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IM DL850E-01EN
About Shunt Calibration (Only on the 701271(STRAIN_DSUB))
The 701271 (STRAIN_DSUB) strain module supports shunt calibration.
Shunt calibration is a type of scaling in which the strain measurement gain is adjusted through the connection
in parallel of a known resistance (the resistance for shunt calibration, hereinafter referred to as the shunt
resistance) to the strain gauge. The strain module (701271 (STRAIN_DSUB)) supports shunt calibration with a
built-in shunt-calibration relay circuit.
To perform shunt calibration, you need a bridgehead that supports shunt calibration (the 701957 or 701958).
Bridge
voltage
Bridge–
In–
Shunt resistor
(connected to the bridgehead)
120 Ω
In+
120 Ω
120 Ω
When correcting the gain on the negative side (normal)
Bridge–
In+
In–
Shunt resistor, when
correcting the positive side
Bridge
voltage
120 Ω
120 Ω
120 Ω
When correcting the gain on the positive side
Shunt calibration relay circuit
(Built into the strain module.
Turns on and off automatically
when shunt calibration is
executed.)
Shunt calibration relay circuit
(Built into the strain module.
Turns on and off automatically
when shunt calibration is
executed.)
On the DL850E/DL850EV, in addition to performing normal shunt calibration (when the shunt-calibration relay
circuit is on), you can also set the zero-point value when the relay circuit is off. The zero-point value is valid when
the strain value after balancing is performed is not 0.
Linear Scaling Modes (Scaling Mode)
• Shunt
Select this mode to perform shunt calibration.
The other linear scaling modes are the same as those listed for voltage measurement.
2 Vertical Axis