External Signal + Time - Unipulse F350 Operation Manual

■External signal + time

By this method, the hold detection section is specified as a timer. Detection starts with the
SECTION signal ON, and ends when the set time (detection time) has elapsed.
The hold value is maintained until the hold reset signal is turned on.
The hold is released by turning on the T/H signal as a reset signal.
There are tracking sections, detection sections, and hold deciding sections.
(Example) External signal+ Time specified section peak hold
SECTION
HOLD
Detection time
T/H
H/E
HOLD
Status Display
PEAK
Status Display
By turning on the SECTION signal again without turning on the T/H signal while the hold is
fixed, the hold is released and re-detection is started.
For details, see "7-4.Auto reset function" on page 58.
■Detection time
Set the hold detection time.
《Setting value》
◇ Detection time setting method
1.
2.
3.
57
＋
Indicated value
Detection
t2
t1
OFF
ON
OFF
Button
ON
OFF
ON
OFF
ON
OFF
HI-LO Limit
Judging Output
ON
OFF
ON
OFF ON
OFF Blink
0.01～9.99 [sec.]
Select setting mode 1.
Press once.
FNC
Set "Detection time."
Press five times ⇒ "Detection time" is displayed.
Press , and the highest digit blinks.
Move to the lower digits with
Input the setting value with
Press to validate it.
Press twice to go back to the indicated value display.
ESC
7 EXPLANATION OF HOLD FUNCTIONS
Internal calculatde value
Hold Section
t
t3
Fixed
ON OFF
ON OFF
.（Initial value：1）
.
t1: A minimum SECTION signal width
required for beginning detection
Approximately 0.7ms （MIN.）
t2: A delay time between the instant
when the detection time is ended 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
conversion speed is 3000 times/sec.
They become 10-times when the A/D
conversion speed is 300 times/sec.
Ch1 Ch 2
H I LO
H I OK LO PEAK
Ch1 Ch 2
H I LO
A/D
Chapter
7
H I LO
HOLD
H I LO
57