HPS13030 - Measuring equipment VOLTCRAFT - Free user manual and instructions

USER MANUAL HPS13030 VOLTCRAFT

Dear customer, Thank you for purchasing this product. This product complies with the statutory national and European requirements. To maintain this status and to ensure safe operation, you as the user must observe these operating instructions! These operating instructions are part of this product. They contain important notes on commissioning and handling. Also consider this if you pass on the product to any third party. Therefore, retain these operating instructions for reference! If there are any technical questions, please contact: www.conrad.com/contact

2. Explanation of symbols

The symbol with the lightning in the triangle is used if there is a risk to your health, e.g. due to an electric shock. The symbol with the exclamation mark in the triangle is used to indicate important information in these operating instructions. Always read this information carefully. The arrow symbol indicates special information and advice on operation. Only to be used in dry indoor areas. This product has been CE-tested and meets the required European guidelines. Grounding wire connection; this screw may not be loosened.27

The laboratory power unit serves as a potential-free DC voltage source to operate low-voltage consumers. The adjust- able output can be tapped with up to 5 A at the front and up to the full nominal current at the back. The front output is limited to 5 A and protected against overload. When switching the outputs of several power supplies in series, voltages of >75 V/DC, which are dangerous to touch, may be generated. This is why insulated lines/measuring cables must be used for safety reasons for voltages above this. Connection on the front is performed with 4 mm safety sockets, on the back with high-current socket screw connectors. The outputs (front and back) are connected to each other. The connection cables used must be large enough. Where the conductor section is too small, overheating andremayresult. The output data of the laboratory measuring devices is as follows: Type Output voltage Output current

Currentandvoltagecanbesetcontinuallythroughdigitalrotarycontrolsusingcoarseandnesettingsinorderto allow fast and precise value settings. The values are displayed on the structured LC display. A power limit for constant power operation can be pre-set without a shorting bar. The power unit can be remote-controlled An external voltage (0 - 5 V/DC) or external potentiometer (5 kOhm) can be used to set the output voltage and output current. The DC output is turned on and off via the a switching contact. Model HPS-11560 also has a remote sensor function (SENSE). The voltage drop in case of high load currents can be compensated for this way. The output voltage at the consumer remains absolutely stable and independent from the load. Threefreelyprogrammablememoryslotscanbeassignedtodifferentxedvoltagesandcurrentlimitations.The selection switch is located at the back of the device. The device is overload- and short-circuit-proof and contains a safety temperature cut-off. The laboratory power unit is designed in compliance with protection class 1. It is only approved for connection to shockproof sockets with protective grounding and an alternating current of 230V/AC commonly used in households. Themainssocketmustbelocatedclosetothedeviceandeasilyaccessible,oranemergencystopxturemustbe available. Operation under adverse environmental conditions is not permitted. Unfavourable ambient conditions are: - moisture or high humidity - dust and combustible gases, vapours or solvents - thunderstormsorsimilarconditionssuchasstrongelectrostaticeldsetc. It is intended for indoor use only. Do not use it outdoors. Contact with moisture, e.g. in bathrooms, must be avoided under all circumstances.28 For safety and approval purposes, you must not rebuild and/or modify this product. If you use the product for purposes other than those described above, the product may be damaged. In addition, improper use can result in short circuits, res,electricshocksorotherhazards.Readtheinstructionscarefullyandstoretheminasafeplace.Makethisprod- uct available to third parties only together with its operating instructions. All company names and product names are trademarks of their respective owners. All rights reserved.

• Laboratory power unit

• Remote connection socket

• Cable with grounding contact

• Operating instructions 1Up-to-date Operating Instructions Download the latest operating instructions at www.conrad.com/downloads or scan the QR code shown. Follow the instructions on the website.

5. Features and functions

• The laboratory power unit works with highly developed combinational circuit technology and active PFC (power factor correction). This ensures a stable output voltage and a high degree of effectiveness. The DC outputs are isolated and feature a protective isolation against the mains voltage. For the secondary DC connection, there are two coloured safety sockets on the front (max. 5A) and two high-load terminal screw clamps on the back (full nominal current range).

