Siemens LC 500, Treadmill Sitrans User Manual

Instruction Manual January 2003

sitrans

LC 500

Safety Guidelines

Warning notices must be observed to ensure personal safety as well as that of others, and to protect the product and the connected equipment. These warning notices are accompanied by a clarification of the level of caution to be observed.

Qualified Personnel

This device/system may only be set up and operated in conjunction with this manual. Qualified personnel are only authorized to install and operate this equipment in accordance with established safety practices and standards.

Warning: This product can only function properly and safely if it is correctly transported,

stored, installed, set up, operated, and maintained.

Note: Always use product in accordance with specifications.

Disclaimer of Liability

This document is available in bound version and in electronic version. We encourage users to purchase authorized bound manuals, or to view electronic versions as designed and authored by Siemens Milltronics Process Instruments Inc. Siemens Milltronics Process Instruments Inc. will not be responsible for the contents of partial or whole reproductions of either bound or electronic versions.

MILLTRONICS®is a registered trademark of Siemens Milltronics Process Instruments Inc.

Contact SMPI Techni cal Publications at th e following address:

Technical Publications Siemens Milltronics Process Instruments Inc. 1954 Technology Drive, P.O. Box 4225 Peterborough, Ontario, Canada, K9J 7B1 Email: techpubs@siemens-milltronics.com

While we have verified the contents of this manual for agreement with the instrumentation described, variations remain possible. Thus we cannot guarantee full agreement. The contents of this manual are regularly reviewed and corrections are included in subsequent editions. We welcome all suggestions for improvement.

Technical data subject to change.

For the library of SMPI instruction manuals, visit our Web site: www.siemens-milltronics.com

Table of Contents

SITRANS LC 500 ............................. .....................................................................................1

Applications ....................................................................................................................................1

Safety Notes .............................................................................................................................................2

Safety marking symbols ..............................................................................................................2

The Manual .....................................................................................................................................2

Abbreviations and Identifications .............................................................................................3

Technical Specifications: SITRANS LC 500 ...................................................................4

SITRANS LC 500: Transmitter ............................................................................................8

Operating Principles ...............................................................................................................................8

The SITRANS LC 500 variable frequency oscillator .......................................................................8

The SITRANS LC 500 electrode .........................................................................................................10

Application: SITRANS LC 500 ...................................................................................................12

Level Measurement ....................................................................................................................13

Interface Measurement .............................................................................................................14

Switch action ................................................................................................................................14

Fault Signalling .............................................................................................................................15

SITRANS LC 500: Probe Configuration ..........................................................................16

SITRANS LC 500 Electrode (Probe) Characteristics .....................................................................16

Electrode Assembly ..............................................................................................................................17

Process Connections ..................................................................................................................17

Seal Types .....................................................................................................................................17

Process Connection and Seal Configuration of SITRANS LC 500 ..................................17

Pressure and Temperature Considerations ..........................................................................18

Non-standard applications .......................................................................................................19

Table of Contents

SITRANS LC 500: Installation ....... ...................................................................................20

Handling Electrodes ..............................................................................................................................20

Mounting Instructions ..........................................................................................................................21

Protection for solid-state switch .............................................................................................21

Process Cautions .......................................................................................................................21

SITRANS LC 500: Standard Level Version .............................................................................22

Interconnection: SITRANS LC 500 ..................................... ............................................23

Wiring .......................................................................................................................................................23

Supply .............................................................................................................................................23

Cable ...............................................................................................................................................24

Selecting the correct instrumentation cable ......................................................................24

Terminals .................................................................................................................................................26

Connecting SITRANS LC 500 ..............................................................................................................26

Connection Diagram .................................................................................................................26

Protection for solid-state switch .............................................................................................27

Grounding instructions ..............................................................................................................27

Grounding Examples: SITRANS LC 500 ...........................................................................................28

System Grounding (referencing) .............................................................................................28

Metal Tanks ................................................................................................................................28

Cathodically Protected Metal Tanks ....................................................................................29

Non-Conductive Tanks ............................................................................................................29

Safety Grounding .........................................................................................................................30

Communications ....................................................................................................................................32

Typical PLC configuration with HART ..................................................................................32

Diagnostics .............................................................................................................................................32

Table of Contents

Applications for Solid-state Output ..................................................................................................33

Switch Protection (Diode) .........................................................................................................34

Factory Settings .....................................................................................................................................34

Settings: .......................................................................................................................................34

The SITRANS LC 500 User Interface .............................................................................36

The LCD (display) ...................................................................................................................................36

How to access the data: ......................................................................................................................37

Menu Levels 00 to 0F and 10 to 1F ..........................................................................................37

The rotary switch ...................................................................................................................................38

The push-buttons ........................................................................................................................38

Access to a menu item: ............................................................................................................38

Adjusting the value .....................................................................................................................38

Transmitter Variables ...........................................................................................................................39

Start-up: SITRANS LC 500 ...................................................................... .........................40

Quick Start ..............................................................................................................................................40

Menu levels 0 and 1 ..............................................................................................................................42

Start up using push-button calibration: (overview) ......................................................................42

Calibration using push-button adjustment ......................................................................................43

Calibration using HART ........................................................................................................................46

Maintenance ........ ........ ...... ...... ....... ...... ........ ...... ....... ...... ........ ...... ...... ....... ...... ........ .........50

Test function ...........................................................................................................................................50

Inspections ....................................................................................................................................50

Troubleshooting: SITRANS LC 500 .. ...............................................................................52

Error Messages and Error Codes ...................................................................................53

Error Messages (push-button operation) .......................................................................................53

Error Codes (HART) ...............................................................................................................................53

Appendix A: Menu Groups ..............................................................................................54

Menu Items .............................................................................................................................................55

Transmitter: Variable Settings: menu level 0......................................................................................... 55

Transmitter Variable Values: menu level 0............................................................................................. 59

Analog Output Signalling (proportional or 2-state): menu level 0..................................................... 62

Analog Signalling Mode (2-state): menu level 0................................................................................... 64

Digital Output Signalling (solid-state output): menu level 1 ............................................................... 67

Miscellaneous............................................................................................................................................... 72

Appendix B: LCD display examples ..............................................................................74

LCD: alphanumeric display examples ....................................................................................74

Appendix C: HART Documentat ion ...............................................................................75

HART Communications for the SITRANS LC 500 ..........................................................................75

HART Device Descriptor (DD) ..................................................................................................75

Simatic Process Device Manager (PDM) .............................................................................75

HART information ..................................................................................................................................75

Expanded Device Type Code: ................................................................................................75

Physical Layer Information .....................................................................................................75

SITRANS LC 500 DD Menu/Variable Organization .......................................................................76

HART Response Code Information ...................................................................................................77

Bit #7: Field Device Malfunction ............................................................................................77

Bit #6: Configuration Changed ...............................................................................................77

Bit #5: Cold Start ........................................................................................................................77

Bit #4: Extended Status Available .........................................................................................77

Bit #3: Output Current Fixed ....................................................................................................77

Bit #2: Primary Variable Analog Output Saturated ...........................................................77

Bit #0: Primary Variable Out of Limits ...................................................................................77

HART Conformance and Command Class ......................................................................................78

General Transmitter Information .......................................................................................................79

Damping information ................................................................................................................79

Non-volatile Memory Data Storage .....................................................................................79

MultiDrop operation .................................................................................................................80

Burst mode .................................................................................................................................80

Units conversions .....................................................................................................................80

Additional Universal Command Specifications .............................................................................80

Appendix D: Block Diagram, and Correlation table, mA to % ................................81

Correlation Table: 0% - 100% to 4-20 mA or 20-4 mA ...................................................................82

Table of Contents

Appendix E: SITRANS LC 500, alternate versions and application details ...........83

Standard Version ...................................................................................................................................83

Standard Version S-Series, Threaded ..................................................................................83

Standard Version S-Series, Threaded ...................................................................................84

Standard Version S-Series, Welded and Machined Flanged Versions .........................85

Standard Version D-Series, Machined Flange ....................................................................86

Interface Version ...................................................................................................................................88

Sanitary Version ....................................................................................................................................89

Flanges .....................................................................................................................................................90

Flange Standards ........................................................................................................................90

Applications Examples .........................................................................................................................91

Generic Application Calculations ............................................................................................91

Application: level indicator and solid-state switch output ................................................93

Application: Analog fault signalling (2-state output) ..........................................................94

iii

Appendix F: Approvals .....................................................................................................96

CE Certificate ................................................................................................................................96

CE Certificate ................................................................................................................................97

Instrument label: SITRANS LC 500 ...................................................................................................98

KEMA certificate and schedules .......................................................................................................99

Certificates and Approvals .............................................................................................................. 107

Table of Contents

NAMUR recommendation NE 43 .......................................................................................... 107

Control Drawing FM/CSA Approval ............................................................................................... 108

SITRANS LC 500 ................................................................................................................................. 108

Glossary ............ ................................. ............................... ............................... .................109

Index .................. .............. ............ ............. ............ ............. ............ ............... ............ ......... 111

Quick Reference: SITRANS LC 500 .............................................................................. 113

Quick Start ............................................................................................................................................113

SITRANS LC 500

SITRANS LC 500 is a high performance 2-wire capacitance instrument for continuous level and interface measurement in extreme or critical conditions. It uses a unique frequencybased measurement system and patented Active-Shield technology to deliver highly accurate, repeatable results. The measurement is unaffected by moisture, vapors, foam, temperature and pressure variations, or material build-up around the mounting glands.

SITRANS LC 500 combines a sophisticated, easy-to-adjust transmitter (MSP-2002-2) with a measurement electrode and process seal selected from a range of options variety of applications. The advanced electronics and integrated local display provide for one-step calibration without interrupting the process, and the probe shield design eliminates the need for frequent recalibration.

SITRANS LC 500 can be used as a level controller, by connecting the mA output and/or the solid-state switch to a relay, and activating a pump via an auxiliary power circuit.

The SITRANS LC 500 is equipped with:

• Smart 2-wire transmitter

• Remote adjustable commissioning / control capabilities via HART

• Analog (2-wire) 4 to 20mA / 20 to 4 mA output

• Solid-state and Current detection (4 or 20 mA / 20 or 4 mA, two-state functionality)

• Adjustable hystereses on/off for solid-state output and for current signal

• Damping functionality

• Signal current (measurement/detection) according to NAMUR NE 43

• Integrated local display for commissioning and services activities

• Full range of local/remote diagnostic facilities

• Pre-detection of trip point for high safety requirements

• Polarity-insensitive current loop

• Integrated zener safety barrier for Intrinsically Safe applications

, to suit a wide

Introduction

Applications

• General Purpose, Dust Ignition Proof, Explosion Proof, and Intrinsically Safe

• A wide range of applications in high pressure and temperature, chemically aggressive, and other extreme measurement/detection environments

• Liquids, Solids, Quality, and Interface measurement

• Viscous non-conducting and conducting liquids

Customized probe configurations can also be provided.

HART® is a registered trademark of the HART Communications Foundation, Austin, Texas, USA.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 1

Safety Notes

Special attention must be paid to warnings and notes highlighted from the rest of the text by grey boxes.

WARNING: relates to a caution symbol on the product, and means

Introduction

Safety marking symbols

that failure to observe the necessary precautions can result in death, serious injury, and/or considerable material damage.

WARNING: means that failure to observe the necessary precautions can result in death, serious injury, and/or considerable material damage.

CAUTION: means that failure to observe the necessary precautions can result in considerable material damage.

Note: means important information about the product or that part of the operating

manual.

Alternating Current Direct Current

Earth (ground) Terminal

Protective Conductor Terminal

Frame or Chassis Terminal Cathodic protection resulting in a potential difference: for example,

between the ground on the instrument and the potential of the vessel or tank

The Manual

Notes:

• Please follow the installation and operating procedures for a quick, trouble-free installation and to ensure the maximum accuracy and reliability of your SITRANS LC 500.

• This manual applies to the SITRANS LC 500 only.

This manual will help you set up your SITRANS LC 500 for optimum performance. We always welcome suggestions and comments about manual content, design, and accessibility.

Please direct your comments to techpubs@siemens-milltronics.com library of Siemens Milltronics manuals, go to www.siemens-milltronics.com

Page 2 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

. For the complete

Abbreviations and Identifications

Short form Long Form Description Units

A/D Analog to Digital

Conformitè Europèene / Factory

CE / FM / CSA

D/A Digital to Analog DAC Digital Analog Converter DCS Distributed Control System control room apparatus ESD Electrostatic Discharge Ex Explosion Proof safety approval Exd Flame Proof safety approval FV Full Vacuum

HART

IS Intrinsically Safe safety approval LRV Lower Range Value value for 0 % 4 mA

LSL Lower Sensor Limit

µF micro Farads 10 µs micro Seconds 10

PED Pressure Equipment Directive safety approval pF pico Farads 10 ppm parts per million PV Primary Variable measured value

Stilling Well

SV Secondary Variable equivalent value

SVLRV

SVURV

TV Transmitter Variable URV Upper Range Value value for 100% 20 mA

USL Upper Sensor Limit

Mutual / Canadian Standards Association

Highway Addressable Remote Trans ducer

Grounded metal tube with openings

Secondary Variable Lower Range Value

Secondary Variable Upper Range Value

safety approval

below which no PV is anticipated

-6

-12

0% equivalent value

100% equivalent value

above which no PV is anticipated

Farad Seconds

Farad

Introduction

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 3

Technical Specifications: SITRANS LC 500

Power

Supply voltage

• maximum: 33 Vdc, (30 Vdc for IS)

• minimum 12 Vdc at 3.6 mA (9.5 Vdc at 22 mA)

Loop current 3.6 to 22 mA / 22 to 3.6 mA (2-wire current loop)

Environmental

Location indoor/outdoor

Altitude 2000 m max.

Specifications

Performance

Ambient temperature

• standard: –40

• ATEX-Explosion Proof –40 oC to 70 oC (–40 oF to 158oF) for T6

Relative humidity suitable for outdoor (Type 4X / NEMA 4X / IP 65

Installation category II

Pollution degree 4

Measurement range

• MSP-2002-2 0 to 3300 pF

Minimum span 3.3 pF

Measurement frequency 420 kHz @ Cx = 0 pF

Accuracy deviation <0.1% of actual measurement value

Non-linearity 0.1% full scale

Repeatability 0.1% actual measurement

Temperature stability 0.15 pF (0pF) or <0.25% (typically <0.1%) of actual

C to 85 oC (–40 oF to 185 oF)

–40 oC to 85 oC (–40 oF to 185 oF) for T5 to T1

enclosure)

measurement value, whichever is greater over the full temperature range of the transmitter

Page 4 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Safety • current signalling according to NAMUR NE 43;

3.6 to 22 mA / 22 to 3.6 mA

• probe input ESD protected to 55 kV

• inputs/outputs fully galvanically isolated

• polarity-insensitive current loop

• fully potted

• integrated safety barrier

Diagnostics (Includes • primary variable (PV) out of limits fault alarm) • system failure measurement circuit

• deviation between A/D and D/A converter values

•check sum

•watch dog

• self-checking facility

Outputs

• galvanically isolated

• damping range 1 to 10,000

Current loop

• continuous signal 4 to 20 mA / 20 to 4 mA

• 2-state functionality 4 or 20 mA / 20 or 4 mA, on or off

• time delay 1 to 100 sec. activating / de-activating

• adjustable hysteresis (on / off) 0 to 100%, min. 1% of range

Solid-state switch 40 Vdc / 28 Vac / 100 mA at 2 VA max.

• time delay 1 to 100 sec. activating / de-activating

• adjustable hysteresis (on / off) 0 to 100%, min. 1% of range

Specifications

User Interface

Local digital display 4 1/2 digit LCD

Rotary function switch for selecting programmable menu items

• 16 Positions 0 to 9, A to F

Push-buttons: RED (+), BLUE (–) used in conjunction with rotary switch, for

programming menu items

Communications

HART 1 Communication protocol

HART® is a registered trademark of the HART Communications Foundation.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 5

Electrodes

Specifications

Wetted Parts

Process connections

• threaded connection AISI 316 L stainless steel, 3/4”, 1”, 1-1/4”, 1-1/2”, 2”, NPT, BSPT, JIS

• flat-faced flanges AISI 316 L stainless steel (optional C 22.8 N, Monel Hastelloy2 C22, Duplex) ANSI, DIN

Probe diameter

• Cable: 9 mm (0.35”)

• Rod: 16 mm (0.63”) or 24 mm (0.95”)

Probe length

• Rod version: up to 3500 mm (138”) with 16 mm (0.63”) diameter probe up to 5500 mm (216”) with 24 mm (0.95”) diameter probe

• Cable version: 35 m (15 ft.)

Probe insulation PFA, Enamel

Probe insulation PFA / Enamel

Threaded connection AISI 316 L stainless steel

Flange AISI 316 L stainless steel or Teflon

covered

400,

Enclosure (electronic)

• construction aluminum, epoxy-coated; diameter 160 mm (6.3")

• cable entry 2 x 1/2” NPT

• ingress protection Type 4X / NEMA 4X / IP 65

Weight

Depends on configuration.

Example:

model: S-series rod: PFA insulated, 16 mm (0.63”) dia., 1 m (39.4”) insertion length weight: approx. 5 kg

Monel® is a registered trademark of the International Nickel Company.

Hastelloy® is a registered trademark of Haynes International Inc.

Please see

Only available as Rod version, max. length 1500 mm (59”), and only for use in applications where pH ≤ 7.

Teflon® is a registered trademark of Dupont.

Page 6 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Flange Standards

on page 90 for a table showing flange sizes.

