Teledyne 9110TH - Nitrogen Oxides Analyzer - Manual (Page 300)

Model 9110TH NOx Analyzer Principles of Operation
Teledyne Analytical Instruments 280
commands to a variety of peripheral devices through the motherboard, the main printed
circuit assembly on the rear panel.
8.5.1. CPU
The unit’s CPU card, installed on the motherboard located inside the rear panel, is a low
power (5 VDC, 720mA max), high performance, Vortex 86SX-based microcomputer
running Windows CE. Its operation and assembly conform to the PC 104 specification.
Figure 8-16: 9110TH/M CPU Board Annotated
The CPU includes two types of non-volatile data storage: a Disk on Module (DOM)
with an embedded 2MB flash chip.
8.5.1.1. Disk On Module (DOM)
The DOM is a 44-pin IDE flash drive with storage capacity to 128 MB. It is used to
store the computer’s operating system files, the Teledyne firmware and peripheral files,
and the operational data generated by the analyzer’s internal data acquisition system
(DAS).
8.5.1.2. 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 on a less heavily
accessed chip significantly decreases the chance of data corruption.