Hioki MR8827, Instruction Manual

Page: 161 / 436

156
Convert Input Values (Scaling Function)
When the strain gauge transducer’s inspection record provides the calibration
factor
Set
[Method]
on the
[Scaling]
sheet to
[Ratio].
Example 3
To display the data measured with the strain gauge transducer with a calibration
factor of 0.001442 G / 1 10
­
6 strain* in terms of gees (G).
The value of the calibration factor (0.001442 [G]) is set as the conversion ratio.
(* 10
−6
strain =
με
)
Move the cursor to the appropriate channel, and set as follows.
Setting Selection
Se NUM
Unit G
Ratio
(Conversion
ratio)
0.001442 [G]
(Displays as 1.4420m)
Using a Strain Gauge With a Gauge Rate Other Than 2.0
The Model 8969 or U8969 Strain Unit measures the gauge rate as 2.0.
When using other strain gauges, the gauge rate needs to be set as the
conversion ratio.
For example, if the gauge rate is 2.1, the conversion ratio is 0.952 (≈2/2.1).
Example 4
Measure using a strain gauge (gauge rate: 2.1), and display the measured data in units of G.
The scaling (conversion ratio) needs to be calculated to include both gauge rate and physical
value conversions. In this case, the conversion ratio setting is the product of the conversion ratios
of the gauge rate and measurement unit scaling.
The gauge rate component of the conversion ratio is 0.952, and the physical value component is
0.001442*
Conversion Ratio = 0.952 × 0.001442 = 0.0013728
As in Example 3, enter [0.0013728] as the conversion ratio.
To convert measurement values to physical values when using a strain gauge, calculate using
the Young's modulus or Poisson's ratio of the measurement object. The conversion method
depends on the conditions in which the strain gauge is used.
Refer to “Appendix 2.5 Scaling Method for Strain Gauges” (p. A8).
This value cannot be changed.