Specifications

Functional Tasks
This section provides an operational overview of the Real-Time
functional tasks of the Maxum II.
Overview
• Startup Tasks
Applying Power
Valid Database
Oven Temperature
Cycle Control Flag
• Timed Event Scheduling
Time-Of-Day Clock
Schedule of Events
• Frequency Events
• Analysis Cycle Clock
Accessing CIM
Analysis Cycle Clock
Cycle Clock
Valve Events
• Manual Operations
User Interface
On start-up, when primary AC power is applied to the analyzer, the
analyzer first processes whatever electronic self-tests and diagnostics
are required (for example, PROM, RAM, A/D, communication ports, etc.).
The processing occurs within 5 seconds.
Startup Tasks
System related initial messages are generated and output to the network
ports. Appropriate initial messages are then displayed on the CIM
display panel and completed within 20 to 25 seconds. If the analyzer
cycle clock is in RUN or CAL mode, an appropriate alarm may be
generated during this internal test and the following startup period.
After the self-test, the following conditions occur:
Self Test
• Installed hardware is initialized
• Interrupts enabled
• Oven temperatures and carrier pressure default set points are output
• Analog input system(s), associated with detector inputs, are
initialized and begin scanning.
The CIM checks to be certain a valid database is resident. If it is, the
appropriate temperature and carrier set points are output. If not, default
set points are left in place.
The oven temperature is monitored to check for being at set point and
stable before automatically proceeding. Depending on how long primary
AC power has been off, this may take from 2 seconds to 45 minutes.
Oven Temperature
A5E31405710001 1-23