Major tech MT715 User manual

INSTRUCTION MANUAL
AC TRMS OPEN JAW
CLAMP METER
MT715

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Contents Page no
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1. lntroduction ............................................................................... 4
2. Safety .......................................................................................... 4
3. Description ................................................................................. 6
3.1. Meter Description ............................................................... 6
3.2. Symbols Used on LCD Display ............................................ 7
4. Specifications ............................................................................ 8
4.1. Specifications ..................................................................... 8
4.2. General Specifications ........................................................ 9
5. Operation ................................................................................. 10
5.1. AC Current Measurements ................................................ 10
5.2. AC (True RMS)/DC Voltage Measurements ....................... 10
5.3. Low Z Voltage Measurements ........................................... 11
5.4. Resistance Measurements ............................................... 11
5.5. Continuity Measurements ................................................. 11
5.6. Capacitance Measurements ............................................. 12
5.7. Diode Measurements ........................................................ 12
5.8. Non-Contact Voltage (NCV) Measurements ...................... 12
6. Button ....................................................................................... 13
6.1. MODE and Backlight Button .............................................. 13
6.2. MAX/MIN Button ............................................................... 13
6.3. DATA HOLD and Flashlight Button .................................... 13
7. Automatic Power OFF .............................................................. 13
8. Maintenance ............................................................................. 14

2. Safety
2.1 International Safety Symbols
ŸThis symbol, adjacent to a terminal, indicates that under
normal use, hazardous voltages may be present.
ŸDouble insulation.
ŸApplication around and removal from uninsulated hazardous
live conductors is permitted
ŸThis symbol, adjacent to another symbol or terminal,
indicates the user must refer to the manual for further
information.
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The MT715 is a hand held digital open jaw clamp meter. The instrument
LCD adopts a negative display, rotary switch with backlight indication,
which facilitates the user to operate the instrument under dark/dim
conditions. The MT715 is idea for Industrial and domestic applications
where high current measurement is required.
1.1. Measurements:
• AC/DC Voltage
• Low Input Impedance Test AC/DC Voltage
• Resistance
• Capacitance
• Continuity
• Diode
• Non Contact Voltage
1.2. Features:
• Negative LCD display
• Auto Power OFF
• Data Hold and Flash Light
• Fork Clamp Current
• Backlit Range Markings
1. lntroduction
!

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2.2. Safety Notes
• Do not exceed the maximum allowable input range of any function.
• Do not apply voltage to meter when resistance function is selected.
• Set the function switch OFF when the meter is not in use.
• Remove the battery if meter is to be stored for longer than 60 days.
2.3. WARNINGS
• Set function switch to the appropriate position before measuring.
• When measuring volts do not switch to current/resistance modes.
• Do not measure current on a circuit whose voltage exceeds 1000V.
• When selecting ranges always disconnect the test leads from the circuit
under test.
• Replace the batteries as soon as the low battery indicator “ ” appears.
2.4. CAUTIONS
• Improper use of this meter can cause damage, shock, injury or death.
Read and understand this user manual before operating the meter.
• Always remove the test leads before replacing the battery.
• Inspect the condition of the test leads and the meter itself for any
damage before operating the meter. Repair or replace if damaged before
use.
• Use great care when making measurements if the voltages are greater
than 25VAC rms or 35VDC. These voltages are considered a shock
hazard.
• Always discharge capacitors and remove power from the device under
test before performing Diode, Resistance or Continuity tests.
• Voltage checks on electrical outlets can be difficult and misleading
because of the uncertainty of connection to the recessed electrical
contacts. Other means should be used to ensure that the terminals are
not "live".
• If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired.
Input Limits
Resistance, Capacitance, Diode Test 300V AC/DC
A AC
V AC/DC
V AC/DC (Low Input Impedance)
200A
1000V AC/DC
600V AC/DC
Function Maximum Input

