User manual

29
Carrying out Measurements
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In no event exceed the max. permitted input values within the over-
voltage category III. The frequency of the alternating volumes may
not exceed 400Hz! Do not contact circuits or parts of circuits if there
could be higher voltages than 25V ACrms or 35V DC pending within
them ! Danger! Before measuring, check the connected measuring
lines for damage such as, for example, cuts, cracks or squeezing.
Replace defective measuring lines immediately by new ones, defec-
tive measuring lines may not be used any longer! Danger!
a) Voltage measurement
Proceed as follows to measure AC/DC voltages:
- Connect the black measuring line with the COM socket
(7) and the red measuring line with the VΩ-socket (6) till
they are plane at the measuring instrument .
- Set the range selection switch (5) to position "V".
- Press the "MODE" button (9) additionally for measuring
AC voltages.
- Now connect the two measuring prods to the object to
be measured (battery, switching etc.).
- In the display (1), the polarity of the measuring value
concerned will be indicated together with the current
measuring value.
The voltage range "V" shows an input resistance of approx. 10MOhm. As soon as a
minus "-" appears for the direct voltage in front of the measuring value, the measu-
red voltage is negative (or the measuring prods have been mixed up).
Note: Due to the fact that the measuring input is very sensitive, it is possible that any
measuring values ("phantom measuring values") will be indicated if the measuring
wires are free (not connected to an object to be measured). This "phenomenon" is
normal and disappears as soon as you perform your measurement.