8
To replace the fuse safely, isolate the appliance
from all voltage sources (pull out the mains
plug!) and voltage circuits. After isolating the
appliance, use a suitable screwdriver to prise
out the fuse holder together with the faulty
fuse fitted, remove the faulty fuse and re-
place it by a fuse of the same type.
When inserting the replacement fuse into the
fuse holder, make sure that the arrow mark
corresponds to selecting the correct mains
input voltage.
10. Exercise special care when dealing with
voltages in excess of 25 V alternating current
(AC) or 35 V direct current (DC). Even at
voltages as low as these, it is still possible to
suffer a life-threatening electric shock if
contact is made with conducting parts.
2. Operating Instructions for Oscilloscope
OS-3020 D/OS-3060 D
2.1 Description of controls
Fig. 2, Front view
11. Before each measurement, check your mea-
suring appliance (oscilloscope) and mea-
suring leads (probes, BNC cable) and the
power cord for damage.
12. To avoid any possibility of electric shock,
ensure that you do not come into contact,
even indirectly, with the probe tip(s) and/or
alligator clips in the case of exposed BNC
wiring or the connections being measured
(measuring points).
13. When safe operation is obviously no longer
possible, the appliance must be taken out of
use and secured from being accidentally
switched on.
It can be assumed that safe operation is no
longer possible when:
- there is visible damage to the appliance,
- the appliance is no longer working,
- the appliance has been stored for an ex-
tended period in unsuitable conditions,
- it has been exposed to adverse transport
conditions.
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