3.1.6
Warning and Other Symbols
Certain important functions are identified by
pictographs as follows:–
s
Protective Earth (used internally only)
Y
Functional Earth (Ground)
d
Alternating Current
A
Attention, Consult accompanying
Documents
f
Danger High Voltage
e
Type BF. The IEC 601-1 symbol for type
BF equipment with isolated applied parts.
B
Type B. The IEC601-1 symbol for type B
equipment.
3.2 Disclaimer
Oxford Instruments
considers itself responsible for
the effects on safety, reliability and performance of
the equipment only if :–
Modifications and repairs are carried out by
persons expressly authorised by
Oxford
Instruments .
The equipment is used in accordance with the
instructions in the User Manual or this Workshop
Manual.
3.3 Signal Cables
High quality screened cables must be used when
connecting to the auxiliary input/output connectors
of Synergy mobile to ensure compliance with
EMC regulations. Braid screened or double
screened (braid plus foil) cables are the preferred
types. The cable screen should make a 360°
connection to the screening shells of the
connectors on each end of the cable.
3.4 Installation
3.4.1
Inspection
Check that there are no obvious defects or damage
to the PC tower, Isolation transformer / Power
Supply, the amplifier, control box any other cables
or accessories.
3.4.2
Mains Supply Cable
Check that the mains supply cable is fitted with a
shrouded 3-pin mains connector (female) which
mates with the appliance inlet at the back of the
Isolation transformer / Power Supply.
Check that the free end of the mains supply cable
is fitted with a suitably rated mains plug having
protective earth connection. The wires are colour
coded as follows:
Brown
= Line
Blue
= Neutral
Green/Yellow = Protective Earth
It is essential that the protective earth conductor is
connected to an external protective earth system to
ensure patient safety and correct operation of the
unit. This protection is automatic in three-wire
mains systems if the mains plug has been correctly
wired.
3.4.3
Voltage selectors
It is vital to set the mains selector switches on the
Isolation transformer / Power supply for the
local mains voltage. The switch marked
I
must
be set to suit the mains input voltage 100V-120V
or 200V-240V. The
X
switch sets the output
voltage of the six isolated mains outlets
100V-120V or 200V-240V. Both switches must be
set to the same voltage. The switches can be
altered by removing the two screws that secure the
cover plate.
Set the switches as required then the cover plate is
refitted.
The label adjacent to the switches indicates the
required settings.
It is vital to set the mains input selector switch
on the PC tower for the local mains voltage 115V
or 230V. This selector switch is located above the
mains inlet on the back of the PC tower.
Note :- Some PC towers made by HP may not
have a mains input selector switch. These units
have a mains voltage auto sensing and selection
circuits for mains voltages from 100-127V and
200-240V.
3.4.4
Fuses Isolation transformer / Power
supply
Check that the value of mains fuses F1 and F2, is
correct for the local mains voltage. The fuses are
located on the Isolation transformer / Power supply
just below the main on / off switch. The label
adjacent to the fuses indicates the required rating
for the mains voltage. The ratings are shown in the
following tables.
Issue A May 1998
INSTALLATION AND OPERATION
Chapter 3 Page 6
Synergy Mobile Workshop Manual