Principles of Operation Teledyne API T803 CO2/O2 Analyzer Operation Manual
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Figure 12-8. CPU Card
The CPU includes two types of non-volatile data storage: an embedded 2MB
flash chip and a Disk on Module (DOM).
12.6.2.1. DISK-ON-MODULE (DOM)
The DOM is a 44-pin IDE flash disk with a storage capacity up to 128MB. 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 - Section 7.1). The LEDs on the DOM indicate power and
reading/writing to or from the DOM.
12.6.2.2. FLASH CHIP
This non-volatile, embedded flash chip includes 2MB of storage for calibration
data as well as a backup of the analyzer configuration. Storing these key data on 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.
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