CARLO GAVAZZI LDI 35 - CONFIGURATION SOFTWARE Instrukcja Użytkownika Pobierz pdf (Strona 22)

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nE : normally energized coil.

FiL : menu to program the digital filter’s parameters.

This function allows you to solve two different kinds of problems:

• stabilize the value of the instantaneous measurement displayed by

LDI35 when the value is not enough stable from the beginning and would

not therefore allow either a clear reading on the display or a good control

by the alarm set-point (if present);

• allow an amplitude of the displayed scale as regards to the electrical

one >2.

An example of how the electrical scale is to be used can be the

measurement of a process signal from a transmitter: 0 to 20mA, 4 to

20mA, 0 to 10V, 0 to 5V, 1 to 5V and so on, which can correspond to a

pressure, humidity, temperature, etc. In this case the measured signal

managed by the electrical scale (see “Lo.E”, “Hi.E”) has a numerical

value which is completely different from the one of the displayed scale

(see “Lo”, “Hi”).

Fi.S : programming of the activation range of the digital filter. This value

is programmable within the range: 0 ≤ Fi.S ≤ 1999/9990.

The programmable numerical value represents the fluctuation range of

the value which has been measured and displayed by LDI35. In the first

configuration phase this value must be 0 and the right value is to be

entered only after the verification of the possible fluctuation.

Example: the measured instantaneous value varies from 1204 to 1210,

and the value to be entered as “Fi.S” is 6 (1210 - 1204).

Fi.C : programming of the value of the filtering coefficient. Value to be

programmed within the range: 1 ≤ Fi.C ≤ 255.

The higher “Fi.C”, the higher the filtering of the measured value and the

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CARLO GAVAZZI LDI 35 - CONFIGURATION SOFTWARE Instrukcja Użytkownika Strona 22