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Pressure Systems 9022 Manual de usuario Pagina 124

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Measurement Specialties Inc. NetScanner System (9016, 9021, & 9022) User’s Manual
4 - 12
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]
[r0FFF0]
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.
Verify that pressure reads correctly.
[rFFFF0]
[r0FFF0]
When the data are stable, enter another Collect Data
(‘01’) sub-command of ‘C’ specifying this second
calibration point (2) with 5.0 psi pressure.
C 01 2 5.0
Apply 3rd calibration pressure to the module’s CAL or
RUN inputs. A mid-scale negative (-2.5 psi) point is
assumed in this case. A vacuum pump is normally
required to achieve such a pressure with 903x calibrators.
Verify that measured pressure reads correctly.
[rFFFF0]
[r0FFF0]
When the data are stable, enter last Collect Data (‘01’)
sub-command of ‘C’ for this point (3) with a negative
(-2.5 psi) pressure.
C 01 3 -2.5
Now that data have been collected for every point
originally specified, calculate and apply the new
coefficient data with a Calculate and Apply (‘02’)
sub-command of ‘C’. This also restores the module to
using its original averaging parameters that existed before
the first ‘C’ command.
C 02
Place calibration manifold back into the RUN position, if
the CAL position was used.
[w0C00]
**
Store new offset and gain coefficients into transducer
non-volatile memory.
w08
w09
… continue normal data acquisition.
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