Metrohm 757 VA Computrace - Manual (Page 18)

3 Installation
757 VA Computrace – Hardware
14
3.2 Installation of the 757 VA Computrace Stand
If the 757 VA Computrace Stand is connected to the power supply,
the instrument may not be opened or parts removed as there is a
danger of contact with live components. Before you open the 757 VA
Computrace Stand to change components or for maintenance or
repair work, always switch on the instrument by setting the mains
switch 12 to the ON position and then disconnect the mains cable
from the mains connection plug 13 of the 757 VA Computrace Stand !
3.2.1 Mains cable and mains connection
The instrument is supplied with one of three mains cables:
• 6.2122.020 with plug SEV 12 (Switzerland, …)
• 6.2122.040 with plug CEE(7), VII (Germany, …)
• 6.2133.070 with plug NEMA 5-15 (USA, …)
which are three-cored and fitted with a plug with an earthing pin. If a different plug
has to be fitted, the yellow/green lead (IEC standard) must be connected to protec-
tive earth (protection class 1).
Any break in the earthing inside or outside the instrument can make it
a hazard!
Plug the mains cable into mains connection plug 13 of the 757 VA Computrace
Stand (see Fig. 2).
3.2.2 Switching the instrument on/off
The 757 VA Computrace Stand is switched on and off using mains switch 12. When
the instrument is switched on, the pilot lamp 5 lights up.