Ultraflux UF 801-P, Руководство пользователя

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NT228B GB2 38 / 98
As so, on crude oil, Crit. Reynolds=2500 / LBR=5 give better results.
On Air at 1 bar, Crit.Reynolds =1500 / LBR=4 seem more adapted.
We remind you that this transition is very weak. We can only speak about
statistical results. In theory, it is necessary to have more than 20 pipe diameter
straight length after a disturbance to recover a laminar flow.
Installing the probes just after the disturbance will force a turbulent flow: setting
KH=Manual= ~1.10 could be more efficient that letting the unit manage the
coefficient.
7.5
Response time / flow display filtering
Without any consequence on the flow results, filter setting permits adaptation of
averaging period. A high filter value gives very stable flow readings. But, if the
actual flow changes suddenly (when starts or stops of a pump for instance), the
UF 801-P flow display will be in late and not realistic for some time.
The Delta V Filter parameter permits an efficient compromise:
UF 801-P does raw acquisitions of
Delta T and calculates flow
instantaneous velocity (V) before
any filtering.
So, if this raw V result changes
suddenly, setting a threshold (Delta
V Filter) in relation to your
installation will permit to by-pass the
filter applied on the flow reading, to
have a short response time during
this transition.
------- PIPE -------
------General-------
Q Unit = l/s…
Memory = 30 s
Filter = 10 s
DeltaV Filt=0.5 m/s
-------Graph -------
Q Period = 1s to 24h
Q Qmin = 0.0
Q Qmax = 500.0
Advanced settings or tests on amplification gain management
------- PIPE -------
-------Chord1-------
Probe (SE) = xxxxxx
Mounting = xxxxxx
Ext.Coeff =Auto/Man
Delta To = x.xx ns
Gain Type =Auto/Man
Gain Max = xxx dB
or Gain = xxx dB
The amplification gain can be set
in Manual mode for a test.
Its max. range can be limited to
avoid some EMC or other noises
capture risks.
If allowed by Ultraflux, it is also
possible to adapt DSP treatment
modes (TRT_ER in factory
settings)