Data Translation DT9871, User Manual

Page: 120 / 134

Appendix A
120
System drift error, zero
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels: ±0.02

V/

C typical
±0.02

V/

C typical
±0.10

V/

C
±0.5

V/

C for the ±10 V input range;
±5

V/

C for the ±60 V input range
a
System drift error, gain
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
±4 ppm/

C
±4 ppm/

C
±10 ppm/

C
±15 ppm/

C
A/D reference
Drift:
Drift per year: ±8 ppm/

C maximum
±100 ppm typical
Full-scale long-term stability
DT9871U and DT9874 thermocouple channels:
DT9871:
DT9872 and DT9874 RTD channels:
DT9873 and DT9874 voltage channels:
±100 ppm/year typical
±100 ppm/year typical
±0.05

C per year @ 0

C (±0.27

C per
year @ full-scale temperature)
±100 ppm/year typical
Warm-up time for the DT9873 and DT9874 voltage
channels:
1 hour
a. For the ±60 V range, no more than 30 Vrms, 42.4 Vpk, 60 VDC is allowed.
Table 16: Voltage Measurement Specifications (cont.)
Feature Specifications