ABB LWT300 Series User Manual page 4

Setting data filtering parameters.....................51
Selecting maximum level rate ......................51
Setting up a median filter ..............................51
Setting up a damping period ...................... 52
Setting amplitude threshold ....................... 52
Setting process parameters.............................. 52
Setting process safety parameters ........... 52
Managing lost echoes.................................... 54
Preventing unnecessary alarms .................. 54
Setting up linearization ...................................... 54
Understanding linearization ........................ 54
Accessing the linearization function ......... 56
Setting linearization input unit ................... 56
Setting linearization output unit ................ 56
Setting maximum level, volume or flow
value .................................................................... 56
Setting vessel parameters ........................... 56
Generating a linearization table
automatically .................................................... 57
Setting up linearization points ................... 57
Saving the linearization table ...................... 58
Enabling the linearization function ........... 58
Managing saved linearization tables ........ 58
Managing device setups ..................................... 59
Saving default user setup ............................. 59
Resetting to default user setup .................. 59
Resetting to factory default ........................ 59
Configuring the LWT300 with a computer ...60
7 Setting calibration parameters
Changing the empty/zero value .......................64
Changing empty/zero value in hardware .64
Changing the full/span value ............................ 65
Changing full/span value in hardware ...... 65
Adding a level offset ............................................ 65
Adding a sensor offset ........................................ 65
8 Configuring communications
Toggling communication modes ..................... 67
Toggling via HMI .............................................. 67
Toggling via hardware ................................... 68
Configuring Modbus communication ............ 70
Setting the Modbus network address ...... 70
Selecting the communication speed ........ 70
Selecting the parity status ........................... 70
Selecting the stop bit .................................... 70
Setting the response delay .......................... 70
Selecting the register base number .......... 70
Setting the swap mode ..................................71
iv
User Guide
Configuring HART communication ..................71
Setting the HART network address ............71
Locating an instrument with tags ..............71
Browsing communication info .....................71
9 Maintenance and troubleshooting
Diagnosing problems .......................................... 73
Browsing the diagnostics history .............. 75
Clearing the diagnostic history .................. 75
Event codes and recommendations .......... 76
Masking classes of events .............................77
Diagnosing from a waveform ............................ 78
Introducing the waveform display ............. 78
Accessing the waveform display ................ 79
Selecting a level/interface echo ................. 79
Recording a waveform ................................... 79
Performing simulations and tests ...................80
Performing standard simulations ..............80
Obtaining device status data ............................80
Probe length .....................................................80
Electronics temperature ............................... 81
Total run time ................................................... 81
Performing a self-test ......................................... 81
Setting distance calibration parameters ...... 81
Accessing device information ........................... 82
A LCD menu tree ..............................
B Modbus registers ..........................
Holding registers ............................................... B89
Input registers .................................................... B90
C Gas phase compensation static
factors .........................................
Dielectric constant of steam .......................... C93
Example with steam: resulting error in the gas
phase ..................................................................... C93
D Dielectric constants chart .............
E PT100 temperature sensors ...........
A83
B89
C93
D95
E99