Max Machinery 121 INDICATOR - Manual (Page 42)

Pg 42 121-000-350 © 2001 Max Machinery, Inc.
7.6 Linearization Table
7.6.1 Linearization Table General Information
The Linearization Table is used when the flow input device gives a nonlinear input signal. The
unit uses up to 16 different points, as entered by the operator, to form a curve for linearizing
the input signal.
Notes:
1) A minimum of three points must be set up.
2) If "0" is entered for the frequency of any point other than point 1, the Flow Computer
assumes there are no more points above the points that preceded them. The display will
advance to the next setup prompt. Extrapolation is taken from the last two nonzero points.
3) If the input frequency is above the highest or below the lowest frequency programmed, the
unit will use the last known point for the K factor in computing the resulting actual flow.
4) Frequencies or apparent flows should be entered in ascending order.
7.6.2 Linearization Table for Pulse Inputs
The linearization table for pulse inputs programming is quite simple when values of frequency and flow are
known. The Flow Computer asks for 16 different frequencies (Freq) and 16 corresponding K factors (K). It then
uses this data to determine what the actual flow is for any given input frequency. Usually the necessary data is
provided with the flowmeter.
7.6.3 Linearization Table for Analog Inputs
The Linearization Table for Analog inputs programming is similar to the Pulse input setup. The Flow Computer
asks for 16 different flow rates (apparent flow) and 16 corresponding Correction Factors. It then uses this data
to determine what the Actual flow is for any given apparent input signal. Again, a minimum of three points must
be set up.
Correction factor = Actual Flow
Apparent Input Flow
The same rules that applied for the Digital setup apply for the Analog setup as well.
The Flow Computer prompts you for the Apparent input signal (APR) and a correction factor (CFr) to multiply
it by to yield true actual flow.