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The Vibration Sensors
Business Group in California and its two manufacturing
facilities in China and France now offer factory calibration and
test services for Piezoresistive, Piezoelectric and Integrated
Electronics Piezoelectric (IEPE, ISOTRON, ICP, etc.)
accelerometers.
We offer NIST (US), DKD
(Germany), COFRAC (France) traceable calibration services on
sensitivity at 100 Hz (102 or 120 Hz in Europe). Sensitivity
reference frequencies other than 100/102/120 Hz are available
upon request. Users of Measurement Specialties accelerometers
can expect 1 week turnaround for full frequency response tests
from 10 Hz through resonance and for transverse cross-axis
sensitivity testing.
Calibration of
accelerometers not manufactured by Measurement Specialties may
take longer depending on availability of test fixtures and the
manufacturer’s specifications. Environmental testing over
temperature, centrifuge testing and shock calibration are also
offered on a case-by-case basis.
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Pricing for these
services is as follows:
| Sensitivity Calibration at
100/102/120Hz (please specify) |
$75.00 (75 Euro) Per Axis |
CS-SENS-0100, -0102, -0120 |
| Sensitivity & Frequency Response Calibration |
$150.00 (150 Euro) Per Axis |
CS-FREQ-0100, -0102, -0120 |
| Transverse Sensitivity Calibration |
$75.00 (75 Euro) Per Axis |
CS-TRANS |
| Shock Linearity Calibration |
Consult Factory |
CS-TRANS |
| Environmental Testing |
Consult Factory |
CS-SKLIN |
A calibration
certificate is issued for each accelerometer axis.
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If a unit is found to be
out of specification or not functioning properly, the
customer will be notified and a testing fee of $40.00 (40
Euro) per axis will be charged only if the customer decide
not to have the unit calibrated. This fee will be deducted
from the list price of any replacement unit purchased.
Test professionals can
access these calibration services by issuing a PO to your
local Measurement Specialties Customer Service
representative. Once the PO is obtained, an RMA will be
issued. The RMA will identify where the units are to be sent
for calibration. Customers in Asia will be directed to send
their units to Shenzhen, China, U.S. customers to Aliso,
Viejo, California, and European customers to Les Clayes Sous
Bois, France.
Important Note: If the
units to be calibrated have connectors attached, customers
will be requested to send the appropriate mating connector.
Customers will also be requested to advise our staff if the
units have been exposed to any toxic substances or installed
near any radiation source.
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Transverse Sensitivity
is defined as the sensitivity of the accelerometer to
acceleration transverse (orthogonal) to its sensitive
direction. Transverse Sensitivity is expressed as a
percent to its primary sensitivity. Most of MEAS
accelerometers are specified as having <3% transverse
sensitivity with <1% optionally available upon request.
Our transverse
sensitivity tester vibrates the unit under test at a
constant acceleration level while the turret rotates around to register the highest Transverse
Sensitivity reading.
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Calibration Glossary
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Acceleration: |
The time rate of change of velocity. Measurement units are
typically expressed as ft/s2,
meters/s2,
and G's. (1G = 32.17 ft/s2
= 9.81 m/s2). |
| Accelerometer: |
Transducer with
output proportional to acceleration. |
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COFRAC: |
Comite Francais d'Accreditation |
| Compensated
Temperature Range: |
The temperature
range in which the accelerometer will meet the
specifications for Thermal Zero Shift and Thermal
sensitivity Shift. |
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DKD: |
Deutscher Kalibrierdienst (Germany Accreditation) |
| Excitation: |
The recommended
voltage with which an accelerometer should be powered. |
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Frequency Bandwidth: |
The range of frequencies over which the accelerometer is
intended to be used. |
| Frequency
Response: |
That portion of
the frequency spectrum over which an accelerometer will
perform within specified limits. |
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Full Scale Output (FSO): |
The electrical output change produced by the accelerometer
when it is powered by the recommended excitation voltage and
the Range or Full Scale (FS) acceleration is applied. |
| IEPE: |
Integrated
Electronics Piezoelectric |
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Natural or Resonance Frequency: |
The frequency at which the accelerometer’s active sensing
element will go into resonance and respond with the maximum
movement for a specific applied acceleration. |
| NIST: |
National
Institute of Standards and Technology |
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Non-Linearity: |
The deviation of the accelerometer output signal from a
theoretical straight line which has been fitted to the data
points of an actual calibration. |
| Operating
Temperature Range: |
The temperature
range in which the accelerometer will function without
damage from thermal effects. |
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PE: |
Piezoelectric |
| PO: |
Purchase Order |
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PR: |
Piezoresistive |
| RMA: |
Return Material
Authorization |
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Sensitivity: |
Expressed as a per unit of acceleration (G), it is
calculated by dividing the Full Scale Output by the Full
Scale acceleration. |
| Thermal
Sensitivity Shift (TSS): |
The expected
change in sensitivity of the accelerometer as a function of
temperature. |
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Thermal Zero Shift (TZS): |
The change in the Zero Offset as a function of temperature. |
| Zero Offset or
Zero Measurand Output (ZMO): |
The electrical
(DC) output of the accelerometer when there is no applied
acceleration. |
Contact Us for Factory
Calibrations
North and South America
Vibration & Shock Sensors Design Center
Measurement Specialties Inc.
33 Journey, Suite 200
Aliso Viejo, CA 92656, USA
email: accel-cal@meas-spec.com
Europe
Measurement Specialties, Inc.
26 rue des Dames
F78340 Les Clayes-sous-Bois, France
email: accel-cal@meas-spec.com
Asia
Measurement Specialties (China), Ltd.
F1.6-4D, Tian An Development Compound
ShenZhen, China 518048
email: accel-cal@meas-spec.com
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