Process Conditions

Pressure rating

• standard FV (full vacuum) to 200 bar (2920 psi)

• option up to 525 bar (7665 psi)

Temperature rating

• standard –200 °C to 200 °C (–328 °F to 392 °F)

• option up to 400 °C (752 °F)

Approvals

CE Complies with the requirements of E.C.C. as per EN 55011

and EN 61326

Dust Ignition Proof (DIP) ATEX II 3GD (EEx nA [ib] IIC T4...T6)

FM/CSA: Class I, Div. 2, Gr. A,B,C,D T4

Class II, Div. 1, Gr. E,F,G T4 Class III, Div. 1, Gr. E,F,G T4

Intrinsically Safe (IS) ATEX II 1 G (EEx ia IIC T4...T6)

FM/CSA: Class I, Div. 1, Gr. A,B,C,D T4

Flame-proof/ ATEX II 1/2 GD (EEx d [ia] IIC T6...T1) Explosion-proof enclosure FM/CSA: Class I, Div. 1, Gr. A,B,C,D T4

Sanitary 3A

Lloyds Register of Shipping Categories ENV1, ENV2, ENV3, ENV5

European Pressure, PED 97 / 23 / EC

Note: See

Appendix F: Approvals

on page 96 for details of certification.

Specifications

Please refer to page 18, Temperature/ Pressure Curve chart, for specific combinations of temperature and pressure.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 7

SITRANS LC 500: Transmitter

Operating Principles

Capacitance1 measurement operates by forming a variable capacitor resulting from the installation of a vertical measurement electrode in a vessel or silo. The tank wall usually forms the reference electrode of the capacitor. Whatever material is sandwiched between the two electrodes forms the dielectric. This will be composed of the vessel contents (air, vapor, liquid, solid, or a combination) and, if the measurement electrode is insulated, the insulating layer (PFA, for example). The dielectric gives a capacitance value that is proportional to level.

Capacitance is affected by the surface area of the electrodes, the separation distance between the electrodes, and the dielectric constant of the vessel contents. The dielectric constant is the measure of a material’s ability to store energy. The relative dielectric constant of air (vacuum) is 1: all other materials have a higher value.

Note: To preserve linearity of the measurement, both electrodes must be parallel.

(When the vessel contents are conductive, the measurement electrode is insulated and the interface between the insulating layer and the contents acts as a parallel reference electrode independent of the tank wall.)

The SITRANS LC 500 variable frequency oscillator

The SITRANS LC 500 probe is equipped with a variable frequency oscillator which responds to the capacitance: a change in capacitance is registered as a change in frequency. The relationship between capacitance and frequency is inverse, resulting in

Operation & Application

high resolution and accuracy. The variable frequency maintains a constant relationship to the reading.

Capacitance measurement in a cylindrical metal tank

In a cylindrical tank, it is possible to determine the initial capacitance in air by factoring in the length of the probe, diameter of the probe, diameter of the tank, and the relative dielectric constant of air.

For definitions relating to capacitance, see the glossary, page 109.

Page 8 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

The formula1 is:

K ε L××

--------------------------=

Log D d⁄()

where C = capacitance

K = constant

ε = dielectric constant

L = active measurement length D = diameter of tank d = probe diameter.

(For detailed application examples, see page 91.)

The transmitter measures the capacitance of the measurement electrode relative to the tank wall (reference electrode) and transforms it to a 4-20 mA signal. Any material that covers the probe will cause an increase in capacitance relative to an uncovered probe surrounded by air. As the product level rises the capacitance will increase.

Non-conductive or conductive contents

In practice, the SITRANS LC 500 probe is usually insulated. If the vessel contents are nonconductive, the dielectric is composed of the vessel contents and the insulation, and the separation distance is from the probe to the tank wall. The tank wall is the reference electrode, and it must be connected to the ground point on the instrument.

dielectric = contents plus insulation (non-conductive contents) dielectric = insulation (conductive contents)

Operation & Application

probe

dia. (d)

internal tank wall

internal tank diameter (D)

(insulation)

p ro b e

sleeve

Note: For simplicity, the probe is shown centrally mounted. If it is to be mounted off-

centre, take care to ensure the electrode remains parallel to the tank wall.

If the vessel contents are conductive, the electrode must be insulated. In this case the dielectric is the insulation layer and the interface between the conductive contents and the insulating sleeve acts as the reference electrode. This reduces the separation distance for the filled portion of the tank to the thickness of the insulation. It also creates a linear reference electrode independent of the tank wall.

This formula applies to a centrally mounted probe: for a probe mounted off-centre, the formula must be adjusted.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 9

In a non-conductive or irregular tank

Where the vessel contents are non-conductive:

• a reference electrode parallel to the measurement electrode is required

• the reference electrode must be grounded to the instrument

• a stilling well can form the reference electrode.

Where the vessel contents are conductive:

• the interface between the contents and the electrode insulation acts as the reference electrode

• a connection from the vessel contents to the instrument ground is required

• a stilling well can provide a means of connecting the contents to the instrument ground.

The stilling well

The stilling well is a metal tube concentric with the electrode, with vent openings to facilitate level equalization. Its diameter is somewhat larger than that of the electrode, depending on the application. The stilling well can either be integral to the SITRANS LC 500, or it may be part of the tank

The SITRANS LC 500 electrode

The SITRANS LC 500 electrode, comprising a measurement section and an active shield section, is the primary sensor of the system. It supplies the electrical capacitance value of the measurement section relative to the environment (tank wall or stilling well).

The SITRANS LC 500 patented Active-Shield Technology electrically isolates the measurement section and prevents any non-measurement capacitance from interfering with the measurement. (Capacitance changes could result from uncontrolled variations occurring in the connection cable, process connection, and non-active parts of the

Operation & Application

probe). This results in a better ratio of initial capacitance to total capacitance, resulting in higher accuracy.

The tank wall, or the stilling well if it is part of the tank, must be grounded.

Page 10 SITRANS LC 50 0 – INSTRUCTION MANUAL 7ML19985GE01

R = Ratio between initial

capacitance and total capacitance

Ca = Initial capacitance (air)

Cm = Capacitance Increase

(product)

C1 = Capacitance connection

point

C2 = Capacitance connection

cable

C3 = Capacitance Process

connection (includes active part)

Conventional Capacitance

Measurement

R = (C1 + C2 + C3) + Ca

(C1 + C2 + C3) + Ca + Cm

Measuring-

Circuit

SITRANS LC 500

with Active Shield

R = Ca

Ca + Cm

Measuring-

Circuit

The measurement is further protected from interference by a buffer, which applies the frequency signal from the measurement section to the active shield section. This effectively eliminates any electrical potential difference between the shield and the measurement section and prevents additional changes in capacitance occurring.

SITRANS LC 500

active shield

active measurement

empty

tank

full

tank

100%

section

probe seal

buffer

(inactive)

frequency (f)

≈ K

capacitance (C)

The relative lengths of the measurement section and active shield section can be specified to suit a particular application. If the measured range will be short relative to the total length of the electrode, specify a short measurement section. This increases the achievable resolution of the measurement, since any change in level will be greater relative to the length of the measurement section.

Operation & Application

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 11

The entire SITRANS LC 500 transmitter is potted in epoxy resin as part of the intrinsic safety protection. The potting also protects the electronics against mechanical vibration and moisture influences.

The transmitter is connected to the electrode by a mini coaxial cable, and grounded to a connection point inside the enclosure. The external ground lug on the enclosure provides a means of connecting the instrument system ground to a grounded tank or stilling well (For more detailed information on grounding requirements, please see Grounding Examples, page 28.)

–12

The measuring range of the SITRANS LC 500 is 3300 pF (1.0 pF ≅ 10

F).

Note: For safety purposes, and to ensure reliable measurement signals, the external

ground lug provided on the SITRANS LC 500 enclosure must be firmly connected by an adequate cable to the grounded vessel or stilling well

Application: SITRANS LC 500

The SITRANS LC 500 provides an analog and a solid-state output. The analog output can be either a continuous signal proportional to the reading, or in 2-state mode, a mA signal operating according to NAMUR recommendations for fault signalling

0% (LRV) and 100% (URV) can be set anywhere within the measurement range.

1. The loop current provides either: a. an analog signal:

• a reading proportional to level (PV) under normal conditions

• an out-of-limits display, ‘ooL’, alternating with PV, in fault conditions (if the process level exceeds the limit settings [USL] or [LSL])

or:

Operation & Application

b. in 2-state mode, provides a mA output:

• 4 mA or 20 mA output for 0% and 100%, under normal conditions

• a 3.6 or 22 mA output in fault conditions (when 2-state fault signalling [menu 08] is enabled, if the process level exceeds the limit settings [USL or LSL])

2. The solid-state output can be set to ‘contact open’ or ‘contact closed’, relative to a covered probe: it can be wired to an external relay and used to activate an external alarm or a pump via an auxiliary power circuit. It can be activated under normal conditions by the threshold settings, or Fault signalling can be enabled at menu 18.

Where the stilling well is welded to the tank.

See page 93 for detailed examples.

Page 12 SITRANS LC 50 0 – INSTRUCTION MANUAL 7ML19985GE01

solidstate switch output or 2-state mA output

Indicator - dynamic Primary Variable (units or % of range)

0-100%

current loop connection

Active Shield section

USL

URV = 100%

Upper Threshold Setting = % (activation hysteresis)

(deactivation hysteresis) Lower Threshold Setting = %

LRV = 0%

LSL

solidstate output

auxiliary power pump power

3. Upper Threshold Setting and Lower Threshold Setting activate and deactivate the 2-state output, and/or the solid-state output: the settings can be modified to adjust the hysteresis (the window within which the probe is considered ‘covered’).

4. The speed of response to activation and deactivation of the solid-state and/or 2-state output can be modified by Upper and/or Lower Threshold delays.

5. The PV reading can be stabilized if necessary by applying Damping.

6. Overfill or underfill protection can be set in the absence of those conditions by applying the Delta Range Setting.

7. Analog Fault Signalling (menu 08) and Digital Fault Signalling (menu 18) take precedence over the threshold settings (menus 07 and 17).

Level Measurement

The continuous 4-20 or 20-4 mA signal is proportional to the surface level of the product, with an accuracy of 0.1% of the actual measurement (for example, 1mm/m).

Typically, Lower Range Value (LRV - 0%) is set to 4 mA and Upper Range Value (URV 100%) is set to 20 mA: but the reverse is possible if required. The measurement takes place anywhere within that range. The LCD displays the value as mA, or pF, or percent, depending on the setting for the transmitter variable (TV). If you are using HART, you have the option to define the units.

Operation & Application

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 13

Interface Measurement

The capacitance of the electrode system is dependent on the dielectric constant of the product surrounding the probe. By comparing the capacitances resulting from different products with different dielectric constants, it is possible to determine which product is surrounding the probe.

For miscible products:

Contamination of one product by another can be measured:

100% product A 4 mA 100% product B 20 mA Values in between 4 and 20 mA represent the ratio of the two products.

For immiscible products:

The interface between two products can be detected by the change in capacitance from one to the other. (See example,

For Vessels filled with Oil

on page 91.)

Switch action

2-state Switch

The mA output can be used as a 2-state switch set to either 4 or 20 mA. It can be set to go to 4 mA if the probe is covered and 20 mA if the probe is uncovered, or the reverse.

Solid-state Switch

The solid-state output can be set to ‘contact open’ or ‘contact closed’ with a covered probe.

Adjustable hysteresis and time delay

Operation & Application

The adjustable hysteresis and time delay settings allow you to adjust the switch action for applications with a lot of surface movement.

Examples: With a moving surface that fluctuates between 79% and 80%, if the hysteresis is set so that 80 is on and 79 is off, the alarm will constantly alternate between on and off. Either set a time delay, or adjust the hysteresis:

• Set the time delay to 10 seconds (for example): the alarm will be on only after

the surface has been at 80% for at least 10 seconds.

• Reset the hysteresis for 70 (for example): the unit will ignore small surface

fluctuations between 79 and 80%.

Page 14 SITRANS LC 50 0 – INSTRUCTION MANUAL 7ML19985GE01

Fault Signalling

The SITRANS LC 500 has three fault signalling options:

• via the loop-current

• via HART

• via the solid-state output or solid-state relay.

Via the loop current

When using the mA signal, the SITRANS LC 500 operates according to NAMUR standards1 for fault signalling. The fault/failure signal can be triggered by a failure in the measuring system, such as:

• a checksum error

• a loss of signal caused by a defect in the module

• a short circuit in the sensor

• a process failure if the level exceeds the limit settings and if the unit is

programmed to detect this

You can set the Upper and Lower Sensor Limits (menus 0B and 0C) outside the Upper and Lower Range Value settings. In this case, if the process value is outside its nominal range (the span between LRV and URV), but still not at a fault/failure level, the continuous mA output will saturate to 3.8 mA or 20.5 mA. If the process value is outside the Upper or Lower Sensor Limits, this will be registered as a fault/failure.

Depending on the setting chosen for 2-state Fault Signalling (menu 08), the signal will go to either 3.6 mA (F: Lo) or to 22 mA (F:Hi). If you do not use communications to receive status information, we recommend enabling analog fault signalling (menu 08), in order to be warned if a fault or failure occurs. (This feature is disabled by default.)

Operation & Application

Via HART

See page 75 for by a response code. It is then up to the Host to decide what to do in the case of a fault situation. The Host may decide to issue Command 48, which returns more detailed information.

HART Response Code Information

. Each HART message is accompanied

Via the solid-state output

The solid-state switch can be wired up to an external relay, to provide a second level of protection. It can then be used to activate a failure alarm, or a level switch. (See page 93 for details of an application using SITRANS LC 500 as a level indicator, with the two-state output connected to a relay that activates a pump.)

See

NAMUR recommendation NE 43

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 15

on page 107 for more details.

SITRANS LC 500: Probe Configuration

The probe (electrode) comprises a measurement section and an active shield section. This electrode connects to the capacitance detector portion of the two-wire loop powered electronic transmitter. The transmitter module is mounted in a powder-coated aluminum enclosure which provides reliable operation in environments with dust, moisture, and high-frequency interference.

SITRANS LC 500 Electrode (Probe) Char acteristics

Apply to all general connection configurations:

• The standard SITRANS LC 500 insulated electrode is designed for use in both conducting and non-conducting liquid applications.

• Most electrodes consist of an active shield portion and a measurement portion, which combine to form the complete electrode. (This is not the case for cable electrodes or electrodes with ceramic/enamel insulation.)

• The sum of the active shield length and the measurement length is the total insertion length.

• The active shield design provides continuous immunity from changes in conditions at the top of the vessel where levels of vapors, dust, and condensation may be constantly changing.

• The design of the active shield isolates the starting capacitance of the electrode from the effects of changes in capacitance due to temperature and pressure fluctuations that could cause small changes in the seal geometry.

• The carefully-controlled diameter of the electrodes and insulation produces a linear output over a wide range of capacitance values (1 pF to 3300 pF).

• The end seal is formed as an integral part of the electrode insulation, giving smooth and uniform characteristics (tested to 55 kV).

• Standard single cone seal

active shield

Probe Configuration

insertion length

measure-

probe seal (inactive)

Page 16 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

ment portion

Electrode Assembly

SITRANS LC 500 electrodes come in a variety of formats to provide the necessary characteristics for correct mounting, chemical compatibility, temperature and pressure requirements, and dielectric constant of the medium. The main body of the manual discusses the standard configuration. Other options, with details, are shown in

SITRANS LC 500, alternate versions and application details

Process Connections

The standard threaded process connection (S-Series) with PFA insulated electrode, including the active shield, provides good results in all measurement situations within the temperature, pressure, and corrosive capabilities of the materials and seals. This remains true over a wide range of dielectric constants in both non-conducting and conducting materials.

Any standard process connection is available with the SITRANS LC 500, and special versions can be fabricated to match the mounting and application requirements. A wide range of threaded and flanged fittings is available. (Contact your local Siemens Milltronics representative for details, or check our website at: www.siemens-milltronics.com.)

Seal Types

The basic internal seal for the SITRANS LC 500 has a conical-shaped, preloaded pressure/leak resistant construction. Up to three levels of seal protection are implemented depending on the integrity requirements of the application. A single or double cone internal seal forms one or two barriers against leaking, and a third flange face gasket is also available in the D and DD seal construction. The flange face seal also provides a design with no metal wetted parts if required.

, page 83.

Appendix E:

Process Connection and Seal Configur ation of SITRANS LC 500

Process Connection Seal Type Seal Description

Threaded S Single Cone

Welded Flange S Single Cone

S Single Cone

D Single Cone + Teflon flange seal

Solid Machined Flange

SD Double Cone (used for stilling well applications)

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 17

Double Cone + Teflon flange seal. (Consult your local Siemens Milltronics representative.)

Probe Configuration

Pressure and Temperature Considerations

The maximum temperature and pressure of operation for the standard SITRANS LC 500 level probe is 200°C (392°F) and 200 bar (2900 psi). Please consult the pressure curve on page 18 for qualifications that must be applied to these maximums.

Enamel probes are recommended when the process temperature exceeds 200 °C, and/or in combination with very high pressure.

Note: Consult your Siemens Milltronics representative if the material to be measured may be incompatible with the SITRANS LC 500 materials of construction.

Temperature Versus Pressure Curve for SITRANS LC 500 PFA-insulated Level Probe

As the temperature approaches 75°C (167°F), the maximum pressure must be derated1. When the temperature reaches 200°C (392°F), the maximum pressure is limited to 50 bar (725 psi). This curve is typical for water only. For other, more aggressive chemicals the derating curve will be more severe.

