414L-M-V3
RTD Input
Instruments with RTD inputs are identified by the Model
number
414LR
. A four wire temperature measurement is used
to give high accuracy and, internally, the software will
compensate for the non-linearity of the RTD. Details of the
installation are given in Section 7.2.
During calibration, a "temperature adjust facility" enables
the temperature reading to be adjusted.
This allows for
manufacturing tolerances on the RTD to be corrected.
4-20mA
A two wire 4-20mA input from a temperature transmitter or
density meter can be input to instruments with the Model
number designation
414LA
.
With a 4-20mA input, a linear relationship is assumed over the span
of the transmitter. The temperatures or densities at 4mA and
20mA are both programmable during the Calibration routine.
Temperature Compensation
33