8
Understand Back-to-Back Calibration limitations. Do not
expect the uncertainty of calibration to be any better than
±
2%. (In fact, the uncertainty may be as high as
±
3% or
±
4% for frequencies <10 Hz or >2 kHz.) Since large
sensors may affect high-frequency accuracy, verify that
the test sensor does not mass load the reference standard.
Validate
your
calibration
system
with
another
accelerometer prior to each calibration session. Check
with the manufacturer for exact system specifications.
8.5 CONCLUSIONS
Without an adequate understanding of dynamics,
determining what, when, and how to test a sensor is a
difficult task. Therefore, each user must weigh the cost,
time, and risk associated with self-calibration versus
utilizing the services of an accredited laboratory.
9.0 SERVICE
See the supplement sheet, contained in this manual, for
information on our warranty, service, repair, and return
policies and instructions.
When unexpected measurement problems arise, call our
24-hour SensorLine
SM
to discuss your immediate dynamic
instrumentation needs with a factory representative.
Dial 716-684-0001.
3425 Walden Avenue, Depew, NY 14043-2495 USA Vibration Division toll-free 888-684-0013
24-hour SensorLine
SM
716-684-0001 FAX 716-685-3886 E-mail [email protected] Website www.pcb.com
A PCB GROUP COMPANY ISO 9001 CERTIFIED A2LA ACCREDITED to ISO 17025
© 2002 PCB Group, Inc. In the interest of constant product improvement, specifications are subject to change without notice.
PCB and ICP are registered trademarks of PCB Group, Inc. SensorLine is a service mark of PCB Group, Inc.
All other trademarks are properties of their respective owners.
Manual Number: 32258
VIB-High Sensitivity DC MANUAL-
ECN Number: 36609
Printed in U.S.A
Manual Revision: A