–1bar (–

14.6 ps i)

pressure

(32

–100 (–148

C F)

200 bar (2920 psi)

150 bar (2190 psi)

100 bar (1460 psi)

70 bar (1022 psi)

50 bar (725 psi)

–50

(–58

consult factory when pressure or temperatures fall within this area

(158

(122

100 oC

(212

150

(302

temperature

200

(392

Reference Product: Water

Notes:

• For high temperature and pressure ratings for the Enamel probe, please contact your Siemens Milltronics representative.

Probe Configuration

• For FM / CSA Explosion Proof applications: if the process temperature exceeds 135

Decreased within the limits specified in the diagram (maximum 200 bar).

C (275 oF), select process seal type SD,DD,HP or HT.

Page 18 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Non-standard applications

Applications outside the standard capabilities of the S-Series require a different design configuration. These non-standard applications include:

Non-Standard Application SITRANS LC 500 Configuration

Non-metallic tanks with both conducting and non-conducting liquids.

Non-conducting liquids in spherical and horizontal-cylindrical tanks.

Highly corrosive materials requiring no metallic wetted parts.

Sanitary/food safe applications. Use SITRANS LC 500 sanitary version.

For more details on alternate configurations, see,

versions and application details on

Use stilling well for second electrode reference.

Use a stilling well as linearizer.

Use flange mount with D, DD seal version.

Appendix E: SITRANS LC 500, alternate

page 83.

Probe Configuration

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 19

SITRANS LC 500: Installation

Notes:

• Installation shall only be performed by qualified personnel and in accordance with local governing regulations.

• This product is susceptible to electrostatic discharge. Follow proper grounding procedures.

WARNINGS:

• Disconnect the device before any welding is carried out in the vicinity of the instrument.

• Provide protection when the solid-state switch is activating an external relay to prevent possible switch/relay damage resulting from inductive spikes generated by the relay coil. (See

state switch

on page 21 for details.)

Handling Electrodes

WARNINGS:

• Do not scratch or gouge the PFA electrode insulation since this could reduce the integrity of the insulation and the useful life of the electrode.

• Be careful with an enamel-insulated electrode

• Do not damage the insulation jacket on the electrode during shipping, packing, and installation proper performance.

• (ATEX 100): Precautions MUST be taken to avoid ignition due to hazardous electrostatic discharges:

a. Where an isolated probe is used in gas, vapor, or a non-

conductive liquid that is potentially explosive, requiring apparatus group IIC equipment.

b. Where the probe is used in a potentially explosive dusty

atmosphere.

. Any damage to the electrode can prevent

Protection for solid-

Normally the enamel insulation is protected by a stilling well, which is part of the design.

Most electrodes use PFA insulation, a very dense and reliable type of Teflon® that prevents leakage and corrosion of the metal electrode and acts as an insulator when conductive materials are being measured.

Installation

Page 20 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Mounting Instructions

The SITRANS LC 500 is easily installed: simply mount the instrument on the process connection of the vessel.

Notes:

• The transmitter is specified for use at temperatures ranging from –40 °C to 85 °C (–40 standard option is available with a thermal isolator.

• Before mounting the SITRANS LC 500, check to ensure the threads are matching to avoid damaging them.

Protection for solid-state switch

• for dc circuits: connect protection diodes in the correct polarity across the relay coil

• for ac circuits: connect a Voltage Dependent Resistor (VDR) or other ac compatible component (such as zeners and protection diodes in combination) in the correct polarity across the relay coil

Process Cautions

AUTION: Consider material surface

onfiguration when installing unit.

F to 185 oF): if your process temperature is outside this range, a

CAUTIONS:

• With a centrally mounted cable version, take care that the tensile load does not exceed probe or vessel rating

• With a cable version mounted close to the tank wall, take care that the product does not push the cable against the tank wall: a spring can be used as a retainer.

500 mm (20”) min.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 21

Installation

SITRANS LC 500: Standard Level Version

Available with the following features:

• Threaded flanges, welded flanges, and single-piece flanges

• S series, D series, SD series, DD series, and HP series process seals

• Selections of standard ANSI and DIN flanges

• The most common electrode is insulated with PFA. Enamel (HP seal) is also available (rigid design only).

• Various process connection materials

• Both Rod and Cable versions

Appendix E: SITRANS LC 500, alternate versions and application details

See onward, for details on dimensions, and for application examples.

, page 83

Installation

Page 22 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Interconnection: SITRANS LC 500

Wiring

Supply

Notes:

• The transmitter is powered by the current loop and needs at least 9.5-13 Volt on the terminals: 9.5 V at 22 mA or 12 V at 3.6 mA.

• The maximum supply is 33 Volt. If the voltage is higher the device will shut down.

• The loop-circuit will withstand voltages up to 250 Vac/Vdc without any damage.

The SITRANS LC 500 uses a switched power supply circuit, which makes the most efficient use of the available power present on the terminals. If the signal current is low, (4mA), the terminal voltage will be high, and if the signal current is high, (20 mA), the terminal voltage may be low, due to all the resistive elements in the loop, such as the barrier and sense resistor.

Voltage drop versus mA for current transmitter operation

voltage drop over 250 ohm measuring resistance

voltage drop over 280 ohm in barrier

V-s uppl y

voltage drop over blocking diode in barrier

margin or voltage drop over instrument cable

operation voltage, transmitter

Interconnection

Examples:

• With a 250 Ohm sensing resistor, no barrier and negligible cable resistance, the overall supply voltage should be at least 15.0 V.

• With a 250 Ohm sensing resistor, a barrier of 280 Ohm, and 20 Ohm cable resistance (500 m), the total resistance is 550 Ohm, so the overall supply voltage should be at least 20.5 Volts.

• For a multi-drop application, where the measuring supply is fixed to 4 mA, the voltage on the terminals of the SITRANS LC 500 should be at least 12 Volts.

The loop circuit is completely isolated from the measurement circuit. It is designed so that the internal capacitance and inductance on the terminals are isolated and do not factor in safety calculations.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 23

Cable

Notes:

• To maintain reliable transfer of the HART modem signals, the RC1 time constant of the connections should be less than 65 µSec.

• Cable capacitance must also be considered when selecting cable for intrinsically safe installations.

Interconnection

• For output signals (from the SITRANS LC 500), only the cable and barrier resistance are relevant. For input signals the measurement resistance is also relevant.

• Use twisted pair cable, screened as a pair.

RC = Resistance * Capacitance

Or, if you use a common screen over a cable containing multiple twisted pairs, do not use other pairs for signals that could interfere with HART signals.

Selecting the correct instrumentation cable

• you need to know the cable length, the barrier type (if applicable), and the measurement resistance

• select a cable that will give you a capacitance time constant of less than 65 µSec

1. Calculate the capacitance for a time constant of 65 µSec, using the following formula:

tRC×=

is the sum of the load resistor and cable resistance.

is the sum of the cable capacitance and the capacitances of the connected

device/devices.

2. Determine the cable length allowed, by subtracting the capacitance value of the device (or devices) on the loop from the total capacitance, and using the maximum allowable limit of 100 pF per meter (or 1 nF per 10 meters).

Example

1. Calculate the cable capacitance which will give a time constant of 65 µSec: A twisted pair cable with a conductor cross-section of 1 mm a copper resistance of 73.6 Ohm/km and a capacitance of 100 pF/m (or 1 nF/10m).

For a standard 28 V 280 Ohm barrier and a 250 Ohm measuring resistance, with a 100 meter cable:

Resistance = 280 (barrier) + 250 (sensing device) + 7.36 (cable)= 537.36

(time constant = Resistance * Capacitance)

tRC×=

(AWG 18 equivalent) has

CtR⁄=

65 10

C 65 10

Page 24 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

6–

× 537.36 C×

s = nF

6–

× 537.36⁄()121==

2. Calculate the length of cable allowed, by subtracting the capacitance value that the device presents on the loop from the total capacitance. SITRANS LC 500 has no measurable capacitance value, but assume 5 nF. Then use the maximum capacitance limit (1 m /10 nF) to determine the cable length.

121 5 116=–

116 10 1160=×

IS applications: maximum cable length

In an IS application, the IS side of the barrier allows for only 70 nF.

Example:

Subtract the capacitance for the device:

Interconnection

70 5 65=–

65 10× 650=

This allows for a maximum 650 meters on the IS side.

On the other side of the barrier:

121 65 56=–

which allows for 560 meters on that side.

Note: The resistance of this length, 650 + 560 meters, could reach 145 Ohm (at

120 Ohm / km), which is too much. In this case, use a thicker cable with lower resistance.

IIB type/class hazardous area applications: maximum cable length

In IIB type/class hazardous area applications the maximum allowed capacitance value is 330 nF, as long as you are not using HART. If you are using HART, the maximum cable length will be limited. Depending on cable specifications, the maximum length lies between 1 and 3 km.

Multi-drop applications: maximum cable length

In a multi-drop application, the total capacitance of all the devices must be calculated. With five devices, at 5 * 5 nF, the allowable cable length will be considerably limited.

Notes:

• If the device is part of a multi-drop setup, the SITRANS LC 500 sets the current to 4 mA, which inhibits analog signalling, including fault signalling.

• Multi-drop is a HART mode where devices are set to a fixed current, and the device is interrogated periodically. The maximum number of devices on one loop is 15, one of which can be an analog mode device.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 25

Terminals

The SITRANS LC 500 is equipped with two terminal blocks, both insensitive to polarity.

One terminal block is intended for connecting the instrument cable (loop power).

The other terminal block provides the solid-state switch output.

Interconnection

Connecting SITRANS LC 500

The processor integrated circuit is covered by a label which contains product information and which also acts as a protective seal against moisture.

WARNING: Damage or removal of the protective label voids the warranty for the SITRANSLC 500.

1. Loosen the retaining set-screw and remove the enclosure cover.

2. Loosen the cable gland and thread the cable through it.

3. Connect the power / signal conductor wires to the current loop terminal block (any polarity).

4. Ground the enclosure: (see instructions on next page for details).

5. Check to ensure all connections are good.

6. Tighten the cable gland to form a good seal.

7. Replace the enclosure cover and tighten the retaining set-screw.

Note: If you plan to calibrate the unit using push-button adjustment, do so before

replacing the cover.

Connection Diagram

ground lug

protective label (see warning above)

solid-state switch relay (any polarity)

instrument

system ground

measuring signal

(mini-coaxial cable)

ground connection point for instrument system

Type: Ser.: Date: Rev.:

Tamperingvoids warranty

Page 26 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

4-20 mA currentloop connection (any polarity)

Protection for solid-state switch

• For dc circuits: connect protection diodes in the the correct polarity across the relay coil.

• For ac circuits: connect a Voltage Dependent Resistor (VDR) or other ac compatible component (such as zeners and protection diodes in combination) in the correct polarity across the relay coil.

Grounding instructions

Notes:

• Since the measurement occurs between the Measurement and Ground connections, it is important to have good, low-resistance, reliable connections in this circuit.

• Use a ground connection wire with a sufficiently large diameter relative to its length, and not less than 1 mm

• The SITRANS LC 500 measurement circuit is completely isolated from the loop circuitry: this allows either line of the loop circuit to be grounded if requirements for Ex safety are followed and if the power supply voltage is less than 33 Vdc.

Connect the housing and the process connection with either the stilling well1 and/or tank wall, using the ground lug on the housing.

label / protective seal

(DO NOT REMOVE)

ground lug

Interconnection

instrument system ground

(connected at factory)

Type: Ser.: Date: Rev.:

Tamperingvoids warranty

instrument system

ground connection point

WARNING: When connecting the probe, do not leave moisture or metal scrap (from the cable shielding, for example) inside the housing. This c ould interfere with transmitter operation, or cause a short circuit.

Where the stilling well is welded to the tank.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 27

Grounding Examples: SITRANS LC 500

Grounding is important for two reasons:

1. To prevent interference to the signal: system grounding

2. For safety purposes: safety grounding

Several common applications are illustrated. They are separated into two groups: the first

Interconnection

group illustrates System Grounding and the second illustrates Safety Grounding.

System Grounding (referencing)

For the measuring system to function correctly, the reference electrode must be properly grounded. Make sure that there is a reliable connection from the instrument housing to the reference electrode (usually a metal tank). Some common applications involving system grounding include:

• metal tanks

• metal tanks, cathodically protected

• non-conductive tanks

Metal Tanks

If the metal tank is reliably grounded, connect the ground lug on the SITRANS LC 500 to the earth ground on the tank as shown.

(See page 26 for connection diagram.)

ground lug

metal

Page 28 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Cathodicall

ground lug

Protected Metal Tanks

Cathodically protected metal tanks are never directly grounded. However, the impedance of the supply source is so low that it will not cause any problems. The shielding of the loop cable should be grounded at one end only (the tank end) to avoid short-circuiting the cathode protection voltage.

The ground lug on the SITRANS LC 500 can be connected to the tank as shown.

(See page 27 for further grounding details.)

metal

optional stilling

well

Note: Grounding the SITRANS LC 500 as illustrated above provides only system

grounding for referencing purposes: it does not provide safety grounding.

Non-Conductive Tanks

ground lug

Interconnection

Non-metallic tanks always require a stilling well or proper grounded conductive medium.

Connect the ground lug on the SITRANSLC500 to earth ground. If the stilling well is integral to the SITRANS LC 500, it is now grounded.

If the vessel has a stilling well provided, make sure that the metal parts of the stilling well are properly grounded.

stilling well

nonmetallic

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 29

Safety Grounding

The safety grounding requirements are determined by the application and the connected instruments. The SITRANS LC 500 transmitter does not have any special requirements due to the galvanic separation between the measurement section and the loop section.

Depending on the DCS characteristics, there are three possible grounding options:

• If the DCS measures the current through the loop compared to a common zero Volt

Interconnection

Example 1

point, do not ground the negative side of the current loop because measurement inputs can be short-circuited.

• If the DCS measures the current in the positive wire or connector, the negative side of the current loop can be grounded.

• If the DCS has galvanically separated inputs for each measurement channel the grounding method can be chosen as required.

In hazardous applications a Stahl-type barrier is required, and it is typically mounted on a DIN rail inside a customer-supplied enclosure located in the non-hazardous area.

If no specific Ex conditions apply, the SITRANS LC 500 can be directly connected to the DCS. The supply voltage, however, should remain within the limits set by the SITRANS LC 500. Connecting a SITRANS LC 500 to a DCS does not influence that equipment. One of the connection cables can be grounded if desired.

Type: Ser.: Date: Rev.:

Tamperingvoidswarranty

3,6 - 22 mA

13 < Vsupp < 32 Vdc.

DCS APPARATUS

GND

COAX

Example 2

In the case of Intrinsically Safe applications, where the DCS equipment measures the current in the positive connection and the negative connection can be grounded, a barrier type as shown below is sufficient.

hazardous area

Type:

COAX

GND

Ser.: Date: Rev.:

Tamperingvoidswarranty

Page 30 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

non-hazardous area

Stahl barrier: 9002/01-280-

110-00 (or equal)

277

110 mA

28V

DCS APPARATUS

Rmeas

Example 3

If you do not want to ground the negative connection directly, or in the case of Intrinsically Safe applications where the DCS measures the current in the negative connection, and that wire cannot be grounded, a barrier type is required as shown below.

hazardous area

Type: Ser.: Date: Rev.:

Tamperingvoidswarranty

Stahl barrier: 90 02/13-280-

non-hazardous area

110-00 (or equal)

110 mA

277

28V

DCS APPARATUS

Rmeas

Example 4

In Intrinsically Safe applications where the DCS has galvanically separated inputs, you can use either the type of barrier shown below, or the type shown in Example 2.

hazardous area

Type: Ser.: Date: Rev.:

Tamperingvoidswarranty

When Ex applications are using an Ex approved Intrinsically Safe (I.S.) power supply unit, no barrier is required and grounding is optional.

non-hazardous area

Stahl barrier: 9002/01-280-

110-00 (or equal)

280

160 mA

ISS Ground

DCS APPARATUS

Interconnection

I.S.

Type: Ser.: Date: Rev.:

Tamperingvoidswarranty

DCS APPARATUS

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 31

Communications

The SITRANS LC 500 is equipped with HART communication1protocol2so that settings and values can be obtained and altered locally

Typical PLC configuration with HART

Interconnection

SITRANS LC 500

Diagnostics

power supply

or remotely.

R2= 250 Ω

PC/laptop with Simatic PDM or HART communicator

The internal diagnostic functions continuously monitor the operation of the transmitter. An error signal is generated if a failure or irregularity occurs.

The SITRANS LC 500 sends the signal current according to the NAMUR NE 43 recommendation. During normal operation the current remains within the range from 3.8 to 20.5 mA. If the process exceeds its normal limits but is not in a fault or failure situation, the signal current will be outside the measurement range (4 to 20 mA) but will be limited to either 3.8 or 20.5 mA.

If a fault or a failure is detected, the signal current is set to either 3.6 mA or 22 mA, depending on the settings you have chosen. (This feature may be disabled by the user.)

Depending on the system design, the power supply may be separate from the PLC, or it may be part of the PLC.

A 250 Ohm resistor is required only when the PLC is connected to a HART modem or a HART communicator.

The HART communicator and a PCL/laptop computer cannot both be connected to the 4-20 mA loop simultaneously.

Page 32 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Current values used as signals from digital transmitters

Current values for signal detection

Measurement value

Fault- mA Value (F)

Interconnection

Fault- mA Value (F)

F = 1

3.6

4.0

3.8

F = 0

20.5

F = 1

Whenever the local situation allows, the zero adjustment and the full scale can be set using the push-button feature and the appropriate menu selection. In most cases it is possible to do a one point calibration

by using the push-buttons to input the actual level

in %.

