Philips 6652C - Page 13

General information
This counter has been designed and tested in ac-
cordance with IEC Publication 348, Safety Requi-
rements
For Electronic Measuring Apparatus For
Class 1 Instruments, and has been supplied in a
safe condition, This manual contains information
and warnings that should be followed by the
user to ensure safe operation and to keep the
counter in a safe condition.
Before connecting the counter to the line
(mains), visually check the cabinet, cant rols,
c-onnectors, etc, to ascertain whether any damage
has occurred in transit. If any defects are ap-
parent, do not connect the counter to the line,
All components on the primary side of the line
transformer are CSA approved and should only be
replaced with original parts.
In the event of obvious damage, missing parts or
if the safety of the counter is suspected, a
claim should be made to the carrier immediate-
ly. A PHILIPS Sales or Service organisation
should also be notified in order to feci lit ate
the repair of the counter.
Grounding
The counter is connected to ground via a sealed
three-core 1 ine cable, which must be plugged
into a socket outlet with a protective ground
contact. No other method of safety grounding is
permitted for this counter. When the counter is
brought from a cold to a warm environment, con-
densation may cause a hazardous condition.
Therefore, ensure that the grounding require-
ments are strictly met,
Any interruption of the protective ground, in-
side or outside the counter, is dangerous. Line
extension cables must always have a protective
ground conductor,
Opening of the cabinet
The counter must be disconnected from all vol-
tage sources before it is opened. If adjustment
or maintenance of the counter with the covers
removed is inevitable, such maintenance must be
carried out only by a qualified person. Bear in
mind that capacitors inside the counter may
still retain their charge, even if the counter
is disconnected from all voltage sources.
Opening of the cabinet or removing of parts, ex-
cept those to which access can be gained by
hand, is likely to expose live parts and acces-
sible terminals that can be dangerous to life.
Line voltage setting
Before connecting the counter to the line, ensu-
re that it is set to the local line voltage. On
delivery, the counter is set to either 115V or
230V, as indicated on the line voltage selector
on the rear panel (note that the selector shows
220V). If the voltage setting is incorrect, set
the line voltage selector in accordance with the
local voltage before connecting the counter to
the line.
WARNING: If the counter has accidently been con-
nected to a 230V supply when set to 115V, an in-
ternal safety circuit and the line (mains) Fuse
will blow. These components have to be replaced
afterwards. See service manual.
External battery operation
For field applications, the PM 6652 and PM 6654
can be modified for 24V DC on request. Use cable
connector 4822 266 20014.
Note: Center pin in the connector should have
+ polarity.
Fuses
The counter is protected by two fuses. The pri-
mary fuse has to be changed when the mains vol-
tage setting is changed. For 230V use a 0.4A
delayed action fuse and for 110V use 0.8A de-
layed action. The secondary fuse on t.he PC-board
unit 2 shall be a 4A fast act ion. Remove the
line plug before fiUing a fuse. Ensure that
only fuses of the specified type are used.
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