Philips PM 6672 - Installation Instructions; General Installation and Safety

2. Installation Instructions
General information
This counter has been designed and tested in
accordance with lEC Publication, Safety Require
ments For Electronic Measuring Appartus For Class 1
Instruments, and has been supplied in a safe
condition. The present manual contains information
and warnings that shall be followed by the user, to
ensure safe operation and to retain the counter in a
safe condition.
Before connecting the counter to the line (mains),
visually check the cabinet, controls, connectors, etc,
to ascertain whether any damage has occurred in
transit. If any defects are apparent, 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 immediately. A
PHILIPS sales or Service organisation should also
be notified in order to facilitate the repair of the
counter.
External battery operation
(PM 6671 and PM 6672)
For field applications, PM 6671 and PM 6672 can
be operated from an external 11 .8...28Vd(s supply,
connected to the EXT BATT socket.
Connecting the counter to both the line and an
external battery at the same time, gives a power
back-up facility that maintains heating of the oven
oscillator and recharges the optional internal battery
pack PM 9693 when fitted.
Fuses
The counter is protected by a thermal fuse, located
in the line transformer and a secondary fuse, 1.6A
fast-blow (not PM 6670) on PCB U1. Remove the
line plug before fitting a fuse. Ensure that only fuses
of the specified type are used. If the counter is set
for operation on 11 5V line voltage, but is connected
to a 220V supply, the thermal fuse will blow im
mediately to protect the counter.
Grounding
The counter is connected to ground via a three-core
line 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, condensation may cause a hazardous
condition. Therefore, ensure that the grounding
requirements are strictly met.
Any interruption of the protective ground, inside
or outside the counter is dangerous. Line extension
cables must always have a protective ground
conductor.
Opening of the cabinet
The counter shall be disconnected from all voltage
sources before it is opened. If adjustment or main
tenance of the counter with the covers removed is
inevitable, it shall be carried out only by a qualified
person, who is aware of the hazard involved. Bear in
mind that capacitors inside the counter may still
retain their charge, even if the counter is discon
nected from all voltage sources.
Opening of the cabinet or removing of parts, except
those to which access can be gained by hand, is
likely to expose live parts and accessible terminals
that can be dangerous to life.
Line voltage setting
Before connecting the counter to the line, ensure that
it is set to the local line voltage. On delivery, the
counter is set to either 11 5V or 220V, as indicated
on the line voltage selector on the rear panel. If the
voltage setting is incorrect, set the line voltage
selector in accordance with the local voltage, before
connecting the counter to the line.
Type
Thermal fuse
1.6A fast-blow fuse 5x20mm
Service code
number
4822 252 20007
4822 253 20022
Operating position
The counter can be operated in any desired posi
tion. A fold-down tilting handle can be rotated and
locked in several fixed positions by first depressing
the knob in the centre of each hinge.
Front cover
The front panel controls and connectors can be
protected by a plastic snap-on front cover.
Cleaning the counter covers
The top and bottom covers, lacquered with suede
coating, need special treatment if the surface gets
soiled. The 3M Company has developed a "Doodle
bug Pad" (Catalog l^o. 8440) which when soaked
in water, ethanol or common household cleaning
agent, will penetrate holes and pores to restore its
former lustre.
Abrasive cleaning pads will result in surface
scratches. Although the Nextel suede coating is
ethanol resistant, it is susceptible to methyla
ted spirit, which could damage the surface due
to one of the denaturing substances present.