Emerson Rosemount 3095 - Analog Input (AI) Block; Configure the AI Block

Reference Manual
00809-0100-4716, Rev JA
May 2008
Rosemount 3095 MultiVariable
4-22
FIELDBUS
ANALOG INPUT (AI)
BLOCK
The Analog Input (AI) function block provides the link communicating the
process variables in the transducer block to the F
OUNDATION fieldbus
segment. The Rosemount 3095 provides process variable measurement for
static pressure (absolute or gage), differential pressure, process temperature
and sensor temperature. Fully compensated Mass Flow is available as a
calculated process variable.
Configure the AI block A minimum of four parameters are required to configure the AI Block. The
parameters can be changed in the field using any F
OUNDATION fieldbus host
or configuration tool which supports DD methods.
CHANNEL
Channel defines which transducer block measurement is used by the AI
Block. Select the channel that corresponds to the desired measurement.
L_TYPE
The L_TYPE parameter defines the relationship of the sensor measurement
(pressure or sensor temperature) to the desired output temperature of the AI
Block (e.g. pressure, level, flow, etc.). The relationship can be direct, indirect,
or indirect square root.
Direct
Select direct when the desired output will be the same as the sensor
measurement (pressure or sensor temperature).
Indirect
Select indirect when the desired output is a calculated measurement
based on the sensor measurement (e.g. a pressure measurement is made
to determine level in a tank). The relationship between the sensor
measurement and the calculated measurement will be linear.
Indirect Square Root
Select indirect square root when the desired output is an inferred
measurement based on the sensor measurement and the relationship
between the sensor measurement and the inferred measurement is
square root (e.g. flow).
Channel Measurement
1 Differential Pressure
2 Static Pressure
3 Process Temperature
4 Sensor Temperature
5Mass Flow