4. The Batteries
4.1. Inserting the Batteries
The VM22 is supplied by three alkaline standard cell type AAA (LR03) batteries.
NiMH batteries (HR03) may also be used. The minimum energy requirement of the
VM22 enables maximum utilization of the batteries.
Attention: Please switch the instrument off before changing the batteries. When
switched off, the contents of the memory are stored for a few minutes, without need
of the batteries, and the internal clock continues to run. If the batteries are removed
when the instrument is switched on or if they remain in the instrument until the bat-
teries have been completely discharged, the device will perform a new start once the
batteries have been changed. Following a 'new start' the date and time will need to
be newly set. Further settings as well as the saved measurands, are stored without
need of the batteries.
To insert the batteries, remove the two screws from the back cover of the device and
open the battery compartment (4). When inserting the batteries, please ensure that
their polarity is correct, (see the engraved markings inside the compartment).
5
Figure 3: The Frequency Response of theVM22
1
10
100
1000
10000
0,001
0,010
0,100
1,000
10,000
Hz
m
m
/s