• The structured display shows the voltage and current (V = Volt = unit of electric voltage, A = Ampere = unit of electric current) and the status display in case of device interferences

• Various protective mechanisms, e.g. overload protection, current limitation, overheating protection, etc. are built in for secure and reliable operation.

Read the operating instructions carefully and especially observe the safety information. If you do not follow the safety instructions and information on proper handling in this manual, we assume no liability for any resulting personal injury or damage to property. Such cases will invalidate the warranty/guarantee. a) General information

• The device is not a toy. Keep it out of the reach of children and pets.

• Do not leave packaging material lying around carelessly. This may become dangerous playing material for children.

• Protect the appliance from extreme temperatures, direct sunlight, strong jolts, high humidity, moisture, ammablegases,steamandsolvents.

• Do not place the product under any mechanical stress.

• If it is no longer possible to operate the product safely, take it out of operation and protect it from any accidental use. Safe operation can no longer be guaranteed if the product: - is visibly damaged, - is no longer working properly, - has been stored for extended periods in poor ambient conditions or - has been subjected to any serious transport-related stresses.

• Please handle the product carefully. Jolts, impacts or a fall even from a low height can damage the product.

• On industrial sites, the accident prevention regulations of the association of the industrial workers’ soci- ety for electrical equipment and utilities must be followed. Power units used at schools, training facilities, do-it-yourself and hobby workshops should not be handled unless supervised by trained, responsible personnel.

• Pleasemakesurethatyourhands,yourshoes,yourclothing,theoorandthepowerunitaredry.

• Live components may be exposed if covers are opened or parts are removed unless this can be done by hand.

• Disconnect the device from all voltage sources before opening it.

• Capacitors inside the device may still be charged, even if the device has been disconnected from all voltage sources.

• Do not switch the laboratory power pack unit on immediately after it has been taken from a cold to a warm environment. Under adverse conditions, the resulting condensation could destroy the device. Allow the device to reach room temperature before switching it on.

• The plug-in power unit generates heat during operation; ensure that it is adequately ventilated. Do not cover the ventilation apertures of the device!

• Never expose the device to any direct sunlight. Avoid heat sources in direct proximity. The device might overheat.

• Do not leave power units and connected consumer devices in operation unattended.30

• Donotplaceanycontainerslledwithliquid,e.g.vasesorplants,onornexttothepowerunit.Iftheyfall over,thedevicecanbedestroyedandthereisagreatriskofre.Whenworkingwithpowerunits,wear- ing metallic or conductive jewellery, such as necklaces, bracelets, rings etc., is prohibited.

• The power unit is not designed for attaching to humans or animals.

• Consult an expert when in doubt about the operation, safety or connection of the appliance.

• Maintenance,modicationsandrepairsmustonlybecompletedbyatechnicianoranauthorisedrepair centre.

• If you have questions which remain unanswered by these operating instructions, contact our technical support service or other technical personnel. b) Connected devices

• Also observe the safety and operating instructions of any other devices which are connected to the product.31

7. Operating elements

1 Power switch for putting the device into operation (I=ON / 0=OFF) 2 Voltage display “V” 3 Current display “A” 4 Status display output “C.V.” (constant voltage operation) 5 Status display output “C.C.” (current limiter/constant current operation) 6 Statusdisplay“REARCONTROL”showsactiveremotecontrolorxedvoltageoperation 7 Voltagecontrol(withbuttonfunctionforcoarse/neadjustment) 8 Currentlimitercontrol(withbuttonfunctionforcoarse/neadjustment) 9 Minus pole connection socket (max. 5 A!) 10 Plus pole connection socket (max. 5A!) 11 Plus pole high-load connection (screw clamp with socket function)32 12 Minus pole high-load connection (screw clamp with socket function) 13 Slider for selecting the 4 operating modes “MODE” 14 “SENSE” remote sensor connection (HPS-11560 only) 15 Sliderforselectingthefreelydenablexedvoltageplaces“RECALL” 16 Remove control connection “Remote Control” 17 Temperature-controlled internal fan Do not cover! 18 Grounded low-power connection for mains cable 19 Fuse holder for the mains fuse33

