Major tech MTD15 Manuale utente
MTD15
400A AC CLAMP METER
INSTRUCTION MANUAL
2
Contents Page no
3
1. Safety.......................................................................................4
1.1. International Safety Symbols..............................................4
1.2. Safety Notes.......................................................................4
1.3. Warnings............................................................................4
1.4. Cautions.............................................................................4
3. Specifications.........................................................................6
4. Operation................................................................................7
4.1. AC Current Measurements.............................................7
4.2. AC/DCVoltage Measurements........................................7
4.3. Resistance and Continuity Measurements......................7
4.4. Diode Measurements.....................................................7
4.5. Data Hold........................................................................8
4.6. AC Voltage Measurement...............................................8
4.7. Manual Ranging.............................................................8
4.8. Backlight.........................................................................8
4.9. Battery Replacement......................................................8
4
1. SAFETY
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.
!
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.
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 240V.
• When changing ranges always disconnect the test leads from the circuit
under test.
• Do not exceed the maximum rated input limits.
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.
Inspect the condition of the test leads and the meter itself for any damage
before operating the meter. Repair or replace any damage 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.
Remove the battery if the meter is to be stored for long periods.
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
Function Maximum Input
A AC 400A
V DC, V AC 600V DC/AC
Resistance, Diode, Continuity Test 250V DC/AC
Input Limits
1 - Current clamp
2 - Clamp trigger
3 - Rotary Function switch
4 - LCD display
5 - MAX Hold button
6 - Data Hold button
7 - Mode select button
8 - Range select button
9 - Backlight button
10 - COM input jack
11 - V Ω jack
12 - Battery Cover
2. METER DESCRIPTION
1. AC DC AC (alternating current)
and DC (direct currrent)
2. Minus sign
3. 1.8.8.8 2000 count (0 to 1999)
measurement reading
4. AUTO AutoRange mode
5. MAX MAX Hold mode
6. Diode test mode
7. Audible Continuity
8. HOLD Data Hold mode
9. BAT Low Battery icon
10. ℃,℉,m,V, Units of measure list
A,K,M,Ω
1
5
6
7
8
10
12
11
9
4
3
2
6
3. SPECIFICATIONS
Function Range & Resolution Accuracy (% of Reading
AC Current 2.000 AAC ±(2.5%+10digits)
20.00 AAC ±(2.5%+4 digits)
200.0 AAC
400 AAC ±(3.0%+4 digits)
DC Voltage 200.0 mVDC ± (0.5%+5 digits)
2.000 VDC
20.00 VDC ± (1.2% +3 digits)
200.0 VDC
600 VDC ± (1.5% +3 digits)
AC Voltage 200.0 mVAC ± (1.5% + 30 digits)
2.000 VAC
20.00 VAC ± (1.5% + 3 digits)
200.0 VAC
600 VAC ± (2.0% + 4 digits)
Resistance 200.0 Ω ± (1.0% + 4 digits)
2.000KΩ
20.00KΩ ± (1.5% + 2 digits)
200.0KΩ
2.000MΩ ± (2.0% + 3 digits)
20.00MΩ ± (3.0% + 5 digits)
NOTE: No Auto Ranging & 200mV AC Voltage Range.
7
Function Range
3. SPECIFICATIONS continued....
Clamp size Opening 23mm (0.9") approx.
Diode Test Test current of 0.3mA typical; Open circuit
voltage 1.5V DC typical.
Continuity Check Threshold <120Ω; Test current < 1mA
Low Battery Indication " BAT" is displayed
Overrange Indication "OL " is displayed
Measurements Rate 2 per second, nominal
Input Impedance 7.8MΩ (VDC and VAC)
Display 3-1/2 digits (2000 counts) LCD
AC Current bandwidth 50/60Hz (AAC)
AC Voltage bandwidth 50/400Hz (VAC)
Operating Temperature -10 to 50°C (14 to 122°F)
Storage Temperature -30 to 60°C (-14 to 140°F)
Relative Humidity 90%(0°C to 30°C); 75%(30°C to 40°C);
45%(40°C to 50°C)
Altitude Operating: 3000m; Storage 10,000m
Over voltage Category III 600V
Battery Two 1.5V "AAA" Batteries
Auto OFF approx. 15 minutes
Dimensions/Weight 200x50x35mm/200g
Safety For indoor use and in accordance with
Overvoltage Category II, Pollution Degree 2.
Category II includes local level, appliance,
portable equipment, etc., with transient
overvoltages less than Overvoltage Cat. III
4. OPERATION
WARNING: Ensure that the test leads are disconnected from the
meter before making current clamp measurements.
NOTE: Read and understand all warning and precaution statements listed
in the safety section of this operation manual prior to using this meter. Set
the function select switch to the OFF position when the meter is not in use.
4.1. AC Current Measurements
8
1. Set the Function switch to the 400A or 200A or 20A or 2A range. If the
range of the measured is not known, select the higher range first then
move to the lower range if necessary.
2. Press the trigger to open jaw. Fully enclose one conductor to be
measured.
3. The clamp meter LCD will display the reading.
4.2. AC/DC Voltage Measurements
1. Insert 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 V position.
3. Select AC or DC with the MODE button.
4. Connect the test leads in parallel to the circuit under test.
5. Read the voltage measurement on the LCD display.
4.3. Resistance and Continuity Measurements
1. Insert the black test lead into the negative COM terminal and the red
test lead into the positive terminal.
2. Set the function switch to the Ω position.
3. Use the multifunction MODE button to select resistance.
4. Touch the test probe tips across the circuit or component under test. It is
best to disconnect one side of the device under test so the rest of the
circuit will not interfere with the resistance reading.
5. For Resistance tests, read the resistance on the LCD display.
6. For Continuity tests, if the resistance is < 120Ω, a tone will sound.
4.4. Diode Measurements
1. Insert the black test lead banana plug into the negative COM jack and
the red test lead banana plug into the positive diode jack.
CORRECTINCORRECT
9
2. Turn the rotary switch to the position.
3. Press the MODE button until " " appears in the display.
4. Touch the test probes to the diode under test. Forward voltage will
indicate 0.4V to 0.7V. Reverse voltage will indicate "OL". Shorted devices
will indicate near 0mV and an open device will indicate "OL" in both
polarities.
4.5. Data Hold
To freeze the LCD meter reading, press the data hold button. The data hold
button is located on the left side of the meter (top button). While data hold
is active, the DH display icon appears on the LCD. Press the data hold
button again to return to normal operation.
4.6. MAX Hold
To hold the highest reading on the LCD, press the MAX hold button. The
MAX hold button is located on the left side of the meter (bottom button).
The meter reading will not change as readings change, rather it will only
display the highest reading encountered since the MAX hold button was
pressed. Press the MAX hold button again to return to normal operation.
4.7. Manual Ranging
The meter turns on in the autoranging mode. Press the Range button to
go to manual ranging. Each press of the range button will step to the next
range as indicated by the units and decimal point location. Press and hold
the Range button for two seconds to return to autoranging. Manual
ranging does not function in the AC Current, Diode and Continuity check
functions.
4.8. Backlight
The backlight function illuminates the display and is used when the ambient
light to too low to permit viewing of the displayed readings. Press the
button for one second to turn the backlight on and press the button a
second time to turn the backlight off.
4.9.Battery Replacement
1. Remove the one rear Phillips head screw
2. Open the battery compartment
3. Replace the Requires two "AAA" batteries (UM4 R03)
4. Re-assemble the meter
Indice
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