The total isolation between the measurement circuit and the current- loop circuit provides immunity during the use of cathode protected measuring tanks. Connection to PLC equipment is possible without any difficulty.

• The Upper Range Value (URV) and Lower Range Value (LRV) should be within

the USL to LSL range, but can be set anywhere within that range.

• An interruption of the measuring connection will be detected: a loose or

interrupted connection results in up to 0.5 pF capacitance, which is below the adjusted LSL and thus signals a FAULT condition.

Applications for Solid-state Output

The solid-state output is a polarity independent switch output. The solid-state switch has two possible functions.

• it can be activated/deactivated when the product level reaches the upper/

lower threshold settings (set in menus 15 and 16)

• or it can be activated if a fault or failure is detected

(set in menu 18)

See page 93 for an illustration of a typical application using SITRANS LC 500 as a level indicator, with the solid-state output connected to a relay which activates a pump.

The solid-state switch has its own parameter set: menu items 13 to18, (see

00 to 0F and 10 to 1F

on page 37, and

Rotary Switch Positions – Quick Reference

Menu Levels

chart on

page 41).

In menu 0E and menu 0F, you set the Upper and Lower Range Values (URV and LRV) for relay operation. Within that range, the solid-state switch has independent settings for

See

Calibration using push-button adjustment

See

Fault Signalling

on page 15 for details of fault conditions.

on page 43.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 33

Upper and Lower Threshold, (menus 13 and 14) and the accompanied delays (menus 15 and 16).

Initially the solid-state output is disabled for both signal output and fault/failure output (menu 17). When the solid-state switch is to be operated as fault/failure output (for example, for a separate shutdown system), we recommend disabling the operation for signal output (select Disabled Mode in menu 17 on page 70). There is no delay in the operation for fault/failure output.

Interconnection

Notes:

• The solid-state output should only be used in circuits where the current is limited by a proper load.

• Due to the limited switching capabilities of the solid-state switch component, an auxiliary relay must be applied when switching high-current/high-voltage apparatus.

Switch Protection (Diode)

WARNING: When the solid-state switch is activating an external relay, protection diodes must be connected in the correct polarity across the relay coil to prevent possible switch/relay damage resulting from inductive spikes generated by the relay coil.

Factory Settings

The SITRANS LC 500 has a number of default factory settings. If the required settings for the application are known, the settings can be modified during final testing.

Note: To restore factory settings, use menu item 12 (see

for details).

Factory Settings

on page 72

Settings:

Setting Description

ID Has a unique serial number TV0 Units PF TV0 UL 3300 pF [switch position (0)C] TV0 LL 1.666 pF [switch position (0)B] TV0 URV 3300 pF [switch Position (0)F] TV0 LRV 0.00 pF [switch Position (0)E] AO1 4-20 mA is 0-100% [position (0)8] TAG "customer input data via HART" DESCRIPTOR "customer input data via HART" MESSAGE "Siemens Milltronics P I"

Page 34 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Setting Description

DATE "customer input data via HART" SENSOR SERIAL NUMBER "customer input data via HART" FINAL ASSEMBLY NUMBER "customer input data via HART" TV1 Units UNDEFINED TV1 LRV 0 [switch position (0)E, TV1] TV! URV 1.0 [switch position (0)F, TV1]

• The Upper Sensor Limit (USL) and Lower Sensor Limit (LSL) are set to 3300 and

1.666 pF respectively, and the following conditions apply: the Upper Range Value (URV) and Lower Range Value (LRV) should be within the USL to LSL range, but can be set anywhere within that range.

• An interruption of the measuring connection will be detected: a loose or interrupted connection results in up to 0.5 pF capacitance, which is below the adjusted LSL and thus signals a FAULT condition.

Interconnection

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 35

The SITRANS LC 500 User Interface

The SITRANS LC 500 user interface consists of the display (LCD), the rotary switch, and two push-buttons. The rotary switch enables you to select a particular item and/or variable for read-out and/or adjustment: the push-buttons allow you to select and/or alter a read-out or a value.

User Interface

rotary switch

menu selector

RED (+) push-button

increment value

BLUE (–) push-button

decrement value

Type: Ser.:

Date: Rev.:

Tamperingvoids warranty

LCD

label (protective seal)

solid-state switch relay (any polarity)

current-loop connection (any polarity)

coaxial connector

probe connection

measurement connection

earth TAB tank / vessel frame

The LCD (display)

The seven-segment LCD (display) shows the value and/or diagnostic information. It is mainly for numeric data, but there are also a number of indicators which use alphabetic characters. A list of these LCD displays, together with the associated menu items, is shown in

Appendix B: LCD display examples

left-most colon: indicates value accepted (debounce time passed)

left-most decimal point/heartbeat indicator (flashes twice per second)

left-arrow indicates Menu Level 10 to 1F

The LCD will hold information for a long time even when not refreshed (for example, if there is a loss of power). The heartbeat indicator blinks continuously whenever the device is working. A still heartbeat signals that the device has stopped working.

on page 74.

value MINUS sign (– )

Page 36 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

How to access the data:

Access data in the transmitter from 28 menu items divided between two menu levels: 00 to 0F and 10 to 1F. Use the rotary switch and push-buttons in combination to select an item and adjust the value.

The functions of each menu item are illustrated in application examples on page 93 to 94. Details on using each menu item are given in

Rotary Switch Positions – Quick Reference

also

Appendix A: Menu Groups

on page 41 showing the switch position

and button press combinations used to carry out different functions.)

Menu Levels 00 to 0F and 10 to 1F

on page 54. (See

Menu 00 to 0F Description Menu Group Details

09 Stepsize Update Value 0A Damping page 56 0B Lower Sensor Limit page 56 0C Upper Sensor Limit page 57 0D Delta Range Setting page 57 0E Lower Range Value page 58 0F Upper Range Value page 59 00 Dynamic Value (PV) 02 Max./Min. Recorded Value page 60 01 Transmitter Variable select for PV page 60 03 Upper Threshold Delay: 2-state mode 04 Lower Threshold Delay: 2-state mode page 62 05 Upper Threshold Setting: 2-state mode page 63 06 Lower Threshold Setting: 2-state mode page64 07 Analog Signalling Mode page 64 08 Analog Fault Signalling page 66

Tra nsmi tter Variable Settings

Tra nsmi tter Variable Value

Analog Output Signalling (loop-current)

page 55

page 59

page 62

Menu 10 to 1F Description Menu Group Details

10 Dynamic Value (PV) 1C Transmitter Variables Dynamic Value page 61 13 Upper Threshold Delay: solid-state output 14 Lower Threshold Delay: solid-state output page 68 15 Upper Threshold Setting: solid-state output page 68 16 Lower Threshold Setting: solid-state output page 69 17 Digital Signalling Mode page 70 18 Digital Fault Signalling page 71 11 Output Signal Processing Test 12 Factory Settings page 72 19 Range Inversion page 73 1F Keylock Level page 73 1A 1B 1D 1E

Non-operational Spare

Tra nsmi tter Variable Values

Digital Output Signalling

Miscellaneous

page 59

page 67

page 72

User Interface

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 37

The rotary switch

The rotary switch gives you access first to the menu level and then to the menu item.

The rotary switch has a small slot where the current position can be read. The positions are read clockwise, and in increasing order:

The push-buttons

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. The position wraps from F

to 0.

The switch can be turned in either direction. When it is turned to a

new position, the LCD displays the new menu selection for 1

second, followed by the data for that position.

Certain menu selections return more than one piece of information per item: in that case the display alternates between the two values, for example, PV Value / Fault status.

User Interface

The push-buttons allow you to change the value of a menu item. Use the RED (+) button to adjust a value up; the BLUE (–) button to adjust a value down; or press both simultaneously for special applications. For a table showing the combinations of rotary switch positions and button presses used to carry out different functions, see page 41.

Access to a menu item:

Notes:

• For a detailed description of each menu item, see Appendix A, page 54: the functions of each menu item are illustrated in application examples on page 93 to 94.

• Change over from Menu LEVEL 0 to Menu LEVEL 1 is only possible at position 0, from menu item 00 to 10 or vice-versa. (See page 42 for detailed instructions.)

1. First select Menu LEVEL 0 or Menu LEVEL 1.

2. Turn the rotary switch to the number of the desired item.

Adjusting the value

Notes:

• The push buttons are preset with a delay called the debounce time.

• Keeping one or both buttons pressed continuously will trigger an auto-repeat in some menus.

1. Select a menu item.

2. Press the RED (+) or BLUE (–) push button to adjust the value up or down: acceptance is indicated when the left-most colon on the LCD appears. (You have to press longer than the debounce time to have the action accepted: the debounce time varies according to the menu item selected.)

Page 38 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Transmitter Variables

• Transmitter Variable 0 (TV0) is the capacitance as measured by the device.

• Transmitter Variable 1 (TV1) is a computed variable: the dynamic value is a computed derivative from the range settings for TV0.

Transmitte r Variable User-defined Functions Units

TV0 TV1 Can be user-defined

URV, LRV, Damping, USL and LSL

User Interface

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 39

Start-up: SITRANS LC 500

Capacitance measurement systems require the instrument to be calibrated for a particular application. Two methods of calibration are available:

• push-button (for instructions, see page 43).

• HART (for instructions, see page 46).

Quick Start

We strongly recommend you read the full manual to use your device to its fullest potential. However, if it is possible to adjust the level of the tank to the 0% and 100% levels, you can use the quick start sequence below to calibrate the instrument and get started.

Notes:

• Change over from Menu LEVEL 0 to Menu LEVEL 1 is only possible at position 0, from menu item 00 to 10 or vice-versa. (See page 42 for detailed instructions.)

• For a table showing all the combinations of rotary switch positions and button presses used to carry out different functions, see page 41.

• For a detailed description of each menu item, see Appendix A, page 54.

Quick Start Sequence

1 Calibrate the 0% setting (LRV - lower range value): menu 0E

Start Up

2 Calibrate the 100% setting (URV - upper range value): menu 0F

3 View primary variable (PV): menu 00

4 The SITRANS LC 500 is now ready to operate.

For instruments without a stilling well, the 0% setting needs to be calibrated after the device is installed, and with the tank/vessel empty. Calibration is also sometimes necessary after installing a SITRANS LC 500 fitted with a stilling well, although in most cases

the 0% setting is calibrated at the factory. Set value for 0% (LRV): units must be pF (Menu 01 must read Pv = 0). a Bring the product level to the height that corresponds to 0%. b Turn the rotary switch to E (Empty). c Press both buttons and hold for about 1 second: the 0% point is now set.

Set value for 0% (LRV): units must be pF (Menu 01 must read Pv = 0). a Raise the product level to the height that corresponds to 100%. b Turn the rotary switch to F (Full). c Press both buttons and hold for about 1 second: the 100% point is now set.

Turn the rotary switch to 0. The LCD displays the actual pF reading.

Page 40 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

URV Value

Increase

for 20 mA

URV

URV =

Decrease

Actual

Val ue (P V)

Level

Keylock

Level

Keylock

Increase

Level

Keylock

Decrease

—

Spare

—

Spare

Var 0

Transmitter

—

Spare

—

Spare

MODE

Normal /

Fault signal

(Solid-state

Status

Solid-st ate

Var 1

Read-Out

Inverse

Output)

Output

Read-Out

Transmitter

MODE

Inverse

Normal /

Set FAULT =

Solid-state ON

Set Covered =

Solid-st ate ON

Var 2

Normal /

Var 3

Read-Out

Transmitter

Mode

Tog g le

Inverse

Operating

Disable Fault

for Solid-state

Solid-st ate OFF

for Solid-state

Disable Switch

Solid-state OFF

Menu LEVEL 1 (10 to 1F)

Switch

old Point

Lower Thresh-

Increase

tion Transistor

old De-Activa-

old Point

Decrease

Threshol d

Point to 25%

Preset Lower

Lower Thresh-

PV Units PV Units PV Units PV Units PV Units

Numeri-

cal

LRV Value

Delta Val ue

UPPER limit

LOWER limit

Val ue

Dampin g

Step

Actual

Fault signal

Loop Current

for 4 mA

for 4 c.q.

Size

22 or 3.6 mA

in mA

20 mA

Increase

Dampin g

Increase

Step Size

Set FAULT:

Set Covered:

LRV

Delta

UPPER limit

LOWER limit

Val ue

to 10000

20 mA (Hi)

LRV

Decreas e

Decrease

Decreas e

Dampin g

Decreas e

Step Size

Decrease

22 mA

Set FAULT:

Set Covered:

Value (PV)

LRV = Actual

Delta

= Min.

URV– LRV

Limit to

3.6 mA

Preset Upper

Set to 1 Set to 1 Preset

Fault signal

Set Analog

Actual (PV)

Lower Limit to

Disable

Range

4 to 20 mA (Anl)

UPPER limit

LOWER limit

Val ue

to 0.01

4 mA (Lo)

Menu LEVEL 0 (00 to OF)

old

De-Activation

Current signal

Lower Thresh-

Poi nt

Lower

Increase

Threshol d

old Point

Decrease

Lower Thresh-

Preset Lower

Threshol d

Point to 25%

01 2 3 4 5 6 7 8 9AB C D E F

Rotary Switch Positions – Quick Reference

old

Upper Thresh-

Time Dela y

De-Activation

Activation

Time Dela y

Lowest

Highest/

PV Units Seconds Seconds % % mA mA

Show

select PV

Selection

PV Value

PV Units Num.

Units

NO KEYS

Upper

Increase

Activati on

Current signal

Current sig-

variable

Value

Threshol d

Current signal

Increase

Delay Time

nal

Increase

Delay Time

Highest

Memory

Read-out

PV Memory

TVmax

Step TV0 to

Set

Fault

Level

read-out

Up Key-

RED (+)

old

Poin t

00 to 0F

Poin t

Decreas e

Upper Thresh-

Decreas e

Decrease

Lowest

PV Memory

to TV0

Step TVmax

Set

Down

Threshol d

Point to 75%

Preset Upper

Tog g le

Delay Time

00 < – > 10 0

Tog g le

Delay Time

00 < – > 10 0

Read-out

Level

Key-

BLUE (–)

actual PV

Reset Hi/Lo

memories to

Se t

% Mode

Level

Show-

10 to 1F

Both

Keys

Default * TVO * 00 00 75% 25% Analog Disabled 1.0 1 1.666 pF 3300 pF 3300 pF 0 pF 3300 pF

Seconds Seconds % % O/ C O/C nor / inv Resp. Units Keylock

Factory

Settings

Numerical

PV Units

Units

Switch

old Point

RED (+)

old Point

Decreas e

Delay Time

Decrease

Delay Time

FAC

tings)

00 to 0F

Set Men u

Down

Threshol d

Point to 75%

Preset Upper

Upper Thresh-

Time

Delay Time

00 < - > 10 0

Toggle Delay

Time

Delay Time

00 < - > 10 0

do it Toggle Delay

tings)

(factory set-

tus

Invert Sig-

nalling Sta-

Level

Key-

Level

Show

10 to 1F

BLUE (–)

Both

Keys

Default * * * 00 00 75% 25% Disabled Disabled nor * * * * * 0

Upper Thresh-

Time Delay

De-Activation

Activation

Time Delay

FAC

(factory set-

check

Display

PV Value

NO KEYS

Upper Thresh-

Switch)

Increase

Transistor

Switch

Increase

Transistor

FAC

tings)

(factory set-

Fault code

Level

Fault

Set Men u

Value

read-out

Up Key-

Increase

Transistor

old Activation

Menu levels 0 and 1

Menu level 00 to 0F is the default start-up setting after power is applied or after a reset. Menu Level 10 through 1F is flagged in the LCD by an left-arrow indicator in the upper left corner of the LCD.

To change from menu 00 to menu 10:

1. Set the rotary switch to 0.

2. Press and hold the BLUE (–) button.

3. While the button is pressed, the display shows : M 10 followed by : SEL 1, indicating that the current menu level is now 10 to 1F: a left-arrow is displayed in the top left corner of the LCD.

4. When the button is released, the LCD displays PV (primary variable): the leftarrow remains visible.

To change from menu 10 to menu 00 :

1. Make sure the rotary switch is set to 0.

2. Press and hold the RED (+) button.

3. While the button is pressed, the display shows: M 00 followed by : SEL 0, indicating that the current menu level is 00 to 0F: no left-arrow is displayed in the top left corner of the LCD.

4. When the button is released, the LCD displays PV.

In menu 00 or 10, to see the current menu level selection, briefly press one of the buttons (less than a second): the current selection is momentarily displayed.

Notes:

Start Up

• Check the menu level when using the rotary switch to select a menu item: the leftarrow in the top left corner of the LCD indicates menu level 1.

• The rotary switch must be set to 0, in order to change from one menu to the other.

• Hold the RED (+) or BLUE(–) buttons for longer than the preset delay, or debounce time, when altering a value: the debounce time is generally about a second, but varies from one menu item to another.

• Keylock level (menu 1F) must be set to 0 (no restrictions) to enable you to change settings.

Start up using push-button calibration: (overview)

• Check that Keylock level is set to enable calibration

• If required, change the transmitter variable: select units as pF, units user-defined, or values as percent

• Calibrate value for 0%

• Calibrate value for 100%

• Set display for dynamic PV (primary variable): select values displayed as percent or units

• SITRANS LC 500 is ready to operate

Page 42 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Calibration using push-button adjustment

Notes:

• To toggle between menu level 0 and menu level 1, set rotary switch to 0, and use RED (+) or BLUE (–) push-button to select menu.

