7 Maintenance and repairs
45
V-850 / V-855 Operation Manual, Version E
7
Maintenance
This chapter gives instructions on all maintenance work to be performed in order to keep the instru-
ment in good working condition. In addition to this, adjustment jobs the operator can carry out by
himself/herself are explained.
!
CAUTION
Risk of minor or moderate burns by electric current.
• Switch off the instrument and disconnect the power cord.
• Do not spill liquids over the device
7 .1
Housing
Immediate maintenance
The housing is made of plastic. Remove any acid drops immediately from the housing with a moist
cloth.
General maintenance
Check the housing for defects (controls, plugs) and clean it regularly with a moist cloth.
NOTICE
Risk of instrument damage by liquids and detergents.
• Do not spill liquids over the instrument or parts of it
• Wipe off any liquids instantly
• For the housing, use ethanol or soapy water as detergent only
7 .2
Functional test
Test the following functions in regular intervals:
• Switch on the instrument. The display shows the basic state of the last distillation. When the
connected instrument is aerated, the current atmospheric pressure is displayed.
• Press RUN. The aeration valve turns on, making an audible sound, the pump starts, the vacuum
valve opens, and the display indicates the RUN mode.
• Press STOP. The aeration valve switches, making an audible sound, the pump stops, the vacuum
valve closes and the display changes to the basic mode.
NOTE
When Aeration Off is configured, the valve only switches when you press the STOP button a second
time.
