FISCHER Mess- und Regeltechnik GmbH
Commissioning | 4
BA_EN_DE49_0
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4.3.7 Function selection
The parameter allows you to select between the following functions:
•
f
=0
The device works as a linear transmitter.
•
f
=1
causes a rooting of the output signal and the display.
•
f
=3 … 30
causes linearization of the output and display based on a support point
table.
NOTICE
Changing the parameter value
Whenever you change the value from
f
the program creates a new table. All
previous values in the table are rejected and replaced with new linear entries.
Rooted output signal
f
=1 causes a rooting of the output signal and the display. The menu shows the
parameters
dpf
,
maf
,
mef
and
med
. The display can be scaled infinitely with
these parameters. The measured value is displayed without a unit and can
therefore be assigned to any unit (free unit).
• The measuring range defined by the parameters
ma
and
me
is converted to
maf
and
mef
.
• The value of
dpf
determines the position of a decimal point.
• The value must be set from
med
to 0.
Support point table
f
=3 … 30 causes linearization of the output and display based on a support
point table.
Also, a parameter
lin
is shown behind which there is a submenu for entering
value pairs of the support point table. This submenu has its own entry and exit
point that is shown with End. The table is only saved if you return to the main
menu at precisely this point, i.e. if you change to the parameter
lin
in the main
menu again via the key
û
.
If the table is not structured correctly, an error message
err
will appear here
and you cannot quit the submenu.
The table comprises 3...30 pairs of values. The first value pair is
i-01 P-01
(
)
.
• The value
i-01
defines the display value of the output signal level.
• The value
P-01
determines the associated pressure.
• Followed by the pairs of values ... (
i-02
|
P-02
) … (
i-30
|
P-30
).
The output is proportional to the display value.
The table is correct if the following applies for all signal values: The value is lar-
ger than the previous value. Either larger (rising characteristic curve) or smaller
(falling characteristic curve) apply to the pressure values accordingly. No trans-
ition from rising to falling characteristic curves or vice versa is allowed.
