38
5
Settings and Operations Related to Indicated Values
38
Setting
s a
n
d Op
er
ations Rela
te
d to
In
dic
at
ed
Va
lu
es
Chapter
5
5-5.
Digital low-pass filter
This low-pass filter screens the sampled data and cancels unnecessary noise.
Like the analog filter, set the cut-off frequency.
A settable cut-off frequency changes according to the sampling rate. Select the most appropriate
value in accordance with kinds of measurements and setting environments.
■
Digital low-pass filter setting method
1.
Select setting mode 5.
→
(four times)
2.
Select "digital low-pass filter".
Press the
key five times.
Set the digital low-pass filter using the
(numerical value input) and
(shift) keys,
and confirm it with the
key.
3.
Press the
key to return to the indicated value
display.
Sampling rate
Digital low-pass filter
3000 times/sec.
10 to 300 Hz
300 times/sec.
1.0 to 30.0 Hz
30 times/sec.
0.1 to 3.00 Hz
Use this filter in case noises have not been removed only by an analog filter. In
order to remove lower frequency noises, slow the sampling rate so that a low-
pass filter of lower frequency can be set.
Key points
FNC
＋
－
ZERO
Digital low-pass filter
(0, 10 to 300)
Sampling rate
3000 times/sec.:
300 times/sec.:
30 times/sec.:
10 to 300
1.0 to 30.0
0.10 to 3.00
CAL
HOLD
GAIN
CAL
ZERO
HOLD
FNC
＋
－