• To reset values to factory settings, select menu 12. Press and hold both buttons: the LCD displays do it, followed by FAC A when the buttons are released.

• For a complete list of menu items, see

Appendix A: Menu Groups

Reset keylock level if necessary to enable settings to be changed: menu 1F

(no change is necessary if the factory setting has not been changed)

1. Select menu 10, then set the rotary switch to F.

2. Use the BLUE (–) push-button to decrease the value to 0: display reads PL 0 (no restrictions).

Reset selection for transmitter variable if necessary to TV0 (units are pF): menu 01

(no change is necessary if the factory setting has not been changed)

1. Select menu 00, then turn the rotary switch to 1.

2. Use the BLUE (–) button to adjust the value to 0: the display reads Pv = 0.

Calibrate the 0% setting (LRV - lower range value): menu 0E

1. Set value for 0% (LRV): units must be pF (Menu 01 must read Pv = 0) a. Bring the product level to the height that corresponds to 0%.

b. Set the rotary switch to E (Empty). c. Press both buttons and hold for about 1 second: the 0% point is now set.

, page 54.

Start Up

Calibrate the 100% setting (URV - upper range value): menu 0F

• method 1: if it is possible to bring the actual product level to 100%

• method 2: if the current product level is known, you can calculate the

percentage value, and calibrate for full scale in %. The closer the actual level is to 100%, the more accurate this result will be.

Method 1. Set value for 100% (URV): units must be pF, (at Menu 01, Pv = 0)

a. Raise the product level to the height that corresponds to 100% b. Set the rotary switch to F (Full). c. Press both buttons and hold for about 1 second: the 100% point is now set.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 43

Start Up

Method 2. Set value for 100% (URV): values must be displayed as percent (at menu 01,

Pv = P)

a. Calculate the percentage value of the current level. b. Set rotary switch to 1, and press both buttons to adjust the value to P. c. Set the rotary switch to F (Full). d. Press the RED (+) or BLUE (–) button to increase or decrease the reading on the

LCD until it matches the known (actual) percentage. The push-buttons appear to work in reverse for this function

. You may need to decrease the stepsize value

(menu 09) in order to reach the desired value.

e. 100% value is set.

Example: Set LRV in capacitance mode, then set menu 01 to Pv = P (percent mode) and immerse the probe in the product (values shown below are arbitrary example values only):

0% ( LRV) =14.20 pF 100% (URV) = 34.20 pF Span = 20 pF Current level = 28.20 pF Change in capacitance = 28.20 – 14.20 = 14 Current percent of span = 14/20 = 70% LCD displays 78.00 (percent)

In this example, to decrease the reading to 70.00, you need to press (+) to increase the span, which will reduce the percentage, until the value reaches 70.00. If the steps are too big you need to change the stepsize (menu 09) to a lower value.

Changing stepsize value: menu 09

The factory setting is 1: the LCD displays U: 1.0

Set rotary switch to 09, and press BLUE (–) button to reduce stepsize: values range from

0.01 to 1,000. Example:

LCD displays 78.00 (percent) Known percent of span = 70% Decrease needed is 8, but setting for stepsize is 10: menu 09 set to U: 10. Press BLUE (–) button to reduce stepsize to 1: LCD displays U: 1.0. Return to OF, and decrease value to 70.00 (percent).

You may still need to reduce the stepsize further. If changing the stepsize value has no apparent effect, press both buttons simultaneously to change the reading to 100%. From there you may adjust it until the correct percentage reading is reached.

In capacitance mode, the display for menu 0F shows the actual URV, but in percent mode, when you adjust the reading, you are in fact stepping the capacitance value. As you step the capacitance down, you decrease the range and reduce the span, so the percentage increases in relation to the smaller span. Therefore the (+) and (–) buttons appear to function in reverse.

Page 44 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Select capacitance or percent mode for dynamic primary variable (PV):

menu 01

a. To see the value displayed as percent, select menu 01 and press both buttons to

set Pv = P.

b. To see the value displayed as pF, select menu 01 and increase or decrease the

value till Pv = 0.

The SITRANS LC 500 is now ready to operate. For a table showing the different functions available, and the combinations of switch position and button presses used to carry out these functions, see page 41. For a detailed list of menu items, see

on page 54.

Groups

Appendix A: Menu

Notes:

• During normal operation, the 4 and/or 20 mA point can be calibrated at any time.

• If the difference in the capacitance value between the 4 mA point and the 20 mA point is smaller than the minimum span value (3.3 pF), the new value will not be accepted.

• To revert to factory settings, select menu 12 and press both buttons: the display will read FAC A.

Start Up

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 45

Calibration using HART

Start Up

The SITRANS LC 500 transmitter can be calibrated using HART, with a HART communicator circumstances determine the manner in which calibration takes place. If the circumstances allow the product to be brought to the 0% and 100% point level, calibration is simple.

; a laptop running Simatic PDM, or with the Host system (DCS). The local

Notes:

• Use the arrow keys, up, down, forward and back, to navigate within the menus.

• Use the back arrow to return to previous screens.

Examples of calibration using a Rosemount 275 hand-held communicator, fitted with the GENERIC device descriptor:

Example 1

For situations where the level of the product can be easily adjusted to 0 and 100%.

1. Switch on the 275 and request connection with the SITRANS LC 500.

a. Select: Online b. Select: Device setup c. Select: Diag service d. Select: Calibration e. Select: Apply values

(Display reads: Loop should be removed from automatic control. Select: Ok) f. Select: 4 mA g. Select: Apply new 4 mA input

2. Bring the level of the product to the level which corresponds with 4 mA.

a. Select: Read new value b. Select: Set as 4 mA value: the 4 mA point has now been set. c. Select: 20 mA d. Select: Apply new 20 mA input

3. Bring the level of the product to the level which corresponds with 20 mA.

a. Select: Read new value b. Select: Set as 20 mA value: the 20 mA point has now been set. c. Select: Exit

(Display reads: Loop may be returned to automatic control. Select: Ok)

Calibration is complete.

For a diagram showing how to connect the HART communicator, see

configuration with HART

Page 46 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

on page 32.

Typica l PLC

Example 2

For situations where the capacitance values are known in advance.

1. Switch on the 275 and establish connection with the SITRANS LC 500.

a. Select: Online b. Select: Device setup c. Select: Diag service d. Select: Calibration e. Select: Enter values f. Select: PV LRV

2. Enter required capacitance value for 0% of the range.

a. Select: PV URV

3. Enter required capacitance value for 100% of the range.

a. Select: Send (the values are now sent) b. Select: Put loop in manual c. Select: Return loop to auto

Example 3

For situations where the capacitance values are unknown, and the level of the product cannot be easily adjusted to 0% and 100%. In this case it is necessary to measure the capacitance value at various levels. These values can be read in % with the 275 communicator.

Note: The more accurately the values are measured at 0% and100%, the more

accurate the final result will be.

Start Up

1. Switch on the 275 and establish connection with the SITRANS LC 500.

a. Select: Online b. Select: PV c. The measured value can be read continuously, even if the current loop value is

min. or max.

2. Write down the measured value in pF, and record the corresponding level.

Example:

• the measured PV value is 181 pF at 79%

• the measured PV value is 52 pF at 17%

(181– 52)pF

(79 – 17)%

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 47

= 2.08 pF per %.

Start Up

The capacitance value for a 17% change in level is 17 * 2.08 = 35.37 pF.

The capacitance value for 0% is 52 – 35.37 = 16.62 pF (initial capacitance value).

The capacitance value for 100% is (100 * 2.08) + 16.62 = 208 + 16.62 = 224.6 pF.

3. Enter the calculated values for 0% and 100%, to calibrate the SITRANS LC 500 as described in Example 2.

Example 4

For situations involving the re-adjustment of the LRV where the actual value is determined to be one value but the measurement shows a different value.

1. Switch on the 275 and establish connection with the SITRANS LC 500.

a. Select: Online

b. Select: PV

The measured value can now be read continuously.

2. Write down the measured value in pF: assume it is 80 pF.

Example:

Assume that the URV is set to 240 pF, that the actual value is 17%, but the

measurement is showing a different value.

the measured value = 80 pF

(100 – 17) % = 83%

(240 – 80) pF = 60 pF

160 pF 83%

The capacitance value for 100% (URV) is 100 * 1.927 = 192.7pF

= 1.927 pF per %

The new LRV should be 240 –192.7 = 47.22 pF.

3. Adjust URV and LRV by following the steps in Example 2.

If the DCS and/or the 275 are fitted with the Device Descriptor for the SITRANS LC 500, more functions can be used.

The available functions are:

Number Description

(48) Read Additional Transmitter Status (38) Reset Configuration Changed Flag

(128) Set Alarm Select (129) Adjust for Product Build-up on Sensor

Page 48 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Number Description

(130) Read Failsafe Mode selection (131) Return device configuration info (132) Set Variable Upper Limit (133) Set Variable Lower Limit (134) Write keylock value (135) Read keylock value (138) Write simulation time and value (139) Read simulation time and value (140) Write TV1 Units, URV and LRV (141) Read TV1 Units, URV and LRV (144) Reset Max/Min recorded PV (145) Read Max/Min recorded PV (150) Write analog signalling mode (151) Read analog signalling mode (152) Write digital signalling mode (153) Read digital signalling mode (154) Write analog threshold settings (155) Read analog threshold settings (156) Write digital threshold settings (157) Read digital threshold settings (160) Write timers analog signalling (161) Read timers analog signalling (162) Write timers digital signalling (163) Read timers digital signalling

Start Up

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 49

Maintenance

Test function

Auto Self-testing

SITRANS LC 500 continuously performs a variety of tests to verify that the device is functioning correctly. These include a test where a known capacitor is applied to the input of the device. The internal results must match the known capacitance value. If a deviation is detected the Fault/Failure can be flagged with a pre-set loop-current (user configurable) and as a status in each HART message.

Manual testing

In order to test the proper processing of signals in PLC/DCS equipment, SITRANS LC 500 allows you to invert the output signal status. In Menu 11, when both buttons are pressed simultaneously, the signal outputs switch to their opposite state. When the buttons are released, the outputs revert to the initial state.

Note: If a Fault or Failure is present, its signal will take precedence over the test

function.

If no Fault/Failure is present and no buttons are pressed, the display for menu 11 alternates between two test patterns which together illuminate all the segments of the display. If the loop-current control is in analog mode the loop current will hold the last value, during this test.

Inspections

Under normal circumstances, the SITRANS LC 500 transmitter requires no maintenance. However, we recommend that you schedule periodic inspections of SITRANS LC 500.

The inspection can be subdivided into two parts:

1. Visual Inspection: confirm the following conditions:

a. Inside enclosure is clean and dry.

b. Enclosure sealing is intact and functioning properly (not hardened).

Maintenance

Page 50 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

c. All screw connections are tight.

d. Ground connections inside the housing are solid.

e. Ground connections outside the housing are solid.

f. The coaxial connector is free of dirt or deposits.

g. No cables or wires are jammed under the cover.

2. Functional Checks

a. Check for required minimum terminal voltage (see page 23 for supply voltage

requirements).

b. Confirm that Menu 08 is set to enable analog fault signalling: display should read

F: Hi or F: Lo. (If there is a fault condition, it will read F= Hi or F= Lo, when buttons are released.)

c. Check that the current goes to the alarm position (3.6 or 22 mA) if the coaxial

plug is unplugged: at menu 00, the LCD should display ‘ooL’. After the test, replace the coaxial plug.

d. Confirm that Menu 18 is set to enable digital fault signalling: the LCD should

display F= cc or F= co, when buttons are released.

e. Check that the solid-state output goes to the alarm position (open/close) if the

coaxial plug is unplugged. After the test, replace the plug.

f. Via HART:

Check that the PV goes to 0 pF when the coaxial plug is unplugged, (±0.15 pF is allowed). If it does, switch the output current to 4 mA and check the current through the loop, then to 20 mA and check the current through the loop. After the test, replace the plug.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 51

Maintenance

Troubleshooting: SITRANS LC 500

If you are unable to change settings:

• check that keylock level (menu 1F) is set to 0: the display should read PL = 0

• check that menu 01 is set appropriately: if Pv = 1, changes can only be made via

HART

If you can change settings:

• reset menu 12 to factory settings: press both buttons, and the display should

read FAC A

If the LCD displays a negative reading, typically around minus 300 pF, this often indicates a short circuit in the probe assembly:

• check the enclosure and make sure no water has got in

• check that all the connections in the probe assembly are solid

Troubleshooting

Page 52 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Error Messages and Error Codes

Error Messages (push-button operation)

Error Message

Flta

ooL

Alternates with the primary variable (PV).

Description Cause

Fault/failure has been detected

Output out-of-limits

Error Codes (HART)

Error Code

32 program memory checksum error Device is faulty

Description Cause

signal error: the measurement circuitry stopped functioning

DAC drive failure: the current as set by the DAC does not match the value measured by the ADC

PV value is outside the limits set (USL and LSL)

•Device is faulty

• Possible short circuit in the probe or the device wiring

• Possible fault in the device, or lack of sufficient energy at the device terminals

The product level has risen above the Upper Sensor LImit, or fallen below the Lower Sensor Limit

Possible short circuit in the probe or the device wiring

Possible fault in the device, or lack of sufficient energy at the device terminals

Usually indicates a fault in the connection between the transmitter module and the probe (the coaxial connector is off)

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 53

Troubleshooting

Appendix A: Menu Groups

The data in the transmitter is accessible as 281 menu items divided between two menu levels: 00 to 0F and 10 to 1F. You can switch between the two levels at position 00 and 10.

Appendix A

The menu items are grouped according to function, with a detailed description of each item. The menu groups are shown below.

Transmitter – Variable Settings

Stepsize

Update

Val ue

Menu 09 Menu 0A Menu 0B Menu 0C Menu 0D Menu 0E Menu 0F

s e e p a g e 5 5 s e e p a g e 5 6 s e e p a g e 5 6 s e e p a g e 5 7 s e e p a g e 5 7 s e e p a g e 5 8 s e e p a g e 5 9

Damping

Lower

Sensor Limit

Transmitter – Variable Values

Dynamic Value:

Primary Variable (PV)

Menus 00 and 10 Menu 02 Menu 01 Menu 1C

see page 59 see page 60 see page 60 see page 61

Highest Lowest

Recorded Value

Analog Output Signalling (loop current)

U p p e r

Threshold

Delay

Menu 03 Menu 04 Menu 05 Menu 06 Menu 07 Menu 08

see page 62 see page 62 see page 63 see page 64 see page 64 see page 66

Lower

Threshold

Delay

Upper

Threshold

Setting

Upper

Delta Range

Tra nsm itt er Va ria ble

– select for PV

Lower

Threshold

Setting

Lower Range

Val ue

Transmitter Variables

Dynamic Value

Ana log

Signalling

Mode

Upper Range

Val ue

Analog

Fa ult

Signalling

Digital Output Signalling (solid-state output)

U p p e r

Threshold

Delay

Menu 13 Menu 14 Menu 15 Menu 16 Menu 17 Menu 18

see page 67 see page 68 see page 68 see page 69 see page 70 see page 71

Lower

Threshold

Delay

Upper

Threshold

Setting

Lower

Threshold

Setting

Di git al

Signalling

Mode

Digital

Fa ult

Signalling

Miscellaneous

Ou tpu t Si gna l

Processing Test

Menu 11 Menu 12 Menu 19 Menu 1F

see page 72 see page 72 see page 73 see page 73

Only 28 of the possible 32 items are currently used.

Page 54 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Factory Settings Range Inversion Keylock Level

Menu Items

Notes:

• Check that you are at the correct menu level before selecting a menu item.

• Hold the RED or BLUE buttons for longer than the preset delay, or debounce time to change a setting: this debounce time is generally around a second, but varies from one menu item to another.

• Protection is set at keylock level, menu 1F: make sure the setting is appropriate.

• The transmitter variable, units as pF, units user-defined, or values as percent, is set at menu 01; make sure the setting is appropriate.

• Reset to factory settings at menu 12: factory settings are indicated with an asterisk in the tables, unless explicitly described.

Transmitter: Variable Settings: menu level 0

Notes:

• You must select menu level 0 before you can access the items at that level.

• The transmitter variable must be set for units in pF to enable settings to be changed by push-button adjustment: (menu 01 must be set to PV = 0).

Stepsize Update Value

This menu selection controls the increment/decrement step-size for the menus 0B, 0C,

0F, and 03.

0D, 0E,

Affected

Item

by:

09 01 9 Off

Rotary Switch Position

Left Arrow

Description Values

Stepsize Update Value Range: 0.01 to 1000 Factory setting U: 1.0

Appendix A

1. Set the rotary switch to 9.

2. Press the RED (+) or BLUE (–) button to increase or decrease this value in decades: you can step the value up to 10, 100, and 1000 (1E3), or down to 0.1 and

0.01.

3. Press and hold both buttons simultaneously to restore the value to U:1.0

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 55

Damping

Damping slows the measurement response to a change in level, and is used to stabilize the reading change for the dynamic value of the TV currently selected.

The increment/decrement step size is subject to the setting on Menu 09.

Appendix A

Menu Item

0A 01, 09 A Off

Lower Sensor Limit

The Lower Sensor Limit (LSL) is the lower of two limit settings. Whenever the PV value (Menu level 0) drops below the Lower Sensor Limit, the measurement is considered at fault and the LCD displays ooL, alternating with PV.

