Major tech MT730 Manual de usuario
INSTRUCTION MANUAL
AC TRMS
CLAMP METER
MT730
II
2
Contents Page no
3
1. Safety ..................................................................................... 4
2. Description ............................................................................ 5
2.1. Meter Description .............................................................. 5
2.2. Symbols Used on LCD Display .......................................... 6
3. Operation ............................................................................... 6
3.1. AC Current Measurements ................................................ 6
3.2. AC Voltage Measurement ................................................. 7
3.3. DC Voltage Measurement ................................................. 7
3.4. Resistance Measurement ................................................. 7
3.5. Capacitance Measurements ............................................. 8
3.6. Frequency Measurements ................................................ 8
3.7. Temperature Measurements ............................................. 8
3.8. Continuity Measurements ................................................. 8
3.9. Diode Test ......................................................................... 9
3.10. Non-Contact AC Voltage Measurements ........................ 9
4. Button ..................................................................................... 9
4.1. MODE/VFD Button ............................................................ 9
4.2. HOLD/Flashlight Button .................................................. 10
4.3. RANGE Button ............................................................... 10
4.4. PEAK/INRUSH Button .................................................... 10
4.5. REL/Backlight Button ...................................................... 10
5. Automatic Power OFF .......................................................... 11
6. Maintenance ......................................................................... 11
6.1. Cleaning and Storage .................................................... 11
6.2. Battery Replacement. ..................................................... 11
6.3. Temperature Probe Replacement .................................... 11
7. Specifications ...................................................................... 12
7.1. Specifications ................................................................. 12
7.2. General Specifications .................................................... 14
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.
4
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.
5
Input Limits
1. Non-Contact Voltage Detector
2. Current Clamp
3. Non-Contact Voltage Indicator
4. Clamp Trigger
5. Function Switch
6. LCD Display
7. HOLD and Flashlight Button
2. Description
2.1. Meter Description
8. REL and Backlight Button
9. RANGE Button
10. MODE and VFD Button
11. PEAK and INRUSH Button
12. Battery Cover
13. COM Input Jack
14. V,
Ω, ,CAP, TEMP Input Jack
A AC
V AC/DC
Resistance, Capacitance,
Frequency, Diode Test,
Temperature
600A DC/AC
1000V DC/AC
300V DC/AC
Function Maximum Input
1
2
3
5
4
6
7
8
9
10
11
12
13 14
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2.2. Symbols Used on LCD Display
1. REL/DCA Zero
2. Alternating CurrentNoltage
3. Direct Current/Voltage
4. Minus Sign
5. Low Battery
6. Auto Range Mode
7. INRUSH Current Mode 16.
Hertz [Frequency)
8. Maximum/Minimum
9. Display Hold
10. Variable Frequency Drive Voltage
Value
11. Diode Test
12. Continuity
13. Auto Power Off
14. Fahrenheit and Celsius Units
(Temperature)
15. Unit of Measure Prefixes
17. Percent (Duty Ratio)
18. The Displayed Area
3. 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.
3.1. 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 600A 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 60A 600A range.
4. Press the trigger to open jaw. Fully enclose only one conductor. For
optimum results, center the conductor in the jaw.
5. The clamp meter LCD will display the reading.
1
3
4
2
5
14
789 10 11 12 136
15
16
17
18
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3.4. Resistance
1. lnsert the black test lead into the negative COM terminal and the red
test lead into the V positive terminal.
2. Set the function switch to the
Ω.CAP position.
3. Touch the test probe tips across the circuit or component under test.
4. Read the resistance on the LCD display.
3.2. AC Voltage Measurement
1.lnsert the black test lead into the negative COM terminal and the red
test lead into the positive V terminal.
2. Set the function switch to the VAC position.
3. Connect the test leads in parallel to the circuit under test.
6. Read the voltage measurement on the LCD display.
3.3. DC Voltage Measurement
1. lnsert the black test lead into the negative COM terminal and the red
test lead into the positive V terminal.
2. Set the function switch to the VDC position.
3. Connect the test leads in parallel to the circuit under test.
4. Read the voltage measurement on the LCD display.
CORRECTINCORRECT
8
3.5. 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 positive jack.
3. Touch the test probe tips across the part under test. If "OL" appears
in the display, remove and discharge the component.
