Preparing for Use
R&S
®
HMP Series
17
Getting Started 1178.6791.02 ─ 02
The instrument must only be connected to an outlet that has a ground contact,
according to the specifications for safety class EN
61010.
Replacing the Fuses
The instrument has main power fuses, which are located on the rear panel of the
unit. Depending on the line voltage setting, the fuses of the correct type must be
installed.
Risk of electric shock
The fuses are part of the main power supply. Therefore, handling the fuses
while power is on can lead to electric shock. Before opening the fuse
holder, make sure that the instrument is switched off and disconnected from
all power sources.
Always use fuses supplied by Rohde
&
Schwarz as spare parts, or fuses of
the same type and rating.
The nominal current of the fuse depends on the line voltage, and the R&S
HMP
model:
Table 4-1: Fuse types
Line Voltage
R&S
HMP2020 / R&S
HMP2030
R&S
HMP4030 / R&S
HMP4040
115
V
2 x T6.3H/250
V
2 x T10H/250
V
230
V
2 x T3.15H/250
V
2 x T5H/250
V
To replace the fuses
The instrument has an externally accessible fuse holder combined with the IEC
socket at the rear panel.
1. Select the fuses according to the voltage of the AC line, see
.
2. Press the plastic locks on the sides of the fuse holder inwards using a screw-
driver (with a blade width of approximately 2
mm).
The insertion points are marked by two slanted guides on the casing.
When unlocking the mechanism, the fuse holder is pushed outwards by com-
pression springs.
3. Remove the fuse holder.
Putting into Operation
