ~9999A（50/60Hz Auto Identification）
Resolution
0.01A
Shift
Automatic Shift
Test Accuracy
±1%±5dgt(The wire is located near the center of the bottom of the
u-type clamp, 23℃±2℃)

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Position Error
The measured conductor should be located as close as possible to the
center of the bottom end of the u-type clamp, and not close to the top
of the u-type clamp. The test error on the top of the u-shaped clamp
will increase by about one time or more
Data Storage
99 sets, in storage process “MEM” symbol display, “FULL” symbol flash
indicate storage is full
Line Voltage
Bare wire test below 500KV (operated with insulation rod, The
telescopic insulation rod is fully opened)
Data Hold
In general test mode, press HOLD key to hold data, “HOLD” symbol
display. press HOLD Key once again to cancel this function
Data Access
“MR” symbol display, it can look over all the stored data
Overflow Display
Exceed measurement range overflow function: “OL A” symbol display
No signal
Indication
When the receiver has not received transmit signal, dynamic display
“no- -”symbol
Auto Shut Down
About 15 minutes after boo up, the meter will shutdown automatically
without any operation, to decrease the battery consumption.
Battery Voltage
When the battery voltage is lower than 4.8V, the receiver display low
battery voltage symbol” ”(the detector low voltage display “ ”
symbol, the receiver low voltage continue display), remind to replace
battery
Weight
Tester: About 335g,
Receiver: 280g
Total weight of meter: about 2300g (including insulation rod and
battery.)
Work
Temperature and
Humidity
-10°C ~40°C ; Below 80%Rh
Storage
Temperature and
Humidity
-10°C ~60°C ; Below 70%Rh
Interference
Should avoid 315Mhz,433Mhz Same frequency signal interference
Insulation
Strength
AC 220KV/rms (The telescopic insulation rod is fully opened)
Structure
Anti-Dripping Type II

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4. Structure
4.1. U-type Clamp 4.2. Detector
4.3. Power indicator 4.4. Detector POWER key
4.5. Meter adjustable interface 4.6. Receiver POWER Key
4.7. Receiver HOLD Key 4.8. Receiver LCD
4.9. Receiver 4.10. Receiver antenna
4.11. Insulation Rod
4.12. Insulation rod adjustable interface
5. LCD Display
5.1．LCD Display Screen
5.1.1. AC Symbol
5.1.2. Low battery voltage symbol
5.1.3. Date storage symbol
5.1.4. Date access symbol
5.1.5.2-digit Storage Data Serial Number
5.1.6. Unit Symbol
5.1.7. Date Locked Symbol
5.1.8. Decimal System Radix Point
5.1.9.4-Digit LCD Digital Display
5.2. Explanation for Special Symbols
5.2.1. Low battery voltage symbol, when the battery voltage is lower than 4.8V, this
symbol display, please replace battery in time.
5.2.2. “OL A” symbol indicates that the measured current over limit range of the meter.
5.2.3. “MEM” storage mode, will display during the data storage.
5.2.4. “Full” symbol, when the storage data is full of 99 groups of data, will flash display

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“FULL” symbol, and cannot continue to store data.
5.2.5. “MR” data access symbol, display during data access, meanwhile, it will display the
serial number of storage data.
5.2.6. “End” exit symbol, display during the exit.
5.2.7. “dEL” data delete symbol, display during delete data.
5.2.8 “no- -” No received signal indication, dynamic display, it may the meter not in test
mode, or adjust received signal location and distance
5.3．Display Demonstration
5.3.1. ——The tested current :0.002A (2mA)
5.3.2. ——Locked display Data
——The data is automatic
stored as group 3
——The tested current: 160A
5.3.3.——The tested current: 571A
——Low battery voltage symbol
please replace battery.
5.3.4.——Look up data of group 3 in storage
——The tested current: 160A
5.3.5.—— “FULL” flash display:
Storage full of 99 groups
——must clear storage and then
Storage again
5.3.6.——data delete indication “dEL”
5.3.7.——Exit function indication “End”

