Maintenance And Cleaning - VOLTCRAFT SL-100 Bedienungsanleitung

To facilitate reading of the display during twilight or in darkness, the
display of Model SL-200 can be lit up. To do this, press the button
with the light symbol (5). Press this button again to switch off the
meter.
When not in use, switch the display lighting and/or the meter off.

Maintenance and cleaning

The power units are maintenance-free apart from the need to
replace the batteries and cleaning it once in a while. Use a clean,
lint-free, antistatic and slightly damp cloth to clean the device. Do
not use any abrasive or chemical agents or detergents containing
solvents.
Replacing the battery
If the battery symbol „BAT" appears in the display, the batteries
have to be replaced as soon as possible to prevent inaccurate mea-
surements.
Proceed as follows to replace the batteries:
- Switch off the meter.
- Loosen the battery compartment screw on the back of the
device, and slide the lid off in the direction of the arrow.
- Replace the flat battery with a new one of the same type (e.g.
1604A).
- Carefully close the meter in reverse order to its opening
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MAX function
Only the maximum value is shown in the display during continuous
measurements. This measurement function makes it easier for you
to determine the peak level. The active function is shown in the dis-
play by „MAX".
Press the „MAX" button to activate this function. Press again to
switch back to the continuous measuring mode
Frequency evaluation of A/C-curve
The frequency evaluation for the measured signal is done using two
evaluation curves.
Curve A represents the characteristic hearing curve of the human
ear. Lower sounds seem quieter than middle or high frequency
sounds to the human ear.
Curve C evaluates this frequency range linearly and without a filter
(actual sound level).
Press the „A/C" button to switch over to this filter. The active filter is
shown in the display by „dBA" or dBC".
Switching-over the measurement range between Hi/Lo
The sound level detector has two overlapping measurement ranges.
The lower, Lo-range is from 30 to 100 dB and the higher, Hi-range is
from 60 to 130 dB.
„OVER" is shown in the display if the level falls below or exceeds
one of these ranges. In this case, switch-over to the lower/higher
range.
Press the „Hi/Lo" button to switch between ranges.
FAST/SLOW time evaluation
The signal can be measured using two different measurement inter-
vals.
The time evaluation must be set to „FAST" for sound levels that
change rapidly (horns, shots, etc.).
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