18
7-7. Calculating coefficient
From the calibration data input from the optical measurement described in the section 7-6, calculate the
regression of coefficient.
Step
Display
Operation
①
3 .
0 1
F L O U R
∨
▶
0 2
×
●
Select the channel number and calculate the regression.
Perform (1) to (2) described in P.16.
Using [
扌
]/[
➡
] key, move the cursor to the channel number
to which the calibration curve is to be registered.
Make sure that the check mark icon
is displayed, and
press the [CALC.] key.
②
3 . 0 1
r :
0 . 9 9 9 5 5
S e :
0 . 0 3 3 2
0
●
Check the result of regression calculation.
The calculation is internally executed. When the result is
displayed, scroll with [
扌
]/[
➡
] key and check the result.
• Regression correlation coefficient → r
• Standard error of regression → Se
• Coefficient → a0, a1, a2
③
3 . 0 1
S A V E
▶
N 0 5
C A N C E L
●
Register the coefficient.
Move the cursor to [SAVE] with [
扌
]/[
➡
] key, and press the
[ENTER] key. The coefficient will be registered.
* The coefficient will not be saved, if the [ENTER] key is
pressed with [CANCEL] selected with
[
扌
]/[
➡
]
key.
④
3 .
0 1
F L O U R
▶
0 2
×
●
Complete registration of coefficient.
When the coefficient is registered, the icon turns off and
the measurement will be ready.
* When the [CALC.] key is pressed while selecting the channel
number with no icon, the calculation result can be displayed
and checked.
[Channel status icon]
When changing the measurement channel, or during setup, the following icon will be displayed in the channel selection screen.
Icon
Measurement Calculating coefficient
Status
×
×
Calibration data is not input, or data is insufficient.
(For making calibration curve, at least three or more calibration data is
required.)
×
○
Effective coefficient is not set.
(The main unit updated the calibration data, but the calculation is not
done.)
(No icon)
○
×
Effective coefficient is set.
* If the effective coefficient is set in any of the following method, the measurement is ready (no icon is displayed).
• Setting the effective coefficient using PC software
• Setting the effective coefficient referring to "Setting the channel parameter" (P.22)
• Making the effective coefficient referring to "7-7 Calculating coefficient" (P.22)
* When changing the measurement channel, the channel with the icon
or
cannot be selected.
* Making calibration curve is available with any icon status (channel can be selected while making a calibration curve). How-
ever, the calibration data or coefficient may have been input even when the channel name is blank. Use caution in selecting
a channel when making a calibration curve.
7-8. Calibration curve calculation
Setting offset value and slope correction value will enable correction of measurement value.
Moisture value (displayed moisture) after correction =
Moisture value before correction x Slope correction value + Offset value
* For how to set the offset value and slope correction value, refer to the items described in "Setting the channel
parameter" (P.23).
