Hioki 8835-01 - Page 166

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7.7 Making the Settings of the 8940 F/V UNIT
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Rotation Stops
Until the next cycle is
c
onfirmed, the previous
value is held.
The previous value is
h
alved. Stopping can be
confirmed.
Hold ON
Hold OFF
Rotation Stops
When Hold is OFF (10 ms)
A
t frequencies of less than 100 Hz
,
the signal is halved.
When Hold is OFF (1 s)
A
t frequencies of less than 1 Hz,
the signal is halved.
0
0
100 Hz
1Hz
200 Hz
2Hz
When Hold is ON
T
he initial value is held (the signal
is
n
ot halved), so the result is as
shown in the diagram below.
Actual Event
F
requency drops to 0 Hz from a
c
ertain frequency, then increases
from that point.
About Hold ON/OFF
(1) Hold ON/OFF in the stopping operation
For Frequency and RPM measurement, results are displayed after one
confirmation cycle.
When measuring phenomena such as stopping of a rotating body, if Hold is
ON, stopping cannot be detected because there is no confirmation cycle.
When Hold is OFF, half of the previous measurement value is displayed if the
confirmation cycle does not occur within the specified time (10 ms or 1 s).
Therefore, a condition such as stopping can be estimated by gradually
approaching zero.
(2) The following are differences depending on whether Hold is ON or OFF when the
frequency drops to 0 Hz from a certain frequency, then increases from that point.