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Mains Operating Voltage
This instrument has a universal input range and will operate from a nominal 115V or 230V mains
supply without adjustment. Check that the local supply meets the AC Input requirement given in
the Specification.
Mains Lead
When a three core mains lead with bare ends is provided this should be connected as follows:
BROWN
BLUE
GREEN/YELLOW
When fitting a fused plug a 5 amp fuse should be fitted inside the plug. As the colours of the
wires in the mains lead of this apparatus may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
The wire which is coloured green-and-yellow must be connected to the terminal in the plug which
is marked by the letter E or by the safety earth symbol shown above or coloured green or green-
and-yellow.
The wire which is coloured blue must be connected to the terminal which is marked with the letter
N or coloured black.
The wire which is coloured brown must be connected to the terminal which is marked with the
letter L or coloured red.
Any interruption of the mains earth conductor inside or outside the instrument will make the
instrument dangerous. Intentional interruption is prohibited.
All connections are made from the front panel.
The load should be connected to the positive (red) and negative (black) terminals marked
OUTPUT. Connect to one or both outputs as appropriate for the selected Mode, see Operation
section.
The terminal marked
The operation of both outputs is identical in Mode A (independent mode); the following description
applies to both. In Mode B and Mode C only Output 2 is active and Output 1 is disabled; the
description therefore only applies to Output 2, see Mode Selection section.
Setting Up the Output
With the POWER switch on (
accurately preset using the VOLTAGE and CURRENT controls; the left-hand meter shows the set
voltage and the right-hand meter shows the set maximum current.
When the
the actual voltage and the right-hand meter the actual load current.
Constant Voltage
The output voltage is adjusted using the coarse and fine VOLTAGE controls; the CURRENT
control sets the maximum current that can be supplied.
-
-
-
WARNING! THIS INSTRUMENT MUST BE EARTHED.
is connected to the chassis and safety earth ground.
l
) and the
output switch is switched on, the ON lamp lights; the left-hand meter now shows
MAINS LIVE
MAINS NEUTRAL
EARTH
output off the output voltage and current limit can be
Installation
Safety Earth Symbol
Connections
Operation
7
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