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Les langues disponibles
PE 1515
9
h
III. OPERATION
(Fig. 1)
A. MAINS VOLTAGE
The apparatus is switched on and off with the switch at the bottom right of the front panel (SK2).
Caution: If a switched-on apparatus is opened,
pay attention to the fact that part of circuit has
a mains voltage with respect to earth.
These parts are marked red.
B. OUTPUT
VOLTAGE
The output voltage is indicated by the combined volt/ammeter after one of the knobs (12.5 V or
30 V) of switch "METER
RANGE"
has been set to the correct voltage range.
The output voltage is adjusted with the knob "U".
Over-voltage
protection (crowbar)
The circuit connected to the output terminals can be protected against too high voltages with the
"OVERVOLTAGE
PROTECTION",
which is adjustable between 3.5 and 35 V by means
of a
potentiometer with screwdriver-adjustment at the rear.
If the voltage at the output terminals exceeds the adjusted value, the "DC FAILURE"
lamp lights
up and the output voltage decreases.
The "U" lamp (voltage stabilization) or "I" lamp (current
stabilization) is extinguished.
As soon as the cause of the over-voltage has been eliminated,
the output voltage may be reset by
switching the stabilizer on and off.
€. OUTPUT
CURRENT
The output current is also indicated by the combined
volt/ammeter after one of the knobs (12.5 A)
of switch "METER
RANGE"
has been set to the correct current range.
The output current is adjusted with the knob "I".
If necessary,
the output terminals can be short-circuited when adjusting the output current.
However,
it is advisable to do this at a low output voltage.
Note:
During transport,
the knobs of switch "METER
RANGE"
to "out" in order to damp the
movement
of the moving coil in the meter as much as possible.
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