Valley Hold - Unipulse f395 Operation Manual

10.Multi-Hold Mode

10-3-3. Valley Hold

The maximum value (valley value) in the negative direction is held.
High/Low
Judgment
COMPLETE
t1: Delay time between the instant when the T/H signal is input and the instant when the
t2: Delay time between the instant when the T/H signal is cancelled and the instant when
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Sensor input value
Detection/hold period
t1
OFF
T/H
ON
OFF
Limit Indeterminate
period (Note
Output
ON
OFF
ON
Note: During the indeterminate period, the Judgment output
indicated value is held.
Ts+0.8msec (max.)
the indicated value returns to tracking.
Ts+0.8msec (max.)
Detection/hold period
t2 t1
Indeterminate
period (Note
varies with variations in the input waveform. However, the
COMPLETE output is kept on during the indeterminate
period. Read the result of judgment when the indicated
value becomes stable (immediately before the rising
edge of T/H).
t
Indicated value
t2