8
8
3. FUNCTIONS
3.1 Switch functions
To access the
,
,
,
,
,
, or
function, turn the switch to the selected function
position. Every position (except OFF) is confirmed by a beep.
3.1.1
Measurement types
Below are the possible combinations depending on the type of measurement:
Measurement types
Max / Min
Auto / Range
LowZ AC,
AC,
AC+DC,
AC,
AC+DC,
AC,
AC+DC
9
-
9
DC,
DC,
DC
9
9
9
60 mV DC,
9
9
-
60 mV AC,
60 mV AC + DC
9
-
-
9
9
9
9
9
9
3.1.2 Voltage measurement
The instrument measures the following types of voltages:
DC voltage with high impedance (DC);
AC voltage with high impedance (AC);
DC voltage and AC voltage with high impedance (AC+DC);
AC voltage with low impedance (V
LowZ
)
In all cases, "OL" appears beyond 1050 V and a beep sounds when the reading exceeds 600 V.
Volt
V
LowZ
:
This position is designed for measurements on electrical installations. The input impedance < 1 M
Ω
is used
to avoid measuring "phantom" voltages caused by coupling between the lines.
Thanks to the low pass filter, it is possible to measure the RMS voltage supplied by an MLI variable speed drive (for
asynchronous motors).
In V
LowZ
, the measurement signal goes through the low pass filter with a cut-off frequency of < 300 Hz. When
measuring a voltage with a frequency in excess of 150 Hz, it is considerably reduced and therefore a significant
error can occur. In this case the position
which uses the entire bandwidth should be used.
