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are then converted into the unit of measurement (scaling) from the
sensor. For non-linear characteristics use
Sensor compensation
. See
tab. The specified range (in the example 0 degrees
to 270 degrees) is used as the default for the
ProfiSignal
graphic display
area. The channel receives the status "scale range overrun" or "scale
range underrun" when not within the range. Channel status values are
available in the table in
.
Connection
Indicate here how the sensor has been connected (the diagram displays
the selected wiring):
2 Wire
: The sensor is connected with only two wires. This is recommended
only for very short lines and high impedance sensors, otherwise the res-
ulting voltage drop across the circuits can lead to more substantial meas-
urement errors (cable resistance is factored into the measurement).
3 Wire
: The device attempts to compensate the voltage drop via the sup-
ply lines.
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devices, in particular, can thus lower sub-
stantially the measurement error relative to the 2-wire circuit.
4 Wire
: The recommended connection method for low impedance sensors
and/or longer supply lines. The loss of feed lines does not matter because
the device has a high-ohm input resistance (no voltage drop on the line
feeds) and the voltage drop (the measurement value) can be measured
directly at the sensor.
4.10.1.4
Resistance thermometer sensor type
97
Delphin Technology AG
Januar 2018
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