Safety Instructions; Before Measuring - elc AL 781NX Bedienungsanweisungen

6.1 SAFETY INSTRUCTIONS

None intervention is authorized inside the casing.
The instrument must be used according to the instructions of this manual.
The plug of the mains cord being used as the switch off device, the instrument
must be connected to a socket easily accessible, which has an earth connection.
When this instrument has to be powered using a separated autotransformer
to get a voltage reduction, make sure that the common terminal is connected to
the pole earthed of the feeding circuit.
The common mode voltage between Earth and output terminals shall not
exceed 50V rms. As from 30V, a voltage judged dangerous (>60V =) can be reached
between one of the output terminals and earth. In these cases, it is necessary to
use safety cords for the connection to the instrument's outputs. Moreover, the
instruments connected mustn't have conductive parts accessible.
6.1.1 Description of thE instrument's rear panel
A: MAINS RECEPTACLE
B: 2AT FUSE
The fuse (5 x 20mm 2AT) can be replaced by a
fuse of same type and features.
6.2 CONTROLS
6.2.1 Controls description of the front panel
(1) VOLTAGE REGULATION CONTROL. The lighting green Led shows that
the power-supply works in voltage regulation.
(2) VOLTAGE DISPLAY. Allows to read the voltage from 0 to 30V with a 100mV
resolution.
(3) VOLTAGE ADJUSTMENT. Allows the adjustment of a voltage between 0
and 30V.
(4) «ON-OFF» SWITCH. The "O" indicates the position of the stop device.
(5) VOLTAGE FINE ADJUSTMENT. Makes the voltage adjusted by 3 vary of
about 2V.
(6) POSITIVE TERMINAL
(7) NEGATIVE TERMINAL
(8)
(9)
(10) «5A» MODE CONTROL
(11) «1A» MODE CONTROL
(12) CURRENT DISPLAY. Allows to read the current from 0 to 5A with a 10mA
(13) CURRENT REGULATION CONTROL. The lighting red Led shows that the
(14)
A
B

6.3 BEFORE MEASURING

6.3.1 Use at constant voltage
Set the current at the maximum value. Set the voltage at the value required. Connect
the load on the proper terminals.
Check the voltage regulation : lighting green Led.
6.3.2 Use at constant current
Set the voltage at the maximum value. Select the working current, with the short
circuit and the setting. Connect the load on the proper terminals according to the
mode. Check the current regulation : lighting red Led.
- 9 -
CURRENT ADJUSTMENT. Allows to adjust a current between 0 and 5A.
SELECTION OF THE CURRENT RANGE
1A-position : The power-supply can deliver up to 1A
The indicator will read a current from 0 to 1A.
5A-position : The power-supply can deliver up to 5A.
The indicator will read a current from 0 to 5A.
On the switching on, the available range of the power supply is 1A.
resolution.
power-supply works in current regulation.
FUNCTIONAL EARTH TERMINAL. Directly earthed from the frame.
Allows to take the earth as reference for your mounting.
Fig.2