51-650 Echotel SIL Safety Manual

Table of Contents

SIL Safety Manual for Model 961/962....................................1

Echotel Model 961/962 Ultrasonic Level Switches...........1

Application.......................................................................1

Benefits ............................................................................1

1.0 Introduction ...................................................................3

1.1 Product Description ..................................................3

1.2 Theory of Operation.................................................3

1.2.1 Transducer Design..........................................4

1.2.2 Transducer Materials ......................................4

1.3 Determining Safety Integrity Level (SIL) ..................4

2.0 Applicable Models ..........................................................5

3.0 Mean Time To Repair (MTTR).....................................5

4.0 Supplementary Documentation......................................5

5.0 Instructions ....................................................................6

5.1 Systematic Limitations ..............................................6

5.1.1 Application Locations.....................................6

5.1.2 Operating Temperature ..................................6

5.1.3 Operating Pressure .........................................6

5.1.4 Environmental................................................6

5.2 Skill Level of Personnel .............................................6

5.3 Necessary Tools .........................................................7

5.4 Storage ......................................................................7

5.5 Installation ................................................................7

5.5.1 Hygienic-Specific Installation .........................8

5.5.2 Pump-Specific Installation..............................8

5.6 Configuration ...........................................................8

5.6.1 Time-delay Potentiometer ..............................8

5.6.2 Level Test Push Button...................................8

5.6.3 Malfunction Test Push Button........................9

5.6.4 High/Low DIP Switch ...................................9

5.6.5 Independent/Joint DIP Switch .......................9

5.6.6 Loop Test Push Button...................................9

5.6.7 Fault Test Push Button .................................10

5.6.8 22/3.6 DIP Switch .......................................10

5.6.9 PC/LC DIP Switch ......................................10

5.7 Site Acceptance Testing ...........................................10

5.8 Maintenance ............................................................10

5.8.1 Diagnostics...................................................11

5.8.2 Troubleshooting ...........................................11

6.0 Appendices ...................................................................12

6.1 SIL Declaration of Conformity ...............................12

6.2 FMEDA Report Management Summary ................13

6.2.1 Model 961 Loop-Powered Level Switch .......13

6.2.2 Model 961 AC/DC Ultrasonic

Level Switch with Relay Output...................13

6.2.3 Model 962 Loop-Powered Ultrasonic

Level Switches ..............................................14

6.2.4 Model 962 AC/DC Ultrasonic

Level Switch with Relay Output...................14

6.3 Report - Lifetime of Critical Components ..............15

Echotel Model 961/962 Ultrasonic Level Switches