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IM 701240-01E
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App
Index
Horizontal and Vertical Axes
Executing Shunt Calibration (only on the 701271 (STRAIN_DSUB))
To execute shunt calibration, the strain corresponding to the shunt resistor to be used
must be calculated in advance. For the calculation procedure, see appendices 9 and 10.
Be sure to execute balancing before executing shunt calibration.
13. Press the Next 1/2 soft key.
14. Press the Linear Scale soft key. A Linear Scale setup dialog box appears.
15. Use jog shuttle+SELECT to set the Mode to Shunt.
Reading the Connected Shunt Resistance and Calibrating
16. Use jog shuttle+SELECT to set a strain corresponding to the calculated shunt
resistance in P2:Y.
17. Use jog shuttle+SELECT to select Shunt Cal. Then, press Exec to read the
current input value into P2:X.
18. Enter the Unit as necessary.
For the procedure to set the character string of the unit, see section 4.2.
19. If the Display Type is set to Floating, set the Decimal Number and SubUnit
values.
Note
• In a normal shunt calibration, set only P2:Y (P1:Y is 0).
• Scale the strain value using a shunt resistor. P1:X is the input value when a shunt resistor is
not connected. P1:Y is the strain value corresponding to P1:X. P2:X is the input value when a
shunt resistor is connected. P2:Y is the strain value corresponding to the shunt resistance.
The line connecting points P1 and P2 is used to perform scaling.
• When Shunt Cal Exec is executed, the relay circuit for shunt calibration built into the strain
module is turned ON/OFF to automatically set P1:X and P2:X to the input value when the
shunt resistor is connected and the input value when the shunt resistor is not connected,
respectively.
• If you change P1:X, P1:Y, P2:X, or P2:Y, the linear scaling setting is also changed.
• Executing Shunt Cal changes P1:X and P2:X to the current input values.
Inverting the Waveforms
For details on the inverted display, see section 5.12.
5.15 Setting the Strain Measurement
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