If the display mode is in %, this selection is disabled and the LCD displays - - - -. The transmitter variable on which this menu selection operates is chosen in Menu 01.

The increment/decrement step size is subject to the setting from Menu 09.

Menu Item

0B 01, 09 B Off

. The Damping Value is not in seconds but is a factor that controls the rate of

Affected by:

1. Set the rotary switch to A.

2. Press the RED (+) or the BLUE (–) button to alter the value between 1 and 10,000. or: Press and hold a button to start a repeat function, or: Press and hold both buttons simultaneously to reset the value back to 1.0 0 .

Affected by:

Rotary Switch Position

Left Arrow

Description Values

Damping Range: 1 to 10,000 Factory setting 1. 0 0

Description Values

Lower Sensor Limit Range 0 to 3300 Factory setting 1.6 6

1. Set the rotary switch to B.

2. Press the RED (+) or BLUE (–) buttons to alter this value. or: Press and hold a button to start a repeat function, or: Press and hold both buttons simultaneously to take the current PV reading as the new setting.

For example, in an application with an agitated surface.

Page 56 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Upper Sensor Limit

The Upper Sensor Limit (USL) is the upper of two limit settings. Whenever the PV value (Menu Level 0) rises above the upper limit setting, the measurement is considered at fault and the LCD displays ooL, alternating with PV.

If the display mode is in %, this selection is disabled and the LCD displays - - - -. The transmitter variable on which this menu selection operates is chosen in Menu 01.

The increment/decrement step size is subject to the setting from Menu 09.

Affected

Item

by:

0C 01, 09 C Off

1. Set the rotary switch to C.

2. Press the RED (+) or BLUE (–) button to increase or decrease this value. or: Press and hold a button to start a repeat function. or: Press and hold both buttons simultaneously to take the current PV reading as the new setting.

Rotary Switch Position

Left Arrow Description Values

Upper Sensor Limit 3300 to 0 Factory setting 3300

Delta Range Setting

The Delta Range Setting allows you to commission the unit for overfill or underfill protection where it is impossible to bring the product to those levels in normal process conditions. This feature is not normally used for the SITRANS LC 500.

Overfill protection is used in applications where the probe is normally uncovered. Delta Range Setting adds the minimum span to the Lower Range Value: the result is used to update the Upper Range Value. If the process level exceeds the new URV, a fault is signalled.

Underfill protection would be used in applications where the probe is normally covered. In this case, Delta Range Setting subtracts the minimum span from the Upper Range Value and uses the result to update the Lower Range Value. If the process value drops below the new LRV, a fault is signalled.

The loop-current control must be in 2-state mode (Menu 07) for Menu 0D to display the Delta Range Setting. When the loop-current control is in Analog mode, Menu 0D displays - - - -.

Appendix A

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 57

The transmitter variable on which this selection is based is chosen in Menu 01. The increment/decrement step size is set at Menu 09.

Menu Item

Appendix A

0D 01, 07, 09 D Off

Lower Range Value

Lower Range Value (LRV) is the setting for 0% of the operating range, in most cases an empty vessel/tank. If the display mode is in % this selection is disabled and the LCD displays - - - -.

The transmitter variable on which this menu selection operates is chosen in Menu 01. For TV0 the LRV is in most cases Factory Set to the probe capacitance in free air.

The increment/decrement step size is subject to the setting from Menu 09.

Menu Item

0E 01, 09, 0B, 0C E Off Analog

Affected by:

Rotary Switch Position

Left Arrow

Mode Description Values

2-state

Analog *

Delta Range Setting (enabled)

Span setting

Display shows

- - - -

Mode Description Values

Lower Range Val ue

Factory setting

Display percent Display shows

Range: 0.00 to 3300

Probe capacitance in air

- - - -

1. Set the rotary switch to E.

2. Press and hold both buttons simultaneously to take the current PV reading as the new setting. or: Press the RED (+) or BLUE (–) button to step the value up or down. or: Press and hold a button for a prolonged time to start a repeat function.

When the new setting exceeds that of the Limit Settings (Menu 0C and 0B), the new value is rejected and the previous value remains unchanged.

Page 58 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Upper Range Value

Upper Range Value (URV) is the setting for 100% of the operating range, in most cases a full vessel/tank. The transmitter variable on which this menu selection operates is chosen in Menu 01. For TV0, the URV is in most cases Factory Set to the probe capacitance in water.

The increment/decrement step size is subject to the setting from Menu 09.

Affected

Item

by:

0F 01, 09, 0B, 0C F Off Analog

1. Set the rotary switch to F.

2. Press and hold both buttons simultaneously to take the current PV reading as the new setting. or: Press the RED (+) or BLUE(–) button to step this value up or down. or: Press and hold a button for a prolonged time to start a repeat function.

When the new setting exceeds that of the Limit Settings (Menu 0C and 0B), the new value is rejected, and the previous value remains unchanged.

Rotary Switch Position

Left Arrow

Mode Description Values

Upper Range Value

Factory setting

Display percent Display shows

Range: 3300 to 0

Probe capacitance in water

- - - -

Transmitter Variable Values: menu level 0

Appendix A

Dynamic Value, Primary Variable (PV): menu 00 and menu 10

Note: Menus 00 and 10 are the only locations where you can change from level 1 to

level 0, or vice versa.

The value for the Primary Variable is displayed as either units or percent of range, selected in menu 01. When 2-state mode is selected in menu 07 the LCD display indicates the probe status:

• blinking for an uncovered probe

• steady for a covered probe

If the internal diagnostics detect a fault or failure, the display alternates between the PV value and the fault/failure message ‘Flt’. If the product level goes outside the limit settings, then the display alternates between the PV value and ‘ooL’. Alternatively, if the simulation

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 59

(SIM) function has been selected via HART, the LCD alternately displays the text SIM or the applied simulation value for the duration of the simulation.

Rotary Switch Position

Appendix A

Affected

Item

by:

01 0

10 On

To change from menu 10 to menu 00:

1. Set the rotary switch to 0.

2. Press the RED (+) button for about a second. The LCD briefly displays : M 00 followed by : SEL 0, to indicate that menu 00 is selected. When the button is released the LCD displays the current PV value. No left-arrow is displayed at the top left corner of the LCD in menu 00.

To change from menu 00 to menu 10:

1. Set the rotary switch to 0.

2. Press the BLUE button for more than one second. The LCD briefly displays : M 10 followed by : SEL1, to indicate that menu level 1 is selected. Then the LCD displays PV, and a left-arrow is visible in the top left corner of the LCD, indicating menu level 1.

Display the Highest / Lowest Recorded Value

Rotary

Switch

Item

Position

02 2 Off Highest / Lowest Recorded Value

Left Arrow Description

Left Arrow

Off

Description Values

Dynamic Value (PV)

Units or % of range, selected in menu 01

1. Set the rotary switch to 2. The Highest / Lowest recorded values for TV currently selected are displayed alternately.

2. Press the RED (+) button to select the Highest recorded value for display, or: Press the BLUE (–) button to select the Lowest recorded value for display,

3. Press both buttons simultaneously for more than one second to reset the recorded values back to the dynamic value of this TV. (This will also occur after a reset [power-down] of the device.)

Select the Transmitter Variable (TV) for the Primary Variable (PV).

Rotary

Switch

Item

Position

01 1 Off

Page 60 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Left Arrow

Description Values

0*TVO (units are pF)

Transmitter Variable selection for PV

P TV0 (values displayed as %)

TV1 (units are user definable

only via HART)

1. Set the rotary switch to 1. The LCD displays Pv = 0, 1, or P.

2. Press the RED (+) or BLUE (–) button to select a higher or lower value.

3. Press both buttons to select Pv = P.

Notes:

• When PV is set to 1, settings cannot be changed using push-button adjustment.

• Many settings cannot be changed using push-button calibration when PV = P.

Appendix A

If PV = 0, TV0 is selected for PV, URV, LRV, USL, LSL, Damping, and Highest/Lowest

recorded value. The units are implicitly

pF.

If PV = 1, TV1 is selected for PV, URV, LRV, USL, LSL, Damping, and Highest/Lowest

recorded value. The units are user definable but only by HART.

If PV = P, TV0 is selected: however, the values for PV and URV are displayed in %; LRV,

USL, LSL, are blanked out with - - - -; all other fields are identical to that of TV0.

Transmitter Variables Dynamic Value: menu level 1

This menu selection allows you to read the values of the dynamic variables TV0, TV1,

, and TV3. When no buttons are pressed, the LCD displays the dynamic value for TV0.

TV2

Rotary

Switch

Item

Position

1C C On

Left Arrow

Mode Description Action Values

TV0 *

TV1

TV2

TV3

Invalid selection

Transmitter Var iabl es Dynamic Value

No buttons pressed

Press and hold RED (+) button

Press and hold BLUE(–) button

Both buttons pressed simultaneously

Dynamic value for TV0

Dynamic value for TV1

Dynamic value for TV2

Dynamic value for TV3

Display shows 0.00

The units are pF: there is no other option.

TV2 and TV3 are not currently used, but are available for future development.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 61

Analog Output Signalling (proportional or 2-state): menu level 0

Analog mode (the loop-current) can provide either:

• a 4 to 20 / 20 to 4 mA output proportional to the percent of the range

• a 4 or 20 / 20 or 4 mA output, when 2-state mode is selected

Appendix A

Note: To set values for Upper and Lower Threshold Delay, and Upper and Lower

Threshold Setting (2-state mode), the loop-current menu (07) must be in 2-state mode. When the loop-current control is in analog mode, the LCD displays only - - - - for these menu selections.

Upper Threshold Delay (2-state mode)

The Upper Threshold Setting controls the Activation delay: the amount of time that has to pass uninterrupted with the probe covered to a level above the Upper Threshold Setting before the timer expires. When the timer expires, the output signal complies with the setting from Menu 08 for a covered probe. Whenever the level drops below the Upper Threshold Setting before the timer expires, the timer is restarted.

As an extra identifier, an upward running A is displayed to the right of the value.

Affected

Item

by:

03 07 3 Off

1. Set the loop-current control (Menu 07) to 2-state mode.

2. Set the rotary switch to 3.

3. Press the RED (+) or BLUE(–) button to increase or decrease the value. or: Press and hold a button to start a repeat function. or: Press and hold both buttons simultaneously to toggle the value between minimum (0) and maximum (100).

Rotary Switch Position

Left Arrow

Mode

2state

Analog *

Added Indicator

Upward running A at right of value

Description Values

Upper Threshold Delay

in seconds

Display shows

- - - -

Lower Threshold Delay (2-state mode)

The Lower Threshold Setting controls the Deactivation delay: the amount of time that has to pass uninterrupted with the probe covered to a level below the Lower Threshold Setting before the timer expires. When the timer expires, the output signal will comply with the setting from Menu 08 for an uncovered probe. Whenever the level rises above the Lower Threshold Setting before the timer expires, the timer is restarted.

As an extra identifier, a downward running A is displayed to the right of the value..

Page 62 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Affected

Item

by:

04 07 4 Off

Rotary Switch Position

Left Arrow

Mode

2state

Analog

Added Indicator

Downward running A at right of value

Description Values

Lower Threshold Delay

1. Set the loop-current control (Menu 07) to 2-state mode.

2. Set the rotary switch to 4.

3. Press the RED (+) or BLUE(–) buttons to increase or decrease the value. or: Press and hold a button to start a repeat function. or: Press and hold both buttons simultaneously to toggle the value between minimum (0) and maximum (100).

Upper Threshold Setting (2-state mode)

The Upper Threshold Setting is the % of range above which the probe is considered covered. In order to switch the output signal, the corresponding delay time has to be met (Menu 03).

The loop-current control (Menu 07) must be in 2-state mode for this menu to display the Upper Threshold Setting in percent. As an extra identifier, an upward ramp is displayed to the right of the value.

Appendix A

in seconds

Display shows

- - - -

Affected

Item

by:

05 07 5 Off

Rotary Switch Position

Left Arrow

Mode

2-state

Analog *

Added Indicator

Upward ramp a t right of value

Description Values

Upper Threshold Setting

% of range

Display shows

- - - -

1. Set the loop-current control (Menu 07) to 2-state mode.

2. Set the rotary switch to 5.

3. Press the RED (+) or BLUE (–) button to increase or decrease the value. or: Press and hold a button to start a repeat function.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 63

Lower Threshold Setting (2-state mode)

The Lower Threshold Setting is the % of range below which the probe is considered uncovered. In order to switch the output signal, the corresponding delay time has to be met (Menu 04).

The loop-current control (Menu 07) must be in 2-state mode for this menu to display the

Appendix A

Upper Threshold Setting in percent. As an extra identifier, a downward ramp is displayed to the right of the value.

Affected

Item

by:

06 07 6 Off

1. Set the loop-current control (Menu 07) to 2-state mode.

2. Set the rotary switch to 6.

3. Press the RED (+) or BLUE (–) button to increase or decrease the value. or: Press and hold a button to start a repeat function.

Rotary Switch Position

Left Arrow

Mode

2-state

Analog *

Added Indicator

Downward ramp at right of value

Description Values

Lower Threshold Setting

Analog Signalling Mode (2-state): menu level 0

Note: Menu 08 has precedence over the settings in Menu 07.

The factory setting is for Analog mode (the loop-current is proportional with the percentage of the range). When no buttons are pressed, the LCD displays the current mA value.

2-state Signalling Mode provides a 4 mA or 20 mA output. The settings are relative to a covered probe:

• C: Hi selects a 20 mA signal for a covered probe, which switches to 4 mA if the probe becomes uncovered.

• C: Lo selects a 4 mA signal for a covered probe, which switches to 20 mA if the probe becomes uncovered.

% of range

Display shows

- - - -

Page 64 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Menu selections 03, 04, 05, and 06 set the criteria for delay and threshold that have to be met for a change in output signal.

Affected

Item

by:

03, 04, 05,

06, 08

While button is pressed, display reads C: Hi. When button is released, display

Rotary Switch Position

7Off

Left

Mode Description Action Values

Arrow

Analog *

2state

Signal proportional to % of range

2-state

High Press RED (+)

Low Press BLUE (–)

2-state

Press both buttons simultaneously

Display shows C: An

Display shows C: Hi

Display shows C: Lo

shows 20.00 if the probe is covered, or 4.00 if it is uncovered.

While button is pressed, display reads C: Lo. When button is released, display shows 4.00 if the probe is covered, or 20.00 if it is uncovered.

Set the rotary switch to 7. To change the mode to 2-state High, press the RED (+) button for more than one second: the LCD displays C: Hi. When the button is released, the loopcurrent will switch to 20 mA if the probe is covered, or 4 mA if it is uncovered.

To change the mode to 2-state Low, press the BLUE (–) button for more than one second: the LCD displays C: Lo. When the button is released, the loop-current will switch to 4 mA, and if the probe is uncovered, or 20 mA if the probe is covered.

Analog Mode may be restored at any time by pressing both buttons simultaneously for more than one second. The LCD displays C: An while the two buttons are pressed, and displays the current reading when the buttons are released.

The loop-current will be between 3.8 and 20.5 mA, and will saturate to one of these values if the level goes beyond the Upper or Lower range settings.

Appendix A

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 65

Analog Fault Signalling (2-state)

Note:

• 2-state mode must be selected at menu 07.

• This menu selection controls the current-loop fault/failure signal output. This signal has precedence over the settings on Menu 07.

Appendix A

When 2-state fault signalling is enabled, in the case of a fault the mA output is 3.6 mA or

, depending on the setting. The mA output is viewed at menu 07.

22 mA

Menu Item

08 8 Off

Rotary Switch Position

Left Arrow

Description Action Values

2-state Fault Signalling (disabled)

2-state High Fault Signalling (enabled)

2-state Low Fault Signalling (enabled)

Press both

buttons simultaneously

Press RED (+)

Press BLUE (–)

Display shows F: - -

Display shows F: Hi

Display shows F: Lo

If the LCD displays an equal sign (=) in place of the colon (:) this indicates that

the loop-current is at fault/failure level. For example F: Hi becomes F= Hi.

Set the rotary switch to 8.

• To change the mode to 2-state High, press the RED (+) button for more than a second: the display reads F: Hi. In the case of a fault/failure the loop-current goes to

22.0 mA.

• To change the mode to 2-state Low, press the BLUE (–) button for more than a second: the display reads F: Lo. In the case of a fault/failure the loop-current goes to

3.6 mA.

For detailed information, see

Fault Signalling

on page 15.

Page 66 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Digital Output Signalling (solid-state output): menu level 1

To set values for Upper and Lower Threshold Delay, and Upper and Lower Threshold Setting, the solid-state switch output must be enabled (menu 17). When solid-state switch output is disabled these menu selections display only - - - -.

Upper Threshold Delay (solid-state output)

The Upper Threshold Delay controls the Activation delay: the amount of time that has to pass uninterrupted with the probe covered to a level above the Upper Threshold Setting before the timer expires. After the timer expires, the output signal will comply to the setting from Menu 18 for a covered probe. Whenever the level drops below the Upper Threshold Setting before the timer expires, the timer is restarted.

When the solid-state switch control (Menu 17) is disabled, menu 13 displays - - - -. When the solid-state switch control is enabled, menu 13 displays the Activation delay in seconds. As an extra identifier, an upward running d is displayed to the right of the value.

Affected

Item

by:

13 17 3 On

First select the solid-state switch output at menu 17 (contact open or contact closed).

1. Set the rotary switch to 3.

2. Press the RED (+) or BLUE (–) button to increase or decrease the value.

or: Press and hold a button to start a repeat function. or: Press both buttons simultaneously to toggle the value between minimum (0) and maximum (100).

