Major tech MT782 User manual

MT782
1500V DC SOLAR CLAMP METER
WITH DATA LOGGER & MOBILE APP
INSTRUCTION MANUAL

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Contents Page no
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1. Introduction.................................................................................... 5
2. Safety.............................................................................................5
2.1. Safety Information....................................................................5
2.2. Per IEC1010 Overvoltage Installation Category.............................6
2.3. Safety Instructions....................................................................6
3. Description......................................................................................7
3.1. Meter Description......................................................................7
3.2. Understanding the Push Buttons.................................................8
3.2.1. Cursor Buttons................................................................8
3.2.2. Physical Buttons..............................................................8
3.3. Understanding the Display..........................................................8
3.3.1. Measurement on the LCD Display......................................8
3.3.2. Icons on LCD Display.......................................................8
3.4. Understanding the Rotary Switch................................................9
4. Operation......................................................................................10
4.1. DC Voltage Measurement.........................................................10
4.2. AC+DC Voltage Measurement...................................................11
4.3. AC Voltage Measurement.........................................................12
4.4. Frequency Measurement..........................................................13
4.5. LoZ AC Voltage Measurement.................................................14
4.6. Resistance Measurement.........................................................15
4.7. Continuity Check.....................................................................16
4.8. Diode Test..............................................................................17
4.9. Capacitance Measurement.......................................................18
4.10. Temperature Measurement......................................................19
4.11. Flexible Coil Current Measurement............................................20
4.12. DC Clamp Current Measurement...............................................21
4.13. AC Clamp Current Measurement................................................22
4.14. Inrush Current Measurement....................................................23
4.15. VFD Mode...............................................................................24
4.16. Hold Mode..............................................................................24
4.17. Capturing Minimum and Maximum Values..................................24
4.18. Relative Values........................................................................25
4.19. Capturing Peak Values..............................................................25
4.20. Non-Contact AC Voltage Detector (100 to 1000V AC)...................25
5. Settings Menu.................................................................................26
5.1. Using Settings Menu................................................................26
5.2. Settings Details.......................................................................26

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5.2.1. Language.................................................................... 26
5.2.2. Setup..........................................................................27
5.2.3. Date/Time................................................................... 27
5.2.4. System Info..................................................................28
5.2.5. Factory Set...................................................................28
5.3. Record Measurements..............................................................29
6. Specifications................................................................................. 32
6.1. General Specifications..............................................................32
6.2. Technical Specifications............................................................32
6.2.1. DC Voltage..................................................................32
6.2.2. AC TRMS Voltage.........................................................33
6.2.3. LowZ AC TRMS Voltage.................................................33
6.2.4. AC+DC TRMS Voltage...................................................33
6.2.5. LowZ AC+DC TRMS Voltage..........................................33
6.2.6. DC Current..................................................................34
6.2.7. AC TRMS Current (50Hz-60Hz)......................................34
6.2.8. Flexible Coil Current (50Hz-400Hz).................................34
6.2.9. Resistance and Continuity Test.......................................34
6.2.10. Diode Test...................................................................34
6.2.11. Frequency (Electronic Circuits)......................................35
6.2.12. Duty Cycle...................................................................35
6.2.13. Capacitance............................................................... 35
6.2.14. Temperature with K-Type Probe.....................................35
Contents Page no

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This symbol adjacent to another symbol, terminal or operating
device indicates that the operator must refer to an explanation
in the Operating Instructions to avoid personal injury or
damage to the meter.
This WARNING symbol indicates a potentially hazardous
situation, which if not avoided, could result in death or serious
injury.
This CAUTION symbol indicates a potentially hazardous
situation, which if not avoided, may result damage to the
product.
This symbol advises the user that the terminal(s) so marked
must not connected to a circuit point at which the voltage with
respect to earth ground exceeds (in this case) 1000 VAC or
VDC.
2. SAFETY
2.1. Safety Information
1. INTRODUCTION
The MT782 is a CAT IV 600V True RMS 1000A AC/DC digital clamp meter.
This clamp meter has a large 6000 count colour TFT LCD display with an
analogue bargraph that provides fast sampling times and high accuracy
measurements. The meter has been designed to measure 1500V DC
purposely for the Solar industry, 1000V AC, K-Type temperature, frequency,
capacitance, AC+DC Voltage and resistance measurements. The Low Z ACV
range has a low pass filter to eliminate errors caused by "Ghost" voltages.
The 100ms Inrush current detects starting up currents of electric motors,
input surge current, or switch-on surge currents, this is the maximum
instantaneous input current drawn by an electrical device when first turned
on.
The meter has a built-in record and store function and displays trend
capture, using the Bluetooth function the meter wirelessly transmits data to
the Android or iOS mobile App allowing the user to view, save, organise
and share recordings. Added features is Non-Contact voltage detection,
Peak Hold, Min/Max and Average, Data hold function and a built-in
flashlight for dimly lit areas. The double injection moulded housing is IP65
waterproof.

