5. ADVANCED USER INTERFACE
Page 109
© 2009 DH Instruments, a Fluke Company
OPERATION
Note
•
Run AutoZ applies only to Axxx Q-RPTs in absolute
measurement mode. In gauge and negative gauge
measurement modes, AutoZ is run automatically whenever
the PPC4 is in the Vent condition (see Section 3.2.14).
•
In order to Run AutoZ, AutoZ must be On. To turn AutoZ
On or Off use
[Settings], <More >>>, <Calibration>, xx RPT,
<AutoZ>, Absolute AutoZ
(where xx RPT could be Hi RPT or
Lo RPT). See Section 7.2.7.2.
To open the Run AutoZ menu from the Main RunScreen use
[Tools], <System>,
Run AutoZ.
The shortcut to Run AutoZ is
AutoZ
on the Main Run Screen. If the
current measurement mode is gauge or negative gauge, a message indicating
that AutoZ cannot be run manually in gauge mode is displayed. If AutoZ is OFF
for the active Q-RPT then an error message will indicate that AutoZ is not
available.
Note
Allow the PPC4 to stabilize at atmospheric pressure and
ambient temperature for 10 to 15 minutes before running AutoZ.
The Run AutoZ screen shows a numeric entry field for
P
std,0
, the reference pressure.
This is the pressure reading of the reference device used for comparison. Note that
the reference pressure must be entered in the same unit of measure as the PPC4
pressure. The current PPC4 pressure is shown for reference on the second line.
Note
•
While the value of Reference (P
std,0
) is entered in the
current pressure unit of measure, the value of P
offset
is
always in Pascal (Pa).
•
If running AutoZ results in a value of P
offset
that is greater than
± 0.005 % FS of the span of the Q-RPT that is being
AutoZeroed, the Q-RPT and/or the reference used as the
source of Pstd,0 may be out of tolerance or the AutoZ
process may have been faulty. Before activating a new P
offset
greater than ± 0.005 % FS of the active Q-RPT, check to be
sure that both the Q-RPT and the reference were in good
working order, properly vented to stable atmospheric
pressure, at the same height, and reading in the same
pressure units when AutoZ was run.
•
When running AutoZ, if a Head correction is currently
active (see Section 3.2.16), it is momentarily disabled to
avoid “zeroing out” the head value.
5.7.5.2 Control Configuration
PURPOSE
This function is considered part of PPC4 maintenance and is therefore covered in
the maintenance section of this manual. See Section 7.5.
OPERATION
This function is considered part of PPC4 maintenance and is therefore covered in
the maintenance section of this manual. See Section 7.5.2.
Summary of Contents for PPC4
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