![YOKOGAWA ScopeCorder DL750 User Manual Download Page 388](http://html.mh-extra.com/html/yokogawa/scopecorder-dl750/scopecorder-dl750_user-manual_911347388.webp)
App-56
IM 701210-06E
Shunt Calibration Procedure
1. Calculate the strain value (
µ
STR) corresponding to the shunt resistor to be used. For
the calculation procedure, see “Calculating the Shunt Resistance” in the next section.
2. Execute balancing without applying a load to the strain gauge and correct the zero point.
3. Execute shunt calibration and correct the gain.
Shunt calibration is executed using DL750/DL750P channel menu > Linear Scale >
Mode. Usually, the negative gain is corrected. However, if you are correcting the
positive gain, change the position of the shunt resistor as shown in the upper right
figure.
Strain input
Strain
The zero point is
corrected when
balancing is executed.
Strain
P2:Y
P2:X
Strain input
• Balance
• Shunt calibration
The strain value corresponding to the
shunt resistor is set to P2:Y of the setup menu.
Current measured
value
Before
execution
After
execution
Before execution
After execution
Gain is corrected.
1. Automatically obtained when shunt calibration is executed.
1
Execution Menu of Shunt Calibration
The execution menu of shunt calibration is set using channel menu > Linear Scale >
Mode. In normal shunt calibration, only P2:Y is set. In addition to the normal shunt
calibration (when the shunt calibration relay circuit is ON), the DL750/DL750P allows the
setting of a zero point when the relay circuit is OFF. This function is useful when the
strain value is not 0 after the execution of balancing.
Items in the Execution Menu
(1)P1:X:
If (Shunt Cal) Exec is executed, the input value when the relay circuit is OFF
is applied.
(2)P1:Y:
Sets the value (usually 0) when the relay circuit is OFF.
(3)P2:X:
If (Shunt Cal) Exec is executed when the relay circuit is ON, the input value
when the relay circuit is ON is applied.
(4)P2:Y:
Set the strain value corresponding to the shunt resistance when the relay
circuit is ON.
(1)
(2)
(3)
(4)
Appendix 11 Shunt Calibration of the Strain Module