Rotary Switch Position

Left Arrow

Mode Identifier

Solid-state switch control enabled

Solid-state switch control disabled

Upward running d at right of value

Description

Upper Threshold Delay

Appendix A

Values

Range: 0 to 100 (seconds)

Display shows

- - - -

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 67

Lower Threshold Delay (solid-state output)

The Lower Threshold Delay controls the Deactivation delay: the amount of time that has to pass uninterrupted with the probe covered to a level below the Lower Threshold Setting before the timer expires. After the timer expires, the output signal will comply to the setting from Menu 18 for an uncovered probe. Whenever the level rises above the Lower Threshold Setting before the timer expires, the timer is restarted.

Appendix A

When the solid-state switch control (Menu 17) is disabled, menu 14 displays only - - - -. When the solid-state switch control is enabled, this menu displays the Deactivation delay in seconds. As an extra identifier, a downward running d is displayed to the right of the value.

Affected

Item

by:

14 17 4 On

Rotary Switch Position

Left Arrow

Mode Identifier

Solid-state switch control enabled

Solid-state switch control disabled

Downward running d at right of value

Description

Lower Threshold Delay

First select the solid-state switch output at menu 17 (contact open or contact closed).

1. Set the rotary switch to 4.

2. Press the RED (+) or BLUE(–) button to increase or decrease the value.

3. or: Press and hold a button to start a repeat function.

4. or: Press both buttons simultaneously to toggle the value between minimum (0)

and maximum (100).

Upper Threshold Setting: (solid-state output)

The Upper Threshold Setting is the % of range above which the probe is considered covered. In order to switch the output signal, the corresponding delay time has to be met (Menu 13).

When the solid-state switch control (Menu 17) is disabled, menu 15 displays only - - - -. When the solid-state switch control is enabled, menu 15 displays the Upper Threshold setting in percent. As an extra identifier, an upward ramp is displayed to the right of the value.

Values

Range: 0 to 100 (seconds)

Display shows

- - - -

Page 68 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Affected

Item

by:

15 17 5 On

Rotary Switch Position

Left Arrow

Mode Identifier

Solid-state switch control enabled

Solid-state switch control disabled

Upward ramp a t righ t of value

Description

Upper Threshold Setting

First select the solid-state switch output at menu 17 (contact open or contact closed).

1. Set the rotary switch to 5.

2. Press the RED (+) or BLUE (–) button to increase or decrease the value.

or: Press and hold a button for a prolonged time start a repeat function.

Lower Threshold Setting: (solid-state output)

The Lower Threshold Setting is the % of range below which the probe is considered uncovered. In order to switch the output signal, the corresponding delay time has to be met (Menu 14).

If the solid-state switch control (Menu 17) is disabled, menu 16 displays - - - -. When the solid-state switch control is enabled, menu 16 displays the Lower Threshold Setting in percent. As an extra identifier, a downward ramp is displayed to the right of the value.

Values

Appendix A

% of range

Display shows

- - - -

Affected

Item

by:

16 17 6 On

Rotary Switch Position

Left Arrow

Mode

Solid-state switch control enabled

Solid-state switch control disabled

Added indicator

Downward ramp a t righ t of value

Description

Lower Threshold Setting

Values

% of range

Display shows

- - - -

First select the solid-state switch output at menu 17 (contact open or contact closed).

1. Set the rotary switch to 6.

2. Press the RED (+) or BLUE (–) button to increase or decrease the value.

or: Press and hold a button to start a repeat function.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 69

Digital Signalling Mode (solid-state output)

Note: Menu 18 has precedence over menu 17.

Controls the solid-state switch output and allows you to set the switch to contact open or contact closed. The settings are relative to a covered probe, and the criteria are set in menu 15 and 16. With contact closed, the switch is on: with contact open the switch is off.

Appendix A

While a button is pressed, the LCD displays S: cc open). When the button is released an equal sign (=) indicating status replaces the colon, and the reading depends on the status of the probe

Example: S = cc is selected (contact closed with a covered probe)

• If the probe is uncovered when the button is released, the display changes from

S: cc to S=co.

• If the probe is covered when the buttons are released, the display changes to

S = cc.

• If you press either button briefly, the LCD displays the current setting, in this

case, S: cc.

Affected

Item

by:

17 18 7 On

While the button is pressed: when released the display depends on the probe status.

Rotary Switch Position

Left Arrow

(contact closed) or S: co (contact

Mode

Disabled *

Digital Signalling Mode

Description

Contact Closed: switch on

Contact Open: switch off

Action Values

Press and hold both buttons

Press and hold RED (+) button

Press and hold BLUE (–) button

Display shows S: - -

Display shows S: cc

Display shows S: co

1. Set the rotary switch to 7.

2. Press and hold the RED (+) or BLUE (–) button to select contact open or contact

closed. or: Press and hold both buttons to disable this function.

Menu selections 13, 14, 15 and 16 set the criteria for delay and threshold that have to be met for a change in output signal.

A colon at the extreme left of the display appears while the button is pressed to indicate when a setting is accepted, for example : S: cc.

If digital fault signalling is enabled at menu 18, it takes precedence, and no equal sign will appear in the display for menu 17 if the device is responding to a fault.

Page 70 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Digital Fault Signalling

Note: This signal has precedence over the settings on Menu 17.

Controls the solid-state switch response to a fault/failure and allows you to select either contact open or contact closed. With contact closed the solid-state switch will be on: with contact open the solid-state switch will be off.

While a button is pressed, the LCD displays F: cc When the button is released an equal sign (=) indicating status replaces the colon, and the reading depends on the status of the probe.

Example: F = cc is selected (contact closed when fault is detected)

• If a fault condition exists when the button is released, the display changes from

F: cc to F=cc.

• If no fault condition exists when the button is released, the display shows F: cc.

• If you press either button briefly, the LCD displays the current setting, in this

case, F: cc.

Rotary

Switch

Item

Position

18 8 On

Left Arrow

Mode Description Action Values

Disabled *

Digital Signalling Mode

Set the rotary switch to 8. Press the RED (+) or BLUE (–) button to change the setting. The disabled mode can be restored at any time by pressing both buttons simultaneously for more than one second.

(contact closed) or F: co (contact open).

Display shows F: - -

Display shows F: cc

Display shows F: co

Contact Closed: switch on

Contact Open: switch off

Press and hold both buttons

Press and hold RED (+) button

Press and hold BLUE (–) button

Appendix A

A colon at the extreme left of the display appears while the button is pressed to indicate when a setting is accepted, for example : S: cc.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 71

Miscellaneous

Output Signal Processing Test

Displays the Fault/Failure information. If operation is normal, two test displays alternate, which light up all the LCD segments in a cycle. If there is a fault or failure, an error code is displayed. See the detailed list of error codes and their meanings, page 53.

Appendix A

Set the rotary switch to 1.

To change the state of the output signals, press and hold both buttons simultaneously: the digital mode outputs (the solid-state switch and the loop-current control in digital mode) change to their opposite state. Thus 4mA becomes 20mA and contact open becomes contact closed. This feature allows you to verify that the output signals are properly processed further on in the PLC/DCS system: if the normal state is non-alarm, changing the state should generate an alarm.

The outputs stay in the opposite state as long as both buttons are pressed.

Factory Settings

Displays whether the factory settings are still in place, or how much they have been changed, and allows you to restore the factory settings.

Rotary

Switch

Item

Position

11 1 On Output Signal Processing Test

Rotary

Switch

Item

Position

12 2 On

Left Arrow Description

Factory Settings FAC A

LCD Display

FAC P

FAC ?

Meaning

No parameters changed from factory setting

Range settings altered: timers and thresholds unchanged

More parameters have been changed

Set the rotary switch to 2. To restore the factory settings, press both buttons simultaneously to change the LCD to ‘do it’ and hold both buttons for more than one second. When the buttons are released, the LCD displays FAC A.

Page 72 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Range Inversion

Displays whether the device is operating with a normal or inverted range setting. A normal range setting is where LRV (Menu 0E) is lower in value than URV (Menu 0F): the LCD displays nor. An inverted range is where LRV (Menu 0E) is higher in value than URV (Menu 0F): the LCD displays inv.

Rotary

Switch

Item

Position

19 9 On Range Inversion

1. Set the rotary switch to 9.

2. Press both buttons simultaneously for more than one second to toggle between

the two modes, effectively switching the values for LRV and URV.

Left Arrow Description Mode Values

normal * Display shows nor inverted Display shows inv

Keylock Level

Controls the access protection level for the device. The factory setting is a local protection level of 0, which places no restriction on modifying settings locally.

Note: HART settings override local settings:

• If the HART setting is 0, there are no restrictions, and you cannot change the protection to a higher level locally.

• If the HART setting is 3, no changes can be made, and this protection level cannot be changed locally.

• Protection level 1 disables the ability to set a value by pressing two buttons simultaneously.

• Protection level 2 disables the ability to change a value by stepping it up or down.

• Protection level 3 completely disables all changing of values.

Appendix A

Item

1F F On

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 73

Rotary

Switch

Position

1. Set the rotary switch to F.

2. Press the RED (+) or BLUE (–) button to change the setting.

Left

Arrow

Protection Display

Level Description

*No restrictions PL 0

No restrictions PH 0 Disables 2-button

adjustments Disables 1-button

adjustments Disables all

changes

local settings

PL 1 PH 1

PL 2 PH 2

PL 3 PH 3

HART settings

Appendix B: LCD display examples

LCD: alphanumeric display examples

Menu Item Indicator:

Menu Level Indicator:

Internal diagnostics detects anomaly:

Solid-state switch output closed when probe is

Appendix B

covered (displayed while button pressed):

Solid-state switch output open when probe is covered (displayed while button pressed):

Solid-state switch output closed and probe covered, = sign indicates current probe status (displayed when button released):

Solid-state switch output disabled:

Solid-state switch output open when Fault detected:

M 00

SEL 1

FLt

S: oc

S: oo

S= oc

S: – –

Current-loop, output in Analog (proportional) mode:

Indicator for range operation, normal (URV > LRV):

nor

Indicator for range operation, inverted (URV < LRV):

inv

Output out of limits, PV outside Variable Limits:

ooL

Indicator for Factory Set, all parameters are original:

FAC A

Indicator for Factory Set, range settings have been changed:

FAC P

Indicator for Factory Set, other settings have been changed also:

FAC?

Indicator for Factory Set, reset all variables back to factory setting:

F: oo

Solid-state switch output closed when Fault detected:

F: oc

Solid-state switch / current-loop output functions due to Faults are disabled:

F: – –

Current-loop, current goes to 22 mA when Fault detected:

Function test indicator, all outputs in digital mode invert their output status:

Transmitter variable selected for PV:

Keylock protection level:

do it

0 = /o

Pv=0

PL 0

Current-loop, current goes to 3.6 mA when Fault detected:

Page 74 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Simulation is active. Transmitter Variable TVO driven by simulation value:

SIM

Appendix C: HART Documentation

HART1 Communications for the SITRANS LC 500

Highway Addressable Remote Transducer (HART) is an industrial protocol that rides on top of a 4-20 mA signal. It is an open standard, and full details about HART can be obtained from the HART Communication Foundation at www.hartcomm.org

The SITRANS LC 500 can be configured over the HART network using either the HART Communicator 275 by Fisher-Rosemount, or a software package. There are a number of different software packages available.The recommended software package is the Simatic Process Device Manager (PDM) by Siemens.

HART Device Descriptor (DD)

In order to configure a HART device, the configurator must have the HART Device Descriptor for the unit in question. HART DD’s are controlled by the HART Communications Foundation. The HART DD for the SITRANS LC 500 will be released in

2003. Please check availability with the HART Communications Foundation. Older

versions of the library will have to be updated in order to use all the features in the SITRANS LC 500.

Simatic Process Device Manager (PDM)

Appendix C

This software package is designed to permit easy configuration, monitoring, and troubleshooting of HART and Profibus PA devices. The HART DD for the SITRANS LC 500 was written with Simatic PDM in mind and has been extensively tested with this software.

HART information

Expanded Device Type Code:

Manufacturer Identification Code = 84 Manufacturer Device Type Code = 248 Expanded Device Type Code = 21752

Physical Layer Information

Field Device Category = A Capacitance Number (CN) = 1

HART® is a registered trademark of the HART Communications Foundation.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 75

SITRANS LC 500 DD Menu/Variable Organization

ping

Root Menu

Device setup menu PV digital value PV upper range value PV lower range value SV digital value SV upper range value SV lower ran

Appendix C

e value

Devic e Setup Menu

Process variab les menu Diagnostics/ service Basic setup men u Detailed setup menu Autocal Review menu

Process Variables

Sensor digital value Input percent range A0 analog value PV maximum recorded PV minimum recorded Reset max/min records

Diagnostics/service

Self tes Loop test Calibration Dac trim

Basic Setup Menu

Tag PV digital units Device info menu PV transfer function PV dam

value

Detailed S etup Menu

Measuring elements menu Signal conditioning menu Output conditioning menu Device info menu

Autocal Menu

High calibration level Low calibration level

Review Menu Device Info Menu

Device type Private label distribution PV digital units Sensor units Upper sensor li mit Lower sensor limit Minimum span Damping value Input percent range Transfer funct ion Input range units Upper range value Lower range value A0 analog value A0 alarm code Write protect Manufacturer ID Device ID Tag Descriptor Message Date Universal re vision Transmitter revision Software revision Polling address Request preambles

Auto Calibr ation Menu

Applied rerange Keypad rerange Zero correction

Measuring Elements

PV upper sensor limit PV lower sensor limit PV minimum span PV sensor units PV Upper range value PV Lower range value

Signal Conditioning Menu

Damping value Upper range value Lower range value Transfer function Percent range

Out put Cond ition Me nu

Analog output menu Hart output menu

Private label distribution Device type Device ID Tag Date Write Protect Descriptor Message PV sensor serial numb er Final assembly numbe r Device revisions menu

Analog Output

PV analog value PV alarm select Dac trim Loop test

Hart Output Menu

Polling address Request preambles

Device Revisions

Universal revision Transmitter revision Software revision

Page 76 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

HART Response Code Information

Additional response code information, Second Byte.

Bit #7: Field Device Malfunction

When the transmitter detects a malfunction, the Analog Output will be set in a fault state.

Bit #6: Configuration Changed

When any of the settings in EEROM is changed either by a write command or by manual ZERO or SPAN adjust, this bit is set. Use command 38 to reset.

Bit #5: Cold Start

This bit is issued once after an initialisation cycle is complete; this can occur after a power loss or as a result of a (watchdog) reset.

Bit #4: Extended Status Available

When any of the extended status bits is set this flag is raised. Use command 48 to get detailed status information.

Bit #3: Output Current Fixed

This bit is set as long as the Primary Variable Analog Output is set to a fixed value.

Bit #2: Primary Variable Analog Output Saturated

Flag is set when the Primary Analog Output saturates below 3.8 mA and above 20.5 mA.

Bit #0: Primary Variable Out of Limits

This flag is set whenever the Transmitter Variable #0 (in pF), the Primary Variable exceeds the Sensor Limits returned with Command 14, Read Primary Variable Sensor Limits.

Appendix C

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 77

HART Conformance and Command Class

SITRANS LC 500 transmitter Conformance and Command Class summary.

Command

Number

Conformance Class #1

0 Return Unique Identifier Universal 1 Read Primary Variable

Conformance Class #1A

0 Return Unique Identifier Universal 2 Read PV Current and Percent of Range

Conformance Class #2

11 Read Unique Identifier Associated with Tag Universal 12 Read Message 13 Read Tag, Descriptor, and Date 14 Read Primary Variable Sensor Information 15 Read Primary Variable Output Information 16 Read Final Assembly Number

Conformance Class #3

3 Read Dynamic Variables and PV Current Universal

33 Read Selected Dynamic Variables Common Practice

Appendix C

48 Read Additional Transmitter Status Common Practice 50 Read Dynamic Variable Assignments Common Practice

Conformance Class #4

34 Write PV Damping Value Common Practice 35 Write Primary Variable Range Values 36 Set Primary Variable Upper Range Value 37 Set Primary Variable Lower Range Value 38 Reset Configuration Changed Flag 40 Enter/Exit Fixed Primary Var. Current Mode

Description Usage

Conformance Class #5

6 Write Polling Address Universal 17 Write Message 18 Write Tag, Descriptor and Date 19 Write Final Assembly Number 44 Write Primary Variable Units Common Practice 45 Trim Primary Variable Current DAC Zero 46 Trim Primary Variable Current DAC Gain 49 Write Primary Variable Sensor Serial Number 59 Write Number of Response Preambles

Page 78 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Command

Number

128 Set Alarm Select Transmitter Specific 129 Adjust for Product Build-up on Sensor 130 Read Failsafe Mode selection 131 Return Device Config. Info. 132 Write Variable Upper/Lower Limit Values 133 Read Variable Upper/Lower Limit Values 134 Write Keylock Value 135 Read Keylock Value 138 Write Simulation Timer and Value 139 Read Simulation Timer and Value 140 Write S.V. Units and Range Values 141 Read S.V. Unites and Range Values 144 Reset recorded PV min./max. values back to PV 145 Return recorded PV min./max. values 150 Write Analog Signalling Mode 151 Read Analog Signalling Mode 152 Write Digital Signalling Mode 153 Read Digital Signalling Mode 154 Write Analog Threshold Settings 155 Read Analog Threshold Settings 156 Write Digital Threshold Settings 157 Read Digital Threshold Settings 160 Write Delay Timers Analog Signalling 161 Read Delay Timers Analog Signalling 162 Write Delay Timers Digital Signalling 163 Read Delay Timers Digital Signalling

Description Usage

Appendix C

General Transmitter Information

Damping information

The SITRANS LC 500 transmitter implements damping on most of the transmitter variables. The damping setting may vary from 1 (shortest value) to 10000 (longest value).

