Hameg Instruments HM 7042-4 Handbuch Seite 24

Survey of all operating controls and displays

ELECTRONIC FUSE
This pushbutton will activate the electronic fuse mode, indicated
by LED [ON].
Current limiting
After turn-on of the power supply it will always start in the
"Current limit" mode.
Using the CURRENT LIMIT
current I can be set for each output separately. Onset of
max
current limiting in one channel will not influence the others.
In order to adjust I the appropriate output has to be short-
max
circuited first, then I can be set, the associated LED
max
•
will light up and indicate the current limit mode.
Electronic fuse (Fuse)
Prior to selection of this mode the current limits have to be set
using the CURRENT LIMIT
output has to be short-circuited first before adjusting the
appropriate CURRENT LIMIT control. After setting I
has to be removed. Then Electronic Fuse
[ON] will light up indicating that the HM 7042-4 is in the Electronic
Fuse mode. In this mode all outputs will be immediately deactivated
if the I of one channel is reached. In order to leave this mode
max

press Electronic Fuse again.
The current limits can be set using the controls
CURRENT LIMIT
is set CCW to 0 A indeed the current will be zero, so the output
capacitances will be discharged slowly to 0 V. In Current
Limit mode the CCW position of a control will cause the
 ‘ •
associated LED
STOP
decrease slowly. In the Electronic Fuse mode the CCW
position of any CURRENT LIMIT control will result in imme-
diate switching off of all channels after depressing OUPUT
“
ALL CHANNELS .
“
OUTPUT ALL CHANNELS
Pushbutton for turning all 3 channels simultaneously ON/OFF,
indicated by the LED [ON]. The voltage displays will remain
unaffected.
Mains switch
24
controls the maximum output
controls. As outlined each
max

is depressed, the LED
0 – 2 A / 0 – 5 A. If a control
to light up, the output voltage will
 ‘
or
the short
Subject to change without notice