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3.1. Meter Description
1-NCV Indicator Test
2-Current Fork
3-Non-Contact AC Voltage Indicator Light
4-Negative LCD Display
5-Knob Indicator - Backlit
6-Rotary Selector Switch
7-Range Markings - Backlit
8-Data Hold and Flashlight Button
9-M0DE and Backlight Button
10-MAX/MIN Button
11-Flashlight
12-Battery Cover
13-COM Input Jack
14-VΩ CAP Input Jack G
3. Description
1
2
3
4
5
6
7
8
9
11
12
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3.2. Symbols Used on LCD Display
1-Alternating Voltage and Current
2-Minus Sign
3-Direct Voltage and Current
4-Auto Power Off
5-Auto Range Mode
6-Continuity Test
7-Diode Test
8-Low Battery
9-Units of Measure List
10-Measurement Display Digits
11-Maximum/Minimum
12-Data Hold
13-Low Impedance Input Mode
1
2
3
45 6 78
9
1112
13
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60.00kΩ±(1.5% + 4 digits)
10Ω
600.0kΩ100Ω
Range
600.0Ω
6.000kΩ
Accuracy ±(% of reading+digits)
±(1% + 4 digits)
Function
Resistance
Over Range Protection: 300V RMS
Resolution
0.1Ω
1Ω
6.000MΩ±(2.5% + 4 digits)
1kΩ
60.00MΩ±(3.5% + 4 digits)
10kΩ
Range
200.0A
Accuracy ±(% of reading+digits)
±(3% + 5 digits)
Function
AC Current
Over range protection: Maximum input 200A.
Frequency Response: 50 to 60Hz
Resolution
100mA
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4. Specifications
4.1. Specifications
(Auto Ranging)
600.0V 100mV
1000V ±(1.5% + 2 digits)
1V
Range
6.000V
60.00V
Accuracy ±(% of reading+digits)
±(1.2% + 5 digits)
±(1.2% + 2 digits)
Function
AC True RMS Voltage
Input Impedance: 10MΩ; Low Input Impedance Test Voltage: ±3kΩ MAX 600V AC
Accuracy Specified from +3.0% of rdg +8 digits;
Over Range Protection: 1000V RMS; Frequency Response: 50 to 1000Hz (sine wave),
50/50(All wave)
Resolution
1mV
10mV
(Auto Ranging)
600.0V 100mV
1000V ±(1.2% + 2 digits)
1V
Range
6.000V
60.00V
Accuracy ±(% of reading+digits)
±(0.9% + 5 digits)
±(1.0% + 2 digits)
Function
DC Voltage
Input Impedance: 10MΩ; Low Input Impedance Test Voltage: ±3kΩ MAX 600V AC
Accuracy Specified from +3.0% of rdg +8 digits;
Over Range Protection: 1000V
Resolution
1mV
10mV
±(5.0% + 10 digits)
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6.000µF 1nF
60.00µF
±(3.5% + 10 digits)
0.01µF
Range
60.00nF
600.0nF
Accuracy ±(% of reading+digits)
±(3% + 5 digits)
Function
Capacitance
*>6nF no specification; Over Range Protection: 300V RMS
Resolution
0.01nF
0.1nF
600.0µF 0.1µF
4000µF 1µF

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Over Range Protection: 300V RMS.
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Testing Condition
Test current of 1.5mA typical
Open circuit voltage <3VDC typical
Reading
Forward voltage drop of Diode
Function
Diode
Test current <0.35mA
While resistance is less than (50Ω)
Buzzer makes a long sound,
Continuity
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4.2. General Specifications
Clamp Jaw Opening 16mm approx.
Display 6000 Counts Negative LCD Display
Continuity Check Buzzer sounds at less than 50Ω
Diode Test Test current of 0.35mA typical; Open circuit
voltage <3VDC typical
Low Battery Indication " " is displayed
Over-Range Indication "OL" display
Measurement Rate 3 readings per second, nominal
Input Impedance 10MΩ (VDC and VAC)
Low Input Impedance ~3KΩ (VDC and VAC)
Operating Temperature 5 to 40°C (41 to 104°F)
Storage Temperature -20 to 60°C (-4 to 140°F)
Operating Humidity Max 80% up to 31°C decreasing linearly to
50% at 40°C
Storage Humidity <80%
Operating Altitude 2000 meters maximum
Drop Protection 2m
Battery Two (2) x 1.5V AA Batteries
Battery Life Without Knob, Rotary Button, Flashlight &
backlight ~100h
With Knob, Rotary Button, Flashlight &
backlight ~40h
Auto Power Off After approx. 15 minutes
Dimensions 230 x 44 x 66mm
Weight 259g
Safety For indoor use and in accordance with the
requirements for double insulation to
IEC1010-1 (2001): EN61010-1 (2001)
Overvoltage Category III 1000V and Category
IV 600V, Pollution Degree 2.

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5. Operation
NOTES: Read and understand all WARNING and CAUTION statements
in this operation manual prior to using this meter. Set the function select
switch to the OFF position when the meter is not in use.
5.1. AC Current Measurements
WARNING: Ensure that the test leads are disconnected from the meter
before making current clamp measurements.
1. Set the Function switch to the AC Current.
2. Place the current fork around the middle of the test lead.
3. The clamp meter LCD will display the reading.
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5.2. AC (True RMS)/DC Voltage Measurements
1. Insert the black test lead into the negative COM terminal and the red
test lead into the positive VΩ CAP terminal
2. Automatically change between AC or DC
3. Connect the test leads in parallel to the circuit under test
4. Read the voltage measurement on the LCD display
CORRECTINCORRECT

