User`s manual

Measurement Specialties Inc. Model 9116 User’s Manual
Page 33 www.MEAS-SPEC.com
Example:
● Configure and start the Multi-Point Calibration function so that it affects only the first
four (4) channels of the module. Three (3) pressure calibration points will by supplied
when we continue this function later (see example for ‘01’ sub-command below). A
linear (1st order) fit will be used to obtain a new set of offset and gain correction
coefficients for these four (4) channels. The maximum average sample count (32) is
used to collect each calibration data point, so as to minimize any noise in the data
samples. The module’s data acquisition process is altered immediately to collect the
increased number of averages.
“C 00 F 3 1 32”
Read response:
“A”
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