G
3 DTR. LI-24
(ENG
)
4.1. Electronic System
– block diagram.
SENSOR
INPUT
LOOPS
ISOLATION
SIGNAL
STANDARDIZATION
INTERFERENCE
ELIMINATOR
DC
GND
SHIELD
5
4
3
2
1
max
min
4mA
20mA
T
T
T
I
OUTPUT
-compensation
-linearisation
-forming signal 4 ... 20mA and Hart
DC
4 ... 20mA
Fig.1. LI-24 transmitter
– block diagram.
5. USE OF THE LI-24 TRANSMITTERS IN DANGER ZONES
5.1. List of norms.
The transmitters are made in according to the requirements of the following standards
:
EN 60079-0:2012+A11:2013, EN 60079-11:2012, EN 50303:2000.
The transmitters can be operated in explosion danger areas in accordance with the explosion-proof
construction symbol:
II 1G Ex ia
IIC T4/T5 Ga
I M1 Ex ia I Ma
FTZU 08 ATEX 0160X
5.2. LI-24 transmitters identification symbols.
Intrinsically safe transmitters must have a rating plate with the following data:
a)
The name of the producer;
b)
The LI-24 transmitter type;
c)
CE symbol and the Notified Body number; symbol;
d)
Explosion-proof construction index, certificate symbol as p.5.1;
e)
Input parameters values: Ui, Ii, Pi, Ci, Li and Uo, Io, Po, Co, Lo;
f)
Measurement range and output signal;
g)
Manufacture year and serial number;
and additionally:
h)
front rating plate with sign leads;
i)
warning plate with inscription:
„Don’t dry wipe”;
j)
leads signs.