4. Read the capacitance value in the display.
5. The display will indicate the proper decimal point and value.
Note: For very large values of capacitance measurement it can take
several minutes before the final reading stabilizes.
3.6. Frequency Measurements
1. lnsert the black test lead banana plug into the negative COM jack and
the red test lead banana plug into the V positive jack.
2. Set the function switch to the V~HZ/% Position.
3. Press MODE button to select the Frequency (Hz) or Duty cycle (%).
4. Touch the test probe tips across the part under test.
5. Read the value on the display.
6. The display will indicate the proper decimal point and value.
3.7. Temperature Measurements
1. Set the function switch to the TEMP position.
2. lnsert the Temperature Probe into the negative COM and the
V positive jacks, observing polarity.
3. Touch the Temperature Probe head to the device under test.
Continue to touch the part under test with the probe until the
reading stabilizes.
4. Read the temperature on the display. The digital reading will indicate
the proper decimal point and value.
5. Use the MODE button to select °F or °C.
WARNING: To avoid electric shock, be sure the thermocouple probe has
been removed before changing to another measurement function.
3.8. Continuity Measurements
1. lnsert the black test lead into the negative COM terminal and the red
test lead into the V positive terminal.
2. Set the function switch to the 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. lf the resistance is < 50Ω, a tone will sound.
9
3.9. Diode Test
1. lnsert the black test lead banana plug into the negative COM jack
and the red test lead banana plug into the V positive jack
2. Turn the function switch to position.
3. Use the MODE button to select the diode function if necessary
(diode symbol will appear on the LCD when in Diode test mode)
4. Touch the test probe tips to the diode or semiconductor junction
under test. Note the meter reading
5. 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 OL, the diode is good.
• If both readings display OL the device is open.
• If both readings are very small or '0', the device is shorted.
3.10. Non-Contact AC Voltage Measurements
WARNING: Risk of Electrocution. Before use, always test the Voltage
Detector on a known live circuit to verify proper operation
1. Touch the probe tip to the live conductor or insert into the live side of
the electrical outlet.
2. lf AC voltage is present, the detector light will illuminate.
NOTE: The conductors in electrical cord sets are often twisted. For best
results, rub the probe tip along a length of the cord to assure placing the
tip in close proximity to the live conductor.
NOTE: The detector is designed with high sensitivity. Static electricity or
other sources of energy may randomly trip the sensor. This is normal
operation.
4. Button
4.1. MODE/VFD (Variable Frequency Drive) Button
• Press MODE/VFD key to select the double measurement functions.
This key is active in VAC/Hz/%VFD,
Ω/CAP, position to select
among resistance test. diode test. continuity test. HZ%, and in
Temp position to select between ˚C or ˚F.
• Press and hold the MODE/VFD key and turn the selection switch to
turn the system on, the auto power off function will be cancelled.
• Press and hold the MODE/VFD key for 2 seconds to switch to VFD.
10
4.2. HOLD/Flashlight Button
• To freeze the LCD reading, press the Hold/Flashlight button.
• While data hold is active, the HOLD icon appears on the LCD.
• Press the Hold/Flashlight button again to return to normal
operation.
• Press the Hold/Flashlight button to turn the Flashlight on, Press
again to turn the Flashlight off.
4.3. RANGE Button
• Press the RANGE key to activate the manual mode and to disable
the Autorange function.
• The symbol "AUTO" disappears from the upper left part of the
display.
• In manual mode, press the RANGE key to change measuring
range: the relevant decimal point will change its position.
• The RANGE key is not active in positions , CAP, Hz%, Temp.
• In Autorange mode, the instrument selects the most appropriate
ratio for carrying out measurement.
• If a reading is higher than the maximum measurable value, the
indication "'0L'" appears on the display.
• Press and hold the RANGE key for more than 1 second to exit the
manual and restore the Autorange mode.
4.4. PEAK/INRUSH Button
• In AC voltage test mode, press PEAK/INRUSH key, the peak
maximum and peak minimum values can be measured.
• In current test mode, Press INRUSH key the inrush current values
are measured.
4.5. REL/Backlight Button
• Press the REL button to view the stored value. "REL" will flash in
the display.
• To exit this mode, press and Hold the REL button until "REL" is no
longer in the display.
• DCA measurements press the REL button to zero the display
• Press and hold the REL/Backlight button to turn the Backlight on,
press and hold again to turn the Backlight off.
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