PPC4™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company
Page 14
Observe the current value of atmospheric pressure. Check that the value agrees
with the local value of atmospheric pressure. Repeat this process for all the Axxx
(absolute) Q-RPTs and or the utility sensor in the PPC4 system. Check that the
values of atmospheric pressure measured by the different devices agree with
each other within PPC4 or RPM4 measurement tolerances as applicable (see
Section 1.2.3). If they do not agree within tolerances, the PPC4 or RPM4 Q-RPT
may need calibration or repair.
2.4.2.2 Checking Gauge Mode Pressure Measurement
If the PPC4 is not vented,
to vent it (see Section 3.2.14).
Note
It is normal for PPC4 to indicate a value other than zero when
vented when gauge mode is first entered or ranges are changed.
After about ten seconds, the vent LED should flash and zero
should be indicated. If this does not occur, check that the
AutoZero function is ON (see Section 3.2.22). If AutoZero is ON
and the displayed pressure will not zero when vented in gauge or bi-
directional gauge measurement mode, PPC4 may need repair.
2.4.2.2.1
Basic Interface
Select <Range>
in the Main Menu to change ranges if necessary and select the
Axxx (absolute) Q-RPT DF range (see Section 4.4.1). Press <Mode> in the Main
Menu and select <Gauge> mode (see Section 3.2.11). Use <Unit> under the
Main Menu to change the pressure unit if desired (see Section 3.2.10).
Observe that, within ten seconds, zero is indicated. It is normal for PPC4 to indicate a
value other than zero for up to ten seconds when first entering gauge mode.
Select <Range> under the Main Menu to change ranges, observe that zero is
indicated for each Q-RPT within 10 seconds.
2.4.2.2.2
Advanced Interface
Use
[AutoRange], Range:
to select the DF range of the Axxx (absolute) Q-RPT
(see Section 5.7.1).
Enter
(click) the measurement mode shortcut (see Sections
5.1 and 5.7.6.2) to change to Absolute mode.
Enter
the unit shortcut (see
Sections 5.6.1 and 5.7.6.1) to change the pressure unit if desired.
Observe that, within ten seconds, zero pressure is indicated. It is normal for PPC4 to
indicate a value other than zero for up to ten seconds when first entering gauge
mode.
Use
[AutoRange], Range:
to change ranges, observe that zero pressure is
indicated for each Q-RPT within 10 seconds.
Summary of Contents for PPC4
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