12
Rosemount 848T Family
November 2014
www.rosemount.com
Ambient temperature effect
Transmitters may be installed in locations where the ambient temperature is between –40 and 85 °C (–40 and 185 °F).
Table 4. Ambient Temperature Effects
NIST type
Accuracy per 1.0 °C (1.8 °F) change in ambient temperature
(1)(2)
(1) Change in ambient is in reference to the calibration temperature of the transmitter (20 °C (68 °F) typical from the factory).
(2) Ambient temperature effect specification valid over minimum temperature span of 28 °C (50 °F).
Temperature range (°C)
RTD
Pt 50 (α = 0.00391) 0.004 °C (0.0072 °F) N/A
Pt 100 (α = 0.00391) 0.002 °C (0.0036 °F) N/A
Pt 100 (α = 0.00385) 0.003 °C (0.0054 °F) N/A
Pt 100 (α = 0.003916) 0.003 °C (0.0054 °F) N/A
Pt 200 (α = 0.003916) 0.004 °C (0.0072 °F) N/A
Pt 200 (α = 0.00385) 0.004 °C (0.0072 °F) N/A
Pt 500 0.003 °C (0.0054 °F) N/A
Pt 1000 0.003 °C (0.0054 °F) N/A
Cu 10 0.03 °C (0.054 °F) N/A
Cu 100 (a=428) 0.002 °C (0.0036 °F) N/A
Cu 50 (a=428) 0.004 °C (.0072 °F) N/A
Cu 100 (a=426) 0.002 °C (0.0036 °F) N/A
Cu 50 (a=426) 0.004 °C (.0072 °F) N/A
Ni 120 0.003 °C (0.0054 °F) N/A
Thermocouple (R = the value of the reading)
Type B
0.014 °C
0.032 °C - (0.0025% of (R - 300))
0.054 °C - (0.011% of (R - 100))
R ≥ 1000
300 ≤ R < 1000
100 ≤ R < 300
Type E 0.005 °C + (0.00043% of R) All
Type J, DIN Type L
0.0054 °C + (0.00029% of R)
0.0054 °C + (0.0025% of |R|)
R ≥ 0
R < 0
Type K
0.0061 °C + (0.00054% of R)
0.0061 °C + (0.0025% of |R|)
R ≥ 0
R < 0
Type N 0.0068 °C + (0.00036% of R) All
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
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