MTS Systems FlexTest SE Service Information

Model 493.02 Controller Service
Calibrating an Extensometer
Calibration
178
Task 4 Gain/Delta K Calibration
If you are using Gain/Delta K for your calibration type, complete the
following procedure. If not, complete Task 5 Gain/Linearization
Calibration on page 180.
Calibrate the negative
output (tension)
This task calibrates the extensometer negative output using the
calibration Gain controls. Since the Gain setting will affect your Delta
K setting, you should always calibrate the negative side first.
To calibrate the negative extensometer output:
1. Use the Setpoint (Stand-Alone) or Manual Cmd slider
(Automated) to adjust the calibrator between zero and 100% of the
extensometer’s full-scale range three times. This exercises the
extensometer to remove any hysteresis
2. Apply a negative command equal to 80% of the negative full scale
value (-8 V DC, or in this example, a calculated output of –8 cm/
cm).
3. Note the strain signal value on your meter.
4. If the signal value is does not match the commanded level,
increase Post-Amp Gain on the Calibration submenu or tab to
achieve an 80% value (–8 cm/cm). Record your final strain signal
value from the meter for the 80% output.
mechanical input
Indicated output
∆K > 1
∆K = 1
∆K <
1
Gain

MTS Systems FlexTest SE Specifications

General

Brand	MTS Systems
Model	FlexTest SE
Category	Controller
Language	English