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Analog Input Features
This section describes the following features of the analog input (A/D) subsystem on
TEMPpoint, VOLTpoint, and MEASURpoint instruments:
• Analog input channels, described on this page
• Input ranges, described on
• Resolution, described on
• Calibration, described on
• Sample clock, described on
• Trigger source, described on
• Conversion modes, described on
• Filtering, described on
• Data format, described on
• Error conditions, described on
Analog Input Channels
TEMPpoint, VOLTpoint, and MEASURpoint instruments provide up to 48 analog input
channels. The number of channels and the channel types supported (thermocouple, RTD, or
voltage input) depend on the specific instrument model you purchased, as shown in
Instrument
Type
TEMPpoint
DT9871U-8 and DT9871-8
DT9871U-16 and DT9871-16
DT9871U-24 and DT9871-24
DT9871U-32 and DT9871-32
DT9871U-40 and DT9871-40
DT9871U-48 and DT9871-48
DT9872-8
DT9872-16
DT9872-24
DT9872-32
DT9872-40
DT9872-48
page 92
page 94
page 94
page 95
page 95
page 97
page 97
page 98
Table 2: Number and Type of Analog Input Channels
Models
page 96
# of
Analog Input
Channels
8
8 thermocouple inputs (numbered 0 to 7)
16
16 thermocouple inputs (numbered 0 to 15)
24
24 thermocouple inputs (numbered 0 to 23)
32
32 thermocouple inputs (numbered 0 to 31)
40
40 thermocouple inputs (numbered 0 to 39)
48
48 thermocouple inputs (numbered 0 to 47)
8
8 RTD inputs (numbered 0 to 7)
16
16 RTD inputs (numbered 0 to 15)
24
24 RTD inputs (numbered 0 to 23)
32
32 RTD inputs (numbered 0 to 31)
40
40 RTD inputs (numbered 0 to 39)
48
48 RTD inputs (numbered 0 to 47)
Principles of Operation
Table
2.
Channel Types
89
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