Data Translation DT9828, User Manual, Page: 59 / 116

Principles of Operation
59
Analog Input Features
This section describes the features of the analog input (A/D) subsystem, including the
following:
• Analog input channels, described next
• Cold junction compensation, described on page 61
• Open thermocouple detection, described on page 61
• Input ranges and gains, described on page 61
• Input resolution, described on page 62
• A/D sample clock sources, described on page 62
• Triggers, described on page 63
• Analog input conversion modes, described on page 63
• Filtering, described on page 65
• Data format, described on page 65
• Error conditions, described on page 66
Analog Input Channels
The DT9828 module supports eight differential analog input channels. You can use the analog
input channels for thermocouple or voltage measurements. You wire these inputs to the screw
terminals on the module. Refer to
Chapter 3 starting on page 31 for wiring information.
You can attach one of the following thermocouple types to each analog input channel: J, K, T,
B, E, N, R, and/or S. If desired, you can attach a voltage input to each analog input channel
instead.
You can specify the thermocouple types for channels using software.