ABB Platinum standard Series, Инструкция по эксплуатации

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INSTALLATION
SETUP AND PHYSICAL INSTALLATION
3 - 14 WBPEEUI110504A0
NOTES:
1.
The equation for load resistance is based on a maximum output
of 20 milliamperes with the - (negative) TEST terminal jumper screw
tightened. In some cases (initialize high, fail high, overpressure con-
ditions, etc.) the output may be higher. If this value is known, it can
be used in the denominator of the equation instead of 0.02.
2. If the - (negative) TEST terminal jumper screw is loosened
½-turn the minimum supply voltage is 12.7 VDC.
3. If using the optional lightning arrestor, add 0.4 VDC to all mini-
mum supply voltage values.
The power supply and load resistance are variable over the
entire operating region shown in Figure
2-4 .
Figure 3-9. Closed Tank, Condensing
Atmosphere Level Measurement
T 02 22 3 A
h = M A X . LE V E L TO B E M E A S U R E D
3
F ILLE D
LIN E
3-VA LV E
M A N IF O L D
P L U G G E D
F ILLIN G T E E
+
–
h
3
h
2
h
1
h – h
2 1
20
15
10
5
0
-250
(-6 2.2)
D IF FE R E N TIA L P R E S S U R E
IN . H O (kPa)
2
+ 250
(+ 62.2 )
4
S PA N = h x S G
3
Z E R O E LE VAT IO N
= (h -– h ) x S G
2 1
R
max
V
12.00 –
0.02
----------------------- =