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6

51-650 Model 961/962 Echotel SIL Safety Manual

5.2

Skill Level of Personnel

Personnel following the procedures of this safety manual
should have technical expertise equal to or greater than that
of a qualified instrument technician.

5.3

Necessary Tools

No special equipment or tools are required to install Echotel
Model 961/962 ultrasonic level switch. The following items
are recommended:

• Wrenches, flange gaskets, and flange bolting appropriate for

process connection(s)

• Screwdrivers and assorted tools for making conduit and

electrical connections

• Digital multimeter or DVM for troubleshooting

5.4

Installation

The Model 961 single point switch may be used for high or
low level alarm, overfill protection, or seal pot level and
pump protection. Model 961 can be mounted vertically or
horizontally in vessels, bridles, or pipes.

The Model 962 dual point switch may be used to measure
high/low, high/high, or low/low levels. It can be used as a
level controller or to control pumps in an auto-fill or auto-
empty mode. Model 962 must be top mounted.

Refer Figures 2 –5 to the

Echotel Model 961/962 Ultrasonic

Switches Installation and Operating Manual

(Bulletin

51.646) for the proper installation instructions.

Bottom View

Figure 4

Horizontal Mounting

Bottom View

Figure 5

Nozzle Mounting

Use wrench on flats

Process

connection

Figure 3

Vertical Mounting

Pump

Protection

Fill Line

Dual Point Alarm

High Alarm

Low Alarm

Figure 2

Typical Mounting Orientations

«
...
4
5
6
7
8
...
»

Содержание Echotel 962

Страница 1: ...uid level measurement Adjustable time delay for turbulent aerated liquids Reliable liquid level measurement independent of changes in media density conductivity or temperature Two wire mA current shift and relay output options Relay output or mA current shift with separate malfunction indication Integral or remote mount electronics Pulsed signal technology Extensive FM CSA ATEX and IEC explosion p...

Страница 2: ...ion 7 5 4 2 Pump specific Installation 7 5 5 Configuration 7 5 5 1 Time delay Potentiometer 7 5 5 2 High Low DIP Switch 7 5 5 3 Malfunction Test Push Button 8 5 5 4 High Low DIP Switch 8 5 5 5 Independent Joint DIP Switch 8 5 5 6 Loop Test Push Button 8 5 5 7 Fault Test Push Button 8 5 5 8 22 3 6 DIP Switch 8 5 6 Site Acceptance Testing 9 5 7 Maintenance 9 5 7 1 Diagnostics 9 5 7 2 Troubleshooting...

Страница 3: ...ety of process media and application conditions The transducer uses a pair of piezoelectric crystals that are encapsulated in epoxy at the tip of the transducer The crys tals are made of a ceramic material that vibrates at a given frequency when subjected to an applied voltage The trans mit crystal converts the applied voltage from the electronics into an ultrasonic signal When liquid is present i...

Страница 4: ...hitecture Constraint The architecture constraint was determined using the 2H approach according to 7 4 4 3 of IEC 61508 2 2010 edi tion The Model 961 962 meets the hardware architecture constraints for up to SIL 2 at HFT 0 or SIL 3 at HFT 1 when the failure rates listed in the FMEDA report are used 2 0 Applicable Models This manual is applicable to the following models of the Echotel ultrasonic le...

Страница 5: ...ocations The Model 961 962 ultrasonic level switch should be located for easy access for service configuration and monitoring There should be sufficient headroom to allow installation and removal of the unit Special precautions should be made to prevent exposure to corrosive atmosphere excessive vibration shock or physical damage 5 1 2 Operating Temperature The ambient temperature range for the 96...

Страница 6: ... 961 single point switch may be used for high or low level alarm overfill protection or seal pot level and pump protection Model 961 can be mounted vertically or horizontally in vessels bridles or pipes The Model 962 dual point switch may be used to measure high low high high or low low levels It can be used as a level controller or to control pumps in an auto fill or auto empty mode Model 962 mus...

Страница 7: ...s The tip sensitive lower gap allows liquid levels to be pumped down to within 1 4 from the bottom of the vessel The rigidity of the flow through upper gap allows the Model 962 to be used even when sumps experience severe turbulence from vessel fill lines 5 5 Configuration Refer to Section 2 5 in the Echotel Model 961 962 Ultrasonic Level Switches Installation and Operating Manual Bulletin 51 646 ...

Страница 8: ...actory set I position the SPDT and DPDT relays act independent of each other In the J position both the SPDT and DPDT relays will de engage when a fault is detected The I J DIP switch is an option for the Model 961 in line powered configuration only 5 5 6 Loop Test Push Button The loop test push button is used to manually test the loop current output For Model 961 pressing the loop test push butto...

Страница 9: ...connection wiring Check wiring inside the housing to make sure that all wires are secure in their respective terminal blocks Make sure that all the terminal block screws are fully tightened If all wires are secure then contact the factory Replace transducer if needed Refer to Section 3 8 of the Installation and Operating Manual for proper replacement part numbers 2 flashes Indicates a problem with...

