VOLTCRAFT MT-52 Bedienungsanleitung Seite 40

Note:
– As soon as a minus "-" appears for the direct voltage in front of the measured value, the measured voltage
is negative (or the measuring tips have been mixed up)�
– Use the "Hz%" button (11) to switch the display to frequency (Hz) and pulse length (%)� Each press switches
the function� Autorange is deactivated� This enables monitoring of possible ripple voltage (superimposed
alternate voltage)� In case of pure direct voltage, the frequency and % displays are "zero"� Without a meas-
ured signal, phantom values may be displayed� They disappear when a direct voltage is measured�
11.3 Current measurement "A"
The voltage in the measuring circuit may not exceed 600 V�
Do not measure any currents above 10 A in the 10A range and no currents above 400 mA in the µA/mA
range, otherwise the fuses trigger�
Measuring >5 A may only be performed for max� 30 seconds and at 15 minute intervals�
Always start current measurements at the highest measurement range and switch down to lower ranges if necessary�
Before changing the measurement range, always shut off the circuit� All current measuring ranges are secured with
fuses and thus protected against overload�
Proceed as follows to measure "A-DC" direct current:
1
1� Turn the DMM on and select measuring function "A"�
The table shows the different measuring functions and possible
measuring ranges� Select your measuring range and the respective
measuring jacks� The display indicates "DC"�
Measuring func-
tion
μA
mA
10A
2� Insert the red measuring line into the µA/mA or 10A measuring jack�
Plug the black measuring line into the COM socket�
3� Now connect the two measuring prods in series to the object to be
measured (battery, switch etc�)� The polarity of the respective measured value is indicated on the display together
with the measured value�
Note:
– When a minus "-" appears in front of the measured value when measuring DC, the measured voltage is
negative (or the measuring lines have been swapped)�
4� After measuring, remove the measuring lines from the measured object and turn the DMM off�
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Measuring range
<4000 μA
4mA – 399 mA
400 mA – 10A
Measuring jacks
COM + mAμA
COM + mAμA
COM + 10A