Appendix F: Approvals; Namur Recommendation Ne 43 - Siemens Pointek CLS500 Operating Instructions Manual

Appendix F: Approvals

The operation of Pointek CLS500 conforms to the following:

NAMUR recommendation NE 43

This recommendation describes rules by which analog transmitters transfer their
information to DCS equipment. This information can be divided into two types:
• measurement information
For measurement information the current signal should be within the range of
3.8 to 20.5 mA.
• failure signalling
For failure information which indicates a failure in the measuring system
current signal should be in the range of either 0 to 3.6 mA, or 21 mA or greater.
The application will determine which of these two ranges is more desirable.
Pointek CLS500 can be set for 3.6 mA, or 22 mA, as required.
1.
It may also signal a process level outside the Upper and Lower Sensor Limits, if
the unit has been programmed for this. For more information, see
Signalling
on page 13.
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