Efficient Plant April 2022 - 15

feature | data acquisition
Follow these tips
to obtain accurate
data and minimize
maintenance costs.
Can You Trust
IN THE PAST decade, trending vibration
parameters has become the most widely
used technique for monitoring machinery
health, and industrial accelerometers
have become the workhorse in the predictive-maintenance
market. While systems
continue to evolve to accommodate modern
manufacturing practices and streamline
recordkeeping, sensor accuracy remains a
critical factor when it comes to protecting
valuable assets.
Despite the risks associated with inaccurate
output, the performance specifi cations
of sensors used for machine-health
monitoring are oſt en taken at face value.
Reduce the likelihood that bad data leads to
equipment damage and other costly errors
APRIL 2022
with these tips for careful sensor selection
and consistent performance monitoring.
CHECK THE SPEC (AND READ
BETWEEN THE LINES!)
When you're new in the market for an
accelerometer, it pays to compare the quality
standards of various sensor manufacturers.
Aſt er all, an advertised specifi cation is
only as good as its method of verifi cation.
Several national accrediting bodies can help
eliminate the guesswork. Th ey include:
NIST: National Institute of Standards and
Technology (nist.gov)
NVLAP: National Voluntary Lab Accreditation
Program (nist.gov)
A2LA: American Association for Lab
Victor Viola
IMI Sensors, Industrial Division
Your Sensor Output?
Accreditation (a2la.org).
In the U.S., NIST is the authority on
calibration equipment standards, while
NVLAP and A2LA are two of the most
popular accreditation bodies when it comes
to calibration processes. A lab that uses
NIST traceable calibration equipment is not
necessarily accredited to ISO standards for
calibration practices. However, an accreditation
by NVLAP or A2LA (or another
certifying body) guarantees NIST traceability
of equipment and lab accreditation to
ISO standards.
Note that these are not the only valid
accreditation bodies to ISO practices. Th ey,
and others, serve as shorthand for a thorough
background check of your manufacEFFICIENTPLANTMAG.COM
| 15
http://www.a2la.org http://www.nist.gov http://www.nist.gov http://www.EFFICIENTPLANTMAG.COM

Efficient Plant April 2022

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