Funkwerk FC4 Operating Manual page 95

FC4 / FC4 Ex (HS) connected with Mobility Server
FC4 Ex (HS) – Supplementary safety information
Damaged units
Apparently or only presumably damaged units must never be introduced
into hazardous areas with potentially explosive atmospheres. If an
apparently or presumably damaged unit is present in a hazardous area
with potentially explosive atmospheres, it must be switched off
immediately and removed from the hazardous area. Unintended switching
GB
on and setting into operation again must absolutely be avoided.
Expiry of explosion protection operating permit (Ex certificate)
Any modification of the unit or of unit parts that has not been approved by
the manufacturer will invalidate the operating permit for this unit.
In that case, the unit must not be introduced into hazardous areas with
potentially explosive atmospheres or used there.
Use of headset in potentially explosive atmospheres
FC4 Ex
The use of headphones / headset with an explosion-proof unit version
FC4 Ex is not allowed!
To maintain the explosion protection, the sealing plug is permanently glued
into the socket. When this plug is removed, the operating permit for the
explosion-proof unit expires.
FC4 Ex HS
The explosion-proof handsets with the designation FC4 Ex HS may be
operated either with the headphones / headset, part no. 50 1010 5101 or
with headphones / headsets having their own explosion protection
approval.
The explosion protection of this FC4 Ex HS handset is limited to gas
explosion protection. When this handset is operated without headphones /
headset, the socket must be plugged with the original plug. Otherwise the
operating permit for the explosion-proof unit will expire.
Service adapter socket
On the rear of the explosion-proof unit, a service adapter socket is
provided which in the ex-works condition is plugged with a rubber plug.
The explosion-proof unit may only be brought into hazardous areas with
potentially explosive atmospheres and operated there when the service
95