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52
7
EXPLANATION OF HOLD FUNCTIONS
52
EXPLANATION OF HOLD FUNCTIONS
Chapter
7
■
Peak hold
The maximum value in the positive direction (peak value) of the specified section is held.
The section is specified by the setting of "all section," "external signal," or "external time."
(Example) Externally specified section peak hold
t1: A delay time between the instant
when the SECTION signal is inputted
and the instant when the value to be
held is detected
Approximately 0.7ms
(
MAX.
)
t2: A delay time between the instant
when the SECTION signal is released
and the instant when the value to be
held is determined
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.
■
Bottom hold
The maximum value in the negative direction (bottom value) of the specified section is held.
The section is specified by the setting of "all section," "external signal," or "external time."
(Example) All section Bottom 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 section, the judging output varies with fluctuations in the input waveform.
However, the H/E output remains on during the undetermined section. Read the judging result when the
indicated value becomes stable (immediately before the T/H signal rises).
Indicated value
t3
Internal calculated
Detection
t
+
T/H
HI-LO Limit
Judging Output
H/E
Hold Section
t2
t1
Fixed
SECTION
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
ON
Blink
ON
OFF
ON
OFF
OFF
OFF
HOLD
Button
HOLD
Status Display
PEAK
Status Display
value
Indicated
t2
t3
Internal calculated
Detection
・
Hold Section
Undetermind
t
+
T/H
HI-LO Limit
Judging Output
H/E
Detection
・
Hold Section
t1
t2
t1
t3
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)
Undetermind
Section (Note)
Value
value
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