Rosemount 848T Manual de usuario descargar pdf (Pagina 11)

Rosemount 848T Family

November 2014

www.rosemount.com

Differential configuration notes

Differential capability exists between any two sensor types.

For all differential configurations, the input range is X to Y where

X = Sensor A minimum - Sensor B max.

Y = Sensor A maximum - Sensor B min.

Accuracy for differential configurations

If sensor types are similar (for example, both RTDs or both

thermocouples), the accuracy = 1.5 times worst case accuracy

of either sensor type. If sensor types are dissimilar (for example,

one RTD and one thermocouple), the accuracy = Sensor 1

Accuracy + Sensor 2 Accuracy.

Analog sensors 4–20mA

Two types of alarm levels are available with 4-20 mA sensors on

the 848T. These types must be ordered with the S002 option

code complete with an analog connector kit. The alarm levels,

accuracy for each type are listed in Table 3.

Table 3. Analog Sensors

Sensor option

Alarm levels Accuracy

4–20 mA

(Rosemount Standard)

3.9 to 20.8 mA ± 0.01 mA

4–20 mA (NAMUR) 3.8 to 20.5 mA ± 0.01 mA

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 35 36

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Rosemount 848T Manual de usuario Pagina 11