Major tech MT723 User manual

AC/DC TRMS
CLAMP METER
INSTRUCTION MANUAL
MT723
II

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Contents Page no
3
1. Safety ..................................................................................... 4
1.1. lnternational Safety Symbols ............................................ 4
1.2. SAFETY NOTES ............................................................. .4
1.3. WARNINGS ...................................................................... 4
1.4. CAUTIONS ....................................................................... 4
2. lnput Limits ............................................................................ 5
3. Meter Description .................................................................. 5
4. Symbols Used on LCD Display ............................................. 6
5. Specifications ....................................................................... 7
6. General Specifications ......................................................... 9
7. Operation ............................................................................. 10
7.1. AC Current Measurement ............................................... 10
7.2. AC Voltage Measurement ............................................... 11
7.3. DC Voltage Measurement ............................................... 11
7.4. Capacitance Measurements ........................................... 11
7.5. Frequency Measurements .............................................. 11
7.6. Resistance ..................................................................... 12
7.7. Temperature Measurements ........................................... 12
7.8. Diode Test ....................................................................... 12
7.9. Continuity Measurements ............................................... 13
7.10. Non-Contact AC Voltage Measurements ....................... 13
7.11.MODE/VFD ................................................................... 13
7.12.HOLD/Flashlight ........................................................... 13
7.13.RANGE ......................................................................... 14
7.14.PEAK/INRUSH ............................................................. 14
7.15. Relative/Backlight ......................................................... 14
7.16. Automatic Power OFF ................................................... 14
8. Maintenance ........................................................................ 15
9. Cleaning and Storage .......................................................... 15
10. Battery Replacement .......................................................... 15
11. Temperature Probe Replacement ..................................... 15

This symbol, adjacent to another symbol or terminal, indicates
the user must refer to the manual for further information.
This symbol, adjacent to a terminal, indicates that, under
normal use,hazardous voltages may be present.
Double insulation.
Application around and removal from uninsulated hazardous
live conductors is permitted.
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1. Safety
!
1.1. lnternational Safety Symbols
1.2. 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.
1.3. 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 600V.
• When changing ranges always disconnect the test leads from the circuit
under test.
1.4. 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 or fuses.
! 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.

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2. Input Limits
1. NCV Test
2. Current clamp
3. Non-contact AC voltage
indicator light
4. Clamp trigger
5. REL button
6. LCD display
7. RANGE button
3. Meter Description
8. COM input jack
9. Data Hold and Backlight button
10. Rotary Function switch
11. MODE select and Flashlight button
12. INRUSH and PEAK button
13. V Ω Diode Continuity CAP TEMP Hz%
jack
14. Battery Cover
A AC/DC
V AC/DC
Resistance, Capacitance,
Frequency, Diode Test,
Temperature
400A
1000V DC/AC
300V DC/AC
Function Maximum Input
1
2
3
4
5
6
7
8
9
11
12
13
14
10

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Data Hold
Negative reading display
Measurement display digits
REL/DCA Zero
Maximum/Minimum
Auto Power Off
Auto Range mode
Direct Current / Voltage
Alternating Current Voltage
Low battery
Milli-volts or Volts (Voltage)
(Resistance)
Amperes (Current)
Farad (Capacitance)
Hertz (Frequency)/Percent (duty ratio)
Fahrenheit and Celsius units (Temperature)
Unit of measure prefixes: nano, milli, micro, mega, and kilo
Continuity test
Diode test
4. Symbols Used on LCD Display

Range
40.00A
400.0A
Accuracy ±(% of reading+digits)
±(2.0% + 8 digits)
±(2.5% + 8 digits)
Function
DC Current
Over range protection: Maximum input 400A.
Resolution
10mA
100mA
Range
40.00A
400.0A
Accuracy ±(% of reading+digits)
±(2.0% + 8 digits)
±(2.5% + 8 digits)
Function
AC True RMS Current
Over range protection: Maximum input 400A.
Accuracy specified from 5% to 100% of the measuring range.
Frequency Response: 50Hz to 60Hz True RMS.
Inrush current Maximum Input: 400A Inrush current Sensitivity: >2A.
Resolution
10mA
100mA
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5. Specifications
400.0V ±(1.0% + 3 digits)
100mV
1000V ±(1.2% + 3 digits)
1V
Range
4.000V
40.00V
Accuracy ±(% of reading+digits)
±(1.0% + 3 digits)
±(1.0% + 3 digits)
Function
DC Voltage
Maximum input: 1000V DC
Resolution
1mV
10mV
400.0V ±(1.2% + 5 digits)
100mV
1000V ±(1.5% + 5 digits)
1V
Range
4.000V
40.00V
Accuracy ±(% of reading+digits)
±(1.2% + 5 digits)
±(1.2% + 5 digits)
Function
AC True RMS Voltage
Variable frequency Drive TEST AC voltage range: 100V---600V.
AC voltage bandwidth: 50 to 1000Hz (sine) 50/60 (all wave)
Accuracy specified from 5% to 100% of the measuring range
Maximum Input: 1000V AC RMS.
PEAK Maximum Input: 1000V
Resolution
1mV
10mV
(with VFD)
40.00kΩ±(1.5% + 2 digits)
10Ω
400.0kΩ±(1.5% + 2 digits)
100Ω
Range
400.0Ω
4.000kΩ
Accuracy ±(% of reading+digits)
±(1% + 4 digits)
±(1.5% + 2 digits)
Function
Resistance
Input Protection: 300V DC or 300V AC RMS
Resolution
0.1Ω
1Ω
4.000MΩ±(2.0% + 5 digits)
1kΩ
40.00MΩ±(3.0% + 8 digits)
10kΩ

