MTS Axial Extensometers - Manual (Page 41)

Calibration 41
Calibration
This section describes how to calibrate an axial extensometer with a
controller. Calibration ensures that the output from the extensometer
accurately represents the displacement measured by the extensometer.
Three adjustment methods are described.
Contents
How to Use a Vernier Caliper 43
How to Use a Calibration Block 46
How to Use a Calibration Stand 47
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 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