User`s manual

December 2003
E-4 Temperature Transmitter Installation
Making Electrical Connections
The TransPort will not accept a signal directly from the RTD;
therefore, you must have some type of 4 to 20-mA transmitter.
GE Panametrics supplies a dual transmitter (DTR) with a special
LEMO connector that attaches to the TransPort. The TransPort
supplies power to the DTR using an internal 16 V supply. If you
decide to supply your own transmitter, you can use the 16 V
supply to power your transmitter; however, you will need to order
the special LEMO connector cable to connect your transmitter to
the TransPort.
To make electrical connections, you must connect the RTD
sensor to the 4 to 20-mA transmitter, and then connect the DTR
to the TransPort. Use the following sections to make electrical
connections.
Connecting the RTD to the 4 to 20-mA Transmitter
RTDs should have two common leads and one signal lead. If you
are using a GE Panametrics RTD, the wire colors may vary;
however, two of the RTD wires will be the same color. The wires
that are the same color are the common leads and the remaining
wire is the signal lead.
If you are using your own transmitter, make the necessary
connections. If you are using the GE Panametrics DTR, connect
the RTD wires to the terminal block labeled RTD Inputs. Connect
the common and signal wires to the appropriate pins as
designated on the terminal block label.
IMPORTANT: The supply and return RTD cables must be the
same length in order to make accurate
temperature measurements.
When you have completed supply and return connections,
proceed to the next section.