Hameg Instruments HM8040-3 Manuel page 27

The current limits can be adjusted
using the rotary controls CURRENT
between 0 – 500 mA. In the CCW position
of these controls 0 A the current will be
STOP
indeed zero, so the output capacitances will
be discharged slowly to 0 Volt.
In the "current limit" mode the appropriate
LED (I ) will light in the CCW position
max
and as explained the output voltage will
slowly decrease to zero. In the "electronic
fuse" mode all outputs will be disabled
immediately after pressing OUTPUT
of the CURRENT controls is set CCW.
Displays
7segment 3 digit displays of either voltage or
current. Each display associates with the
terminals underneath. The displays show
continuously the voltages resp. currents of
the two 20 V outputs, also while these are
switched off. This allows presetting the
output levels prior to activating them which
we do recommend. Selection of voltage or
current is done using the pushbuttons V/mA/
Fuse . The voltages are displayed with
a resolution of 0.1 V, the currents with 1 mA.
Output
Pushbutton for turning all outputs ON/OFF.
The displays remain unaffected always on.
Activation of the outputs is indicated by the
LED "ON".
0 .. 20 V
Outputs 0 .. 20 V. Safety terminals for 4 mm
safety plugs. The outputs can withstand
shorts of unlimited duration.
Voltage
Knobs for output voltage adjustment
Current
Knobs for maximum output current adjust-
ment, pertinent only for the 20 V outputs. The
range is 0 .. 500 mA.
If the control is fully CCW the outputs will be
disabled immediately if the mode "electronic
fuse" was selected. In "current limit" mode
the LED I will light up, and the voltage will
max
decrease slowly to 0 Volt.
5 V/1 A
5 V output with safety terminals for 4 mm
C o n t r o l s
safety plugs. Short-circuit proof. The voltage
may be changed from 4.5 V to 5.5 V using a
screwdriver.
Overtemperature protection!
If the internal temperature exceeds
75 .. 80 degrees C the outputs and the
displays will be switched off which is
indicated by 3 blinking dashes showing in the
STOP
left and right displays. As soon as the displays
light up and show the values set again the
instrument is ready for operation. In order
if any
to turn the outputs back on the pushbutton
OUTPUT
a n d d i s p l a y s
has to be depressed.
Subject to change without notice
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