VEGA VEGAPULS 41 4 … 20 mA; HART compact sensor - Manual (Page 62)

62 VEGAPULS 41 – 4 … 20 mA
26620-EN-041227
Supplement
3 Set-up
3.1 Mounting and installation
The prevailing plant conditions influence the safety of the measuring system. Therefore note
the mounting and installation instructions of the appropriate operating instructions manual.
3.2 Adjustment instructions and parameter adjustment
Adjustment instructions
The activation of the measuring system as safety-relevant subsystem is only possible via PC
adjustment programs. Not all safety-relevant parameters can be adjusted with the adjustment
module MINICOM. The set parameters must be checked and protected against unauthorised
access (password, screwed housing cover, …).
General instructions, see operating instructions manual
Parameter adjustment
The following software versions are required:
- Sensor software: from 4.50.00
- DTM-Collection: from 10/2003
With the adjustment program PACT ware™, the SIL parameter adjustment must be activated in
the Device Type Manager (DTM).
Note
If a reset is triggered on the sensor after the SIL parameter adjustment or if the failure mode =
22 mA is changed, the sensor will loose its SIL qualification.
3.3 Configuration of the processing unit
If the measuring system delivers output currents > 21 mA or < 3.6 mA, it must be assumed
that a failure has occurred.
The processing unit must therefore interpret such current values as a failure and trigger a
suitable fault signal.