Fluid Components International MT91 Manual Glossary User Manual
Appendix b. glossary of terms
Doc. No. 003185 Rev. B
B - 1
Model MT91 Multipoint Flowmeter
APPENDIX B - GLOSSARY
FLUID COMPONENTS INTL
Appendix B. Glossary of Terms
Area
Cross-sectional area for a process line or duct.
(
)
Are a o f a c irc ular duc t = p r 2 o r p
I .D.
2
2
Area of a Rectangular duct = h
w
×
Bipolar
Allows users to view both negative and positive values for
D
R.
DVM
Digital Voltmeter
EIA
Electronics Interface Association
C1 - C5
C1 through C5 are flow coefficients for the balanced polynomial equation. The
flow coefficients characterize the shape of the curve generated by the equation.
Flow
C
R
C
R
C
C
R
C
R
=
+
+
+
+
−
1
2
3
4
5
2
2
(
)
(
)
(
)
(
)
∆
∆
∆
∆
C1- C5 are unique to each sensing point. On the Delta R Paramter sheet,
they are shown as H01C1 through H01C5 for sensing point 1. (H = head,
01 = sensing point 1).
Comm Mode
Serial communication mode. There are three options: EIA-232, EIA-422, EIA-
485.
CorrF[1] - [4]
CorrF[1] through CorrF[4] are correction factors that apply to the Corrected Flow
Rate equation. See Chapter 3 - Operation for more information.
Corrected Flow Rate = C
1
+
Ч
+
Ч
+
Ч
(
) (
)
(
)
C
m
C
m
C
m
2
0
3
0
2
4
0
3
dR Min
D
R value low end cutoff. Should be set to approximately 5 ohms less than the
lowest calibrated
D
R.
dr Max
D
R value high end cutoff. Should be set to approximately 5 ohms greater than the
lowest calibrated
D
R.
Flow Element
The Flow Element includes the local enclosure and the sensing points.
Flow Factor
The Flow Factor is the multiplier that converts the internal flow rate (SFPS) to the
user selected flow untis.
Flow Min
Minimum calibrated flow rate in standard feet per second (SFPS)
Flow Max
Maximum calibrated flow rate in standard feet per second (SFPS)
Flow Transmitter
The Flow Transmitter consists of the remote enclosure and all of the electronics
contained within.
Full Scale
Full scale is from the zero value to the max flow value. For zero based
applications this is from 0.00 to the maximum flow value. For non-zero based
applications full scale is from minimum flow value to the maximum flow value.
Offset 1 - 16
Offset value for each sensing point. Offset Equation =
D
R + Offset Value