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This symbol adjacent to one or more terminals identifies them as being
associated with ranges that may, in normal use, be subjected to
particularly hazardous voltages. For maximum safety, the meter and its
test leads should not be handled when these terminals are energized.
This symbol indicates that a device is protected throughout by double
insulation or reinforced insulation
2.2. Per IEC1010 Overvoltage Installation Category
Overvoltage Category I
Equipment of OVERVOLTAGE CATEGORY I is equipment for connection to
circuits in which measures are taken to limit the transient overvoltages to an
appropriate low level.
Note: Examples include protected electronic circuits.
Overvoltage Category II
Equipment of OVERVOLTAGE CATEGORY II is energy-consuming
equipment to be supplied from the fixed installation.
Note: Examples include household, office, and laboratory appliances.
Overvoltage Category III
Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed
installations.
Note: Examples include switches in the fixed installation and some
equipment for industrial use with permanent connection to the fixed
installation.
Overvoltage Category IV
Equipment of Overvoltage Category IV is for use at the origin of the
installation.
Note: Examples include electricity meters and primary over-current
protection equipment.
2.3. Safety Instructions
This meter has been designed for safe use, but must be operated with
caution. The rules listed below must be carefully followed for safe operation.
• Never apply voltage or current to the meter that exceeds the specified
maximum:
• Use extreme caution when working with high voltages.
• Do not measure voltage if the voltage on the COM Input jack exceeds
1000V above earth ground.
• Never connect the meter leads across a voltage source while the function
switch is in the current, resistance or diode mode, doing so can damage
the meter.
• Always discharge filter capacitors in power supplies and disconnect the
power when making resistance or diode tests.
• Always turn off the power and disconnect the test leads before opening
the covers to replace the fuse or batteries.

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3. DESCRIPTION
3.1. Meter Description
1 - Current Clamp
2 - Work Light
3 - Non-Contact Voltage Indicator
4 - Clamp Trigger
5 - LCD Display
6 - MODE/VFD Button
7 - RANGE Button
8 - INRUSH/Menu Button
9 - Hold/Relative Button
10 - Light Button
11 - Rotary Function Switch
12 - COM Input Jack
13 - Positive Input Jack
14 - Battery Cover Lock
15 - Battery Cover
• Never operate the meter unless the back cover and the battery and fuse
covers are in place and fastened securely.
• If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
V DC/AC 1500VDC/1000VAC RMS
A AC/DC 1000ADC/AC RMS
Frequency, Resistance, Capacitance, 1000VDC/AC RMS
Duty Cycle, Diode Test, Continuity
Temperature 1000VDC/AC RMS
Surge Protection 8kV peak per IEC 61010
Function Maximum Input

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3.2. Understanding the Push Buttons
The 9 push buttons on the front of the Meter activate features that augment
the function selected using the rotary switch, navigate menus or control
power to Meter circuits.
3.2.1. Cursor Buttons:
Select an item in a menu, adjust display contrast, scroll through information,
and perform data entry.
“REL ” Use Navigation UP buttons select PEAK function.
“MAX ” Use Navigation Left buttons to select REL function.
“PEAK ” Use Navigation Right buttons select MAX function.
3.2.2. Physical Buttons:
“HOLD/REL” Freezes the present reading in the display and allows the
display to be saved.
“MODE/VFD” Press the MODE key to switch the functions.
“RANGE” Press the RANGE key to manual range.
“IR/ ” Press the IR key to switch DMM Mode and IR+DMM Mode.
“INRUSH/Menu” Enter function of the MENU or INRUSH selects.
1 - Indication of Battery Charge
Level
2 - Indication of Measuring Result
3 - Indication of Automatic/Manual
Mode
4 - Analogue Bargraph
5 - Indications Associated with
Function Keys
6 - Indication of the system’s Time
7 - Indication of Measuring Unit
3.3. Understanding the Display
3.3.1. Measurement on LCD Display
3.3.2. Icons on LCD Display
Voltage is over 30V (AC or DC) AC Voltage or Current
Warming DC Voltage or Current
Flexible Coils AC+DC Voltage or Current
Traditional Clamps Continuity Function
Relative Diode Function
High Edge Time Ohms
Variable Frequency Driver VFD Loz Low Impedance Mode
Inrush Current