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(Auto-ranging)
99.99mF ±(5% + 5 digits)
0.01mF
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9.999µF 0.001µF
99.99µF ±(3.0% + 5 digits)
0.01µF
Range
99.99nF*
999.9nF
Accuracy ±(% of reading+digits)
±(4.5% + 20 digits)
Function
Capacitance
Input Protection: 300V DC or 300V AC RMS.
* < 99.99nF (no specification)
Frequency with test leads (AC Voltage)
Resolution
0.01nF
0.1nF
999.9µF 0.1µF
9.999mF 0.001mF
Range
10Hz to 100kHz
Accuracy ±(% of reading+digits)
±(1.0% + 5 digits)
Function
Frequency
Input Protection: 1000V AC RMS
Sensitivity: > 15V AC RMS
Frequency (AC Current)
(Auto-ranging)
Range
45Hz to 1kHz
Accuracy ±(% of reading+digits)
±(1.0% + 5 digits)
Function
Frequency
Sensitivity: > 20A
(Auto-ranging)
Range
20.0% to 80.0%
Accuracy ±(% of reading+digits)
±(1.2% + 10 digits)
Function
Duty Cycle
Resolution
0.1
Sensor: Type K Thermocouple
Input Protection: 300V DC or 300V AC RMS.
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Range
-20.0 to 1000°C
-4.0 to 1832°F
Accuracy ±(% of reading+digits)
±(3% + 3°C)
Function
Temperature
Resolution
0.1/1°C
0.1/1°F
(Type-K) ±(3% + 5°F)
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Input Protection: 300V DC or 300V AC RMS.
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Testing Condition
Forward DCA is approx .1mA,
open circuit voltage MAX 3V
Reading
Forward voltage drop of Diode
Function
Diode
Test current MAX 1.5mA
While resistance is less than (50Ω)
Buzzer makes a long sound,
Continuity

9
Clamp jaw opening
Display
Low Battery indication
Over-range indication
Measurement rate
Temperature sensor
Input Impedance
AC response
ACV Bandwidth
Operating Temperature
Storage Temperature
Operating Humidity
Storage Humidity
Operating Altitude
Battery
Battery life
Auto power OFF
Dimensions
Weight
Safety
30mm approx.
3-3/4 digits (4000 counts) backlit LCD
‘ ' is displayed
'OL' display
3 readings per second, nominal
Type K thermocouple
10M (VDC and VAC)
True RMS (AAC and VAC)
2KHZ
5°C to 40°C (41°F to 104°F)
-20°C to 60°C (-4°F to 140°F)
Max 80% up to 31°C decreasing linearly to
50% at 40°C
<80%
2000 meters maximum.
Three (3) x 1.5V AAA Battery
~30h (backlight ON), ~100h (backlight OFF)
After approx. 15 minutes
220 x 80 x 39mm
305g
For indoor use and in accordance with the
requirements for double insulation to
IEC1010-1 (2001): EN61010-2-030
EN61010-2-032 EN61010-2-033 Overvoltage
Category lll 600V, Pollution Degree 2.
6. General Specifications

10
7. 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.
7.1. AC/DC 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 400A range. If the approx. range of the
measurement is not known, select the highest range then move to the
lower ranges if necessary.
2. Press the REL button to zero the meter display.
3. Use Rotary Function switch to select AC or DC 40A 400A range.
4. Use MODE Button to select AC or DC.
5. Select AC current Test, press the INRUSH key to turn Inrush current test,
the LCD will display "----".
6. Press the trigger to open jaw. Fully enclose only one conductor. For
optimum results, center the conductor in the jaw.
7. The clamp meter LCD will display the reading.
CORRECTINCORRECT