Major tech MT250 User manual

INSTRUCTION MANUAL
AC VOLTAGE/CURRENT
DATA LOGGER
MT250

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Contents Page no
1. Introduction.....................................................................................5
2. Features...........................................................................................5
3. Function Description..........................................................................6
4. Data Memory and Data Transmitting....................................................8
5. Caution Before Connecting.................................................................8
6. Software Introduction........................................................................8
6.1. Installation...............................................................................6
6.2. Operation.................................................................................9

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Warning!
ŸDo not attempt to make measurement in flammable gaseous areas!
ŸWhen testing non-insulated cable, pay attention to avoiding short
circuiting the cable.
ŸDo not attempt to use the instrument when your hand is wet!
ŸDo not apply over voltage and currents during measurement.
ŸStop using the instrument when there is any structural defect or
exposed metal parts.
ŸDo not install substitute parts or make modifications on the meter.
ŸNever replace the battery in moist areas.
ŸEnsure the meter is disconnected and switch off before opening the
battery cover to replace the battery.
ŸDo not attempt to place the instrument in unsteady areas.
ŸDo not get the meter close to magnetic cards, computers or displays
which will be easy influenced by the magnetic force of the magnet at
the back of the meter.
ŸDo not expose the meter to direct sunlight, high temperature and
moisture environment.
ŸSwitch off the meter after use. When the meter will not be used for a
long period, store after removing the battery.
ŸWhen cleaning, do not use abrasives or solvents on the meter, use a
damp cloth and mild detergent only.

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2. FEATURES
Sample Point Capacity 50,022 points for current & voltage 100,044
points for current or voltage
Sample Rate 1 second to 24 hour
Current Range 2 to 200A AC
Current Accuracy ±2%±1A
Current Resolution 0.1Amp AC
Voltage Range 6 to 600V AC
Voltage Accuracy ±2%±1V
Voltage Resolution 0.1V AC
MAX hold Hold the Maximum reading
MIN hold Hold the Minimum reading
Start Mode Manual & Automatic mode
Frequency range of
current or voltage 40Hz to 1kHz
Operating Range
Temperature 0°C to 60°C (32°F to 140°F) using Alkaline
Battery
Humidity 0% to 60%RH, Non-condensing
Power Source 1.5V AAA Alkaline or carbon battery (4pc)
Function Range
1. INTRODUCTION
This Data Logger is designed and produced according to IEC61010 safety
standard, tested and inspected to factory specifications.
This data logger is a precision instrument for recording AC current and
AC voltage. It is more convenient to use with the LCD display
and buttons. 1 second rapid sampling rate. Single point offset calibration
is available through software, Current and Voltage are factory calibrated.
Every channel can store 50,022 data. AC current range is from 2 to 200A,
AC voltage range is from 6 to 600V.

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3. FUNCTION DESCRIPTION
Date and time
Recording indication
The waveform of the measuring current and
voltage (This unit can only measure a wave
whose waveform resembles a sine curve)
Battery sign, when displaying completely, it
means battery power is full. When there is only
a frame icon displayed, it means the battery is
flat and should be replaced with a new one.
Data display
Function Range
1. LCD Display

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2. Power supply socket
DC voltage supply (6V-9V)
3. USB socket
When transmitting data with PC software, stop recording before
connecting to PC with the USB cable.
4. ON/OFF & data logger status button
Press the button to power on. Hold the button to power off.
Press the button to check which channel data is being recorded. If
display “CHC”, it will record or start recording the current data, and
“CHC-F” means it has recorded the current data and stopped. If display
“CHV” it will record or start recording the voltage data, and “CHV-F”
means it has recorded the voltage data and stopped. If display “CHCV” it
will record or recording the current and voltage data, and “CHCV-F”
means it has recorded the current and voltage data and stopped.
5. Function switch button
Press to switch display to current or voltage data. If the
corresponding sensor is not being connected it will display “-CH-”.
6. Date/Time & START/STOP button
Press the button to cycle on screen view of date and time when
connected. Press the button for 3 seconds for manual recording to
start and “REC” will shown on LCD. If record has started, press the
button 3 second for recording pause and “REC” will stop. Once you stop
recording, it will not record data until next record mode is set up via PC.
7. MAX/MIN button
Press the button to display the maximum or minimum value of the
measurement. If the current reading is for voltage, press this button
for MAX or MIN value of voltage. If the reading is for current, press
this button for MAX. or MIN. value of current. If there is no data, it
will display “0.0”.
8. Voltage Channel
Insert the voltage sensor to this COM to measure and record the
corresponding data.
9. Current Channel
Insert the current sensor to this COM to measure and record the
corresponding data.
10. Battery Cover

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4. Data memory and Data transmitting
Ÿ If you want to start recording, the corresponding sensor must connect
to the data logger or you can not start it. In the process of
measurement if the sensor is disconnected because of some reason it
will stop recording.
Ÿ When the memory is full, the Data Logger will stop recording and turn
off, when downloading data to PC you need to turn on the Data Logger.
The data can be read time after time until a new setup is done.
Ÿ After a new setup from PC software, all of the data in Data Logger will
be deleted, and the max and min value is set to 0.
5. Caution before connecting
Ÿ Before recording data, please make sure the sensors have been
connected (Voltage sensor or current sensor)
Ÿ Please make sure the wires are securely attached to the connector and
that no uninsulated portion of the wire is visible after the connection is
made.
Ÿ The connection wire of the sensor and Data Logger must not be too
taut to prevent pulling out while recording.
6. Software Introduction
6.1. Installation
System Required:
Windows 10 and above.
Software Introduction:
1. Insert the USB into a vacant slot. Open the location containing the
installation files.
2. After the software is installed, keep the USB in the PC and connect the
data logger with the PC by the USB cable. Then, there will be a USB
Driver installation window pop-up. Follow the icons, select the path of
USB driver and Windows will automatically install the driver from that
location.

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6.2. Operation
Time setting:
The time will be set when it is connected to your PC. If you find the DATA
LOGGER time is incorrect, click the “ ” icon to open the below dialog.
Input the correct date and correct time and select the date format display
on the Data Logger , and click “OK” button then Data Logger time will
update.
Data Logger setup:
Click on the icon “ ” on the menu bar.
“Samprate Setup” : set the sample log rate at a specific rate from 1 sec. to
24 hr.
“Channel Setup” : set up record current or voltage only. It can also
record both at the same time.
“Manual”,“Auto” : manual or auto start method
“User name” : user name. It can not leave spacebar between the
words. Maximum 14 letters.

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Data download:
Click the Download icon “ ” to download the data in the Data Logger.
Yellow line is for current data and green line is for voltage data
P.S: Please refer to the software manual for other software operation.

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[email protected] [email protected]
MAJOR TECH (PTY) LTD
South Africa Australia