Larger tank, dimensions in feet, PF = 33.2 pF

Appendix E

After calibration:

12.7pF ≅ 0% ≅ 4 mA or 20 mA

25.4pF ≅ 100% ≅ 20 mA or 4 mA

Larger tank, dimensions in feet:


Cair	= ε	air		7.32 ⋅					4.5				pF = 16.6pF
				7.32 ⋅					4.5
				Log----------------------------------		(	60		⁄		)-
				Log----------------------------------			60		0.63
Coil	= ε	oil		7.32 ⋅					4.5			pF = 33.2pF
				7.32 ⋅					4.5
			Log----------------------------------		(	60		⁄		)-
			Log----------------------------------			60			0.63

For this slightly larger tank, the capacitance ranges from 16.6 pF for 0% (probe in air) to 33.2 pF for 100% (tank filled with oil).

After calibration:

16.6pF ≅ 0% ≅ 4 mA or 20 mA

33.2pF ≅ 100% ≅ 20 mA or 4 mA

SITRANS LC

500

d = 0.63”

60”

(5.0ft)

6” (0.5ft)

L = 54” (4.5ft)

Page 92

SITRANS LC 500 – INSTRUCTION MANUAL

7ML19985GE01

Page 98

Image 98

Siemens LC 500, Sitrans instruction manual Larger tank, dimensions in feet, PF = 33.2 pF

