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Important Notes
R&S
®
NGP800
14User Manual 5601.5610.02 ─ 04
allowed limit, overtemperature protection is triggered and the affected outputs are
switched off automatically.
Air circulation
Do not obstruct the ventilation holes!
3.3 Measurement Categories
This instrument is designed for supplying power-on circuits that are only indirectly con-
nected to the low voltage mains or not connected at all. The instrument is not intended
for measurements within the measurement categories II, III or IV; the maximum poten-
tial against earth generated by the user must not exceed 250 V peak in this application.
The following information refers solely to user safety. Other aspects, such as the maxi-
mum voltage, are described in the technical data and must also be observed.
The measurement categories refer to transients that are superimposed on the mains
voltage. Transients are short, very fast (steep) current and voltage variations which
may occur periodically and non-periodically. The level of potential transients increases
as the distance to the source of the low voltage installation decreases.
●
Measurement CAT IV: Measurements at the source of the low voltage installations
(e.g. meters)
●
Measurement CAT III: Measurements in building installations (e.g. power distribu-
tion installations, power switches, firmly installed sockets, firmly installed engines
etc.)
●
Measurement CAT II: Measurements on circuits electronically directly connected to
the mains (e.g. household appliances, power tools, etc.)
●
0 (instruments without measured measurement category): Other circuits that are
not connected directly to the mains
3.4 Mains Voltage
The instrument accepts worldwide mains voltage from 100 VAC to 240 VAC, 50 Hz / 60
Hz. No voltage selector switch is required. The instrument is protected by internal
fuses which is not user accessible. If the instrument is not powering on, this may indi-
cate an open fuse, the instrument must be sent for servicing. The instrument provides
rocker switch at rear panel, which disconnects the AC input. A standby switch at the
front panel toggles the instrument operation between normal mode and low consump-
tion power down mode.
Mains Voltage
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