YOKOGAWA DL750 User Manual

5-36
IM 701210-05E
Shunt Calibration (Only on the 701271(STRAIN_DSUB))
The 701271 Strain Module (STRAIN_DSUB) supports shunt calibration.
Shunt calibration is used to correct the gain of strain measurements by inserting a known
resistance (shunt calibration resistance (shunt resistance)) in parallel with the strain
gauge. It is a type of scaling. The Strain Module (701271(STRAIN_DSUB) supports
shunt calibration and contains a built-in relay circuit for shunt calibration.
To execute shunt calibration, a bridge head that supports shunt calibration (701957/
701958) is needed.
Bridge
voltage
Bridge+
Bridge-
In+
In-
Shunt resistor (Applied to the bridge head)
Shunt calibration relay circuit (Built into the strain
module. Turns ON/OFF automatically when shunt
calibration is executed.)
Bridge+
Bridge-
In+
In-
Shunt resistor, when correcting the positive side
120 Ω
120 Ω
120 Ω
• When correcting the gain on the negative side (normal)
Shunt calibration relay circuit (Built into the strain
module. Turns ON/OFF automatically when shunt
calibration is executed.)
Bridge
voltage
120 Ω
120 Ω
120 Ω
• When correcting the gain on the positive side
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.
P1:X: If (Shunt Cal) Exec is executed, the input value when the relay circuit is OFF is
applied.
P1:Y: Set the value (usually 0) when the relay circuit is OFF.
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.
P2:Y: Set the strain value corresponding to the shunt resistance when the relay circuit is
ON.
Strain
P2:Y
P2:X
Strain input
• 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
Gain is corrected.
1. Automatically obtained when shunt calibration is executed.
1
5.17 Setting the Strain Measurement

YOKOGAWA DL750 Specifications

General

Brand	YOKOGAWA
Model	DL750
Category	Measuring Instruments
Language	English