Data Translation DT9871, User Manual

Page: 116 / 134

Appendix A
116
RTD Specifications
Table 12 lists the specifications for RTD channels on the DT9872 and DT9874.
Table 13 lists the RTD alpha curves that are supported by RTD channels.
Table 12: RTD Specifications
Feature Specifications
RTD types (software-selectable) Platinum 100

, 500

, and 1000

A/D converter resolution 24-bits
Sample rate 10 Samples/s
a
a. Older versions of this instrument may support a maximum sampling rate of 7.5 Samples/s.
Supported temperature range –200 to +850

C (European standard)
Current source
Absolute current:
Drift:
Drift per year:
425

A, ±0.5% at 25

C (calibrated in firmware)
10 ppm/

C maximum
±100 ppm typical
Internal reference +1.250 ±0.002 V
Thermal disturbance channel-to-channel None
Supported RTD alpha curves See Table 13
Table 13: Supported RTD Alpha Curves
Alpha (Average Temperature
Coefficient of Resistance (/

C))
Nominal
Resistance at 0

C Organization Standard
0.00385 100

British Standard BS1904: 1984
Deutschen Institut
fur Normung DIN 43760: 1980
0.00392 98.129

Scientific Appartus
Manufacturers of
America SAMA
RC-4-1966