PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc.
Page 138
5 . 6 O V E R H A U L
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Any or all of the following items may be included as part of a system maintenance overhaul:
•
Disassemble pneumatic module filters and clean filter elements. Replace, if necessary.
•
Clean front panel.
•
Clean threads of rear panel fittings. Check for damage and replace, if necessary.
•
Check that rear panel cooling fan operates when PPC2+ is ON.
•
Check that internal screws, bolts and nuts are tight.
•
Check that the gas flow through exhaust port when VENT is closed and test port at atmosphere is
between 500 sccm and 1.5 slm.
•
Verify that internal barometer reads atmospheric pressure within ± 0.15 psi (1 kPa).
•
Perform system leak and operational check.
•
Perform calibration of reference pressure transducers if necessary.
5 . 7 R E L O A D I N G E M B E D D E D S O F T W A R E I N T O F L A S H
M E M O R Y
•
The PPC2+ uses FLASH memory. This allows the embedded software that controls PPC2+
operations and functions to be loaded into PPC2+ over its COM1 port from a personal computer
with a simple FLASH loading utility.
•
To replace corrupted software or upgrade your software, your authorized service provider will
provide you with a FLASH memory loading utility along with a file containing the PPC2+
embedded software.
•
If the your embedded software is suspected of a problem, record all symptoms and contact your
Authorized Service Provider.
Summary of Contents for PPC2+
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