Omron ZJ-SD Series User Manual page 119

Comparing Measured Values (Differentiation
Function)
Use the differentiation function to detect only sudden changes in the measured values that
occur during very short periods of time.
The differentiation function detects changes between the present value and the measured
value that was active just before the comparing pitch. The coefficient of this comparing pitch is
defined as the differentiation cycle.
The relationship between the differentiation cycle and comparing pitch can be calculated by
the following equation:
Comparing pitch = differentiation cycle x 1 ms
Example: When differentiation cycle = 10
Present value
Sampling
Sampling time
(1 ms)
Displayed value
Moving to the FUN mode and SPCL
1.
Set the mode switch to FUN.
2.
Use the LEFT and RIGHT keys to display
[SPCL] on the main display.
Comparing Measured Values (Differentiation Function)
Comparing pitch 10ms (=1 ms x 10)
Section 6
ZJ-SD
105
User's Manual