Non-volatile Memory Data Storage

The flags byte of Command #0 referenced in the Universal Command Specification document will have Bit #1 (Command #39, EEPROM Control Required) set to 0, indicating that all data sent to the transmitter will be saved automatically in the non-volatile memory upon receipt of the Write or Set Command. Command #39, EEPROM Control, is not implemented.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 79

MultiDrop operation

The SITRANS LC 500 transmitter supports MultiDrop Operation.

Burst mode

The SITRANS LC 500 transmitter does not support Burst Mode.

Units conversions

The Transmitter Variable #0 Units are in pF and cannot be changed.

The Transmitter Variable #1 Values may be set to any Units and Value with Command #140. The Transmitter Variable Range Values may be read at any time with Command #141.

The value returned as Secondary Variable (S.V.) is the result of the following calculation:

TV1 = TV0 Dynamic Range Value in percent x ({TV#1}URV – {TV#1}LRV) + {TV#1}LRV.

This method provides a means of converting TV#0, which is always in pF, to alternative units (level or volume).

Additional Universal Command Specifications

For a document listing the additional Universal Command Specifications, please contact Technical Publications at techpubs@siemens-milltronics.com

Appendix C

Page 80 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Fault

Current-loop

Signal

Analog

status

2-state

Analog Signalling

Mode (menu 07)

Delay

Analog Fault/Failure (menu 08)

TV0 LSL

TV0 USL

(menu 03)

Upper

(menu 05)

Threshold

value

max/min

recorded

Fault

Delay

(menu 04)

reset

Lower

Threshold

TV0 damping

damping

TV0

TV0 LRV

TV0

TV0 URV

reset

(menu 06)

TV select

block

range

Upper

(menu 01)

TV1 LRV

TV1 URV

status

2-state

reset

Delay

Lower

Threshold

max/min

recorded

Fault

Delay

(menu 13)

(menu15)

Threshold

block

damping

TV1

block

range

State

Solid-

Output

Digital

Signalling

Mode

(menu 17)

(menu 14)

reset

(menu 16)

value

TV1 damping

Digital Fault/Failure (menu 18)

TV1 LSL

TV1 USL

Appendix D: Block Diagr am, and Correlation table, mA to %

cal high

circuit

cal low

sensor

Fault

sensor

SITRANS LC 500 Block Diagram

Correlation Table: 0% - 100% to 4-20 mA or 20-4 mA

Range 0 - 100 % Current in mA Range 100 - 0 %

04.0100

5 4.8 95 10 5.6 90 15 6.4 85 20 7.2 80 25 8.0 75 30 8.8 70 35 9.6 65 40 10.4 60 45 11.2 55 50 12.0 50 55 12.8 45 60 13.6 40 65 14.4 35 70 15.2 30 75 16.0 25 80 16.8 20 85 17.6 15 90 18.4 10 95 19.2 5

100 20.0 0

Appendix D

Page 82 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Appendix E: SITRANS LC 500, alternate versions and application details

Standard V ersion

Standard Version S-Series, Threaded

Note: All measurements are given in millimeters/inches.

S-Series: Threaded

ø160 (6.3”)

Insertion Length

+175 (6.9”)

Active Shield

Insertion

Length

Active

Probe Seal

(inactive)

ø16 (0.63”)

or ø24 (0.94”)

Length

40 (1.57”)

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 83

Appendix E

Standard Version S-Series, Threaded

Note: All measurements are given in millimeters/inches.

S-Series Cable Version

(with weight)

ø160 (6.3”)

120 (4.72” )

55 (2.17”)

Insertion Length

+/- Varies

Dimension

Vari es

See Order Instructions

PFA Insulation

ø9 (0.35”)

Transmitter Enclosure

Seal Gland

Threaded Process Connector

Tensile Weight

S-Series Cable Version

(with anchor)

Insertion

Length

125 (4.9”)

Insertion

Length

+175 (6.9”)

Features: Standard Version S-Series, Threaded

• single process seal

• suitable for most level, interface, or detection applications

• high temperature and pressure resistant

Appendix E

Page 84 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Standard Version S-Series, Welded and Machined Flanged Versions

Note: All measurements are given in millimeters/inches.

S-Series, Welded Flange S-Series, Machined Flange

TIG Weld

Insertion

Length

Probe Seal

(inactive)

ø16 (0.63”)

or ø24 (0.94”)

40 (1.57”)

Active Shield

Active Length

Insertion

Length

+185 (7.28”)

Probe Seal

(inactive)

ø16 (0.63”)

or ø24 (0.94”)

40 (1.57”)

Active Shield

Active

Length

Insertion

Length

Insertion

Length

+185 (7.28”)

Features: Standard Version S-Series, Flanged

• single process seal

• suitable for most level, interface, or detection applications

• high temperature and pressure resistant

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 85

Appendix E

Standard Version D-Series, Machined Flange

Note: All measurements are given in millimeters/inches.

D-Series DD-Series

ø160 (6.3”)

Trans mit ter

Enclosure

120 (4.72”) 120 (4.72”)

PTFE Lining

Probe

Probe Seal

ø16 (0.63”) or ø24 (0.94”)

Seal Glan d

(inactive)

Flange Process Connection

120 (4.72”)

Insertion

Length

Features: Standard Version DD-Series

• double process seal

• redundant safety (e.g. Phenol,

65 (2.56”)

Insertion

Length

Active Shield

Active Length

40 (1.57”)

holes

øk

øD

Features: Standard Version D-Series

• single process seal

• all wetted parts made of PFA (probe lining) or PTFE (flange face)

• all wetted parts made of PFA

• according to NACE requirements

• suitable for turbulent and toxic

ø160 (6.3”)

holes

Active Shield

Active Length

40 (1.57”)

øk

øD

Probe

Probe Seal

(inactive)

ø16 (0.63”) or ø24 (0.94”)

Phosgene applications, etc.)

(probe lining) or PTFE (flange face)

chemical applications

Transmitter

Seal Gland

Flange Process Connection

PTFE Lining

Enclosure

Appendix E

Page 86 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Note: All measurements are given in millimeters/inches.

SD-Series Probe/Thermal Isolator

ø160 (6.3”)

120 (4.72”)

40 (1.57”)

holes

øk

øD

Probe

Probe Seal

ø16 (0.63”) or ø24 (0.94”)

120 (4.72”)

Insertion

Length

Active

Shield

Active

Length

Features: Standard Version SD-Series

• double process seal

• redundant safety (e.g. Phenol, Phosgene applications, etc.)

• all wetted parts made of PFA/ PTFE

• according to NACE requirements

• suitable for turbulent and toxic chemical applications

Transmitter

Enclosure

Seal Gland

Flange Process Connection

ø160 (6.3”)

120 (4.72”)

øk

øD

Thermal Isolator

Probe

Probe Seal

ø16 (0.63”) or ø24 (0.94”)

Dependent o n

extension length

Active Shield

Insertion

Length

Active Length

40 (1.57”)

holes

Features: Standard Version, Probe/ Thermal Isolator

• thermal isolator (to prevent temperature at the electronics

reaching higher than 85

Trans mit ter

Enclosure

Seal Gland

Flange Process Connection

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 87

Appendix E

Interface Version

Designed specifically for interface level where a long distance active shield portion of the electrode is required (up to 35 meters) before the measurement portion of the electrode begins. Common in large storage tanks for oil where the bottom of the tank invariably has a layer of water below the oil. Often, when measurement spans as much as 5.5 meters (for the water), up to 35 meters of flexible bellows cable are used.

Interface Version, threaded (optional sanitary and flanged)

ø 160 mm

transmitter enclosure

(6.3”)

seal gland

process connection: flange or threaded mounting

flexible tube

probe

ø 16 mm (0.63”) or ø 24 mm (0.94”)

Active Shield

ø16 mm=2 m

ø24 mm=5.5 m

100 mm (3.9”)

inactive tip

insertion length 35 m (115 ft) max.

active

length

185 mm (7.28”)

dependent on extension length

adjustable extension

Process Connection Size

• threaded version: ¾", 1", 1½", 2" NPT, BSPT, or JIS

• sanitary version: on customer request

• flanged version: on customer request

Options

• thermal isolator

• stilling well

Aluminum Enclosure

• NEMA 4 / Type 4 / IP65

Conduit Entry:

•½" NPT (2x)

Appendix E

Page 88 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Sanitary Version

The hygienic design includes threaded and tri-clamp versions for use in the food and pharmaceutical industry.

Sanitary Versions, threaded and tri-clamp

Note: All measurements are given in millimeters/inches.

Sanitary Thread Coupling

ø160 (6.3”)

118 (4.65”)

Seal Gland

Active Shield

Insertion

Length

Active

Length

40 (1.57”)

Features: Sanitary Version, Tri-Clamp

Probe

Probe Seal

(inactive)

ø16 (0.63”) or ø24 (0.94”)

IDF Nut

Trans mit ter Enclosure

Sanitary Tri-Clamp

Probe Seal

(inactive)

ø16 (0.63”) or

ø24 (0.94”)

Seal Gla nd Tri- cl amp Connection

40 (1.57”)

Active Shield

Active Length

Insertion

Length

Insertion Length + 175 (6.9”)

• maximum active length 5.5 m (18 ft)

• minimum active length 50 mm (2”)

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 89

Appendix E

Flanges

Flange Standards

Notes:

• All measurements are given in mm

• One (1) inch = 25.4 mm

• For details, see drawings, technical data, and measuring probe details on pages 83 to 89.

øL

øK (n holes)

øD

Appendix E

Page 90 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Applications Examples

Generic Application Calculations

The capacitance expected in a cylindrical tank with a probe centrally mounted is estimated using the following formula:

24 L×

--------------------------

C ε

Log D d⁄()

(L in meters) or (L in feet)

pF=

Where:

C = capacitance value in pF

= relative dielectric constant

L = active measurement length D = internal tank diameter d = electrode diameter 24 = a K constant for dimensions in meters

7.32= a K constant for dimensions in feet or inches

= 1 (air)

= 2 (oil)

Examples (using dimensions above):

Capacitance in air:

Dimensions in meters:

air

7.32 L×

--------------------------

C ε

Log D d⁄()

24 0.95×

-----------------------------------

Log 1 0.016⁄()

pF=

SITRANS LC 500

D = 1.0 m

(3.28’)

pF 12.7 pF==

d = 16 mm

(0.05’)

0.25 m (0.82’)

L = 0.95 m

(3.12’)

7.32 0.82×

Dimensions in feet:

air

--------------------------------

air

Log 10.06⁄()

pF 12.7 pF==

Capacitance in oil:

If the same vessel is filled with oil, relative dielectric constant for oil (2) replaces the relative dielectric constant for air (1), and the resulting calculation is:

24 0.95×

oil

The initial capacitance value at 0% (probe in air) is 12.7 pF, and the capacitance value for 100% (tank filled with oil) is 25.4 pF.

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 91

-----------------------------------

Log 1 0.016⁄()

oil

7.32 3.12×

----------------------------------------

Log 3.28 0.05⁄()

oil

pF 25.4 pF==

(dimensions in meters)

(dimensions in feet)

Appendix E

After calibration:

12.7 pF ≅ 0% ≅ 4 mA or 20 mA

25.4 pF ≅ 100% ≅ 20 mA or 4 mA

Larger tank, dimensions in feet:

7.32 4.5×

air

oil

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:

16.6 pF ≅ 0% ≅ 4 mA or 20 mA

33.2 pF ≅ 100% ≅ 20 mA or 4 mA

-----------------------------------

air

Log 60 0.63⁄()

7.32 4.5×

-----------------------------------

oil

Log 60 0.63⁄()

pF 16.6pF==

pF 33.2 pF==

SITRANS LC

500

d = 0.63”

60”

(5.0ft)

6” (0.5ft)

L = 54”

(4.5ft)

Appendix E

Page 92 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Application: level indicator and solid-state switch output

The loop current provides:

• a reading proportional to level, within the 0 - 100% range, at menu 00 or 10 on the device, or at a remote indicator

• an out-of-range signal ooL alternating with PV if the level is above URV or below LRV

The solid-state switch is activated at Upper Threshold Setting and deactivated at Lower Threshold Setting. In the diagram below, it is used to activate a pump via an auxiliary power circuit.

• The activation and deactivation can be modified by Upper and/or Lower Threshold delays (menus 13 and 14).

• The reading can be stabilized if necessary by applying Damping (menu 0A): the update value for Damping is controlled by menu 09.

Example: The level is to be held between 90% and 8%.

Indicator: primary variable viewed at menus 0 0 or 01;

units or% selected in menu 01

0-100%

current loop connection

Active Shield section

solidstate output

auxiliary power

pump power

75.8 pF

14.3 pF

solid-state switch output: selected at menu 17 and controlled by menus 13 to 18.

(menu 0C) USL

(menu 0F) URV = 100%

Upper Threshold Setting = 90% menu 15 (activation hysteresis)

menu 16 (deactivation hysteresis)

Lower Threshold Setting = 8%

(menu 0E) LRV = 0%

(menu 0B) LSL

Device settings: (The device is first restored to factory settings before being commissioned) TV0 selected: Transmitter Variable 0 is PV Menu 01 reads Pv = 0 Lower Range Value (0% of range) is set to 14.3 Menu 0E reads 14.30 Upper Range Value (100% of range) is set to 75.8. Menu 0F reads 75.80 Current loop is in analog mode, with both buttons pressed Menu 07 reads C:An Solid-state switch enabled, contact closed selected Menu 17 reads S:cc Activation hysteresis is set to 90. Menu 15 reads 90.0 Deactivation hysteresis is set to 8. Menu 16 reads 08.0.

When the level reaches 90%, the solid-state output is closed and the pump is started via the auxiliary circuit. When the level drops to 8% the solid-state output is opened, the auxiliary circuit is deactivated, and the pump stops.

S:cc appears while the button is pressed. See menu 17 on page 70 for more details.

Appendix E

7ML19985GE01 SITRANS LC 500 – INSTRUCTION MANUAL Page 93

Application: Analog fault signalling (2-state output)

In 2-state mode, the loop current signals whether the probe is covered or uncovered, and the continuous level measurement is unavailable.

2-state mode provides:

• a 4 mA or 20 mA output to menu 07, when the level reaches one of the threshold

settings

• a 3.6 or 22 mA output to menu 07 (if 2-state fault signalling is enabled at menu

08) when the process level exceeds one of the limit settings (menu 0B and 0C).

The above settings can be modified:

• The response time when thresholds are reached can be modified by Upper and/

or Lower Threshold delays (menus 03 and 04).

• The mA reading can be stabilized if necessary by applying Damping (menu 0A):

the increment value is controlled at menu 09.

Example:

Current activated relay module

current loop connection

2-state output (menu 07)

Active Shield section

(menu 0C) USL

(menu 0F) URV = 100%

Upper Threshold Level = 90%

menu 05 (activation hysteresis)

83.5pF

75.8 pF

menu 06 (deactivation hysteresis)

Lower Threshold Level = 8%

Menu 0E LRV = 0%

Menu 0B LSL

14.3 pF

7.3 pF

2-state fault signalling enabled (F: Hi selected Menu 08 reads F:Hi Activation hysteresis is set to 90 Menu 05 reads 90.0 Deactivation hysteresis is set to 8 Menu 16 reads 08.0.

Appendix E

F: Hi appears while the button is pressed. See

Analog Fault Signalling (2-state)

page 66 for more details.

Page 94 SITRANS LC 500 – INSTRUCTION MANUAL 7ML19985GE01

Siemens LC 500, Treadmill Sitrans User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SITRANS LC 500

Applications

Safety Notes

Safety marking symbols

The Manual

Abbreviations and Identifications

Technical Specifications: SITRANS LC 500

Power

Environmental

Performance

Outputs

User Interface

Communications

Electrodes

Wetted Parts

Enclosure (electronic)

Weight

Process Conditions

Approvals

SITRANS LC 500: Transmitter

Operating Principles

The SITRANS LC 500 variable frequency oscillator

Capacitance measurement in a cylindrical metal tank

The SITRANS LC 500 electrode

Application: SITRANS LC 500

Level Measurement

Interface Measurement

Switch action

Fault Signalling

SITRANS LC 500: Probe Configuration

SITRANS LC 500 Electrode (Probe) Char acteristics

Electrode Assembly

Process Connections

Seal Types

Process Connection and Seal Configur ation of SITRANS LC 500

Pressure and Temperature Considerations

Non-standard applications

SITRANS LC 500: Installation

Handling Electrodes

Mounting Instructions

Protection for solid-state switch

Process Cautions

SITRANS LC 500: Standard Level Version

Interconnection: SITRANS LC 500

Wiring

Supply

Cable

Selecting the correct instrumentation cable

Terminals

Connecting SITRANS LC 500

Connection Diagram

Protection for solid-state switch

Grounding instructions

Grounding Examples: SITRANS LC 500

System Grounding (referencing)

Metal Tanks

Non-Conductive Tanks

Safety Grounding

Example 1

Example 2

Example 3

Example 4

Communications

Typical PLC configuration with HART

Diagnostics

Applications for Solid-state Output

Switch Protection (Diode)

Factory Settings

Settings:

The SITRANS LC 500 User Interface

The LCD (display)

How to access the data:

Menu Levels 00 to 0F and 10 to 1F

The rotary switch

The push-buttons

Access to a menu item: