Velp Scientifica
– UDK139 Operating Manual
10004762/B5
14
IMPORTANT
Place the carboys for the H
2
O and NaOH solutions on the floor and not at the
same level as the unit on the bench in order to avoid air locks in the suction
tubes.
The sodium hydroxide tubes must be kept full or, alternatively, the tubes can be
emptied and washed at the end of the work cycle. This precaution will avoid the
formation of crystals when the solution comes into contact with air which may
block the tube and prevent the instrument from working correctly.
If the level sensors and full sensors are not plugged-in the instrument will
operate normally but the reserve and full indicators will not be functional.
3.2.
Connection to the electric power supply
Before connecting the instrument to the power supply, make sure that the mains
switch is turned off and that the values on the labels correspond to those of the
power supply. Make sure the electrical network is earthed. Connect the instrument to
the power supply using the cable and plug supplied.
The instrument requires a 220-240V power supply and a frequency of 50 or 60 Hz.
The instrument is delivered already programmed for 230V/50Hz. If the power supply
is 230V/60Hz, the correct values must be selected in the menu
Set up/Frequency
menu
(see chapter 4.5).
NOTE:
the mains switch can be used to disconnect the instrument from the power
supply when not in use in order to reduce energy consumption.
NOTE:
When the service door is opened the power supply cuts-off automatically.
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