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5-33
IM 701210-05E
Horizontal and Vertical Axes
5
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 10 and
11.
Be sure to execute balancing before executing shunt calibration.
12.
Press the
Next 1/2
soft key.
13.
Press the
Linear Scale
soft key. A Linear Scale setup dialog box appears.
14.
Use
SELECT
,
jog shuttle
, and
SELECT
to set Mode to Shunt.
• Reading the Connected Shunt Resistance and Calibrating
15.
Use
SELECT
and the
jog shuttle
to set a strain corresponding to the calculated
shunt resistance in P2:Y.
16.
As necessary, enter the Unit according to the procedures given in section 4.2.
17.
Use the
jog shuttle
and
SELECT
to select Exec. The current input value is
reflected in P2:X.
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 Exec changes P1:X and P2:X to the current input values.
Inverting the Waveforms
For details on the inverted display, see section 5.12.
5.17 Setting the Strain Measurement