BERTHOLD TECHNOLOGIES LB 480, User Manual, Page: 302 / 450

54733-10BA2L
3 – 302
02.2017
1 HART
®
Communication Volume 3
1.3
Connection, Power On and Power Off
of the HART
®
Communicator
Risk of explosion!
In hazardous areas, a HART
®
Communicator may be connected
only under the following conditions:
– the current output of the measuring system SENSseries LB 480
is intrinsically safe
– the HART
®
Communicator is intrinsically safe
– the HART
®
Communicator has previously never be connected
to non-intrinsically safe live electric cables.
The communicator may be switched on only after it has been con-
nected to the HART
®
current output. Otherwise, communication
with the detector is not established.
For safe HART
®
communication you need an impedance of at least
250 to maximum 500ohms at the current output.
The Start menu appears as soon as the detector and the Communi-
cator have been connected and commissioned properly (see page
page 3-313 ).
From this menu you may directly select the item Live Display for
online display of the measured values. The measured data are only
valid when the probe was calibrated and configured.
The Communicator may be turned off or disconnected only after
completion of a possible parameter change of the detector.
1.4
Working with the HART
®
Communica-
tor
The Communicator is easy to use:
• Use the arrow keys to select a menu item and then press the
button with the right arrow key or the
ENTER key. Alterna-
tively, you can press the number listed in front of most menu
items on the numeric keypad; then the menu item is called
immediately.
• To change information or data, use the softkeys on which the
valid function is depicted, e.g.
SAVE, ABORT, OK, ENTER or
SEND . Push HOME to return to the Start menu (see chapter
2.3 , "Start Menu", page 3-313 ).
• Use the numeric keypad to enter numbers. With these keys you
can also enter text for some menu items by pressing the appro-
priate number key repeatedly.