Ultraflux UF 801-P, Руководство пользователя

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NT228B GB2 39 / 98
7.6 Factory Settings (Advanced mode only)
The first possibility is to set special probes:
---SPECIAL PROBES---
------Probe SA------
To = xx.x

s

F = x MHz
Angle = 54°x
Text = abcd
------Probe SA------
To = xx.x

s

F = xxx kHz
Angle = 0°x
Text = efgh
To is the dead time through the
probe face or wedge.
F is the probe crystal frequency.
Angle concerns only clamp-on
probes. We set here the typical
refracted angle in carbon steel.
The attached text can only be
entered with the PC software. It
will then appear in the probes list.
The second possibility is the entering of a linearization or error curve
compensation.
The graph below shows an example and attached settings.
Note that one compensation curve can be entered for positive flows, another one
for negative.
----- +Q or -Q ----
Q Ref = 0 or x m
3
/h
Coef. 0% = 1.000
Coef. 10% = 1.005
Coef. 20% = 1.012
Coef. 30% = 1.008
Coef. 40% = 1.007
Coef. 50% = 1.005
Coef. 60% = 1.003
Coef. 70% = 1.001
Coef. 80% = 1.000
Coef. 90% = 0.999
Coef. 100% = 0.998
First operation is to enter a Q Ref. adapted to the application. It is recommended
to enter its value a little bit over Q max flow range. Above Q Ref., the
compensation is inactive (coefficient = 1.00).
Thus, with Q Ref. = 0, the linearization function is not active.
So, with Q Réf.=1000 m
3
/h, supposing a whole error at -0.8% at 30% of the
range, you must enter a compensation coefficient = 1.008 (+0.8%). UF 801-P
interpolates between two successive points.