MTS Clip-On Gages - Manual (Page 21)

Calibration 21
Calibration
This section describes how to calibrate a Product Name with a
controller. Calibration ensures the output from the clip-on gage
accurately represents the displacement measured by the clip-on gage.
Two adjustment methods are described.
Calibration Overview
The calibration process coordinates the interaction between the
transducer, a DC conditioning circuit, and a cable. Calibration of a
transducer is a two step process:
• First, a specific output of the conditioner is adjusted to a
specific displacement of the transducer. This is performed by
adjusting the excitation voltage and amplification (gain) of the
conditioner.
• The second step verifies of the output the transducer/
conditioner versus a known standard displacement over the
entire range of measurement.
Certified Calibration
MTS Systems Corporation offers a transducer calibration service. The
service offers full calibration (including verification) of your transducer
to ASTM E83. Further information on the verification procedure can be
found in the two predominant standards for transducers, ASTM E83 and
ISO 9513.
Gain
The conditioner is designed to have an output of approximately ±10 V at
the full-scale displacement of the desired range. Most transducers may
be used with this conditioner to obtain full-scale ranges down to 10% of
the full travel range of the transducer. (Full-scale ranges of 5% may be
possible, but some increase in drift and noise will result.)
In most transducers, the best linearity is obtained by setting the gain
between 70% and 90% of the desired travel range instead of 100%. The