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c) Current measurement "A"
Never exceed the maximum allowable input values. Do not touch circuits or parts of
circuits if there could be voltages higher than 25 VACrms or 35 VDC in them! This
could pose a life-threatening danger!
The maximum permissible voltage in the current measuring circuit must not exceed
1000 V in CAT III. Measurements >5 A may only be carried out for a maximum of 10
seconds and only in 10 minute intervals.
Always start the current measurement with the largest measuring range and switch to a smaller
measuring range if necessary. Always unplug the circuit before changing the measuring range.
All current measuring ranges are fused and thus protected against overload.
Proceed as follows to measure direct current (A
1. Turn on the DMM and select the measuring range "A
"mA
" or "μA
".
2. The various measuring functions and the possible measuring
ranges can be seen in the table. Select the measuring range
and the associated measuring socket.
Measuring
Measuring range Measuring
function
sockets
μA
0.01 μA - 6000 μA COM + mAμA
mA
0.001 mA - 600 mA COM + mAμA
10A
0.001 A - 10 A
COM + 10A
3. Insert the red test lead in the mAμA or 10A measuring
socket (5, 6). Insert the black test lead in the COM measuring
socket (8) (Fig. 3).
4. Connect the two test prods in series with the object to be
measured (battery, circuit, etc.); the polarity of the measured
value will be displayed with the current measured value.
If a minus "-" appears in front of the measured value when measuring direct current, the current
is flowing in the opposite direction (or the test leads are reversed).
5. After the measurement has been completed, remove the test leads from the object being
measured and turn the DMM off.
60
):
",
Fig. 3
Proceed as follows to measure alternating current (A
1. Turn on the DMM and select the measuring range "A
2. Press the SHIFT/SETUP button (3) to switch to the AC measuring range. " ", "
appear in the display. Pressing the button again will switch back.
3. After the measurement has been completed, remove the test leads from the object being
measured and turn the DMM off.
Never measure currents over 10 A in the 10 A range or currents over 600 mA in the
mA/μA range, because this will trip the fuses.
d) Frequency measurement / duty cycle in %
The DMM can measure and display signal voltage frequencies from 10 Hz - 60 MHz.
Proceed as follows to measure frequencies:
1. Turn on the DMM and select the measuring range
"mV
Hz %". Press the SHIFT/SETUP button (3) until "Hz"
appears in the display.
2. Insert the red test lead in the °CHzVΩ measuring socket (7),
the black test lead in the COM measuring socket (8) (Fig. 4).
3. Connect the two test prods with the object to be measured
(signal generator, circuit, etc.).
4. The frequency will be displayed with the appropriate unit.
5. To measure the duty cycle, press the SHIFT/SETUP button
again until "%" appears in the display.
6. After the measurement has been completed, remove the test
leads from the object being measured and turn the DMM off.
).
", "mA
" oder "μA
".
" or "
" will
Fig. 4
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