Metrohm 748 DH Sample Changer - Manual (Page 7)

2.1 Mains voltage, mains connection
748 DH Sample Changer
5
2 Sample changer start-up
2.1 Mains voltage, mains connection
Check that the voltage set on the instrument corresponds
to your mains voltage. If this is not the case then the mains
voltage must be altered:
1. Remove the mains cable.
2. Carefully open the compartment above the mains cable
with a screwdriver.
3. Remove the voltage selection drum.
4. If necessary change the fuse: remove the parts marked
with " ⇒ " and insert the fuses for the corresponding volt-
age which are given on the rear panel of the instrument.
5. Rotate the voltage selection drum so that the correct
voltage appears at the front (when the compartment is
closed this voltage will appear in the window).
6. Close the compartment again.
Set mains voltage for pump
1. Screw off the cover for the pump voltage setting (fold-
out page, position 15).
2. Adjust the tumbler switch so that your approximate
mains voltage appears:
220...240 V: switch display 230 V
100...120 V: switch display 115 V
3. Change the fuse if necessary.
4. Screw on the cover again so that the marking with the
set voltage is on the outside.
The mains cable supplied with the instrument is a 3-core
cable fitted with a plug with an earthing pin. If a different
plug must be used then the yellow/green lead must be
connected to the protective earth. Any break in the earthing
inside or outside the instrument can turn it into a hazard.
When the instrument is opened or if parts of it are removed
then certain components may be live if the instrument is still
connected to the mains. This means that the mains cable
must always be unplugged when certain adjustments are
made or when parts are replaced.
The cable should only be plugged in and unplugged when
the instrument is switched off.