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Pressure Systems 98RK-1 User Manual

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Pressure Systems, Inc. 98RK-1 & 9816 User’s Manual©

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Command 'C'- Sub-command Index 02: Calculate & Apply Correction
Coefficients

This sub-command has no additional parameters.


Command

C 02


‘C’ is the command letter.
‘ 02’ is the sub-command index (ii) for Calculate & Apply

NOTE: all parameters are separated by a space.


Response

A

‘A’ is the acknowledge letter — returned if the required number of
calibration data points had their data successfully collected previously, and
the resulting calculated data is reasonable. Else, an error (‘N’) response is
returned.


Description: This sub-command finishes the Multi-Point Calibration function, previously
started

by

the

Configure & Start (‘00’) sub-command. It calculates new

correction coefficients using the pressure data collected by all required

executions

of

the

Collect Data (‘01’) sub-command.

All the averaged data points collected previously are checked for
reasonableness, and then a new set of zero and gain correction coefficients are
calculated by the least-squares method for each channel (transducer) affected by
the calibration. These are stored in the module’s volatile memory for use by all
subsequent EU data conversion of these channels until the module is reset or
powered off. These coefficients may be stored in the non-volatile memory of the
module’s transducers with the 'w' command (see indexes 08 and 09 for that
command). The latest calculated zero and gain coefficients may be inspected
with the 'u' command at any time for any channel.


Finally, this sub-command restores the original “A/D samples for averaging”

count used by the module’s data acquisition process to the value that was in use

before

the

Multi-Point Calibration function was originally started.


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