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Installation
Mains Operating Voltage
Fuse
Before making connections to the AC line source ensure that the operating voltage of the instrument
is correctly set. The operating voltage is indicated by the orientation of the fuseholder. When the
230V marking is upwards the unit is set for operation over the range 198V to 264V. When the 115V
marking is upwards the unit is set for operation over the range 99V to 132V. To change the operating
voltage range, remove the AC line plug, pull out the fuse holder, replace the fuse with one of the
appropriate rating (see below) and rotate the fuse holder before pushing it firmly back into place.
The correct time-lag fuse must be fitted for the selected operating voltage.
For 230V operation use 125mA 250V time-lag
For 115V operation use 250mA 250V time-lag.
Make sure that only fuses with the required rated current and of the specified type are used for
replacement. The use of makeshift fuses and the short-circuiting of fuse holders are prohibited.
Mains Lead
When a three core mains lead with bare ends is provided this should be connected as follows:
BROWN
-
MAINS LIVE
BLUE
-
MAINS NEUTRAL
GREEN/YELLOW
-
EARTH
WARNING 1 - THIS INSTRUMENT MUST BE EARTHED
Any interruption of the protective conductor inside or outside the instrument will make the instrument
dangerous. Intentional interruption is prohibited.
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