These operating instructions are published by Conrad Electronic SE, Klaus-Conrad-Straße 1, D-92240 Hirschau/Germany
(www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic
data processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited.
The operating instructions reflect the current technical specifications at time of print.
We reserve the right to change the technical or physical specifications.
© 2013 by Conrad Electronic SE.
V2_1013_02-JH
b) Setting the output voltage
In order for the correct output voltage to be set, the lab power supply’s output must be operated in a voltage-controlled state.
• Turn the control dial “CURRENT” (9) for output current limit from the left position clockwise until the red LED display “CC” (11)
for output current regulation goes out and the green LED display “CV” (10) for output voltage regulation lights up.
• Check the control dial “FINE” (4) for exact voltage adjustment. It should be at the middle position.
• Then, use the control dial “COARSE” (3) to roughly set the desired output voltage. The currently set voltage can be viewed on
the LED display “V” (2). Turn the dial clockwise to increase, counter-clockwise to decrease voltage.
• Then use the control dial “FINE” (4) to exactly set the output voltage.
If you have to turn the control dial “FINE” (4) until it stops, return it to the middle position and adjust the setting
with the control dial “COARSE” (3) before making final exact adjustments.
c) Setting the current limit
Read the section “d) Connecting units” before undertaking adjustments for the current limit. For an exact current
limit setting, a unit must be connected and turned on, and the lab power supply must also be turned on.
The limited current value can be viewed on the LED display “A” (1) only during use.
First, use the control dials “COARSE” (3) and “FINE” (4) to set the permissible operating voltage of the unit to be
connected (see chapter 6.b).
• With the control dial “CURRENT” (9) for output current limit, approximately set the required amperage.
• Turn the dial clockwise to increase, counter-clockwise to decrease amperage.
When both control dials for voltage adjustment (3 and 4) are all the way to the left, the voltage display shows
“00.0” volts.
If you then turn the control dial “CURRENT” (9) for output current limit all the way to the left, the lab power supply
switches to current-controlled mode and the voltage display shows a minimum value. This is due to the electrical
structure of the lab power supply and is not a sign of malfunction.
d) Connecting units
First, verify that the total output of all units together does not exceed the lab power supply’s maximum capacity.
• Turn off all units when connecting them to the lab power supply. Otherwise, sparks may occur, and the sockets and plugs
may be damaged.
• Turn off the lab power supply.
•
Connect the unit’s plus terminal (+) to the lab power supply’s plus socket (5) and the minus terminal (-) to the power supply’s
minus socket (7). Use cables of appropriate dimensions with 4 mm banana plugs or use standardized lab cables.
•
Ground the units using the lab power supply’s provided ground connection (6).
• Turn on the lab power supply and the unit.
Once voltage is applied to the output sockets and the unit has been turned on, the current values for the current
limit and voltage are shown on the LED displays (1 and 2).
Depending on the lab power supply’s operation mode (current- or voltage-controlled), the LED display “CC” (11)
for output current regulation or “CV” (10) for output voltage regulation lights up.
•
If necessary, you can also readjust the values for the current limit or output voltage for activated output sockets.
• Turn off the unit and the lab power supply before disconnecting a unit.
Caution!
The lab power supply has a protective circuit that limits the current in the even of a short circuit. To prevent the lab
power supply from overheating, always turn it off immediately and disconnect all connected units in the event of
a short circuit. Allow the lab power supply to cool down and make sure that it is well ventilated. The air vents (12)
must be clean and free of dust, do not cover the housing openings.
The lab power supply‘s maximum continuous operating time is 8 hours. After this period, turn off the device and
let it cool down to room temperature.
7. Cleaning and care
a) General care
Always turn off and unplug the lab power supply before cleaning. You can clean the outside of the device with a soft, dry cloth or
brush. Never use any aggressive solvents or chemical solutions as these may cause damage to the housing surface.
b) Changing the fuse
Caution!
First, turn off the lab power supply and disconnect all cables. Then unplug the device.
•
Use a slotted screwdriver to slightly push in the fuse holder (13) on the back and open the bayonet connector by turning it
counter-clockwise a quarter turn. A spring will automatically push out the fuse holder.
• Replace the defective fuse with a new one of the same type and same nominal rating (see “Technical data”).
•
Replace the fuse holder, push it in slightly and use the screwdriver to fasten it in place. Check to see if the lab power supply
works properly.
8. Troubleshooting
The lab power supply does not function, the displays do not light up.
•
Check the power switch.
•
Check whether the mains plug is correctly connected to the mains socket (14) on the back of the device.
•
Check the functionality of the power supply line (outlets, fuses, circuit breakers, etc.).
•
Check whether the correct mains voltage is present.
The connected units do not function.
•
Check the polarity of the connection sockets (5 and 7).
•
Check whether a current limit is activated.
•
Reduce the charge to the lab power supply from the connected units.
•
Check the connected units’ technical data.
9. Disposal
Electronic devices are recyclable waste and must not be disposed of in the household waste.
At the end of its service life, dispose of the product according to the relevant statutory regulations.
You thus fulfil your statutory obligations and contribute to the protection of the environment.
10. Technical data
General
Operating voltage:
230 V/AC, 50 Hz (±10 %)
Frequency:
50 Hz (±2 Hz)
Adjustable output voltage:
0 – 15 V/DC
Adjustable output current:
0 – 3 A
Power consumtion:
max. 100 W
Continuous operation:
max. 8 h
Fuse:
1 A, 250 V (T1AL250V)
Protection class:
I
Cable length:
1.8 m
Operating temperature/humidity:
0 to +40 ºC, <90 % RH
Storage temperature/humidity:
-10 to +70 ºC, <70 % RH
Dimensions (W x H x D)
112 x 165 x 265 mm
Weight:
2.6 kg
Output voltage
Idle state:
≤ 0.01 % + 1 mV
Stability at 10 – 100 % load:
≤ 0.2 % + 2 mV
Ripple (5 Hz – 1 MHz):
≤ 0.5 mVrms / ≤ 20 mVss
Output current
Idle state:
≤ 0.01 % + 2 mA
Stability at 10 – 100 % load:
≤ 0.2 % + 6 mA
Ripple (5 Hz – 1 MHz):
≤ 3 mArms / ≤ 30 mAss
Display accuracy
Voltage:
±1 % + 2 digit
Current:
±2 % + 2 digit
