[MI 019-120] I/A Series Mass Flowtubes Models CFS20 ... - Invensys

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MI 019-120 – June 20113. WiringBKBUBKBUWHBKWHBKWIRE PAIRSTO TRANSMITTERBKGNBKGNBNBKBNBKWIRE PAIRSTO TRANSMITTERRDBKRDBKYEBKYEBKWIRE PAIRSFROM FLOWTUBEFigure 16. Terminal Box Wiring Color Orientation24
4. StartupSizing Your Flowtube and Determining Pressure LossIn most cases a flowtube is specified with a particular process application in mind. However, toapply a flowtube to another application, its sizing and pressure loss must be considered. The bestway to do this is to use the FlowExpert Pro software program on the Invensys web site atFlowExpertPro.com.Filling the FlowtubeFilling of the flowtube requires a period of continual flushing to remove all air from the flowtube.Proceed as follows:1. Slowly fill the flowtube, avoiding hydraulic shock to flowmeter and associated piping.2. Flush at highest possible flow rate within operating range for a minimum of fiveminutes. Flushing rate must be above 2 ft/s.Zeroing1. Close valves to ensure zero flow.2. Allow 30 seconds minimum for flow to settle at zero.Flowtube is now ready for zeroing with the CFT50 or CFT51 Transmitter. For zeroing procedurefrom the CFT50 or CFT51 transmitter keypad or a HART Communicator, refer to MI 019-132or MI 019-140 respectively.If elapsed time between flushing and zeroing exceeds 10 minutes, the flowtube must be flushedagain for five minutes and the zeroing procedure repeated.NOTEFlowtube must remain full with process fluid to maintain accurate, repeatableresults. In applications where flowtube is frequently emptied or partially emptiedand refilled, flowtube must be properly filled, avoiding hydraulic shock. Rezeroingis not generally required.25
Page 1 and 2: InstructionMI 019-120June 2011I/A S
Page 3 and 4: ContentsFigures....................
Page 5 and 6: Figures1 Data Plate Location and Fl
Page 7 and 8: Tables1 Reference Documents .......
Page 9 and 10: 1. IntroductionGeneral DescriptionT
Page 11 and 12: 1. Introduction MI 019-120 - June 2
Page 19 and 20: 2. InstallationFlowtube Identificat
Page 21 and 22: 2. Installation MI 019-120 - June 2
Page 27 and 28: 3. WiringThe installation and wirin
Page 29 and 30: 3. Wiring MI 019-120 - June 2011Jun
Page 31: 3. Wiring MI 019-120 - June 20114.
Page 35 and 36: 5. TroubleshootingRTD Res Low or RT
Page 37 and 38: 6. MaintenanceSanitary End Connecti
Page 39 and 40: IndexCCoil Resistances 5EElectrical

[MI 019-120] I/A Series Mass Flowtubes Models CFS20 ... - Invensys

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