Major tech MT720 Manuel utilisateur
MT720
AC TRMS
CLAMP METER
INSTRUCTION MANUAL
II
2
Contents Page no
3
1.2. SAFETY NOTES ............................................................. .4
5. Specifications ....................................................................... 7
7. Operation ............................................................................. 10
7.5 .Capacitance Measurements ........................................... 11
6. General Specifications ......................................................... 9
7.9. Continuity Measurements ............................................... 13
1. Safety ..................................................................................... 4
7.8. Diode Test ....................................................................... 12
1.4. CAUTIONS ....................................................................... 4
7.1. AC Current Measurement ............................................... 10
7.2. AC Voltage Measurement .............................................. 11
2. lnput Limits ............................................................................ 5
3. Meter Description .................................................................. 5
1.3. WARNINGS ...................................................................... 4
1.1. lnternational Safety Symbols ............................................ 4
4. Symbols Used on LCD Display ............................................. 6
7.3. DC Voltage Measurement ............................................... 11
7.4. Resistance ...................................................................... 11
7.6. Frequency Measurements .............................................. 12
7.7. Temperature Measurements ........................................... 12
7.11. MODE/VFD ................................................................... 13
7.12. HOLD/Flashlight ........................................................... 13
716. Automatic Power OFF .................................................... 14
7.15. Relative/Backlight ......................................................... 14
8. Maintenance ........................................................................ 15
9. Cleaning and Storage ......................................................... 15
10. Battery Replacement .......................................................... 15
11. Temperature Probe Replacement ..................................... 15
7.14. PEAK/INRUSH ............................................................. 14
7.10. Non-Contact AC Voltage Measurements ...................... 13
7.13. RANGE ........................................................................ 14
Double insulation.
Application around and removal from uninsulated hazardous
live conductors is permitted.
This symbol, adjacent to a terminal, indicates that, under
normal use,hazardous voltages may be present.
This symbol, adjacent to another symbol or terminal, indicates
the user must refer to the manual for further information.
4
1. Safety
!
1.1. lnternational Safety Symbols
• Set the function switch OFF when the meter is not in use.
• Do not exceed the maximum allowable input range of any function.
1.3. WARNINGS
1.2. SAFETY NOTES
• Remove the battery if meter is to be stored for longer than 60 days.
• 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.
• Do not apply voltage to meter when resistance function is selected.
• 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.
5
2. Input Limits
2. Current clamp
6. LCD display
1. NCV Test
4. Clamp trigger
3. Non-contact AC voltage
indicator light
5. REL button
7. RANGE button
3. Meter Description
9. Data Hold and Backlight button
13. V Ω Diode Continuity CAP TEMP
Hz% jack
14. Battery Cover
8. COM input jack
11. MODE select and Flashlight button
10. Rotary Function switch
12. INRUSH and PEAK button
1
2
3
4
5
6
7
8
9
11
12
13
14
10
A AC
V AC/DC
Resistance, Capacitance,
Frequency, Diode Test,
Temperature
400A
1000V DC/AC
300V DC/AC
Function Maximum Input
6
REL/DCA Zero
Auto Range mode
Direct/ Voltage
Low battery
Milli-volts or Volts (Voltage)
(Resistance)
Fahrenheit and Celsius units (Temperature)
Farad (Capacitance)
Continuity test
Diode test
Unit of measure prefixes: nano, milli, micro, mega, and kilo
Data Hold
Amperes (Current)
Auto Power Off
Alternating Current Voltage
Hertz (Frequency)/Percent (duty ratio)
Negative reading display
Measurement display digits
Maximum/Minimum
4. Symbols Used on LCD Display
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
7
5. Specifications
Range
40.00A
400.0A
Accuracy ±(% of reading+digits)
±(2.0% + 8 digits)
±(2.5% + 8 digits)
Function
AC True RMS Current
Inrush current Maximum Input: 400A Inrush current Sensitivity: >2A.
Over range protection: Maximum input 400A.
Accuracy specified from 5% to 100% of the measuring range.
Frequency Response: 50Hz to 60Hz True RMS.
Resolution
10mA
100mA
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
AC voltage bandwidth: 50 to 1000Hz (sine) 50/60 (all wave)
Variable frequency Drive TEST AC voltage range: 100V---600V.
Accuracy specified from 5% to 100% of the measuring range
Maximum Input: 1000V AC RMS.
PEAK Maximum Input: 1000V
Resolution
1mV
10mV
(with VFD)
8
(Auto-ranging)
99.99mF ±(5% + 5 digits)
0.01mF
7
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
Frequency with test leads (AC Voltage)
* < 99.99nF (no specification)
Input Protection: 300V DC or 300V AC RMS.
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
Input Protection: 300V DC or 300V AC RMS.
Sensor: Type K Thermocouple
7
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)
7
Input Protection: 300V DC or 300V AC RMS.
7
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
Measurement rate
Operating Temperature
Clamp jaw opening
Over-range indication
AC response
Temperature sensor
ACV Bandwidth
Display
Low Battery indication
Input Impedance
Storage Temperature
Operating Humidity
Operating Altitude
Battery
Auto power OFF
Dimensions
Safety
Battery life
Storage Humidity
Weight
2KHZ
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)
-20°C to 60°C (-4°F to 140°F)
<80%
Max 80% up to 31°C decreasing linearly to
50% at 40°C
2000 meters maximum.
5°C to 40°C (41°F to 104°F)
220 x 80 x 39mm
305g
EN61010-2-032 EN61010-2-033 Overvoltage
Category lll 600V, Pollution Degree 2.
~30h (backlight ON), ~100h (backlight OFF)
After approx. 15 minutes
Three (3) x 1.5V AAA Battery
For indoor use and in accordance with the
requirements for double insulation to
IEC1010-1 (2001): EN61010-2-030
6. General Specifications
10
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.
5. Press the trigger to open jaw. Fully enclose only one conductor. For
optimum results, center the conductor in the jaw.
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 Current Measurements
WARNING: Ensure that the test leads are disconnected from the meter
before making current clamp measurements.
3. Use Rotary Function switch to select AC 40A 400A range.
7. Operation
4. Select AC current Test, press the INRUSH key to tum Inrush current
test, the LCD will display "----".
6. The clamp meter LCD will display the reading.
2. Press the REL button to zero the meter display.
CORRECTINCORRECT
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