Major tech MTD30 Betriebshandbuch - Seite 5
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3)
Read the result from the LCD panel.
Note: See DC voltage measurement note a)～d).
3.3
DC Current Measurement
1)
Set the selector switch to desired "mA
2)
Remove power from the circuit under test and open the normal circuit path
where the measurement is to be taken. Connect the meter in series with
the circuit.
3)
Read the result from the LCD panel. The polarity of the red lead connection will
be indicated along with the DC current value.
Note:
a)
If the current range is not known beforehand, set the selector switch to high
range and work down.
b)
When "1" or "-1" is display, over-range is being indicated and the selector switch
must be set to a higher range.
c)
The maximum input current is 500mA, the 0.5A/600V fuse protect the current
measuring circuits.
3.4
Resistance Measurement
1)
Set the selector switch to desired "Ω" position.
2)
Connect tip of the test leads to the points where the value of the resistance
is needed.
3)
Read the result from the LCD panel.
Note:
a)
If the resistance value being measured exceeds the maximum value of the range
selected, an over-range indication will be displayed ("1"), select a higher range.
For resistance of approximately 1 megohm and above, the meter may take a few
seconds to stabilize, this is normal for high resistance readings.
b)
When the input is not connected, i.e at open circuit, the sign "1" or "-1" will be
displayed for the over-range condition.
c)
When checking in-circuit resistance, be sure the circuit under test has all power
removed and that all capacitors are fully discharged.
3.5
Diode Test
1)
Set the selector switch to desired "
2)
Connect the test leads across the diode under measurement, display shows
the approx. forward voltage of this diode.
" position.
" position.
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