The laboratory power unit is not a charger. To charge batteries, use suitable chargers with a charging cur- rent cut-off. During a longer period of operation under nominal load, the surface of the housing will heat up. Attention! Risk of burns! Therefore, make sure that there is adequate ventilation of the power unit and never operate it partly or fully covered to avoid any damage. When connecting a consumer, ensure that it is not connected when switched on. A switched-on consumer can result in sparks when connecting to the output terminals of the power unit, which in turn can damage the sockets or the connected cables and/or their clamps. If your power unit is not required, switch it off and disconnect it from the mains. The displays remain on for a few seconds after it is switched off to unload the internal capacitators and to store the last parameters that were set. Alwaysensureasufcientconductorcross-sectionfortheDCconnectionlines,sinceoverloadmaycause reintheline. a) Connecting the power cable

1. Connect the supplied grounding mains cable to the low-power device installation socket (18) on the power unit.

2. Connect the power cable to a shockproof mains socket with protective grounding. The maximum length of the

power cable to the outlet must not exceed 2 m. b) Unit Installation Place the laboratory power unit on a stable, level and robust surface. Make sure that ventilation slots in the casing are not covered up. c) General Informations The laboratory power unit is micro-processor-controlled and is operated through two digital controls (incremental encoderswithoutendposition)withsensorfunction.Thisenablesneandcoarsecontrolviaacontrol. After the device switches on, a system check is performed. The test status is displayed on the two displays. The displays are in the following order: Display of the current software state.34 Segment test to determine if the display works with all its in- dividual segments. Then the LED displays “C.V.”, “C.C.” and “REAR CONTROL” are tested. System test of the protective devices starts. The over-voltage protection is tested. The over-load protection is tested. The over-temperature protection is tested. Fan test The fan is shortly tested throughout the speed range. For a short time, the fan speed increases audibly The remote control function for “output out” is tested. After this step, the device switches to the regular operating display mode. The power unit enables operation in 4 modes. These modes are selected by the “MODE” (13) slider on the back. The following modes are possible: Normal Normal operation. Voltage and current are adjusted on the front. Preset Memory slot operationThreexedvoltagescanbestoredinthedeviceanddirectlyselected through this “Preset” function. The memory slot is selected with the “RECALL” (15) slider. The front controls are inactive.35 Remote Ctrl Remote control operation. The power unit can be remote-controlled via an external voltage or external poti. The remote settings can be performed for voltage and current. The front controls are inactive. Set Settings operation. The three preset slots can be programmed freely. Select the memory slot with the “RECALL” (15) slider and make the settings using the controls (7, 8). The separate operating modes are described in more detail in the following. d) Added functions The power supply is auto-zeroed every time you turn it on. In case you need to zero the unit during operation and do not want to restart it, zero it manually.

1. Press and hold the VOLTAGE control knob for approx. 30 s to enter the MENU mode. “CCO” and “no” are dis-

2. Rotate the CURRENT control knob until “CCO” and “YES” are displayed.

e) Normal operation In normal operation, the power unit can be operated through the front controls.

1. Ensure that the “MODE” slider is in the “Normal” position.

2. Remove any connected consumers from output (9 and 10 or 11 and 12).

3. Switch on the power unit at the power switch (1). The display (2 and 3) lights up, and after a

short selftest, the current and voltage displays appear. Set the current limitation before setting any voltages. If the current value is too high, your connection lines can be damaged; if it is too low (<1 A), the output voltage can be limited.36 1Set current limitation Limiting the output current is a protection mechanism to protect the consumer or connection cables. Current limitation can be pre-set at the output without any short circuit. The power unit then supplies the maximum current set.

1. Remove any connected consumers from the power unit.

2. Switch on the power unit at the power switch (1). The display (2 and 3) lights up, and after a short selftest, the

current and voltage displays appear.

3. Set the current limitation at the “CURRENT” control according to your application.

4. Turn the control and a current limitation value appears.

Where no setting is made within 3 seconds, the display switches back to the current display.