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5.3.8.——“no- -”Dynamic display: not
received signal
6. Operation Method
Before usage, carefully check whether all parts of the meter are damaged. Only
when there is no damage can be used
According to manual instructions to install the battery
6.1. Detector Operation
6.1.1. Power On/Off
Press POWER button to power on, indication light up, enter into normal test mode. 15
minutes after power on, the meter will power off automatic without any operation.
6.1.2. General Test
Extremely dangerous! The operator must strictly follow the safety rules, otherwise
there would be danger of electric shock, causing personal injury or injury accident.
Dangerous! It is strictly forbidden to use this meter to test bare wires or busbars with
voltage over 110kV, otherwise there would be danger of electric shock, causing
personal injury or injury accident.
For high voltage test, the insulation rod must be connected and fully stretched. Hold
the end of the sheath of the insulation rod and use.
Must connect the meter with the special insulation rod
After normal boot up, Push the meter close to the tested wire with insulation rod, as shown
in Figure A, place the wire at the center of the bottom of the u-type clamp and as close as
possible to ensure the accuracy of the measurement as shown in Figure B.Pull back can
remove the meter from the tested wire, as shown in Figure C.

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Attention! For safety, after test finish, please remove the meter away from the tested
wire
6.1.3. Test Area
In testing, the position of the tested wire is very important. The tested wire should be
located as far as possible at the center of the bottom of the u-type clamp (A semicircle area at
point A), and not close the top of the u-type clamp (C area), otherwise thetest error will increase
by twice or more, and the position error of the semicircle area at point B will increase by 1%.
6.1.4. Data Transmission
The meter has the function of wireless transmitting test data. When the meter is in test
mode, the test results are transmitted to the receiver by wireless way, and the receiver displays
the test data real time at a glance.
6.2. Receiver Operation
6.2.1.Power on/off
Press POWER key to power on, LCDdisplay and enter into receive datamode.If the LCD
display is dark after starting up, the battery voltage may be low, please replace the battery. After

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15 minutes of the receiver of the detector power on, the LCD continues to blink , indicate that
will automatic shutdown. The LCD will automatically shut down after 30 seconds of continuous
flashing to reduce battery consumption. In case of LCD continuous flashing and press POWER
key, the meter will continue to work.
Under HOLD mode, press POWER key to power off.
Under data access mode, first long press POWER key ( over 3 seconds ) to exit data
access mode, return to data receive mode, press POWER key again to power off. During exit
from data access will display “End” symbol.
6.2.2. Data Reception
The receiver is in receiving mode after normal startup. If there is transmitted data, the
receiver will display the test results in real time. If no signal is received, the receiver will
continuously search for the signal and dynamically display the "no--" symbol.
6.2.3. Data Hold
In the mode of receiving data, press HOLD key can keep LCD display , and “HOLD”
symbol indication. Press HOLD key again to cancel data lock state, return to receiving data
mode, “HOLD” symbol disappear.
6.2.4. Data Storage
In the mode of receiving data, press the HOLD key to hold the data while the receiver
automatically numbers and stores the present hold data, and the "MEM" symbol flashes once in
the stored process. The receiver can store 99 groups data, if the storage is full, “FULL”symbol
will continue flashing display, memory must be cleared and then could store again.
6.2.5. Data Access
In the mode of receiving data, press HOLD+POWER key enter into data access mode,
“MR” symbol display while will automatically display storage data of the group 1. Then press
HOLD key or POWER key to read the stored data by turning upward or downward in cycle.
Automatically returns the first group of data when browse to the last group of data stored.
Long press POWER key (over 3 seconds) to exit from data access mode, return to
receiving data mode. During the exiting display “End” symbol.
6.2.6.Data Delete
In data access mode, press HOLD + POWER key to delete all storage data, and return to
data receive mode. During the deleting data display “dEL” symbol.

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7. Replace Batteries
Warning! Do not test if the battery cover plate is not well covered, otherwise it is
dangerous.
pay attention to the battery polarity, or will damage the meter
Do not mix new and old batteries for use
7.1. When battery voltage of the receiver is lower than 4.8V, the meter will continue to
display “ ” symbol, indicate that low battery. Please replace batteries in time.
7.2. Power off and make sure the meter is off state. Loosen two screws and open the
battery cover plate to replace new qualified batteries, pay special attention on the battery
specification and polarity, and then cover the board well and fasten the two screws.
7.3. Press POWER key to check whether the meter can power on normally or not. If not,
please repeat the operation according the step 2.
8. Accessories
Detector
1PCS
Receiver
1PCS
Wireless Antenna
1PCS
Stretch Insulation Rod
1PCS
Meter Case
1PCS
Manual/ Maintenance Card/ Certificate
1SET

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Your Testing Specialist