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3.4. Understanding the Rotary Switch
• Select a primary measurement function by positioning the rotary switch to
one of the icons around its perimeter.
• For each function, the Meter presents a standard display for that function
(range, measurement units, and modifiers).
• Button choices made in one function do not carry over into another
function.
DC and AC+DC Voltage Measurement
Low Impedance Mode AC voltage Measurement
Frequency and Duty Measurement
Resistance, Diode Test, Capacitance and Continuity Measurement
Temperature Measurement
AC and DC 60 Amps Clamp Current Measurement
AC and DC 600 Amps Clamp Current Measurement
AC and DC 1000 Amps Clamp Current Measurement
Flexible Coils Current

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4. OPERATION
4.1. DC Voltage Measurement
1. Set the function switch to the V +DC Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Press the MODE/VFD Button to switch the DC Voltage functions.
4. Read the Voltage in the display.
CAUTION: Do not measure DC voltages if a motor on the circuit is being
switched ON or OFF, Large voltage surges may occur that can damage the
meter.

4.2. AC+DC Voltage Measurement
1. Set the function switch to the V /AC+DC Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Press the MODE/VFD Button to switch the AC+DC Voltage functions.
4. Read the AC+DC Voltage in the display.
CAUTION: Do not measure DC voltages if a motor on the circuit is being
switched ON or OFF, Large voltage surges may occur that can damage the
meter

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4.3. AC Voltage Measurement
1. Set the function switch to the V /AC+DC Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Press the MODE/VFD Button to switch the AC Voltage functions.
4. Read the Voltage in the display.
WARNING: Risk of Electrocution. The probe tips may not be long
enough to contact the live parts inside some 240V outlets for appliances
because the contacts are recessed deep in the outlets. As a result, the
reading may show 0 volts when the outlet actually has voltage on it. Make
sure the probe tips are touching the metal contacts inside the outlet
before assuming that no voltage is present.
CAUTION: Do not measure AC voltages if a motor on the circuit is being
switched ON or OFF, large voltage surges may occur that can damage the
meter.

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4.4. Frequency Measurement
1. Set the function switch to the Hz% Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Read the Frequency in the display.
4. Press the MODE/VFD Button to switch the Duty(%) functions.
5. Read the Duty in the display.

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4.5. LoZ AC Voltage Measurement
1. Set the function switch to the V~LoZ/AC+DC Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Read the Voltage in the main display
WARNING: Risk of Electrocution. The probe tips may not be long
enough to contact the live parts inside some 240V outlets for appliances
because the contacts are recessed deep in the outlets. As a result, the
reading may show 0 volts when the outlet actually has voltage on it. Make
sure the probe tips are touching the metal contacts inside the outlet
before assuming that no voltage is present.
CAUTION: Do not measure AC voltages if a motor on the circuit is being
switched ON or OFF, large voltage surges may occur that can damage the
meter.

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4.6. Resistance Measurement
1. Set the function switch to the Ω CAP Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Read the Resistance in the display.
WARNING: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any resistance
measurements, remove the batteries and unplug the line cords.

4.7. Continuity Check
1. Set the function switch to the Ω CAP Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Press the MODE/VFD Button to switch the continuity functions.
4. If the resistance is less than approximately 50Ω, the audible signal will
sound.
5. If the circuit is open, the display will indicate “OL”.
WARNING: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any resistance
measurements, remove the batteries and unplug the line cords.
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4.8. Diode Test
1. Set the function switch to the Ω CAP Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Press the MODE/VFD Button to switch the Diode functions.
• Forward voltage will typically indicate 0.400 to 3.000V.
• Reverse voltage will indicate “OL”.
• Shorted devices will indicate near 0V and an open device will indicate
“OL” in both polarities.
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4.9. Capacitance Measurement
1. Set the function switch to the Ω CAP Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
3. Press the MODE/VFD Button to switch the Capacitance functions.
4. Read the Capacitance value in the Display.
WARNING: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any resistance
measurements, remove the batteries and unplug the line cords.
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4.10. Temperature Measurement
1. Set the function switch to the K-Temp Position.
2. Insert the Temperature Probe into the input jacks, making sure to
observe the correct polarity.
3. Press the MODE/VFD Button to switch the Unit (°C or °F).
4. Read the Temperature in the display.
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4.11. Flexible Coil Current Measurement (MT740 Option Extra)
1. Set the function switch to the Flexible Coil Position.
2. Insert the black test lead banana plug into the COM Input jack; Insert
the red test lead banana plug into the Positive Input jack.
4. Read the Current in the display.
5. Press the MODE/VFD Button to switch the AC and AC+DC Current.
6. Press the RANGE Button to switch range: 1000mA, 10A, 30A, 40A,
100A, 300A, 400A, 1000A, 3000A.
7. The current measurement of flexible coil has only three ranges, which
are AC 30.00A; AC 300.0A; AC 3000A.
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