Fluid Components International MT91 Manual Glossary - Manual

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