Pressure Systems, Inc. Model 9116 User’s Manual
Page 99
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command (
‘C’
) has a
channel selection bit map
parameter allowing it to calibrate only the
desired pressure channels, the
RUN
port is a viable option for supplying the calibration
pressures.
4.4.2
Multi-Point Calibration Summary
Following is a simple step-by-step procedure for executing a “multi-point” calibration of a
Model
9116
Intelligent Pressure Scanner. It is assumed that all channels in the unit have the same full-
scale pressure range. Optional commands are shown within brackets [ ]. Should it become
necessary to abandon this calibration procedure once it is started, you may execute the Abort
sub-command [‘
C 03
'] of ‘
C
’ at any time after the first ‘
C
’ sub-command.
Description
Model 9116
Command
Ensure that valves in
RUN/CAL
mode (default).
[w1200]
… normal data acquisition assumed to be running
Place the module calibration manifolds into the
CAL
position if this is the desired pressure application input.
The
RUN
position may be a better choice for modules with
transducers having different ranges.
[w0C01]
for
CAL
[w0C00]
for
RUN
Ready the module for multi-point calibration by executing
the Configure & Start (‘
00
’) sub-command of ‘C’. This
establishes all the channels to be affected, and determines
the total number of calibration points that will be supplied (3
in this example) in later steps. It also starts module
averaging for calibration (64 samples in this example). The
linear fit (1) is required.
C 00 FFFF 3 1
64
Apply 1st calibration pressure to the module’s
CAL
or
RUN
inputs. The zero (0.0) point is assumed in this case.
After applying zero pressure verify that this pressure is
measured correctly by the module.
[rFFFF0]
When the data are stable, enter the
Collect Data
(‘
01
’)
sub-command of ‘
C
’ specifying this first calibration point (1)
with zero pressure (0.0).
C 01 1 0.0
Apply 2nd calibration pressure to the module’s
CAL
or
RUN
inputs. A full-scale (+5 psi) point is assumed in this
case.
