5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION
Page 129 © 2002-2007 DH Instruments, a Fluke Company
A new PPC3 is delivered with PA and PM values set to zero and 1 for all ranges. This does
not mean that the PPC3 has not been calibrated. In the original factory calibration, privileged
factory coefficients are used for calibration with the user PA and PM set to zero and 1.
To access Q-RPT calibration information viewing or editing press [SPECIAL], <8Cal>.
Select the desired Q-RPT. The <1view> selection displays the calibration information fields.
The <2edit> function displays the fields and allows them to be edited. The display is:
1. Date of last calibration in YYYYMMDD format.
2. Position designator of the Q-RPT being viewed.
3. Current value of absolute mode P
offset
.
This line is blank if the Q-RPT is not an Axxx type.
Cal date:20021117 IH
AbsPoffset: 0.0 Pa
If in edit mode, the calibration information fields can be edited. Edits to P
offset
are common
with changes made in the AutoZ edit or run function (see Section 3.5.1). Pressing [ENT] on
the last field goes to the next view/edit screen:
1. Value of PA.
2. Position designator of the Q-RPT being viewed.
3. Value of PM.
PA: 0.0 Pa IH
PM: 1.000000
If in edit mode, the calibration fields can be edited. If the selected Q-RPT is an Axxx Q-RPT,
pressing [ENT] in the PM field goes to the next calibration information display
(this display is skipped if the Q-RPT is an Gxxx or BGxxx):
1. Position designator of the Q-RPT being viewed.
2. Cursor is on current ON or OFF selection.
Absolute and IH
neg g mode: 1on 2off
If in edit mode, the ON or OFF status can be changed by selecting <1on> or <2off>
(see Section 5.2.5). [ENT] in view mode returns to the view/edit screen. [ENT] in edit mode
goes to confirmation of change activation if changes have been made. Pressing [ESC] in any
edit screen exits the edit screen without activating any changes.
The value of PA is always in Pascal (Pa). The value of PM is dimensionless.
PPC3 may also use external Q-RPTs mounted in RPM4 Reference Pressure Monitors.
Viewing and adjustment of RPM4 calibration information is performed locally on the RPM4,
not through PPC3 (see the RPM4 Operation and Maintenance Manual).
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