User manual for meter with U/I input SRP-77
10.1.1.
Linear characteristic
The normalized result is converted by fixed coefficients determined by
“Lo C”
and
“Hi C”
parameters (when the normalized results is equal 0, then value
“Lo C”
is displayed, and when
the normalized results is equal 1, then value
“Hi C”
is displayed). Expression presented below
shows the manner of result calculation:
W
=
I
n
×
"Hi C"
−
"Lo C"
"Lo C" ,
where
W
means the displayed value.
The value of the
“Lo C”
parameter can be higher than the value of
“Hi C”
parameter. In such a case, for an increasing value of input current the displayed
value decreases.
Figure. 10.1 Normal („Lo C” < ”Hi C) and inverted („Lo C” > ”Hi C) characteristic
10.1.2.
Square characteristic
The normalized result is squared and further conversion is done as for linear characteristic.
Conversion is made accordingly with the expression:
W
=
I
n
2
×
"Hi C"
−
"Lo C"
"Lo C" ,
where
W
means the displayed value.
Figure. 10.2 Normal („Lo C” < ”Hi C) and inverted („Lo C” > ”Hi C) characteristic
34
D
isp
la
ye
d
va
lu
e
Input current [mA]
0
4
8
12
16
20
Hi C
Lo C
D
isp
la
ye
d
va
lu
e
Input current [mA]
0
4
8
12
16
20
Lo C
Hi C
D
isp
la
ye
d
va
lu
e
Input current [mA]
0
4
8
12
16
20
Lo C
Hi C
D
isp
la
ye
d
va
lu
e
Input current [mA]
0
4
8
12
16
20
Hi C
Lo C
i
Содержание Simpact SRP-77
Страница 47: ...User manual for meter with U I input SRP 77 47...
