40
6 Set up with the display and adjustment module
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-130430
You can choose whether the sensor should output modulated current
(dithering) or the set fault current in case external radiation appears.
In the case of modulated measuring current (dithering), the last
valid current value is maintained and the current output modulates a
square-wave voltage ±1 mA around this value.
In this menu item you can activate the relay output and determine its
function as well as the switching points.
When the output of the process values is set, you can choose be-
tween overfill and dry run protection.
The relay outputs of the sensor react accordingly.
The following reference values can be selected:
•
None - Relay operates as fail safe relay
•
Electronics temperature
•
Process value
"No" reference value means that the relay output operates as fail safe
relay.
Example for the adjustment of the process value
Caution:
Independent of the selected reference value, the relay will deenergize
in case of failure.
With this menu item you safeguard the sensor parameters against
unauthorized or unintentional modifications.
This menu item is described in the operating instructions manual
"
Display and adjustment module
".
Display
With this parameter you can change the display language.
This parameter is described in the operating instructions manual
"
Display and adjustment module
".
Setup/Relay
Lock setup/adjustment
Display/Language
