FCI MT100 - Appendix Bglossary; Abbreviations; Definitions

MT100 Multipoint Flow Meter APPENDIX B – GLOSSARY
APPENDIX B GLOSSARY
Abbreviations
Delta-R (ΔR)
Resistance differential
Delta-T (ΔT)
Temperature differential
ESD
Electrostatic discharge
FCI
Fluid Components International
HTR
Heater
GND
Ground
LCD
Liquid crystal display
LED
Light Emitting Diode
NCMH
Normal Cubic Meter per Hour
RTD
Resistance Temperature Detector
SFPS
Standard Feet per Second
Definitions
Active RTD
The flow element part that senses the fluid flow rate.
Resistance Differential
The difference in resistance between the active and reference RTDs.
Delta-R (ΔR)
Temperature Differential
The difference in temperature between the active and reference RTDs.
Delta-T (ΔT)
Flow Transmitter
The portion of the flow meter that conditions, converts and scales the flow signal.
Heater (HTR)
The flow element part that heats the active RTD.
Local Enclosure
The enclosure attached to the flow element (usually contains the wiring
terminal block).
Reference Flat
A flat part on the sensor head that helps to orient the sensor head to the flow.
Reference RTD
The flow element part that senses the fluid temperature.
Remote Enclosure
The enclosure that houses the flow transmitter remotely from the sensor head.
Resistance Temperature
A sensor whose resistance changes proportionally to temperature changes.
Detector (RTD)
Span
An adjustment that sets the transmitter's flow rate output range.
Also, the difference between the upper and lower flow rate values.
Thermowell
The flow element part that protects the heater and RTDs from the process fluid.
Turndown
The ratio of minimum flow rate to maximum flow rate.
Zero
An adjustment that sets the flow transmitter's output at zero flow.
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