Emerson Rosemount 848T, Reference Manual, Page: 71 / 136

63
Reference Manual
00809-0100-4697, Rev GA
Appendix A: Reference Data
November 2014
Reference Data
A.4.11 Ambient temperature notes
Examples
When using a Pt 100 (
α
= 0.00385) sensor input at 30 °C ambient temperature:

Digital Temperature Effects: 0.003 °C x (30 - 20) = 0.03 °C

Worst Case Error: D Digital Temperature Effects = 0.3 °C + 0.03 °C = 0.33 °C

Total Probable Error
Type R, Type S
• 0.016 °C
• 0.023 °C - (0.0036% of R) • R
≥
200
• R
<
200
Type T, DIN Type U
• 0.0064 °C
• 0.0064 °C + (0.0043% of |R|) • R
≥
0
• R
<
0
GOST Type L
• 0.007 °C
• 0.007 °C + (0.003% of IRI) • R
≥
0
• R
<
0
Millivolt
• 0.0005 mV
N/A
2- and 3-wire ohm
• 0.0084 ohms
N/A
4–20 mA (Rosemount)
• 0.0001 mA
N/A
4-20 mA (NAMUR)
• 0.0001 mA
N/A
(1) Change in ambient is in reference to the calibration temperature of the transmitter (20 °C (68 °F) typical from the factory).
NIST type Accuracy per 1.0 °C (1.8 °F) change in ambient temperature
(1)
° C Temperature range (°C)
0.302 0.032 + 0.30
°
C =