App.e-3, 3) signal evaluation, Process mode processing – Yokogawa GC8000 Process Gas Chromatograph User Manual
Page 476: App.e
<Appendix E Computation Scheme>
App.E-3
IM 11B08A01-01E
Waveform of detector signals
Waveform after filtering
f=0.5
Waveform after sampling
(t
smp
=40ms)
Waveform after sampling
(t
smp
=80ms)
F020202.ai
(3) Signal Evaluation
The signal evaluation step calculates the standard deviation of sampled 20 signals according to
the following formulas:
y
avrg
=
y
i
1
20
t
i=t–19
∑
s
d
=
(y
i
– y
avrg
)
2
1
20
t
i=t–19
∑
Where:
y
i
: sampled signals (20 signals)
s
d
: standard deviation of the sampled data
Process Mode Processing
There are four kinds of process mode:
1. Signal level processing
2. Peak processing
3. Deviation component computation processing
4. Additional computation processing
Up to 255 settings can be computed and they are separately divided for each stream.
2nd Edition : May 11, 2012-00
App.E