BERTHOLD TECHNOLOGIES LB 480, User Manual

Page: 39 / 450

SENSseries LB 480
BERTHOLD TECHNOLOGIES GmbH & Co. KG
1 – 39
Volume 1 5 Explosion Protection
1
5.6.4 Commissioning
• The HART
®
Communicator used must be capable of operating
within the respective Ex zone.
• For intrinsically safe current output, the HART
®
Communicator
must also be intrinsically safe. The level of protection (ia, ib, ic)
of the Communicator must be at least the level of protection of
the installed circuit.
5.6.5 Protection Principle Ex-d/-e/-t and XP
• Do not open the terminal compartment while voltage is applied.
• If there is an explosive atmosphere:
Waiting time before opening the electronics compartment after
turning off the power supply: 2 minutes.
• Continued operation is not allowed if:
–
the detector is damaged
– threads on the housing are corroded
– the detector housing is badly corroded
– dummy plugs are badly corroded or damaged
– cable glands are corroded or damaged
– adapters are badly corroded or damaged
– seals are damaged, show visible aging, or settlement.
5.6.6 Protection Principle Ex-d/-e/-i/-t
(intrinsically safe current output)
When opening the terminal compartment during operation, please
keep in mind:
• The housing cover may only be opened for a short time for
repair and maintenance.
• The semicircular cover (Ex cover) must remain closed as long
as the supply voltage is applied.
• Please proceed as described in chapter 5.2.4 if the non-intrinsi-
cally safe part of the terminal compartment is to be opened.
Waiting time before opening the Ex-e cover after turning off the
power supply: 2 minutes.