3-5
On-line Operations
BASIC SETUP The transmitters must be configured for certain basic variables in order
to be operational. In many cases, all of these variables are
pre-configured at the factory. Configuration may be required if your
transmitter is not configured or if the configuration variables need
revision.
Select Sensor Type The Sensor 1 Conn and Sensor 2 Conn commands designate, for the
transmitter, the sensor type and the number of wires to be connected.
Note that differential and average temperature measurements can only
be made with 2- or 3-wire sensors. The Sensor 2 Conn command
pertains only to the Model 3244MV transmitter. Select from the
following sensor types:
• 2-, 3-, or 4-wire Pt 100, Pt 200, Pt 500, or Pt 1000 (α = 0.00385)
(1)
platinum RTDs
• 2-, 3-, or 4-wire Pt 100 α = 0.003916
(1)
platinum RTD
• 2-, 3-, or 4-wire Ni 120 nickel RTDs
• 2-, 3-, or 4-wire Cu 10 copper RTDs
• Type B, E, J, K, N, R, S, and T thermocouples
• NIST Type C thermocouple
• –10 to 100 millivolts
• 2-, 3-, or 4-wire 0 to 2000 ohms
• Special RTD or T/C calibration schedules
Set Output Units The PV Unit command sets the desired primary variable units. Set the
transmitter output to one of the following engineering units:
• Degrees Celsius
• Degrees Fahrenheit
• Degrees Rankine
• Kelvin
•Ohms
• Millivolts
NOTE
After changing units, press SEND (F2) so the microprocessor will
recalculate the associated variables (4–20 mA points, for example).
Both models recalculate all variables that depend on units. After the
transmitter recalculates the variables, you may change any of the
remaining parameters.
HART Fast Keys 1, 3, (5 or 7)
(1) Pt 1000
α =
0.00385 and Pt 100
α =
0.003916 RTD sensor input types are not available
in previous versions of the Model 3144 and 3244MV transmitters.
HART Fast Keys 1, 3, 2
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