Use As A Vibration Meter - BRUEL & KJAER 1053 Instruction Manual

ing the 1053 in open-loop operation, the output level increases, at a rate equal to 35 dB
per frequency period, to the programmed generator level when "Operate" is pressed.
Therefore it is important to set the programmed generator level to a low value and then
increase the actual output level slowly by using the thumbwheel, in order to protect the
vibration exciter and test specimen.
3.3.2. Use as a vibration meter
24
The 1053 can be used to measure vibration, in open-loop operation without the com-
pressor or as a stand-alone vibration meter as shown in Fig. 3.2. This shows a uni-gain
accelerometer measuring the vibration from an electric motor. To use the 1053 as a
vibration meter, proceed as follows:
Uni-Gain
Accelerometer
eg . Type
4282
~~~~
Electric Motor
AO 0231
Vibration Exciter
Control
1 053
870426
Fig. 3.2. Using the Vibration Exciter Control Type 1053 for vibration
measurement
1. Connect the mains supply to the 1053, following the safety precautions described in
3.1.3 and select Power "On". The front-panel displays will light and the instrument
will perform a memory check. If Error 100 is displayed, refer to section 7.1.
2. Connect the measurement accelerometer to the Charge Input of the 1053, using the
10-32 UNF to TNC cable AO 0231.
3. Set the accelerometer innut sensitivity, using the Input Sensitivity selector on the
rear panel.
4. Press "Input Sens." to display the transducer input sensitivity. Adjust the charge
sensitivity (if necessary) by between
+
5 and -8%, according to the calibration chart
for the transducer.
5. Press "Measured Level". If the measurement parameter units need to be changed
(from Sl to imperial, or vice versa) include step 6.
6. Select special parameter 01 (refer to section 7.2) and use the thumbwheel to change
the units.
7. Select the required vibration-function for measurement, using the "Function" key.
8. Set the 1053 Generator "Frequency" to the lowest frequency to be measured. This
selects the position of the built-in high pass filter in the vibration meter.
9. Select special parameter 02 (refer to section 7.2) and set the vibration-meter time
constant, in accordance with the vibration characteristics.