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2.1.3. Connection of a Mains Supply
Before connecting a mains supply, the following checks and adjustments should be
carried out to ensure the safe operation of the apparatus.
Mains Voltage Setting
The 2032 can be connected to a 100 to 127 V or 200 to 240 V ± 10% AC single phase
mains supply operating at 50 to 60Hz, ± 5%. Prior to connection, the setting of the
MAINS VOLTAGE SELECTOR should be checked. Should it be incorrectly set, it may
be turned to its correct setting by using a small coin or a large screwdriver.
Mains Fuse Rating
Ensure the the correct fuse is fitted. It should be as follows:
100-127V: 4A fast blow, BrOei&Kjmr part number VF 0058
200-240 V: 2A fast blow, BrOel & Kjmr part number VF 0057
Make sure that only fuses with the required rated current and of the specified type are
used. The use of mended fuses and the short circuiting of the fuse holder must be
avoided.
Mains Socket Connections
Once the mains voltage setting and fuse have been checked, the mains supply may be
connected to the MAINS INPUT socket of the apparatus using the power cable
BrOel & Kjmr part number AN 0020 provided. The 2032 has a high standard of safety
insulation in accordance with Safety Class II of IEC 348 and therefore need not be
connected to the protective earth contact of a mains supply outlet.
2.2. GROUNDING CONSIDERATIONS
10
Indiscriminate grounding of instruments can introduce ground loop interference. To
prevent this it is necessary to ensure that the signal ground line of the 2032 and of
other instruments with which it is used, are grounded at one point only in the measure-
ment system. To do this without prejudicing the operating safety of the instruments,
proceed as follows:
1.
Connect the signal ground lines of all instruments together. This is done automati-
cally through the screens of the input and output cables used to interconnect the
instruments.
2.
Where the same instruments are interconnected by more than one signal cable or
combination of signal and remote control cables each containing a signal ground
connection, keep the cables short and close together or disconnect the signal
ground line of all but one of them.
3.
Where non IEC 348 Safety Class I or II instruments are employed, disregard item 4
(following) and check that the signal ground line and chassis of these instruments
are connected to mains ground, either via their mains connector or via one of their
ground terminals. In addition keep their power cables and ground lines short and
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