ARDETEM TPI-SI 40 Series, Руководство пользователя

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p15
Note1: The values of the abscisses (x) must go increasing : value of X00
< value of X01...
Note2: In special linearisation and in mode transmitter (SCALE NO), the
displayed measure is the measure linearised by the programming of the
points. The undeformed input measure can always be accessed with the
function direct measure (see p20) on the µconsole or on the variable
Input on the software.
Example :
For a layed cylindric tank, 1 meter high (h) and 1 meter long (l); a 0-20
mA linear sensor measures the height of the liquid surface line :
0 meters -> 0 mA (empty tank) 1 meter -> 20 mA (full tank)
with cos β /2 = ( R - h ) / R a n d sin β /2 = C/2R
Volume of the empty tank = 0.000
Volume of the full tank =0.785
Volume = L [
π
R² β /360 - C(R-h)/2]
β
(R)
L (length)
C (chord)
R (ray)
h
(height)
Height
mA
X00 0
X01 2
X02 4
X03 6
X04 8
X05 10
X06 12
X07 14
X08 16
X09 18
X10 20
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0.00
73.74
106.26
132.84
156.93
180.00
203.07
227.16
253.74
286.76
360.00
0.00
0.60
0.80
0.92
0.98
1.00
0.98
0.92
0.70
0.60
0.00
Height
m
Degree
Chord
m
Volume
m3
Outputs
in mA
0.000
0.041
0.112
0.198
0.293
0.393
0.492
0.587
0.674
0.745
0.785
Y00
Y01
Y02
Y03
Y04
Y05
Y06
Y07
Y08
Y09
Y10
00.00
01.04
02.85
05.04
07.47
10.00
12.54
14.96
17.17
18.98
20.00
That is to say a curve of 10 equally long segments:
Measure range / number of segments = 20mA/10 = 2mA length of the
segment.
For 10 segments nb = 11 (number of linearisation points).
Programming:
dINP = 0 mA = X00
F.INP = 20 mA = X10
nb = 11
d.disp = 0,000 m3 =Y00
F.disp = 0.785 m3 =Y10
Programming from X00 to
X10 and from Y00 to Y10
according to the table.
0 2 4 6 8 10 12 14 16 18 20
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
0 1 2 3 4 5 6 7 8 9 1 0
20
18
16
14
12
10
8
6
4
2
0
0.785
0.745
0.674
0.587
0.492
0.393
0.293
0.198
0.112
0.041
0.000
volume
in m3
output (mA)
Y
X
input (mA)
height (m)
indice of X
4.7 Output features and programming limits
4.7.1 Analog output
(TPI-SI 4x)
and
(TPI-SI 44x)
Current output 0/4-20mA
•
Accuracy 0.1 % in relation to the display (at +25°C)
• Residual ripple ≤ 0.2%
• Admissible load 0 Ω ≤ Lr ≤ 500 Ω (current)
• Programmable scale ratio with enlarging effect
•
Response time : 40 ms in relation to the display
Analog output down scale (eg. 04.00 (4mA))
Analog output full scale (eg. 20.00 (20mA))
Display value corresponding to the output down scale
Display value corresponding to the output full scale
In mode measuring, the analog output can not overstepp 10% of the
greatest of the 2 values : dOUT and F.OUT
ANA
ANA 2
ANA
1
(
TPI-SI 4x
) (
TPI-SI 44x
)
F.OUT
dOdI dOd2
F.OdI F.Od2
dOd
1
F.Od
1
dOUT
F.OU 1
dOU 1
F.OU2
dOU2