28
SVANTEK 977W User Manual
2.
Set the sensitivity of the microphone taken
from its calibration certificate using the
<Shift>
with
◄ or ► push-buttons and
then press
<ENTER>.
After pressing the
<ENTER>
push-button and
confirmation by selecting
Yes
in the screen
with answer “Are you sure?” the calibration
factor is calculated, in relation to the nominal
value of 35.0 mV / Pa.
<ENT>
To avoid the calculation, the user should select
No
in the screen with answer “Are you sure?”.
For a microphone with sensitivity higher than 35.0 mV / Pa the calibration factor
will always be negative.
For a microphone with sensitivity lower than 35.0 mV / Pa the calibration factor
will always be positive.
The lowest available value of the sensitivity that can be introduced is equal to
35.0
µV / Pa (it conforms to the calibration factor equal to 60.0 dB) and the
highest value is equal to 35.0 V / Pa (calibration factor is equal to -60.0 dB).
If the new calibration factor differs more than
±1.1 dB from the factory one, or the last
changed by the authorised service, the
instrument will not save it.
A special warning will appear on the screen.
<ENT>
To return to the
Calibration
sub-list, the user should press the
<ESC>
push-button.
4.3.3.
Calibration by Sensitivity in case of Vibration signal
The calibration by using the accelerometer’s published sensitivity information
can be performed in the following way:
1.
Select the
Calibr. by Sensitivity
position in the
Calibration
sub-list and
press the
<ENTER>
push-button.
2. Set the sensitivity of the accelerometer taken from its calibration certificate
using the
<Shift>
with
◄ or ► push-buttons and then press
<ENTER>
.
After pressing the
<ENTER>
push-button and confirmation by selecting
Yes
in
the screen with answer “Are you sure?” the calibration factor is calculated in
relation to the nominal value of 10.0 mV / ms
-2
.
To avoid the calculation, the user should select
No
in the screen with answer
“Are you sure?”.
