Emerson Process Management MSL600 manual Determination of tank depth, Transducer self-cleaning

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Installation, Operation & Maintenance Manual

IP262/Z0, Rev. AB

February 2012

MSL600

5.2 Determination of tank depth

The ultimate blanket level measurement accuracy depends upon the accuracy of the value entered for the tank depth. It is always recommended that this be determined for every installation by the user using a measuring rod or similar. Alternatively, the user can obtain a workable estimate of the tank depth by adjusting the tank depth value Off line using the HMI and positioning the bottom echo at the bottom of the profile display.

This only works if a bottom echo is visible and the user must be sure that the echo he is positioning does actually correspond to the tank bottom. To do this, follow the procedure below:

1.From the normal display, press ￿.

2.The main menu will appear on the upper right of the display.

3.Highlight the Go Off line menu option and press ￿. The padlock will open.

4.Press Esc to return to the main menu.

5.Use the ￿ and ￿ keys highlight the INSTALLATION menu option and press ￿.

6.Highlight the Tank depth option and press ￿.

7.To edit the depth press ￿.

8.Use the ￿ and ￿ keys to increment and decrement the highlighted digit.

9.Use the ￿ and ￿ keys to move from one digit to the next.

10.When editing has finished press ￿ to save the value.

11.The large echo (in most cases this represents the bottom of the tank that the transducer is positioned over) on the lower left display will move.

12.Repeat steps 7 to 11 as necessary.

13.When this echo appears at the bottom of the display the tank depth is set.

14.ESC to return to main menu.

Please note that to avoid confusing echoes this procedure should be carried out when there is no significant sludge blanket in the tank.

5.3 Transducer self-cleaning

The transducer self-cleaning is pre-programmed for optimal performance. However, the cleaning cycle can be changed by following the procedure set out below.

In order to access the transducer cleaning parameters follow the following programming sequence:

1.Press ￿ to access the main menu.

2.The main menu will appear on the upper right of the display.

3.Highlight the Go Off line menu option and press ￿. The padlock will open.

4.Press Esc to return to the main menu.

5.Use the ￿ and ￿ keys to highlight the SETUP menu option and press ￿.

6.Highlight the DUTY (mode) menu option and press ￿.

7.Highlight the CLEANING menu option and press ￿.

8.Highlight the Start On menu option and press ￿.

9.Use the ￿ and ￿ keys to highlight the required option and press ￿.

Three options are available;

Auto Clean - This is the default option and means that the MSL600 will automatically carry out a cleaning cycle for 10 seconds on the hour every hour.

Manual 5s - This allows the user to manually activate a 5 second cleaning cycle at any time after which the cycle returns to its previous setting (note, the unit must be on line to carry out this process).

Off - The unit will not perform any cleaning cycles.

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Contents MSL600 Installation, Operation & Maintenance ManualContents MSL600 12.2 12.1Before Operating this Device the Manual should be Read Fully About this Manual About the MSL600Self-cleaning Important MSL600 featuresHuman Machine Interface Mounting bracketLocation As a systemApplication planning Circular clarifiersRotating bridge Static bridge Rectangular clarifiersPreliminary checks InstallationLocation Mounting bracket attachmentAttaching the MSL600 Installing the bracket on the bridgeMSL600 mounting Transducer connections Power and other electrical connectionsExternal connection terminals Cable extension Display ProgrammingKeypad and Menu Navigation Contrast viewing angle controlOn-line/Off-line SecurityTank depth Bottom reference Quick start parametersDetermination of tank depth Transducer self-cleaningMA current output parameters Current output adjustAlarm Relay parametersTransducer out-of-water time Digital input Menu structure Detailed operationMain menu item Menu Item DescriptionDirect access Parameter editingScrolling Installation parameters Application parametersMain menu parameters Description P240 De-sludge parametersStart On P250 Stop On P251Start Time P253 Stop If P252Interval P254 Max Retries P257MA output parameters Cleaning parameters4 0/4-20mA P403 Alarm Action P402Relay RL1 mode P410 and RL2 mode P420 Alarm mode relay RL1 and RL2 parameters P540 toTable B Relay Parameter numbers Set point mode relay RL1 and RL2 Fault mode relay RL1 and RL2 parameters P560 to P570De-sludge mode relay RL1 and RL2 On mode relay RL1 and RL2Relay On and Off Points Display parameters HMIRelay overrides Min ON, Max ON, and Min OFF HMI upper, middle, and lower display optionsBacklight On/Off P575 Clear TrendClear Profile Logging parameters Low Mem Alarm P593Log Interval P590 Fast log P591Engineering parameters Parameter values Default Min Max 128 10241 Alg. Select P620 Common algorithm parameters P621 to P629Parameter values Default Min Max 9999 Upr S-nat Temp P625 Parameter values Default Min Max 100 Top Blanking P623Default Min Max +85 105 185 Noise Alrm Lev P622Default metric m/s Default Min Max +85 185 SoS constant P627Lwr S-nat Temp P626 Bottom Blanking P628Municipal 1 parameters P630 to P637 Parameter values Default Min Max Lost Echo Rnge P633Significance P630 Sharp Echo Reject P631Parameter values Default Min Max Lost Echo Time P637 Parameter values Default Min Max Dirty Mult P636Parameter values Default Min Max 255 Noise SD Mult P635Municipal 2 parameter P640 Parameter values Default Min Max 100Threshld Offset P640 Threshold level = Threshld Offset P640 + Noise Level D834System parameters Load Defaults functionAuto Cycle function Display testComms parameters P710 to P716 Settings parameters P730 to P737 and Base Units selectionFixed parameters D750 to D753 PIN parameter P740Readings parameters D800 to D834 Readings and diagnostics parametersDiagnostics parameters D835 to D852 Speed of Sound D850 Max Xdr Temp D851Min Xdr Temp D852 Troubleshooting MaintenanceTechnical reference Transmit pulse and echo processingSub-menu Level Parameter Title Par No Main Menu Option Programming chartProgramming chart … Direct 12.1 MSL600 SpecificationModel No OutputsWeight Additional specification notes12.2 MSL603 transducer MSL600 Bridge mounted unit Dimensional drawingsMSL600 and MSL603 assembly MSL603 transducer cable extension Parts requiredFitting instructions MSL600 MSL600 Emerson Process Management Rosemount Measurement