Emerson 848T manual Ambient Temperature Effect

Reference Manual

00809-0100-4697, Rev EA October 2011

Rosemount 848T

Ambient Temperature Effect

Transmitter may be installed in locations where the ambient temperature is between -40 and 85 °C (-40 and 185 °F)

Table 3. Ambient Temperature Effects

NIST Type	Accuracy per 1.0 °C (1.8 °F) Change in Ambient Temperature(1)C			Temperature Range (°C)
RTD
Pt 50 (α = 0.00391)	• 0.004		°C (0.0072 °F)	NA
Pt 100 (α = 0.00391)	• 0.002		°C (0.0036 °F)	NA
Pt 100 (α = 0.00385)	• 0.003		°C (0.0054 °F)	NA
Pt 100 (α = 0.003916)	• 0.003		°C (0.0054 °F)	NA
Pt 200 (α = 0.003916)	• 0.004		°C (0.0072 °F)	NA
Pt 200 (α = 0.00385)	• 0.004		°C (0.0072 °F)	NA
Pt 500	• 0.003		°C (0.0054 °F)	NA
Pt 1000	• 0.003		°C (0.0054 °F)	NA
Cu 10	• 0.03 °C (0.054 °F)			NA
Cu 100 (a=428)	• 0.002		°C (0.0036 °F)	NA
Cu 50 (a=428)	•	0.004	°C (.0072 °F)	NA
Cu 100 (a=426)	• 0.002		°C (0.0036 °F)	NA
Cu 50 (a=426)	•	0.004	°C (.0072 °F)	NA
Ni 120	• 0.003		°C (0.0054 °F)	NA
Thermocouple (R = the value of	the reading)
Type B	•	0.014	°C	•	R ≥ 1000
	• 0.032		°C - (0.0025% of (R - 300))	•	300 ≤ R < 1000
	• 0.054		°C - (0.011% of (R - 100))	•	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)		•	R ≥ 0
	•	0.0054 °C + (0.0025% of R)		•	R < 0
Type K	•	0.0061 °C + (0.00054% of R)		•	R ≥ 0
	•	0.0061 °C + (0.0025% of R)		•	R < 0
Type N	•	0.0068 °C + (0.00036% of R)		•	All
Type R, Type S	•	0.016	°C	•	R ≥ 200
	•	0.023	°C - (0.0036% of R)	•	R < 200
Type T, DIN Type U	•	0.0064 °C		•	R ≥ 0
	•	0.0064 °C + (0.0043% of R)		•	R < 0
GOST Type L	•	0.007	°C	•	≥
					R 0
	• 0.007		°C + (0.003% of IRI)	•	R < 0
Millivolt	• 0.0005 mV			NA
2- and 3-wire Ohm	• 0.0084 ohms			NA
4–20 mA (Rosemount)	• 0.0001 mA			NA
4-20 mA (NAMUR)	• 0.0001 mA			NA

(1) Change in ambient is in reference to the calibration temperature of the transmitter (20 °C (68 °F) typical from the factory).

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