5. Turnthecontroltotheleftorrighttosetthecurrentlimitation.Afterswitchingon,thenesettingsarea(0.1A)is

always active. This is indicated by a slightly lighter digit. Press the rotary control slightly from the front. The decimal position (1.0 or 0.1) of the setting range changes each time you press. Turning changes the value. Settingscanbemadecoarsely(wholenumbers)orne(bytenths). Where the desired current value was set, the display switches back to normal display after 3 seconds. If the preset current is reached in normal operation, the power unit switches to current limitation mode and reduces the voltage value. This operation is signalled with the red status display “C.C.” (5). 2Set output voltage The output voltage can be set at the “VOLTAGE” (7)control.Thecoarseandnecontrolisperformedinthesameway as for setting the current limitation. With the large control range, it is possible that the voltage setting takes approx. 1- 2 seconds to switch from a high to a low voltage value. In normal mode the device operates in constant voltage mode. This means that the power unit emits a constant, preset output voltage. This operation is indicated with a green status display “CV” (4). 3Connecting a load When connecting a consumer, make sure that it is connected to the power unit when switched off. The maximum current consumption of the device to be connected must not exceed the capacity indicated in the technicalspecications. For serial connection of the outputs with several power supplies, the resulting voltages can be fatal on contact (> 70 V/DC). As of this voltage, you may only use insulated accessories. Avoid the use of non-insulated metallic cables and contacts. Alltheseexposedareasmustbecoveredwithsuitable,ame-resistantinsulationmaterialsorbyother measures and be protected from direct contact and short circuits. Ensureasufcientcablediameterfortheintendedcurrent.37 The power unit has two outputs. These outputs always have the same output voltage. The difference, however, is in the current carrying capacity. At the front sockets (9 and 10), only a current of max. 5 A can be tapped. An automated current limitation is integrated. The screw sockets on the back are indicated for full nominal current. From an output current of 20 A, the screw clamp function of the rear sockets is recommended to avoid overheating of the plug sockets.

1. Remove any connected consumers from the output.

2. Switch on the power unit at the power switch (1). The operating display (2/3) lights up and the current and voltage

display appears on the display.

3. Settheparametersaccordingtoyourspecicationsasdescribedinthechapter“Start-Up”.

4. Check once more that the correct output voltage is set.

5. Connect the plus pole (+) of the consumer with the red socket “+” and the minus pole (-) of the consumer with the

black socket “-” of the respective output (front = “AUX. OUTPUT”, rear = “MAIN OUTPUT”).

6. Now you can switch on the connected consumer.

The current consumption of the connected consumer is displayed in Ampere (A) in the display (3). f) Memory slot operation “Preset” and “Set” Threexedvoltages,includingcurrentsettings,canbestoredinthedevicewiththe“Set”functionanddirectlyse- lected through the “Preset” function. Ex works, all three memory slots (P1, P2, P3) are preset. They are assigned as follows: Memory Type P1 P2 P3 Voltage Current Voltage Current Voltage Current HPS-11530 5 V Maximum 13.8 V Maximum 15 V Maximum HPS-11560 15 V HPS-13015 25 V HPS-13030 25 V HPS-16010 55 V38 Make sure that no consumers are connected.

1. Activate the “Preset” function through the “MODE” (13) slider on the rear. Put the

switch in the “Preset” position. The front LED display “REAR CONTROL” (6) lights up. The front rotary controls are now inactive.

2. Select the respective memory slot “P1, P2 or P3” on the rear slider. The re-

spective output voltage is indicated on the display (2).

3. Now you can connect and switch on the consumer.

Fordeactivatingthexedvoltagefunction,slidethe“MODE”(13) slider back to the “Normal” position. The LED display “REAR CONTROL” (6) goes out. The device switches back to normal power unit operation (always remove DC consumers before!) 1Assigning memory slots with “Set” Allthreememoryslotscanbeassigneduser-specicvaluesforoutputvoltageandcurrentlimitation. Make sure that no consumers are connected. For this purpose, proceed as follows:

1. Activate the “Set” function through the “MODE” (13) slider on the rear. Put

the switch in the “Set” position. The front LED display “REAR CONTROL” (6) lights up.

