Specifications

MI 611-211 – October 2005 3. Operation
20
For CUSTOM compensation, the temperature values must be entered in increasing order and the
slope of the curve cannot change direction. Deviation from this requirement will cause an
ER DATA message and force a resequence through the point pairs.
Config Temp
(Refer to “Structure Diagram 3” on page 40.)
This section of the structure asks you to specify the temperature features. First, specify the TEMP
UNITS
as CELSIUS or FAHRENheit. All references to temperature will appear in the specified
units within the transmitter software.
Next, specify the TEMP MODE as AUTO or MANUAL. In the AUTO mode, the temperature
follows the RTD. In MANUAL mode it is set at a fixed value. At this point you can set a
DEFAULT value for the AUTO mode (in case the RTD fails) at the temperature at which you
expect the process to be operating; or you can set a temperature for the MANUAL mode.
Last, specify the TEMP TYPE as standard RTD or BALCO. If you specify the TYPE as RTD,
specify 2-WIRE or 3-WIRE and specify the resistance as 100 OHM or 1000 OHM. Follow Table 6
for Invensys Foxboro sensors.
Table 6. Invensys Foxboro Sensor Data
Sensor Type Resistance
PH10-..1
ORP10-..1
2-wire 100 Ω
PH10-..2
ORP10-..2
3-wire 1000 Ω
PH10-..3
ORP10-..3
2-wire 100 Ω
PH10-..4
ORP10-..4
3-wire 1000 Ω
871PH-1 2-wire 100 Ω
871PH-2 2-wire 100 Ω
871PH-3 3-wire 1000 Ω
871PH-4 3-wire 1000 Ω
871PH-5 2-wire 1000 Ω
871PH-6 2-wire 1000 Ω
871A-1 2-wire 100 Ω
871A-2 2-wire 100 Ω
871A-3 2-wire 1000 Ω
871A-4 3-wire 1000 Ω
EP459A 2-wire 100 Ω
EP460 3-wire 100 Ω
EP462 3-wire 100 Ω
EP466 3-wire 100 Ω