Contents

Sitrans Technical Publications Safety Guidelines Qualified PersonnelTechnical data subject to change Table of Contents Maintenance Iii Appendix C Hart Documentation 113 Applications Introduction Manual Safety NotesSafety marking symbols Long Form Abbreviations and IdentificationsShort form Description Environmental PowerSpecifications Performance Communications OutputsUser Interface Wetted Parts WeightElectrodes Enclosure electronic Process Conditions Approvals Operation & Application Sitrans LC 500 TransmitterOperating Principles Capacitance measurement in a cylindrical metal tank Non-conductive or conductive contents Stilling well Sitrans LC 500 electrodeA non-conductive or irregular tank Measurement Section Probe seal Active shieldActive Inactive Application Sitrans LC Level Measurement USL Switch action Interface Measurement Via Hart Fault SignallingVia the loop current Via the solid-state output Sitrans LC 500 Probe Configuration Probe Configuration Seal Types Electrode AssemblyProcess Connections Pressure and Temperature Considerations Non-Standard Application Sitrans LC 500 Configuration Non-standard applications Handling Electrodes Sitrans LC 500 InstallationInstallation Process Cautions Protection for solid-state switchMounting Instructions Sitrans LC 500 Standard Level Version Supply WiringInterconnection Sitrans LC Interconnection Cable Selecting the correct instrumentation cable Subtract the capacitance for the device Is applications maximum cable lengthMulti-drop applications maximum cable length Which allows for 560 meters on that side Terminals Connecting Sitrans LCConnection Diagram Where the stilling well is welded to the tank 7ML19985GE01 Grounding instructions Metal Tanks Grounding Examples Sitrans LCSystem Grounding referencing Cathodically Protected Metal Tanks Non-Conductive Tanks Safety Grounding Example Hazardous area Non-hazardous area Communications DiagnosticsTypical PLC configuration with Hart Current values used as signals from digital transmitters Applications for Solid-state Output Settings Factory SettingsSwitch Protection Diode Setting Description Setting Interconnection User Interface Sitrans LC 500 User InterfaceLCD display Description Menu Group Details How to access the dataMenu Levels 00 to 0F and 10 to 1F Adjusting the value Rotary switchAccess to a menu item Push-buttons Transmitter Variables Transmitter Variable User-defined Functions Units Start Up Start-up Sitrans LCQuick Start Quick Start Sequence Rotary Switch Positions Quick Reference Num To change from menu 10 to menu Menu levels 0To change from menu 00 to menu Calibration using push-button adjustment Current percent of span = 14/20 = 70% Changing stepsize value menu100% value is set Start Up Calibration using Hart Start Up Number Description Number Test function MaintenanceMaintenance Inspections Maintenance If you are unable to change settings Troubleshooting Sitrans LCTroubleshooting Error Codes Hart Error Messages and Error CodesError Messages push-button operation Error Description Cause Message Appendix a Menu Groups Rotary Left Switch Description Values Position Arrow Transmitter Variable Settings menu levelStepsize Update Value Menu Items Lower Sensor Limit Set the rotary switch to BDamping Upper Sensor Limit Rotary SwitchDelta Range Setting Description Values Position Lower Range Value Affected Rotary Left Switch Mode DescriptionAffected Rotary Left Switch Mode Dynamic Value, Primary Variable PV menu 00 and menu Transmitter Variable Values menu levelUpper Range Value To change from menu 10 to menu Set the rotary switch to Rotary Left Description Values SwitchRotary Switch Left Arrow Description Position Display the Highest / Lowest Recorded Value Rotary Left Switch Mode Description Action Values Transmitter Variables Dynamic Value menu level Rotary Left Added Switch Arrow Analog Output Signalling proportional or 2-state menu levelUpper Threshold Delay 2-state mode Indicator Upper Threshold Setting 2-state mode Rotary Left Added SwitchArrow Indicator Mode Description Values Position Analog Signalling Mode 2-state menu level Lower Threshold Setting 2-state mode State State Low Rotary Left ModeState High For detailed information, see Fault Signalling on Analog Fault Signalling 2-stateState mode must be selected at menu 22.0 mA Rotary Left Des Switch Digital Output Signalling solid-state output menu levelUpper Threshold Delay solid-state output Identifier Cription Value Lower Threshold Delay solid-state outputUpper Threshold Setting solid-state output Rotary Left Added Des Switch Mode Rotary Left Des Switch ModeLower Threshold Setting solid-state output Indicator Cription = cc Digital Signalling Mode solid-state outputRotary Left Des Switch Arrow Mode Cription Action Action Values Digital Fault SignallingRotary Left Switch Mode Switch Left Arrow Description Display Meaning Position Output Signal Processing TestFactory Settings Miscellaneous Settings Rotary Switch Left Arrow Description Mode Values PositionProtection Display Switch Local Range Inversion Appendix B Appendix B LCD display examplesLCD alphanumeric display examples Hart Device Descriptor DD Appendix C Hart DocumentationHart information Simatic Process Device Manager PDM Sitrans LC 500 DD Menu/Variable Organization Hart Response Code Information Hart Conformance and Command Class Command Description Usage Number Damping information Command Description UsageGeneral Transmitter Information Non-volatile Memory Data Storage MultiDrop operation Additional Universal Command SpecificationsBurst mode Units conversions Appendix D Block Diagram, and Correlation table, mA to % Sitrans LC 500 Block Diagram Appendix D Correlation % 100% to 4-20 mA or 20-4 mARange 0 100 % Current in mA Series Threaded Standard VersionStandard Version S-Series, Threaded Appendix E Features Standard Version S-Series, Threaded Series Cable Version With weight With anchor Features Standard Version S-Series, Flanged Series, Welded Flange Standard Version D-Series, Machined Flange Features Standard Version D-SeriesFeatures Standard Version DD-Series Series All wetted parts made of PFA Features Standard Version, Probe/ Thermal IsolatorSD-Series Probe/Thermal Isolator Thermal isolator to prevent Interface Version Interface Version, threaded optional sanitary and flanged Features Sanitary Version, Tri-Clamp Sanitary Version Flanges Flange Standards Generic Application Calculations Examples using dimensions above Capacitance in airApplications Examples Capacitance in oil Larger tank, dimensions in feet PF = 33.2 pF 90.0 Device settingsCAn 08.0 State fault signalling enabled F Hi selected Application Analog fault signalling 2-state outputCurrent loop is in 2-state mode C Hi selected CHi USL is set to 83.50 pF LSL is set to 7.3 pF Sitrans LC 500 / Pointek CLS Appendix F ApprovalsCE Certificate Appendix F Hinweis CE BescheinigungWir erklären hiermit auf eigene Verantwortung, dass der Instrument label Sitrans LC Kema certificate and schedules Appendix F Appendix F Appendix F Appendix F Appendix F Appendix F Appendix F Namur recommendation NE Application SpecificationsCertificates and Approvals Approval Glossary Glossary 7ML19985GE01 Index IndexNumerics Wiring Index Quick Reference Sitrans LC Quick Reference Rotary Switch Positions Quick Reference Page 7ml19985GE01

Appendix E

Larger tank, dimensions in feet:

pF = 33.2pF