Simulating Inputs - Temperature - Emerson Rosemount FCL-01 Reference Manual

Troubleshooting
October 2023
10.10

Simulating inputs - temperature

10.10.1 General information about simulating temperature
The transmitter accepts a Pt100 resistance temperature device. The Pt100 RTD is a three-
wire configuration.
See Figure
Figure 10-3: Three-wire RTD configuration
A. RTD
B. RTD in
C. RTD sense
D. RTD return
Although only two wires are required to connect the RTD to the transmitter, using a third
(and sometimes fourth) wire allows the transmitter to correct for the resistance of the lead
wires and for changes in the lead wire resistance with temperature.
10.10.2 Simulating temperature
To simulate the temperature input, wire a decade box to the transmitter as shown in
Figure
Figure 10-4: Simulating RTD inputs
A. RTD return
B. RTD sense
C. RTD in
D. RTD shield
To check the accuracy of the temperature measurement, set the resistor simulating
the RTD to the values indicated in
measured temperature might not agree with the value in
60
Table 10-2: Voltage and pH
Voltage (mV)
-59.2
-177.5
-295.8
10-3.
10-4.
(continued)
pH (at 77 °F [25 °C])
8.00
10.00
12.00
Table 10-3 and note the temperature readings. The
Table
Reference Manual
00809-0200-3412
10-3. During sensor
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