User Manual

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FOR UNITED KINGDOM ONLY
NOTE: This lead/appliance must only be wired by competent persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with
the following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live(Phase)
As the colours of the wires in main leads may not correspond with the colours
marking identified in your plug/appliance, proceed as follows:
The wire which is coloured Green & Yellow must be connected to the Earth
terminal marked with the letter E or by the earth symbol
or coloured Green
or Green & Yellow.
The wire which is coloured Blue must be connected to the terminal which is mark
with the letter N or coloured Blue or Black.
The wire which is coloured Brown must be connected to the terminal mark with
the letter L or P or coloured Brown or Red.
If in doubt, consult the instructions provided with the equipment or contact the
supplier.
This cable/appliance should be protected by a suitably rated and approved HBC
mains fuse : refer to the rating information on the equipment and/or user
instructions for details. As a guide, cable of 0.75mm² should be protected by a 3A
or 5A fuse. Larger conductors would normally require 13A types, depending on the
connection method used.
Any moulded mains connector that requires removal / replacement must be
destroyed by removal of any fuse & fuse carrier and disposed of immediately, as a
plug with bared wires is hazardous if an engaged in live socket. Any re-wiring
must be carried out in accordance with the information detailed on this label.
MULTI-OUTPUT POWER SUPPLY
USER MANUAL
1
1. INTRODUCTION
The regulated DC power supply series is designed to be used in applications such as
powering operational amplifier, push-pull stages, logic circuit and definition systems where
plus and minus voltages are required to track with an insignificant error. To represent an
operation convenience, GPS-4302, GPS-4303 and GPS-4251 have four independent power
supplies (while GPS-2303 has two and GPS-3303 has three) housed in a single package.
GPS-4302, GPS-4303 and GPS-4251
consist of four identical, independent,
adjustable DC power supplies (while two for GPS-2303 and three for GPS-3303). A front
panel switch selects one of three operation modes of independent, series and parallel. In the
independent mode, the output voltage and current of each supply are controlled separately,
and each supply is isolated up to 300V from output to chassis or output to output. In the
tracking mode, both outputs are automatically connected in series or parallel, and the
controls of the left supply adjust the magnitudes of both the positive and negative output
voltages. Because the outputs are connected in a tracking configuration, any internal
disturbance in the master supply (such as drift or ripple) will cause an equal percentage
change in the outputs of both the supplies.
Each power supply (except CH3 for GPS-3303 and CH4 for GPS-4302&4303&
4251)
is a completely transistorized, well-regulated, constant voltage/constant current supply that
will provide full rated output voltage at the maximum output current or can be continuously
adjusted throughout the output range. The front panel current controls can be used to
establish the output current limit (overload or short circuit) when the supply is used as a
constant voltage source (independent or tracking modes) and the voltage controls can be
used to establish the voltage limit (ceiling) when the supply is used as a constant current
source (independent mode only). The supply will automatically cross over from constant
voltage to constant current operation (current limited operation in the tracking mode). Each
power supply (CH1~CH4) has its own front panel meter that can measure output voltage or
current. One power supply may be used as a CH1 supply controlling, one CH2 supplies
furnishing various voltage or current for a system. When operate with the front panel mode
switch in the tracking position, the instrument is automatically internally connected in
auto-tracking configuration.
For audio production line, the continuous or dynamic load can be internally selected.
When the connector (J111&J309) is connected to “ON” position the unit is suitable for
audio power Amplifier application (Normal setting to “OFF” position).