Calibration For Vibration Measurements - BRUEL & KJAER 2010 Instructions And Applications

5. Select push-buttons:
FREQUENCY RESPONSE
INPUT
REF.
50
mV
"Linear"
As appropriate
6. From the calibration chart of the microphone in use determine its
Open Circuit Sensitivity in mV per N/m2. This must be corrected for
the attenuation and capacitive loading of the preamplifier. (Refer to
the microphone and preamplifier instruction manuals).
7. Adjust the appropriate input SENS. potentiometer until the required
sensitivity is indicated on the lower meter scale marked Open Circuit
Sensitivity.
3.2.3.
Calibration for Vibration Measurements
Using an Accelerometer Calibrator
Calibration may be carried out using the Accelerometer Calibrator
Type
4291
or the Accelerometer Calibrator and Preamplifier Type
4292.
Both calibrators can provide a sinusoidal acceleration of 1 g peak at
79.6
Hz
(w
=
500).
1. Carry out the preliminary adjustments if necessary.
Accelerometer B&K Scale No.
Sensitivity mV/g Accelerometer Type
1.7- 6 4344 8303 4345
SA
0142
4339 4343 8301 8302
6 - 17
SA
0058
4333 4335 4340
17 - 60
l
4332 4334
SA
0143
60 -170
J
4338
SA
0144
Table 3.2. Accelerometer scales for use with the 2010
25