Chapter 3; Measuring Vibration; Single Axis Transducer Mounting - Castle group Excieo GA2005H Operating Manual

Chapter 3

Measuring Vibration

It is advisable to validate your instrument prior to, and after taking
measurements using a known vibration source such as the Castle GA606
Vibration Calibrator.
To ensure measurements are as accurate and as repeatable as possible always
ensure that your cable is tightened securely to your accelerometer and that the
accelerometer is mounted as securely and as flush as possible to the vibration
source. The trailing cable of the accelerometer should also be attached to the
vibration source without creating a potential hazard for the operator or other
people. Where practicable it may be beneficial to permanently attach the
accelerometer cable.
Where possible always mount the accelerometer as near to the centre of
where the operator holds and grips the vibration source. In reality this is not
always possible and the best compromise must be achieved.
Measurement durations are not governed but as a rule of thumb use an
absolute minimum time period of 5 minutes for Whole Body and 30 seconds for
Hand Arm Vibration.
It is recommended depending on the process that a minimum period of 15
minutes is used for Whole Body and between 3 to 15 minutes for Hand Arm
vibration. These increased durations will undoubtedly increase the accuracy and
repeatability of your measured results.

Single Axis Transducer Mounting

If your Excieo meter was purchased with a Single Axis Accelerometer then you
will have been supplied with a large spike probe that can be used for the
interface of the transducer to the vibration source.
Mounting of the single axis accelerometer to the vibration source can also be
achieved by tapping a stud into the vibration source and attaching the
accelerometer to the stud. Alternatively the stud may be adhered to the device
with an adhesive that dries rigid. Castle Group Ltd can supply a glue and stud
pack if required, (order code KD1215).
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