3-24 | IPS-4 Dual Bench (UV / IR) Analyzer
A minimum of 15 minutes is required to properly purge and pressur-
ize the analyzer Electronics Enclosure.
The Expo Technologies MiniPurge
®
System uses a Battery Pack to
power its purge timer. AMETEK recommends replacing the Battery
Pack every three years to ensure proper and safe operation of the
purging system. See “Analyzer Preventive Maintenance Schedule” in
Chapter 6 for more information.
Working with the purged enclosure open is typically limited to instal-
lation, start-up, and certain troubleshooting and maintenance proce-
dures. In these cases, the Purge Bypass Switch (Figure 3-6) must be in the
“BYPASS” position (and appropriate safety conditions must have been
met, as per company policy).
For normal analyzer operation, the Purge Bypass Switch must be in the
“ACTIVE” position and the key must be removed (follow company policy).
B
Y
P
A
S
S
A
C
T
I
V
E
Figure 3-6.
Purge Bypass Switch
label.
!
WARNING
To ensure safe operating conditions, the analyzer will not power up until
the MiniPurge
®
system has been connected to the instrument air supply
(ALARM/PRESSURIZED indicator is GREEN) and has successfully com-
pleted its purge timing cycle (the PURGE TIMING/STATUS LEDs are
now off) and the enclosure is pressurized.
After powering up the analyzer for the first time, certain checks must be
performed with the Electronic Enclosure door open to ensure the ana-
lyzer is operating properly. These checks are discussed in the following
power-up procedure. If problems are encountered during power-up, refer
to “Start-Up Diagnostic Checklist” in this chapter, for help in diagnosing
and correcting problems.
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