Emerson Rosemount 3100 Series Reference Manual

150
Reference Manual
00809-0100-4840, Rev CB
Appendix F: Programming the 3102 and 3105 using HART
February 2015
Programming the 3102 and 3105 using HART
F.3.13 Flow measurement
Table F-1 on page F-152 lists the Tank Shape/Non-Linear Profile (P011) options that select a
standard flow structure profile and the conversion (scale) factors used to calculate a flow
process value (PV).
Tank Shape/NLP (P011) = “Special Plot”
The “Special Plot” option is used for irregular-shaped flow profiles.
See page 145 for a full description.
Tank Shape/NLP (P011) = “Flume/Weir-3/2”
This setting is applicable when flow rate measurements are needed from an open channel with a
flume or weir profile (see Figure F-6).
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 145).
Setting-up procedure for “Flume/Weir-3/2”:
1. Use parameter Tank Shape/NLP (P011) to select “Flume/Weir-3/2”.
The transmitter will then automatically populate the parameter Power Factor
(page 156) with a power factor from Tab le F -1.
2. Enter a scale factor into the PV Scale Factor parameter (page 154).
Figure F-6. Rectangular Weir Cross-section
4–20 mA/HART
Rosemount
3102 or 3105
Rosemount
3490 Series
Side
View
End View Downstream

Emerson Rosemount 3100 Series Specifications

General

Brand	Emerson
Model	Rosemount 3100 Series
Category	Transmitter
Language	English