2. Select the respective memory slot “P1, P2 or P3” on the rear “RECALL” (15)

slider. The respective values for current and voltage are indicated on the dis- play (2/3). The front rotary controls (7 and 8) can be used to set the desired output voltage and current limitation. If required, repeat these steps with the other memory slots.

3. When all parameters are set, slide the “MODE” (13)sliderbacktothe“Preset”positionforxedvoltageoperation

or to the “Normal” position for standard operation. g) Resetting output presets (P1/P2/P3) to factory default values The power supply allows for presetting three voltage values (including current settings) by means of three memory slots: P1, P2, and P3. In case you want to reset the memory slots to the factory default values during operation, do the following.

1. Press and hold the VOLTAGE control knob for approx. 30 s to enter the MENU mode. “CCO” and “no” are dis-

2. Rotate the VOLTAGE control knob until “rPr” and “no” are displayed.

3. Rotate the CURRENT control knob until “rPr” and “YES” are displayed.

4. Press the CURRENT control knob once to reset the preset values. “YES” lights up when the values have been

5. Press the VOLTAGE control knob to exit the MENU mode.

h) Remote control operation “Remote Ctrl” Through the built-in “Remote control” connection (16), the voltage and current can be set through an external volt- age source or an external adjustable resistance (short “poti”). The remote control is connected on the rear “Remote Control” built-in plug (16). There is a remote socket included for connection. In remote-controlled operation, the current control path must also be connected, since the output otherwise switches to the current limitation mode “C.C.” and limits the output voltage. 1Preparation of the remote control connection

1. Turn the lateral screw of the supplied socket and remove the front, black contact socket turning it slightly.

through the metal sleeve from the rear. Carefully solder these cables to the soldering lugs no. 1, 2, 3, 4 and 5 of the black contact socket. Ensure that no short circuits are created. The numbers of the soldering lugs are indicated on the black insulator.

3. Mark the loose ends of the cables with the corresponding contact numbers (1-5) to avoid confusion.

4. Insert the black contact jack in the reverse order into the metal sleeve and screw them tight.40

The contacts are assigned as follows: Contact 1 Internal control voltage + 5 V/DC (<50 mA) Contact 2 Voltage setting Contact 3 Current setting Contact 4 Reference ground (“Ground”) Contact 5 Output on/off Contact 6 - 8 Not assignedt 2Control through external voltage source The power unit can be remote-controlled with an external voltage source from 0 to 5V/DC throughout the range for voltage and current. Proceed as follows for connection:

1. Connect the connecting cables of the remote sockets as illustrated:

Voltage setting “U”: Voltage setting “I”: Connection 2 to the plus pole (+) of the external control voltage Connection 3 to the plus pole (+) of the external control voltage Connection 4 to the minus pole (-) of the external control voltage Connection 4 to the minus pole (-) of the external control voltage The voltage on the remote control connection must not exceed 5 V. The connections may not be shorted.

2. Switch off the power unit and then connect the remote socket to the rear remote connection. Screw on the external

3. Turn the voltage of the external voltage source to 0 V.

4. Switch on the power unit.

5. Put the MODE switch on the rear into the “Remote Ctrl” position. The “REAR CONTROL” dis-

6. The desired output value can now be set through the external voltage source. Control the com-

plete adjustment area for correct function. The output voltage can be monitored in the display. Short-circuit the rear main output (11, 12)withasufcientlythickcableforcheckingthecurrentcontrol(at least 8 mm

). Control the complete adjustment area for correct function.

7. If this remote control function is no longer required, put the MODE switch to the “Normal” position.41

3Control through a controllable resistance (poti) The power unit can be remote-controlled with an external poti (5 Kohm) throughout the range for voltage and current. Proceed as follows for connection:

1. Connect the connecting cables of the remote sockets as illustrated.

Voltage setting “U”: Voltage setting “I”: Connection 1 at one end of the resistance Connection 1 at one end of the resistance Connection 2 at the centre sliding contact of the resistance Connection 3 at the centre sliding contact of the resistance Connection 4 at the second end of the resistance Connection 4 at the second end of the resistance Connections 1 and 4 must not be short-circuited.