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5.3. Low Z Voltage Measurements
NOTES: Observe all safety precautions when working on live voltages. Do
not connect to circuits that exceed 600V AC/DC when the meter is set to
Low Z.
Low Z is used when there is a suspicion of a "ghost" voltage. Ghost
voltages are present when non-powered wires are in close proximity to
wires powered by AC voltage. Capacitive coupling between wires make it
appear that non-powered wires are connected to a real source of voltage.
The Low Z setting places a load on the circuit which dissipates and greatly
reduces ghost voltage.
1. Set the rotary function switch to the Low Z position.
2. Momentarily press the MODE button to select AC or DC voltage. The
AC or DC symbol will appear on the LCD display.
3. lnsert the black test lead into the COM input jack and the red test lead
into the V input jack. If measuring DC voltage, touch the red test lead
to the positive side of the circuit and the black test lead to the negative
side of the circuit.
4. Touch the test leads to the circuit under test.
5. Read the voltage on the LCD display.
5.4. Resistance Measurements
1. Insert the black test lead into the negative COM terminal and the red
test lead into the V Ω CAP positive terminal.
2. Set the function switch to the Ω CAP position.
3. Use the MODE button to select Resistance Measurements
4. Touch the test probe tips across the circuit or component under test.
5. Read the resistance on the LCD display.
5.5. Continuity Measurements
1. Insert the black test lead into the negative COM terminal and the red
test lead into the V Ω CAP positive terminal.
2. Set the function switch to the Ω CAP position.
3. Use the MODE button to select continuity .The display icons will
 
change when the MODE button is pressed.
4. Touch the test probe tips across the circuit or component under test.
5. If the resistance is at less than 50Ω, a tone will sound.

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5.6. Capacitance Measurements
WARNING: To avoid electric shock, discharge the capacitor under test
before measuring.
1. Set the function switch to the Ω CAP position.
2. lnsert the black test lead banana plug into the negative COM jack and
the red test lead banana plug into the V Ω CAP positive jack.
3. Use the MODE button to select CAP Measurements.
4. Touch the test probe tips across the part under test.
5. Read the capacitance value in the display.
6. The display will indicate the proper decimal point and value.
For very large values of capacitance measurement it can take several
minutes before the final reading stabilizes.
5.7. Diode Measurements
1. lnsert the black test lead banana plug into the negative COM jack and
the red test lead banana plug into the V Ω CAP positive jack.
2. Turn the function switch to Ω CAP position. Use the MODE
button to select the diode function if necessary (diode symbol will
appear on the LCD when in Diode test mode).
3. Touch the test probe tips to the diode or semiconductor junction under
test. Note the meter reading.
4. Reverse the test lead polarity by reversing the red and black leads.
Note this reading.
5. The diode or junction can be evaluated as follows:
• If one reading displays a value (typically 0.400V to 0.900V) and the
other reading displays "0L" ,the diode is good.
• If both readings display "0L" the device is open.
• If both readings are very small or "0", the device is shorted.
5.8. Non-Contact Voltage (NCV) Measurements
The NCV function works on any rotary switch position.
1. Test the detector on a known live circuit before use.
2. Hold the top of the meter very close to the voltage source as shown.
3. If voltage is present. the red light will long lighting.
NOTE: Do not touch the top of the meter when using this function.
NOTE: Test on known live circuit before using.

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6. Button
6.1. MODE and Backlight Button
• Press MODE and Backlight Button to select OHM/Diode/Continuity/CAP/
LoZ AC/DC Voltage.
• Press the MODE and Backlight button for over 1 second to turn the
button, Knob and Rotary light on.
• Press again for over 1 second to turn the button, Knob and Rotary light
off.
6.2. MAX/MIN Button
• Press MAX/MIN Button the maximum and minimum values are
measured.
• This mode is activated on each measurement except for continuity test,
diode test, capacitance test and AUTO SENSE Voltage mode.
• This mode is disabled keeping pressed MAX/MIN Button or moving the
rotary switch.
6.3. DATA HOLD and Flashlight Button
• To freeze the LCD reading, press the HOLD and Flashlight Button.
• While data hold is active, the HOLD icon appears on the LCD.
• Press the HOLD and Flashlight Button again to return to normal.
• Press the HOLD and Flashlight Button for over 1 second to turn the light
on.
• Press again for over 1 second to turn the light off.
7. Automatic Power OFF
• In order to conserve battery life, the meter will automatically turn off
after approximately 15 minutes.
• To turn the meter on again, turn the function switch to the OFF position
and then to the desired function position.
• To press and hold the MODE and Backlight Button to turn the
system on, the auto power off function will be cancelled.

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8. Maintenance
WARNING: To avoid electrical shock, disconnect the meter from any
circuit, remove the test leads from the input terminals, and turn OFF the
meter before opening the case. Do not operate the meter with an open
case.
Cleaning and Storage
Periodically wipe the case with a damp cloth and mild detergent; do not
use abrasives or solvents. If the meter is not to be used for 60 days or
more, remove the battery and store it separately.
Battery Replacement
1. Remove the Phillips head screw that secures the rear battery door
2. Open the battery compartment.
3. Replace the 1.5V x 2 AA batteries.
4. Secure the battery compartment.

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South Africa Australia