2
Note:
All ourput circuits are protected
against (current) overload.
If the power supply fails to come on, or if it
shuts down duringc operation because of
(current) overload, check the fuses on the
rear of the supply.
Replace a faulty fuse only with a similarly
rated fuse.
Technical specifications:
Output:
0 to -50 V DC, max. 50 mA
0 to +500 V DC, max. 50 mA
2 - 7 V AC, max. 3 A.
Input:
230 V AC (mains supply),
50/60 Hz.
Ripple:
Less than 0,1 %.
Regulation: Less than 1 % variatio, 1 digit,
in output for a combined
variation in line and load of up
to 10%.
Fuses:
3 A automatic thermal cut-out
on the AC unit.
2 pcs. 500 mA T (no. 4090.33)
for the apparatus.
Dimensions: 297 x 118 x 225 mm.
Weight:
4,2 kg
Operation:
1. The apparatus is mains operated. Plug the
mains cord into the apparatus and connect it to
the mains net (see label on rear of the unit).
2. Connect the appropriate output terminals of the
power supply to the circuit. All 3 ranges - -50 V
DC, +500 V DC and the chosen AC voltage -
may be used simultaneously.
3. Turn all the adjust buttons fully
counterclockwise.
4. Switch the apparatus on. The On/Off button will
light to show that the power is on.
5. The 2 digital displays offers you the possibility
of simultaneous readings of voltage and
current. Voltage and current may be read-out
for the -50 V range respectively the +500 V
range.
Voltage and current for the -50 V range may be
displayed when the the LED marked "-50 V" is
lit. The LED is placed above the selector to the
right side of the two displays.
Voltage and current for the +500 V range is
displayed in a similar way.
6. Adjust to the desired voltage by means of the
adjust buttons marked "50 V Adjust"respectively
"500 Volt Adjust". Use the selector to the right
of the 2 displays to set the displays to read
voltage and current for one of the 2 ranges
selectable - either -50 volt or +500 volt.
7. The following procedure is recommended when
switching off the apparatus:
Turn the voltage adjust buttons fully
counterclockwise.
Disconnect the circuit - simply unplug all test
leads.
Switch the apparatus off.
The above mentioned procedure is
recommended for the purpose of avoiding
damage to any equipment connected to the
apparatus. The reason why is that the power
supply’s regulation circuit will be disconnected
once the mains supply is cut off.
Frederiksen
Viaduktvej 35 - DK-6870 Ølgod - Tlf 75 244966 - Fax. 75 246282
e-mail: [email protected] – www.sflab.dk
