YOKOGAWA 701957, Руководство пользователя

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7
IM 701957-01E
2 Shunt Calibration
This instrument supports shunt calibration. When executing shunt calibration, perform
balancing without applying a load to the strain gauge, then turn on shunt resistance. The
values from the shunt resistance are stored on the measuring instrument.
P2:X
P2:Y
Balance
Shunt calibration
Strain Strain
Before execution
Before execution
After execution
After execution
Strain input Strain input
The zero point is corrected
when balancing is executed.
Current measured
value*
Gain is corrected.
The strain value corresponding to
the shunt resistor is set to P2:Y of
the setup menu.
* Automatically obtained when shunt calibration is executed.
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. With this instrument, the gain can be corrected on both the positive and negative
sides. Make sure to notice whether the corresponding strain values are positive or
negative.
When correcting the gain on the negative side (normal)
Shunt resistor insertion terminal: between 8 to 9
Set negative to the corresponding strain value.
7 8 9
Bridge-
In+
120
Ω
120
Ω
120
Ω
In-
Shunt calibration relay
circuit (Built into the
strain module. Turns
ON/OFF automatically
when shunt calibration
is executed.)
Shunt resistor
(Applied to the bridge head)
Bridge
voltage
Shunt resistor
Strain
gauge
Shunt resistant
connection terminal
When correcting the gain on the positive side
Shunt resistor insertion terminal: between 7 to 8
Set positive to the corresponding strain value.
Bridge-
In+
In-
7 8 9
120
Ω
120
Ω
120
Ω
Shunt calibration relay
circuit (Built into the
strain module. Turns
ON/OFF automatically
when shunt calibration
is executed.)
Shunt resistor
(Applied to the bridge head)
Bridge
voltage
Shunt resistor
Strain
gauge
Shunt resistant
connection terminal
For specific instructions on performing shunt calibration, refer to your measuring
instrument’s user’s manual. For information on shunt resistance and the corresponding
strain values, see page 13 in “Calculation of the Shunt Resistance.”