2. Switch off the power unit and then connect the remote socket to the rear remote connection. Screw on the external

4. Put the MODE switch on the rear into the “Remote Ctrl” position. The “REAR CONTROL” dis-

play is lit. The desired output values can now be set through the external poti.

5. Control the complete adjustment area for correct function. The output voltage can be monitored

in the display. Short-circuit the rear main output (11, 12)withasufcientlythickcableforcheckingthecurrentcontrol(at least 8 mm

). Control the complete adjustment area for correct function.

6. If this remote control function is no longer required, put the MODE switch to the “Normal” position.

4Remote-control output (on/off) The DC output can be turned on and off via the a switching contact. Proceed as follows for connection:

1. Connect the connecting cables of the remote sockets as illustrated.

2. Contact connections 4 and 5 with an isolated switching contact.

When the output is turned off, the status displays “C.V.” (4) and “C.C.” (5)willash.Thedisplaywillthenshowthe current settings of the output voltage (2) and the output current (3). 3. When the output is turned off, you can set the output values with the controls for voltage (7) and current limiting (8).42 No voltage must be applied to contacts 4 and 5.

4. Switch off the power unit and then connect the remote socket to the rear remote connection. Screw on the external

6. Put the MODE switch on the rear into the “Remote Ctrl” position. The “REAR CONTROL” dis-

play is lit. If the switching contact is open, the DC output is active; if it is closed, the DC output is switched off. Check the switching function for correct function. When the DC output is switched off, “O P OFF” is displayed.

7. If this remote control function is no longer required, put the MODE switch to the “Normal” position.

9. “SENSE” FUNCTION (HPS-11560 ONLY)

The HPS-11560 has an automatic voltage control for the rear high-current output. For this, two separate measuring cables are connected parallel to the connecting cables. The potential drop which occurs on the connecting cables is measured on these two measuring cables. The laboratory power unit automatically compensates for this voltage drop so that the actually set voltage is supplied to the consumer. Proceed as follows for connection: Alwaysconnectthesupplycablesfromthepowerunittotheconsumerrst.Payattentiontocorrectpolarity. Press the clamp release on the rear SENSE connection inwards with a small screwdriver and insert the cables into theterminalopenings.Checkthattheyarepluggedrmly. Now connect the two “SENSE” cables to the consumer observing the correct polarity. The conductor cross-section for the “SENSE” cables must be at least 0.34 mm

Alwaysslackentheconnectioninthereverseorder(rstofall“SENSE”cablesandthentheconnectingcables).43 Make sure that you contact the SENSE cables as close as possible to the connecting point of the con- sumer. Observe correct polarity. Never short-circuit the “SENSE” cables.

10. Protective device

The power unit has several integrated automatic protective devices that protect the power unit from damage. The activated protective devices are displayed with letter codes and the DC output is switched off for safety reasons at the same time. When a protective devices is active, the consumer must be switched off and disconnected from the power unit immediately. To reactivate the output, switch off the power unit. Wait until all displays have gone out. Switch on the power unit again. The power unit should work normally again. Where this is not the case, please contact our customer service. The following displays are possible: 1Over-voltage protection A higher external voltage than provided by the power unit was determined at the DC output. The output is switched off. The current levels for switching off are listed in the technical data. The current levels for switching off are listed in the technical data. Over-heating protection The integrated temperature sensor determined that the system temperature is too highThe integrated temperature sensor determined that the system temperature is too high. To prevent overheating, the output is switched off. Turn off the power unit and let it cool down for at least 30 minutes. After switching it on, check if the fan or ventilation apertures are blocked. During the startup self-test stage, the fan must start up audibly. Where this is not the case, please contact our customer service. To prevent overheating, the output is switched off. Overload protection In case of overload at the DC output, the power limitation is usually switched on. If this is not the case, the second protective function becomes active. Switch off the power unit at once when this warning message appears and check the connection data of the consumer. Remove the consumer from the power unit’s DC output. Switch on the power unit again and check its function. If the error message re- mains on, please contact our customer service.44

