Unipulse F331, Operation Manual

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14
4 HOW TO CALIBRATION
14
HOW TO CALIBRATION
Chapter
4
"Calibration" refers to an operation whereby matching between the F331 and a strain gauge sensor
is obtained. The F331 uses the calibration methods as described below.
◇
Zero calibration
Register the initial zero point.
Check around the strain gauge sensor for unwanted loads such as foreign object is placed or there is
contact with peripheral equipment.
◇ Equivalent input calibration
This approach uses no actual loads but setting of the rated output value of the strain gauge sensor
(mV/V) and the rating value (value to be displayed).
This method is simple and employed when actual loads cannot be applied.
For example
Gain will be automatically decided by registering the values indicated as follows:
For load: 2.001mV/V - 100.0kgf
For pressure: 2.002mV/V - 10.00kgf/cm2, and
For torque: 2.502mV/V - 15.00kgf.m.
◇ Actual load calibration
This approach provides calibration by applying an actual load to the strain gauge sensor and setting
the actual load value. This calibration is without little errors and more correct.
4
HOW TO CALIBRATION
A data sheet will be attached to a strain gauge sensor you buy.
On the data seat, the following values are listed.
Capacity .................... Load (unit: kg, t, etc.)
Rated Output............. Voltage (unit: mV/V)
Non-Linearity, Hysterisis, Input Resistance, Output Resistance,
Zero Balance, etc.
The Capacity and the Rated Output are necessary values for the equivalent input
calibration. Input these two values to F331.
Point