K-Tec MT2000 manual 9.3APPENDIX C Linearization, To access the linearization table

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