MTS Series 793 - Manual (Page 168)

MTS Series 793 Tuning and Calibration
Force Sensor Calibration
Calibration Procedures 168
4. Repeat steps 2 and 3 for all ranges.
Example: Suppose you have an actuator with a full-scale capacity of ±10 kN
and ranges of ±10 kN, ±5 kN, ±2 kN, and ±1 kN. In this case you would
repeat this process and calibrate compression at 80% of each range (8 kN, 4
kN, 1.6 kN, and 0.8 kN).
Note Some systems do not provide or require multiple ranges, such as those
using full-range conditioners (e.g., Model 493.25 DUC module). In this
case, only one range is used (typically 100%).
Record data points
The accuracy tolerance of your data depends on the manufacturer of your sensor.
Your sensor should include a calibration data sheet that shows the data point
tolerance. Sensors from MTS include a sensor calibration data sheet that shows
the data points as it was calibrated.
1. Record the data points for compression.
Standalone FlexTest SE Controllers:
A. Adjust the Setpoint to achieve a load standard readout of zero.
B. Adjust the Setpoint between zero and full compression three times.
This exercises the force sensor to remove hysteresis.
C. Establish the zero reference.
Using a load standard
• Adjust Setpoint for 0 kN. Then zero the load standard readout.
Using dead weights
• Remove all dead weights.
• Adjust the Manual Offset for a signal value of 0 kN on the DVM or
other monitoring device.
Select Setup > Force > Offset/Zero > Manual Offset
D. Adjust the Setpoint to achieve a load standard reading of 20%
compression and record the meter reading. Repeat this step for 40%,
60%, 80%, and 100% compression.
Automated Controllers:
A. Adjust the Manual Cmd slider on the Manual Command window to
achieve a load standard readout of zero.
B. Adjust the Manual Cmd slider between zero and full compression
three times. This exercises the force sensor to remove hysteresis.
C. Establish the zero reference.