Pressure Systems, Inc. Model 9116 User’s Manual
Page 34 www.PressureSystems.com
Command ‘C’— Sub-command Index 01: Collect Data for a Calibration Point
This sub-command has two (2) additional required parameters.
Command “C 01 pnt pppp.pppp”
‘C’ is the command letter.
‘ 01’ is the sub-command index (ii) for Collect Data
‘ pnt’ identifies a particular calibration point that will be supplied. It must
be between 1 and npts, where npts was a parameter of the previously
executed Configure & Start (‘00’) sub-command.
‘ pppp.pppp’ is the pressure value (in current EU) that is actually applied
currently to the module’s transducers by a precision calibrator.
NOTE: all parameters are separated by a space.
Response “pppp.pppp [pppp.pppp]...”
The actual measured pressure values (in current EU) from each affected
channel of the module (highest numbered specified channel first, lowest
numbered specified channel last, as per the pppp bit map parameter of the
Configure & Start (‘00’) sub-command. The decimal response datum
format (format 0) is always used.
Description: This sub-command (to be executed two or more times) carries out the data
collection phase of the Multi-Point Calibration function for exactly one (1)
calibration point (i.e., per parameter pnt). Each execution applies a specified
pressure value; then collects, averages, and stores the data for that calibration
point. It must be repeated until all pressure points, as specified by the npts
parameter of the original Configure & Start (‘00’) sub-command, are applied and
their data collected. For each particular point, enter the sub-command after that
point’s pressure value has been properly applied to the module, and that value is
stable (unchanging). Pressure may be applied to either the Cal or Run ports, as
necessary. Use a Model 903x Calibrator or some other suitable precision
pressure source to generate the pressure.
It is not necessary to enter the two or more calibration points in strict numerical
order (i.e., 1, 2, ... npts). Any convenient entry order is allowed, though each
point’s actual pressure value must be correctly stated (with the pppp.pppp
parameter) when executed. Previously entered points may be reentered if it is
necessary to account for hysteresis. However, all the points specified by the
pts parameter of the Configure & Start (‘00’) sub-command must be supplied
before the final Calculate and Apply (‘02’) sub-command can be executed, else
an error will result.