26
SV106A User Manual
2. Select appropriate filter: for hand-arm transducer
–
BL Wh
, for whole-
body transducer
–
BL Wk
or equivalent.
3. Select the calibrator signal level.
4. Attach the vibration
calibrator to the instrument’s accelerometer.
5. Switch on the calibrator and wait approximately 30 seconds before
starting the system check measurement.
6. Start the calibration measurement by pressing the
<Start/Stop>
push-
button.
The measurement starts after 5
seconds’ delay. The measurement time for
system check is also predefined to 5 seconds. During calibration, the
<ESC>
and
<Pause>
push-buttons do not operate but it is possible to stop
the measurement using the
<Start/Stop>
push-button.
Waiting for the calibration measurement to begin, a
Delay
is counted down.
Measurement results in relationship with
calibrator level will be compared against
current calibration factor and the instrument
will assess whether the system check was
successful or failed, displaying relevant
message together with current calibration
factor and measured calibration.
System check is considered successful in
case its result is not more than 2 dB different
than the current calibration factor.
Press
<ENTER>
to exit
System Check
.
4.2.4.
Calibration by transducer's sensitivity
– Calibr. By Sensitivity
Calibration by introducing the accelerometer’s individual sensitivity can be
performed in the following way:
1. Select the
Calibr. By Sensitivity
position from the
Calibration
sub-list
and press the
<ENTER>
push-button.
2. Set the sensitivity of the accelerometer using information taken from its
calibration certificate using the
<
>, <
>
push-buttons (or combination
of the
<Shift>
and
<
>, <
>
push-buttons).
The calibration factor is calculated, after pressing the
<
>, <
>
push-
buttons, in the relation to 10.0 mV / ms
-2
. For the sensitivity of the
accelerometer higher than 10.0 mV / ms
-2
the calibration factor will always
be negative.