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. . . ADDENDUM USE OF HARDWARE LINKS ON THE SECONDARY ELECTRONICS
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SPAN Raise/Lower
To enable this operation switch 1 must be moved up and down, that is:
Toggle switch 1 ON and OFF
Just rotate the Zero or Span local adjustment for 2 secs.
If you have an Integral digital display you receive the message.
URV ACT (for Upper range value active)
and then the URV VALUE with engineering unit is displayed:
- use ZERO to decrease the value
- use SPAN to increase the value
After 10 secs of non use of Zero or Span the operation terminates and the
message on the display is:
END and the URV is stored permanently. With no integral digital display
available you must read the analog output 4-20 mA during the setting.
DAMPING Raise/Lower
With switch 3 up in ON position, the ZERO and SPAN local adjustment can
be used for Damping Raise/Lower, for analog + HART version.
This function is always enabled for the analog only version.
So for the analog + HART version, put switch 3 up in on position.
In order the enable the Damping Raise/Lower option toggle switch 2 ON
and OFF. Rotate the ZERO or SPAN local adjustment for 2 secs.
If you have an Integral digital display you receive the message:
DAMP ACT
(for Damping Active)
and then you have the Damping value displayed:
- use ZERO to decrease the value (up to 0 secs)
- use SPAN to increase the value (up to 16 secs)
After 10 secs of non use of zero or span the operation terminates and the
message on the display is:
END and the Damping value is stored permanently.
It is suggested to have an integral digital display to perform this change for
damping.
SQUARE ROOT selection
This operation is available only for the analog version.
It can be used to select the square root output transfer function.
With the switch 4 down in off position the analog output transfer function
is linear.
By moving up switch 4 in ON position, you change the output transfer
function from linear to square root.
The square root function can only be defined for the default configuration
(see also square root (x) in the addendum for differential pressure
transmitter: selectable output function).
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