Distillation Process Analyzer DPA-4.5
Faults
Securing against being switched
on again
DANGER
Danger of death due to unauthorized restarting
During work to rectify faults, there is the danger
that the power supply can be switched on without
authorization. This poses a life-threatening hazard
for the persons in the danger area.
For this reason:
– Before starting work, switch off all power supplies
and secure them against being switched back on.
Explosion protection
WARNING
Explosion protection is no longer provided
when the pressure monitor is switched off
The control box contains ignition sources.
Operating the device when the pressure monitor of
the control box is deactivated can result in
explosions in potentially explosive atmospheres.
For this reason:
– Never deactivate the explosion protection during
normal operation. Leave the key switch in the
Explosion protection On
position.
– Deactivation of the explosion protection
(
Explosion protection Off
position) is solely
intended for service work. No potentially
explosive atmosphere may be present during this
time.
– After performing service work, close the control
box carefully with the aid of the two catches and
switch on the pressure monitor again using the
key switch.
WARNING
Loss of explosion protection in the event of a
fault
The device contains ignition sources. Faults which
affect explosion protection can result in a
potentially explosive atmosphere being ignited.
For this reason:
– With faults that affect explosion protection,
disconnect the device from the current supply
using the emergency off and interrupt material
flows by closing the valves.
– Make sure that no ignition sources are brought
into the area while faults are being rectified.
December 2013
115