Unipulse F350, Operation Manual

Page: 68 / 115

55
7 EXPLANATION OF HOLD FUNCTIONS
55
EX
PLANATION OF HOLD FUNCTIONS
Chapter
7
■
All section
By this method, the hold detection section is specified by the T/H signal.
Detection starts with the T/H signal ON to perform each hold operation.
Control is performed simply by the T/H signal without using the SECTION signal.
Therefore, there are tracking sections and detection sections, but there are no hold deciding
sections.
(Example) All section peak hold
t1: A delay time between the instant
when the T/H signal is inputted and
the instant when the indicated value
is held
Approximately 0.7ms
（ 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
Approximately 0.7ms
（
MAX.
）
t3: A minimum reset signal width
required for releasing the hold
Approximately 0.7ms
（ MIN. ）
The delay time and signal width
expressed apply when the A/D
conversion speed is 3000 times/sec.
They become 10-times when the A/
D conversion speed is 300 times/sec.
Note
：
During the undetermined sections, the judging output varies with fluctuations in the input waveform.
However, the H/E output remains on during the undetermined sections. Read the judging result when
the indicated value becomes stable (immediately before the T/H signal rises).
Indicated value
t2
t3
Internal caluculated value
Detection ・ Hold Section
Undetermind
t
＋
T/H
HI-LO Limit
Judging Output
H/E
Detection ・ Hold Section
t1
t2 t1
t3
Undetermind
OFF
ON
OFF
ON
OFF
ON
OFF
ON
HOLD
Status Display
PEAK
Status Display
ON
Blink Blink
OFF ON
OFF
OFF
OFF
OFF
OFF
HOLD
Button
Section(Note) Section(Note)