PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company
Page 196
Use
[Settings], <Calibration>, Hi RPT
or
Lo RPT
and write the new calibration
date and the new values of PA and PM for the Q-RPT and range calibrated. If
this is an Axxx Q-RPT used in absolute mode, use
[Settings], <Calibration>,
<AutoZ>, Absolute Poffset
to edit the value of P
offset
to zero. If this is an Axxx
Q-RPT and the calibration was performed in gauge mode, turn absolute and
negative gauge modes Off to avoid their being used after the calibration by setting
Gauge Only
to
On
(see Section 7.2.5.
Calculate as left data for the calibration if desired following:
as left reading = (non-corrected reading • new PM) + new PA
Perform additional verification pressure runs as desired.
7.3
Adjustment of an On-board Barometer
PURPOSE
To adjust the output of the on-board barometer (see Sections 1.2.2.3 and 3.2.27.3).
Note
PPC4’s that have only Gxxx Q-RPTs (no Axxx, BGxxx or utility sensors) are NOT
equipped with an on-board barometer.
PRINCIPLE
The on-board barometer output can be adjusted using PA and PM values in the same manner as Q-RPTs
(see Section 7.2.1.1).
Note
The on-board barometer is a low accuracy sensor used for measuring changes in
atmospheric pressure over short periods of time (see Section 3.2.22) and line
pressure for G15K and BG15K line pressure compensation. PPC4 measurement
uncertainty does not depend on the measurement uncertainty of the on-board
barometer.
OPERATION
7.3.1
Basic Interface
To edit the values of PA and PM for the barometer, select
<Spec>,
<Cal>
,
<Barometer>
from
the Main Menu. Set the calibration date
[YYYYMMDD]
and edit PA and PM. With security set
to
<Off>,
the values can be edited (see Section 3.2.26.5).
to accept changes and return to the Main Run Screen.
to exit to the Main Run
Screen and make no changes.
7.3.2
Advanced Interface
To edit the values of PA and PM for the barometer, use
[Settings], <Calibration>, Barometer
.
Set the calibration date
[YYYYMMDD]
and edit PA and PM. With security set to
Off
,
the values can be edited (see Section 3.2.26.5).
[OK]
to accept changes and return to the Main Run Screen.
[Back]
to return to
<Calibration>
and make no changes.
[Esc]
or
to exit to the Main Run Screen and make no changes.
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