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SVANTEK 977W User Manual
that the instrument is in the measurement process. To change the sensitivity, the current
measurement in progress must be finished!
4.3.1. System Check
ISO 8041 standard advises users to perform in-situ checks of measurement
instrumentation. Checking should be carried out immediately before and after
measurements are made.
1. Select
System Check
in the
Calibration
sub-list and press the
<ENTER>
push-button.
2. Select the calibrator signal level.
3. Attach the vibration calibrator to the
instrument’s accelerometer.
4. Switch on the calibrator and wait approximately 30 seconds before starting
the system check measurement.
5. Start the calibration measurement by pressing the
<Start/Stop>
push-button.
The measurement starts after 5 second delay. The system check measurement
time is also predefined to 5 seconds. During the calibration period 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
.
If system check measurement shows bigger difference than 2 dB the user should
manually stop the measurement with the
<Start/Stop>
push-button.
4.3.2. Calibration by Sensitivity in case of Acoustic signal
Calibration by using the microphone’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.
<ENT>
