Emerson Rosemount FCL, Reference Manual

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5.3 Configuring, ranging, and simulating outputs
5.3.1 Purpose of configuration
This section describes how to configure, range, and simulate the two analog current
outputs.
Important
Configure the outputs first.
1. Configuring an output means
a. Assigning a sensor and measurement (chlorine, pH, or temperature) to an
output.
b. Selecting a 4-20 mA or 0-20 mA output.
c. Choosing a linear or logarithmic output.
d. Adjusting the amount of dampening on the analog current output.
e. Selecting the value the output current goes to if the transmitter detects a
fault.
2. Ranging the outputs means assigning values to the low (0 or 4 mA) and high (20
mA) outputs.
3. Simulating an output means making the transmitter generate an output equal to
the value you enter.
5.3.2 Definitions
Analog current
output The transmitter provides either a continuous 4-20 mA or 0-20 mA
output signal proportional to chlorine, temperature, or pH.
Assigning an
output Outputs can be assigned to any sensor and to either free chlorine or
temperature.
Linear output Linear output means the current is directly proportional to the value
of the variable assigned to the output (chlorine, pH, or temperature).
Logarithmic
output Logarithmic output means the current is directly proportional to the
common logarithm of the variable assigned to the output (chlorine,
pH, or temperature).
Dampening Output dampening smoothes out noisy readings. It also increases
response time. The time selected for output dampening is the time to
reach 63% of the final reading following a step change. Output
dampening does not affect the response time of the display.
Fault The transmitter continuously monitors itself and the sensor(s) for
faults. If the transmitter detects a fault, a fault message appears in the
main display. At the same time, the output current goes to the value
programmed in this section. There are two output fault modes: fixed
and live. Fixed means the selected output goes to the previously
Programming the transmitter Reference Manual
May 2019 00809-0100-3412
42 Emerson.com/Rosemount