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“r5” in the “AL” secondary menu and set the parameters as follows:
A.on = L.75, A.oF = L.85, dEL = 20.
Example 4: if an alarm is to be activated when the active power goes over
135kW, with an hysteresis equal to 8kW, and a delay of 10 seconds
(according to what has been written for A.on > A.oF), then select "r1 in the
“AL” secondary menu and set the parameters as follows:
A.on = 135, A.oF = 127, dEL = 10.
FiL
: selection menu of the digital filter's parameters.
This function allows you to stabilize the value of the instantaneous
measurement retransmitted by the transducer when the value is not
stable enough from the beginning and will not therefore allow either a
clear reading on the instruments connected to the output or a good control
by the alarm set-point.
Fi.S
: activation range of the digital filter.
This value is programmed within the range: 0
≤
Fi.S
≤
99.9. The
programmable numerical value represents the fluctuation range (ripple)
of the value which has been measured and retransmitted by the trans-
ducer. In the first configuration phase this value must be equal to "0" and
the right value is to be entered only after the verification of the possible
fluctuation. The value of this parameter can be calculated by the below
indicated formula or entered step by step after checking the output ripple.
The formula to be used is the following:
Ripple (%) = 100.000 x
∆
R x (Hi.E - Lo.E)
AFS x FSO (Hi.A - Lo.A)
where:
AFS = electrical full scale value "Hi.E" automatically calculated by the
transducer;
FSO = maximum full scale of the analogue output (20mA, 10V, etc.);
∆∆
R = fluctuation of the analogue output value (mA or V);
Hi.E = maximum manually programmed electrical scale value;
Lo.E = minimum manually programmed electrical scale value.
If the Lo.E and Hi.E parameters have not been changed from the original
(Lo.E = 0, Hi.E = AFS), the formula becomes:
Ripple (%) = 100.000 x
∆
R
FSO (Hi.A - Lo.A)
Note: if the "Hi.E" parameter has been changed and the operator doesn't
remember the original value (the one which is automatically calculated by
the transducer) it can be displayed again by changing the actual "rEt"
parameter with any other parameter, confirming the new selection (from r1
to r11) with the “S ” key and subsequently entering the “rEt” secondary
menu, this time selecting the desired measure. The value subsequently
displayed by the "Hi.E" parameter will be the value automatically calculated
by the transducer (AFS). Example: if the fluctuation of the analogue output
is 0.5mA (ÐR), which is the ripple calculated to be entered as Fi.S value?