Страница 10: ... entire system be tested at regular time intervals shown as TI in the appropriate standards The necessary time interval is deter mined by what is required to achieve the appropriate SIL level for PFDavg NOTE It is the responsibility of the owner operator to select the type of inspection and the time period for these tests 6 1 3 Recording Results Results of the Proof Test should be recorded for fut...

Страница 11: ...irm proper operation after the delay c Press FAULT TEST push button and confirm FAULT LED lights Loop current 22mA or 3 6mA based on 22 3 6 switch Release button d Change the 22 3 6 DIP switch position Press FAULT TEST push button and confirm FAULT LED lights Loop current 22mA or 3 6mA as expected Release push button Return 22 3 6 switch to original setting e Adjust the Time Delay Pot to maximum d...

Страница 12: ...is suggested to service the transducer more frequently b Clean the ultrasonic transducer especially in the area of the sensor GAP c Perform a bench test per the steps of section 4 When possible it is best to use the actual process material because materal properties affect the ultrasonic performance Confirm proper unit operation WET DRY GAP condition 8mA LED or 16mA LED is lighted Loop current 8mA...

Страница 13: ...D and Relay contacts change Delay is set by Time Delay Pot so delay may be as long as 10 seconds Change HI LOW DIP switch back to original setting and confirm proper operation after the delay c Press MALF TEST push button and confirm FAULT LED lights MALF and WET LEDs goes OFF and MALF Relay contacts go to the de energized state Release button Confirm unit returns to normal operation d Adjust the ...

Страница 14: ...ing is evident it is suggested to service the transducer more frequently b Clean the ultrasonic transducer especially in the area of the sensor GAP c Perform a bench test per the steps of section 4 When possible it is best to use the actual process material because materal properties affect the ultrasonic performance Confirm proper unit operation WET DRY GAP condition LEDs and Relay contacts state...

Страница 15: ...A Release the button and unit returns to proper operation b Change HI LOW DIP switch position Confirm both LED Loop Current change state 8mA 16mA or 16mA 8mA Note that 12mA will stay at 12mA with the switch change Observe the time delay from change of DIP switch until LED and Loop current change Delay is set by Time Delay Pot so delay may be as long as 12 seconds Press LOOP TEST push button and co...

Страница 16: ...lighted Loop current 8mA 1mA or 16mA 1 mA d If unit fails the tests of steps 4a 4b or 4c proceed to step 5 e Adjust the Time Delay Pot to the original setting Use HI LOW DIP switch as described in step 2e to confirm that delay is returned to original setting f Proceed to step 6 5 If the unit under test fails to respond to process level changes remove the unit from the process and bench test a If t...

Страница 17: ...e as long as 10 seconds Change HI LOW DIP switch back to origi nal setting and confirm proper operation after the delay c Press MALF TEST push button and confirm FAULT LED lights All other LEDs goes OFF and all Relay contacts go to the de energized state Release button Confirm unit returns to normal operation d Adjust the Time Delay Pot to maximum delay fully clock wise up to 20 turns Change HI LO...

Страница 18: ...rform a bench test per the steps of section 4 When possible it is best to use the actual process material because materal properties affect the ultrasonic performance Confirm proper unit operation WET DRY GAP condition LEDs and Relay contacts state d If unit passes the tests of steps 5c return to the process installation and repeat the tests of step 4 e If the unit fails re test in the process it ...

Страница 19: ...T 0 SIL 3 HFT 1 Device Type B B B B λsd 263 FITS 15 FITS 451 FITS 24 FITS λsu 199 FITS 178 FITS 226 FITS 186 FITS λdd 28 FITS 275 FITS 39 FITS 466 FITS λdu 55 FITS 76 FITS 60 FITS 96 FITS Table 6 Relay Output Version Product Model 961 Dry is Safe Model 961 Wet is Safe Model 962 Dry is Safe Model 962 Wet is Safe SIL Architechture Constraint 2H SIL 2 HFT 0 SIL 3 HFT 1 SIL 2 HFT 0 SIL 3 HFT 1 SIL 2 H...

Страница 20: ...20 51 650 Model 961 962 Echotel SIL Safety Manual 7 2 FMEDA Report ...

Страница 21: ...21 51 650 Model 961 962 Echotel SIL Safety Manual 7 2 1 FMEDA Report exida Management Summary ...

Страница 22: ...22 51 650 Model 961 962 Echotel SIL Safety Manual ...

Страница 23: ...e regular inspection should show that all com ponents are clean and free from damage The limiting factors with regard to the useful lifetime of the system are the aluminum electrolytic capacitors Therefore the useful is predicted to be 10 years For high demand mode applications the useful lifetime of the relays is limited by the number of cycles The useful life time of the relay is 100 000 full sc...

Страница 24: ...ing information 1 Company Name 2 Description of Material 3 Serial Number 4 Reason for Return 5 Application Any unit that was used in a process must be properly cleaned in accordance with OSHA standards before it is returned to the factory A Material Safety Data Sheet MSDS must accompany material that was used in any media All shipments returned to the factory must be by prepaid transportation All ...

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