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2 mains connection, 1 mains voltage and fuses, 2 mains cable – Metrohm 771 IC Compact Interface User Manual

Page 14: 3 switching the instrument on/off

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2 Installation

771 IC Compact Interface

8

2.2 Mains

connection

2.2.1

Mains voltage and fuses

The 771 IC Compact Interface has a power supply which automatically

adjusts itself to the existing mains voltage (100

240 V) and frequency

(50

60 Hz). It is equipped with an electronic overload protection de-

vice and also has two fuses; however, these should only be exchanged

by Metrohm service technicians.

2.2.2 Mains

cable

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 the protective 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 33 at the 771 IC Com-

pact Interface (see

Fig. 2

).

2.2.3

Switching the instrument on/off

the 771 IC Compact Interface is switched on and off using mains switch

22 (see

Fig. 2

). When the instrument is switched on the mains pilot lamp

11 lights up.