Measurement Specialties 9116 Multi-Point Calibration Summary, Description Model Command

Pressure Systems, Inc. Model 9116 User’s Manual

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.

4.4.2Multi-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	[w0C01]
position if this is the desired pressure application input.	for CAL
The RUN position may be a better choice for modules with	[w0C00]
transducers having different ranges.	for RUN
Ready the module for multi-point calibration by executing	C 00 FFFF 3 1
the Configure & Start (‘00’) sub-command of ‘C’. This	64
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.
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	[rFFFF0]
measured correctly by the module.
When the data are stable, enter the Collect Data (‘01’)	C 01 1 0.0
sub-command of ‘C’ specifying this first calibration point (1)
with zero pressure (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.

Page 99 www.PressureSystems.com