K-Tec MT2000 manual Appendix C Linearization, To access the linearization table

Page 26

9.3APPENDIX C: Linearization

The MT2000’s multi-point linearization system allows improved measurement accuracy along the length of the probe. In particular, this feature can be used to correct non-linearity, which can be seen, typically close to the top and close to the bottom of the sensing probe. In most application, linearization is not required.

The MT2000 linearization uses a table of points set up by the user. For every point, there is an input measurement, provided by the instrument, and an output measurement, provided by the user. As the detected level travels the probe length, the measurement output is calculated from each segment of the table. The table points are used to map sensor measurement to sensor output.

To access the linearization table:

-Access the CAL menu and use ‘UP ARROW’ to scroll to LIN TABL, then press “Select”.

To clear the linearization table

-Access the linearization table and scroll up to LIN RSET, then press “Select” to clear the table.

Setting up Linearization Table Points:

Probe Length

Table Points

 

 

24” Probe

0.1”, 0.5”,1”,1.5”,2.0”,3.0”,4.0’,6”,12.0”,18”,19”,20”,21”,23”

 

 

48” Probe

0.1”, 1”,2”, 3”,4, 6”,12”,24”,36”,42”,43”,44”,45”,46”,47”

 

 

120” Probe

.5”,3”,6”,12”,24”,36”,48”,60”,72”,84”,96”,108”,114”,117”,119”

 

 

Notes on Linearization Table Usage:

•A point may be removed (“zeroed out”) from the table by entering “0” for its value. If a point is zeroed out, it is ignored when measurement output is calculated.

•For all points in the table, all points must be increasing in measurement, with the exception of zeroed points; therefore, it is recommended that when setting up the table, points should be set up sequentially from lowest to highest measurement.

•It is also recommended to leave several “zeroed” points between active linearization points for later use if needed without having to rebuild the entire table.

•A zeroed point may be set again, provided it is increasing with respect to the previous points in the table list.

Saving/Loading a Linearization Table:

Because setting up the linearization table can be a time-consuming process, it is recommended to save a copy of the table, to allow reloading of the table from a previous save.

To save the current linearization table:

Under the CAL menu:

Scroll to LIN TABL, then press “Select”.

Scroll up to LIN SAVE, then press “Select”.

To load a saved linearization table:

Under the CAL menu:

Scroll to LIN TABL, then press “Select”.

Scroll up to LIN LOAD, then press “Select”.

26

MT2000-0200-01 Rev f (10-2007) DCN0160

Page 25 Page 27
Image 26
Page 25 Page 27
Contents Guided Wave Radar Level Transmitter Table of Contents List of Figures AppendicesIntroduction Storage Information Ambient TemperatureOverview Measurement cycle consists of the followingDirect Reflect Mode standard cont’d Ultra Low Dielectric ULD Measure MethodInstallation Mounting RequirementsMT2000 Guided Wave Radar Guidelines Factory Default ConfigurationShortening of Probe URV = Probe Length LRV = 0 in. / 0 mmCommissioning WiringQuickstart Procedure MT2000 Guided Wave Radar Guidelines cont’dSetting the 4mA and 20 mA Points Using the Pushbutton Menu Quickstart Procedure cont’dVerify Proper Power-Up LCD Menu Operation Calibration MenuDetailed Configuration Parameters Direct Mode Blanking Menu Threshold Level Parameter THV and Gain Setting GSL1O Threshold Level Parameter THV and Gain Setting GS cont’dAdvanced Parameter Settings Advanced Parameter Settings cont’d KO & KGDC = I + H L / H2 Ultra Low Dielectric ULD Mode Configuration= H * Sqrt DC H + L Setting the DAC trim Ultra Low Dielectric ULD Mode Configuration cont’dAdvanced Output Configuration DAC TrimFigure6 4mA & 20mA Calibration Using Actual Level Input Bench Calibration of the 4mA & 20mA PointsReversing The Output Action Using Actual Level Input Jumper Switch SettingsValid Current Loop Outputs Troubleshooting InformationPossible Symptoms Honeywell DE Output Option Possible Symptoms cont’dElectronics Module Replacement Interoperability and Conformance ClassHart Communicator Hart Protocol Interface OptionOperating Modes CompatibilityGlossary of Terms LRVAppendices Appendix a Sensor TrimConfiguration 2 Hidden Menu END CFG MenuTMP Appendix C Linearization To access the linearization tableSetting up Linearization Table Points To clear the linearization tableAppendix D Interface Applications MT2000 InterfacePrerequisites Use and setup of the oscilloscope for the MT2000Scope Settings Channel a Channel BAppendix F CE Certificate of Conformity Appendix G Exida Certificate MT2000-0200-1 Rev f 10-2007 DCN0160 MT2000-0200-01 Rev f 10-2007 DCN0160 MT2000-0200-1 Rev f 10-2007 DCN0160 10a Appendix I Mounting Configurations3a, 3b 10bAppendix J Warranty Statement Year Warranty for
Top Page Image Contents