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Maximum length of guide tubes
According to the length and the execution of the guide, transmitters ADF must possibly
fixed with bottom of the tank.
Electrical connection
The voltage must be disconnected when electrical connections are being carried out in
the terminal connection box.
The type of protection depends on appropriate choose and installation of cable glands
and blanking elements. Only cable glands with existing, separate EC-type examination
certificates corresponding to EN 60079-0 and EN 60079-1 are applicable. These certified
components have to at least fulfil minimal requirements of temperature range as the
temperature range of the level transmitter gauge. It has to be considered to use
appropriate type and size of threads as the type of apparatus' threads. Use of individual
conductor strands is not permissible!
AF-ADF and AVK-ADF Level transmitters must only be operated on electrical power
circuits with maximum levels as follows:
Without signal converter
U
≤ 28 V, I ≤ 120mA
With signal converter
U
≤ 28 V-I <120 mA- P ≤ 0,8 W
*
When using a head-mounted transmitter, please note the following: If the electrical data of the head-
mounted transmitter are lower than those listed above, the electrical data of the head-mounted transmitter
shall be binding.
Level Sensor AF-ADF and AVK-ADF
II 2 G Ex d IIC T6 Gb
II 2 D Ex tb IIIC T80°C Db
The electrical data on the type plate and the additional regulations governing electrical circuits must be
complied with. This work must be done by trained specialist personnel.
The electrical connection of
the Level Sensors is realized
with integrated terminals. See
the connection diagram inside
the terminal box
for example:
Figure 1
– Level Sensors without head-
mounted transmitter.
Figure 2
– Level Sensors with head-
mounted transmitter.
Figure 1
blue brown
black
top
100%
Figure 2
R
I
-
+
A
4 - 20mA
botton
0%
12 - 30V DC
EEx ia / EEx ib
Internal circuuit diagram
Calibration
On the Sensor no re calibration is required. In the case of an installed head mounted transmitter, this
transmitter has already been adjusted at the factory to the reed measuring chain. Additional adjustments
are usually not required.
