User manual - METER PDU-4x0-W
Figure. 10.4 Example of user defined characteristic
10.1.5.
Volume characteristics of a cylindrical tank
Volume characteristics of a cylindrical
tank is defined by parameters of tank (see menu
”inPt”
). Normalized input is proportional to level 'h' and linear scaling by parameters: "
t Sn"
,
"t
Sh"
(for normalized input value equal 0, displays value
"t Sn"
and for normalized input value
equal 1, displays value
"t Sh"
+
"t Sn"
(Figure 10.5).
The linear scaling can be expressed as follow:
h=I
n
·"t Sh"+"t Sn"
where 'h' is level of liquids, gases or solids in the tank, see Figure 7.1, 7.2.
Figure 10.5 The characteristic of level of liquids, gases or solids in tank depending on input
current in 4÷20mA range.
42
D
is
pl
ay
ed
v
al
ue
Prąd wejściowy [mA]
0
4
8
12
16
20
Y (PH)
0
0,2
0,35
0,5
0,7
1
0,9
Y (PL)
X = „20.0.”
X = „35.0.”
X (PL) = „50.0.”
X (PH) = „70.0.”
X = „90.0.”
X = „100.0.”
Input current [mA]
Normalized measurement I
n
(for 0-20 mA range)
5-elements characteristic
L
e
v
e
l
'h
'
Input current [mA]
0
4
8
12
16
20
”t Sh”+”t Sn”
”t Sn”
