Pressure Systems 9022 - Manual (Page 121)

Pressure Systems, Inc. NetScanner™ System (9016, 9021, & 9022) User’s Manual
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be applied between the CAL and CAL REF ports (see Section 4.3.1 for more information on these
ports). Since the module will not attempt to shift this valve automatically, as it does for Re-zero
adjustment, it should be placed in the desired position manually with the Set Operating Options
(‘w’) command (option indexes = 0C and 12). This is illustrated in the example of the next section.
When multi-point calibrating Model 9016 modules with multiple ranges installed, the CAL port
may be used to apply pressure to all transducers only if the specified proof pressure is not
exceeded on any channel. If the application of a specific span pressure exceeds the proof pressure
rating of any other transducer contained within the same scanner, the calibration pressures must be
applied to the RUN side pneumatic input ports. Since the calibration 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 9016,
9021, or 9022 Intelligent Pressure Scanner. For Models 9021 and 9022, skip the steps that
manipulate valves as denoted by the double asterisk (**). 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 9016
Command
9021/9022
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
**