Chino KP 2000 Series, Instructions Manual

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10-14. Customer scale correction
In this controller a function for correcting the customer scale is provided in mode 12. High precision voltage
current occurrence device, digital multi-meter, dial resistance device etc. is prepared and customer scale
correction can be done.
10-14-1. Overview
This function can perform scale correction of the following input output functions.
･
Measurement range.
･
Output 1 (Output 1 is only current output or voltage output).
･
Output 2 (Output 2 is only current output or voltage output).
･
Remote signal input (With remote signal input only).
･
High precision type transmission signal output (With transmission signal output only).
･
Normal type transmission signal output (With transmission signal output only).
･
CT input (With heater snapping wire alarm only).
10-14-2. Viewpoint of scale correction
Scale correction is done by internal operation process using the following expression [Y=aX+b] and two
correction values namely zero correction (equivalent to b) and span correction (equivalent to a) are used.
[Y]
Input value equivalent to 0
℃
Indicating val
ue
Input value equivalent to 1000
℃
1000
℃
0
℃
Input value [X]
Ideal value line
Sample value line
b: Shift of sample value line
a: Coefficient of sample value line
Y=X
Y=aX+b