By purchasing the laboratory power unit, you have acquired a product that is reliable and operationally safe. Neverthe- less, problems or errors may occur. For this reason we want to describe how to troubleshoot potential malfunctions: Always follow the safety instructions! Error Possible cause The power unit cannot be switched on. Does the operating display light up on the power unit (2)? Check the mains voltage (you may also want to check the mains fuse in the device or the line circuit breaker). Connected consumer devices do not work. Is the voltage set correctly? Is the polarity correct? Check the technical data of the consumers. The “REAR CONTROL” display is lit. The device can not be operated via the rotary controls. Remote control operation is active. Put the rear “MODE” slider into the “Normal” position. The “O P PFF” display is lit. The DC output was switched off through the remote control output (16). Release the connection between contacts 4 and 5. The output is switched on again. The output current is limited to 5 A, although the current settings are higher. The front connection is limited to no more than 5 A. For higher currents, connect the consumer to the rear main output. The “CC” LED is lit. Constant current operation The preset current was exceeded. Check power consumption on your consumer and increase the current limitation on your power unit, if applicable. The “C.V.” display is lit. Constant current operation The power unit works normally. The output provides the constant voltage set. OVP Over-voltage protection See chapter “Protective Devices” OtP Over-temperature protection See chapter “Protective devices” OLP Overload-protection See chapter “Protective devices”45 Regularly check the technical safety of the device e.g. for damaged housing etc. Do Fuses are replacement parts and not covered by the warranty/guarantee. Repairs other than those described above may only be carried out by an authorised specialist. If you have any questions concerning the handling of the device, please do no hesitate to contact our Technical Sup- port.

12. Care and cleaning

Do not use any aggressive cleaning agents, rubbing alcohol or other chemical solutions as they can cause damage to the housing and malfunctioning.

• Apart from an occasional cleaning or exchanging the fuse, this laboratory power unit is maintenancefree.

• Disconnect the product from the mains before each cleaning.

• Cleantheproductwithadry,bre-freecloth. 1Exchanging the fuse If it is no longer possible to switch on the laboratory power unit, the rear mains fuse (19) is probably defective. Proceed as follows to replace the mains fuse:

1. Switch off the power unit and remove all the connection cables

and the mains plug from the device.

2. Lever the rear fuse holder (19) with a suitable screwdriver from

of the same type and rated current. The fuse value is listed in the chapter on “Technical Data”.

4. Press the fuse insert into the fuse holder.46

This symbol must appear on any electrical and electronic equipment placed on the EU market. This symbol indicates that this device should not be disposed of as unsorted municipal waste at the end of its service life. Owners of WEEE shall dispose of it separately from unsorted municipal waste. Spent batteries and accumulators, which are not enclosed by the WEEE, as well as lamps that can be removed from the WEEE in a non-destructive manner, must be removed by end users from the WEEE in a non-destructive manner before it is handed over to a collection point. Distributors of electrical and electronic equipment are legally obliged to provide free takeback of waste. Conrad pro- vides the following return options free of charge (more details on our website):

• at the Conrad collection points

• at the collection points of public waste management authorities or the collection points set up by manufacturers or distributors within the meaning of the ElektroG End users are responsible for deleting personal data from the WEEE to be disposed of. It should be noted that differ- ent obligations about the return or recycling of WEEE may apply in countries outside of Germany.

Output power 450 W 900 W 450 W 900 W 600 W Output voltage 1 - 15 V/DC 1 - 15 V/DC 1 - 30 V/DC 1 - 30 V/DC 1 - 60 V/DC Output current 0 - 30 A 0 - 60 A 0 - 15 A 0 - 30 A 0 - 10 A Residual ripple at Nominal load (eff) 5 mV/50 mA 5 mV/100 mA 5 mV/20 mA 5 mV/40 mA 5 mV/10 mA Voltage control response at 100% Load change 50 mV Voltage control response at Mains uctuation (170 - 264 V/AC) 20 mV Current control re- sponse at 10 - 90% Load change 150 mA 200 mA 100 mA 150 mA 100 mA47