Emerson 5081-P Manuel D’Utilisation
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MODEL 5081-P pH/ORP
SECTION 10.0
PROGRAMMING FOR ORP MEASUREMENTS
10.4 TEMPERATURE ELEMENT
10.4.1 Purpose
This section describes how to match the transmitter to the type of temperature
element in the ORP sensor.
element in the ORP sensor.
10.4.2 Definition
TEMPERATuRE ELEMENT: ORP sensors use a variety of temperature ele-
ments. The Model 5081-P ORP transmitter recognizes the following temperature
elements and configurations:
ments. The Model 5081-P ORP transmitter recognizes the following temperature
elements and configurations:
a. three and four wire 100 ohm platinum RTds
b. three and four wire 1000 ohm platinum RTds
A 100 ohm platinum RTd has a resistance of 100 ohms at 0°C. A 1000 ohm plat-
inum RTd has a resistance of 1000 ohms at 0°C. Although only two lead wires
are necessary to connect the RTd to the transmitter, connecting a third wire
allows the transmitter to correct for the resistance of the lead wires and for
changes in wire resistance with temperature.
inum RTd has a resistance of 1000 ohms at 0°C. Although only two lead wires
are necessary to connect the RTd to the transmitter, connecting a third wire
allows the transmitter to correct for the resistance of the lead wires and for
changes in wire resistance with temperature.
The Model 5081-P transmitter can also be used with a two-wire RTd. Select a
three-wire configuration and jumper the RTd return and -RTd sense terminals
(terminals 3 and 4, respectively).
three-wire configuration and jumper the RTd return and -RTd sense terminals
(terminals 3 and 4, respectively).
10.4.2 Procedure
1. Press PROG on the infrared remote controller (IRC).
2. Press NEXT until the tEMP sub-menu appears in the display. Press
ENTER .
3. Press EXIT to return to the process display.
PROGRAM
tEMP
EXIT
NEXT ENTER