Svantek SV 977D - Calibration by Sensitivity (Vibration Signal); Calibration by Measurement (Acoustic Signal)

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SV 977D User Manual
For microphones with sensitivity over 35.0 mV/Pa, the calibration factor will be
negative. For microphones with sensitivity less than 35.0 mV/Pa, the calibration
factor will 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).
To confirm the new calibration factor, press <ENTER>, or press <ESC> to return
to the Calibration list without changes.
3.3.3 Calibration by Sensitivity (Vibration signal)
The calibration by using the accelerometer’s published sensitivity information
can be performed in the following way:
1. Open the Calibr. by Sensitivity position in the Calibration list.
2. Set the Sensitivity of the accelerometer taken from its calibration certificate
using the ◄ / ► key.
The calibration factor (Cal. Factor) is calculated every time after pressing the
◄ / ► key, in relation to the nominal value of 10.0 mV/ms
-2
.
For accelerometers with sensitivity less than 10.0 mV/ms
-2
, the calibration factor
will be positive. For accelerometers with sensitivity over 10.0 mV/ms
-2
, the
calibration factor will be negative.
The lowest applicable value of the accelerometer sensitivity is equal to
10.0
V/ms
-2
(60.0dB calibration factor) and the highest one is equal to
10.0V/ms
-2
(-60.0dB calibration factor).
3. To confirm the new calibration factor, press <ENTER>, or press <ESC> to
return to the Calibration list without changes.
3.3.4 Calibration by Measurement (Acoustic signal)
Calibration by measurement of the acoustic signal can be done in the following
way:
1. Open the Calibr. by Measurement position in the Calibration list.
2. Set the reference calibration level (Cal. Level).
3. Attach the acoustic calibrator SV 36 (or equivalent 114 dB@1000 Hz)
carefully over the microphone of the instrument.
Note: It is also possible to use an electro-mechanical pistonphone, which generates a signal (ca
124 dB) or different type of acoustic calibrator dedicated for ½” microphones. It is also necessary to
switch the instrument Range to the High level.