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Pointek CLS500 – INSTRUCTION MANUAL
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Appendix F
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
1
the
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