WARNING
Undetected failure in devices with functional safety
Note the following:
● For the maximum current output signal to be output, set the measuring range within the
maximum permissible measuring span. You can find the maximum permissible measuring
span of your measuring cell in the section Technical data (Page 199).
● Note that a saturation limit > 21.5 mA increases the risk of undetected failures. (Page 162)
● When you configure your process control system, the analog input must distinguish
between the measured value at saturation (current is ≤ 21.5 mA) and high fault current
(current is ≥ 22.0 mA).
9.2.13
SV selection [15]
Sets a measured value as a secondary variable (SV).
Setting range:
TEMP
Sensor temperature
ETEMP
Electronics temperature
LEVEL
Level
VOL
Volume
VFLOW
Volume flow
USER
Custom
MFLOW
Mass flow
Factory setting:
As specified in order
9.2.14
Units [16]
Introduction
Depending on the application of the device that you have selected using the "Application"
parameter, you have the option of selecting a unit:
● Level
● Volume
● Volume flow
● Mass flow
The selected unit is displayed in the measurement view.
Use the remote operation to set the associated unit for the "Customized characteristic curve"
application.
Parameter assignment
9.2 Parameter assignment over device with display
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC
127