KEYENCE LT-9001 Series - Manual (Page 102)

Common
Operations
and
F
unction
Settings
5
Chapter
E LT-9001-IM
5-16
OUTPUT Settings
An error may occur in the measured value due to
the surface conditions or slanting of the
measurement target. Errors occur in the thickness
measurement of a transparent object depending
on the refractive index. These errors can be
corrected by using the calibration function.
Prepare one or two types of known measurement
targets (masters) and perform calibration based on
the respective measured value that have not been
calibrated.
Performing calibration determines the span value
(amount of slanting) and the shift value that are to be
used to convert the pre-calibrated measured value to
the calibrated one.
The calibration function of the LT-9001 Series
changes the "a" (amount of slanting) and "b" (shift
value) in the formula "Y = aX + b".
Reference
CALIB (Calibration)
The calibration procedure is explained as follows.
1 Select [CALIB] from the [OUT1] or [OUT2]
screen.
The calibration setting screen appears.
2 Select [RAW DATA] of the [1ST POINT] using
the [ENTER] button.
3 Select the value by using the [ENTER] button
and specify the value by using the [t], [s],
[
▲], and [▼] buttons.
4
Press the [ENTER] button.
The measured value of the first point is fixed.
5
Select [CAL DATA] of the [1ST POINT] by
using the [ ▼] and [▲] buttons.
6 Select the value by using the [ENTER] button
and specify the value by using the [t], [s],
[ ▲], and [▼] buttons.
7
Press the [ENTER] button.
The calibrated value of the first point is fixed.
8 Select [RAW DATA] of the [2ND POINT] by
using the [ ▲] and [▼] buttons.
Set the measured value and the calibrated value
for the second point in the same manner.
9 Select [EXEC.] by using the [ ▲] and [▼]
buttons.
10 Press the [ENTER] button.
The calibration values are fixed.