IDEAL
-
P
KOSMOS SERIE
www.ditel.es
14
DISPLAY CONFIGURATION
dSP
SCAL
tEAC
FiLt
The second menu corresponds to display configuration. This menu, in turn, consists of some submenus according
to previously programmed input type: through frontal keys configuration (
SCAL
), through real input signal
(
TEACH
) (
tEAC
), and reading stabilization filter (
FiLt
).
Display Programming
THROUGH FRONTAL KEYS CONFIGURATION
“
SCAL
”
Input and display values are configured
manually through
the three keys
of the instrument. This method is suitable
when signal values supplied by the transducer at each
extreme point of the process are known.
REAL INPUT SIGNAL CONFIGURATION
“
tEAC
”
Input values are
directly introduced from CN2 input
connector just at the moment of signal capturing at
each point of the process
. Display values are configured
manually through the three keys, as in the previous case.
This method is suitable when signal values at each point are
unknown but, it is possible to lead process to the conditions
defined by these extreme points.
WEIGHTED AVERAGE FILTER
“
FiLt
”
Sets low
-
pass filter cutoff frequency (Fc) which allows the instrument to smooth out undesirable display reading
fluctuations.
Display scaling
Display scaling is necessary when adapting display reading to a particular engineering unit. Display range can be
configured between
-
9999
and
9999
.
Display scaling is a linear process that consists in introducing two input values, referred as
Input 1
and
Input 2
,
and their respective display values, referred as
Display 1
and
Display 2
. On the basis of this proportional
relationship internal software calculates display value that would correspond to a given input value. Decimal point
position would complete required engineering units indication.
It is possible to scale display in an increasing or decreasing proportional mode depending on whether if second
display value (
DISP.2
) is higher or lower than the first (
DISP.1
). In an increasing mode, display value increases
proportionally to the input value whereas in a decreasing mode, display value decreases. The left figure below
shows both scaling modes.
IMPORTANT IN
“
tEAC
”
MODE:
To ensure the best accuracy, both points 1 and 2
should represent extreme process limits.
The right figure shows an
example for a 10 bar
pressure sensor with a 4
-
20mA
output
signal.
Decimal point is situated
between second and third
digit of the display.
(10.00)
DISP.2
(00.00)
DISP.1
(04.00)
INP.1
(20.00)
INP.2
Increasing proportional mode
Decreasing proportional mode
DISPLAY 2
DISPLAY 1
DISPLAY 1
DISPLAY 2
INPUT 1
INPUT 2
INPUT 1
INPUT 2
