Major tech MT25, Instruction Manual, Page: 8 / 16

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5.6. AC/DC Voltage Measurements
1. Set the rotatory function switch to the V ~
position.
2. Press the MODE button to select AC or DC voltage.
The AC “ ” or DC “ ” symbol will appear on the ~
LCD display.
3. Insert the black test lead into the COM input jack
and the red test lead into the V input jack.
4. Touch the test lead probes to the circuit under test. 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.
Observe all safety precautions when working on live circuits.
!
WARNING:
5.7. Frequency And % Duty Cycle Measurements
1. Set the rotary function switch to the position. HZ %
2. Press the button to select frequency or MODE %
duty cycle. The “ ” or “ ” symbol will appear on Hz %
the LCD display.
3. Insert the black test lead into the input jack COM
and the red test lead into the input jack. V
4. Touch the test lead probes to the circuit under test.
5. Read the frequency or % duty cycle on the LCD
display.
5.8. AC Current Measurements
1. Set the rotary function switch to the 10A~ position.
2. Insert the black test lead into the COM input jack
and the red test lead into the 10A input jack.
3. Remove power from the circuit under test, then open
up the circuit at the point where you wish to
measure current.
4. Touch the test lead probes in series with the circuit
being measured.
5. Apply power to the circuit.
6. Read the current on the LCD display.
Observe all safety precautions when working on live voltages.
Do not measure frequency or duty cycle on circuits that exceed
600V.
!
WARNING:
Observe all safety precautions when working on live circuits. Do
not measure current on circuits that exceed 250V. Measurements
in the 10A range should be limited to 30 seconds maximum every
15 minutes. Max voltage 600V.
!
WARNING: