Valley Hold - Unipulse F370 Operation Manual

7-5-3. Valley Hold

The maximum value (valley) in the negative direction of the specified period is held.
The period is specified by the setting of "all period", "external signal", "time", or "time
with trigger".
(Example) All Period Valley Hold
T/H
HOLD
Button
HI-LO Limit
Judging Output
H/E
HOLD
Status Display
PEAK
Status Display
t1： A delay time between the instant when the T/H signal is inputted and the instant
when the indicated value is held
1.0ms (max.)
t2： A delay time between the instant when the T/H signal is released and the instant
when the indicated value returns to tracking
1.0ms (max.)
t3：A minimum reset signal width required for releasing the hold
1.0ms (min.)
＋
Sensor Input Value
Detection
Hold Period
t1
OFF
ON
OFF
ON
OFF
Undetermind
Period （ Note）
ON
OFF
ON
OFF ON
OFF Blink
Note: During the undetermined period, the judging output varies with
fluctuations in the input waveform. However, the H/E output
remains on during the undetermined period. Read the judging
result when the indicated value becomes stable (immediately
before the T/H signal rises).
7.HOLD FUNCTIONS
Detection ・ Hold Period
t2 t1
t3
Undetermind
Period （ Note）
OFF ON
OFF Blink
t
Indicated Value
t2
t3
OFF
OFF
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