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T400 Ozone Analyzer Operator’s Manual Theory of Operation
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Figure 13-6. CPU Board
The CPU includes two types of non-volatile data storage: Disk-on Module (DOM) and
an embedded flash chip.
13.3.2.1. Disk-On-Module
The DOM is a 44-pin IDE flash drive with a storage capacity up to 128 MB. It is used to
store the computer’s operating system, the Teledyne API firmware, and most of the
operational data generated by the analyzer’s internal data acquisition system (DAS).
13.3.2.2. Flash Chip
This non-volatile, embedded flash chip includes 2 MB of storage for calibration data as
well as a backup of the analyzer configuration. Storing these key data onto a less heavily
accessed chip significantly decreases the chance of data corruption.
In the unlikely event that the flash chip should fail, the analyzer will continue to operate
with just the DOM. However, all configuration information will be lost, requiring the
unit to be recalibrated.
06870C DCN6332