117
Reference Manual
IP2048/RM, Rev AA
Appendix F: Configuring Using HART
January 2015
Flumes that deviate from the standard “3/2 power law”, e.g. round-bottomed flumes, must use
the “
Special Plot
” profile option that is based on flow versus height tabulations (see
page 112
).
Setting-up procedure for “
Flume/Weir-3/2
”:
1.
Use parameter
Tank Shape/NLP
(
P011
) to select “
Flume/Weir-3/2
”.
2.
Enter the scale factor into the
PV Scale Factor
parameter (
page 121
).
Figure F-6. Rectangular weir cross-section
Tank Shape/NLP (P011) = “
V-Notch-5/2
”
This setting is applicable when flow measurements are needed from an open channel with a
V-notch profile.
The rate of flow through a V-notch is calculated using:
Q = k x h
Pwr
Where ‘h’ is the live liquid level, ‘Q’ is flow rate per second, ‘Pwr’ is the power factor, and ‘k’ is a
user-entered scale factor.
The transmitter automatically populates parameter
Power Factor / Profile Height
(
page 122
)
with a power factor from
Table F-1 on page 119
.
4–20 mA/HART
Mobrey MSP400RH
or MSP900GH
Side
View
End View Downstream
Mobrey MCU900 Series
Control Unit
Содержание MSP400RH
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