TMT84 11 Operation using PROFIBUS
®
PA
Endress + Hauser 75
11.3.2 Group Communication
Changing the unit
The system unit for the temperature can be changed in the Sensor 1 or Sensor 2 menu for the chan-
nel in question.
Changing the unit does not initially have any effect on the measured value transmitted to the auto-
mation system. This ensures that there are no sudden changes in the measured values that could
have an effect on the subsequent control routine.
Poly. coeff. A read/
write
Sensor linearization of copper/nickel resistance thermom-
eters (RTD).
! Note!
The Poly coeff x parameters are used for calculating the
response curve if "RTD polynomial nickel or RTD polyno-
mial copper" is set in the Characterization Type n
parameter.
Factory settings:
Polynomial coeff. A
Copper = 0.00428
Nickel = 5.4963E-03
Polynomial coeff. B
Copper = 6.2032E-07
Nickel = 6.7556E-06
Polynomial coeff. C
Copper = 8.5154E-10
Nickel = 0
Poly. coeff. B read/
write
Poly. coeff. C read/
write
Sensor serial
number
read/
write
Serial number of the connected sensor.
Communication
Menu item Parameter
"Communication" Name
Parame-
ter access
Description
Bus address read Displays the device bus address.
Factory settings:
126
Special linearization 1 / Special linearization 2
Menu item Parameter
"Sensor"
Submenu
"Special lineariza-
tion n"
Name
Parame-
ter access
Description
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