Omron ZW Series User Manual page 111

Setting [Display]
Self-down [SELF-D]
Set the hysteresis width based on the fluctuations in the measured values around the trigger level.
The hysteresis will be applied from the start of the measuring period and will prevent timing input
chattering.
As an example, here is an explanation of the procedure for selecting the "Timing"
trigger type setting.
Operating procedure
Steps Key operation
1 - 5 For moving to HOLD, see steps 1 to 5 in p.3-31
6
ZERORST/ ESC ZERORST/ ESC
ZERO/ SET ZERO/ SET
7
ZERORST/ ESC ZERORST/ ESC
ZERO/ SET ZERO/ SET
The sampling period is the period at which the measured value is smaller than
the specified self-trigger level.
Hold measurement is possible without a sync input.
Measured
value
Self-trigger
level
When Self-down is selected, the following items are subsequently displayed:
• Trig level [LEVEL]
Sets the desired self-trigger level.
Range: -999.999999 to 999.999999 (Default value: 0)
• Trig hys [HYS]
Sets the hysteresis width for the self-trigger.
Range: 0 to 999.999999 (Default value: 0.05 % of measurement range)
When a delay time is set, the timing when the measured value
becomes greater than the self-trigger level and the end of the
sampling period will not be synchronous. Sampling will end after the
specified sampling period has elapsed.
Display
Press
press
Select "Timing" as the trigger type.
"TYPE" is displayed on the main display and the
current setting value is displayed on the sub-display.
Press
sub-display blinks.
Select "TIMING" and press
Setting the Output Conditions
Description
Sampling period
Description
or keys to select either of "TRIG" and
key.
ZERO/ SET ZERO/ SET
/ keys to enter the editing mode, and the
ZERO/ SET ZERO/ SET
Chapter 3
Hysteresis width
(for self-trigger)
Action point
Return point
key.
ZW
3-33
User's Manual