134
3) You will hear an acoustic beep for a few seconds until the nominal acceleration value
is reached (a=10m/s
2
Æ
L
a
=140 dB at w=1000 rad/s
Æ
f=159.15 Hz). When this
value is reached the level check led flashes green and the beep stops.
4) Next, press
to access to the SC310 menu.
5)
Select the option SETTINGS
Î
SENSITIVITY ADJUSTMENTS
Î
ACCELEROMETER
Î
ADJUSTS from the SC310 menu
6) The acceleration level measured by the SC310 will appear on the screen, this
acceleration level is measured without frequency weighting:
7) Verify that the reading value is 140 dB (corresponding to the nominal acceleration
value). The calibrator’s tolerance is 3%; this means that the correct verification
interval value is from 139.7 dB to 140.3 dB.
If the value reading differs from the specified interval then follow the next steps
8) Use the keys
and
to adjust the measured value to the one generated
by the calibrator.
9) Validate with
or press
to go back to the SC310 menu without give
effect to the sensitivity.
If you are using a different accelerometer to a
accelerometer, you do not have
an acceleration calibration and your accelerometer has a sensitivity of 100 mV/g, 500 mV/g
or 1000 mV/g. Select the option SETTINGS
Î
SENSITIVITY ADJUSTMENTS
Î
ACCELEROMETER
Î
AC001 for accelerometers with sensitivity 100 mV/g or SETTINGS
Î
SENSITIVITY ADJUSTMENTS
Î
ACCELEROMETER
Î
AC005 for accelerometers with
sensitivity 500 mV/g or SETTINGS
Î
SENSITIVITY ADJUSTMENTS
Î
ACCELEROMETER
Î
AC006 for accelerometers with sensitivity 1000 mV/g.
10.6.2 Prior adjustments: Evaluation time
Before beginning a measurement, the following parameters should be set:
•
Evaluation time (T) used in the measurement of spectral and overall levels. This evaluation
is carried out in consecutive intervals of T time.
To set this parameter, select the SETTINGS
Î
MEASURING
Î
SPECTRUM ANALYSER
option from the SC310 menu.
