Voltcraft VC-8146850
VOLTCRAFT VLP-1405 USB Laboratory Power Supply User Manual
Model: VC-8146850
1. Introducció i presentació del producteview
The VOLTCRAFT VLP-1405 USB is a high-precision, electronically linear regulated laboratory power supply designed for various applications requiring stable and adjustable DC voltage and current. It features three independent outputs, including a dedicated USB test and development port, making it ideal for testing and developing USB-powered devices.
Les característiques clau inclouen:
- Electronically linear regulated output for ripple-free operation.
- Three independent outputs for versatile use.
- Vol. ajustabletage from 0 to 40V and current from 0.01 to 5A.
- Més del voltage Protection (OVP) for enhanced safety.
- Integrated USB test and development port for stressing and testing USB devices.

Figura 1: Davant view of the VOLTCRAFT VLP-1405 USB Laboratory Power Supply, showing the digital displays for voltage and current, control knobs, output terminals, and USB ports.
2. Instruccions de seguretat
Si us plau, llegiu i comprengui totes les instruccions de seguretat abans de fer servir el dispositiu. Si no segueix aquestes instruccions, es poden produir descàrregues elèctriques, incendis o lesions greus.
- Assegureu-vos que la font d'alimentació estigui connectada a una presa de corrent amb connexió a terra.
- No utilitzeu el dispositiu en mullat o damp condicions.
- No obriu la c.asing; no hi ha peces a l'interior que l'usuari pugui reparar. Demaneu el servei tècnic a personal qualificat.
- Always disconnect the power cord before performing any maintenance or moving the unit.
- Assegureu-vos una ventilació adequada al voltant de la unitat per evitar el sobreescalfament.
- No supereu el volum màximtage and current ratings of the device or the connected load.
3. Configuració
Follow these steps to set up your VOLTCRAFT VLP-1405 USB Laboratory Power Supply:
- Desembalatge: Carefully remove the power supply from its packaging. Inspect the unit for any signs of damage during transit. Retain the packaging for future transport or storage.
- Col·locació: Place the unit on a stable, level surface with adequate ventilation. Ensure there is sufficient space around the unit for air circulation, especially at the rear where the cooling fins are located.
- Connexió d'alimentació: Connect the supplied power cord to the AC inlet on the rear panel of the power supply and then to a suitable grounded mains outlet (230V AC, 50Hz).
- Encesa inicial: Before connecting any load, switch on the power supply using the main power switch on the front panel. The digital displays should illuminate.

Figura 2: posterior view of the VOLTCRAFT VLP-1405 USB Laboratory Power Supply, showing the power input, fuse holder, and cooling fins.
4. Instruccions de funcionament
This section details the operation of the VOLTCRAFT VLP-1405 USB, including its various outputs and controls.
4.1. Controls i indicadors del panell frontal
- Interruptor d'alimentació: Main ON/OFF switch for the unit.
- Pantalles digitals: Two large LED displays show the current output voltage (V) i corrent (A).
- VOLT Knob: Ajusta el volum de sortidatage for Output A.
- AMPERE Knob: Adjusts the output current limit for Output A.
- C-LIMIT Indicator: Illuminates when the current limit is reached.
- OVP ADJ Knob: Adjusts the Over Voltage Llindar de protecció.
- SOBRE VOLTAGE Indicator: Illuminates when OVP is active.
- Output A Terminals: Red (positive), Black (negative), Yellow (ground) terminals for the main adjustable output.
- Output B-USB Section: Dedicated section for USB outputs with mode selection and adjustment.

Figura 3: A hand adjusting the controls on the front panel, demonstrating the user interaction with the voltage i botons de corrent.
4.2. Using Output A (0-40V, 0.01-5A)
- Ensure the power supply is turned off before connecting any load.
- Connect your load to the Output A terminals: positive to red, negative to black. The yellow terminal is for ground connection if required.
- Enceneu la font d'alimentació.
- Ajusteu el VOLT botó per ajustar el volum de sortida desitjattage. El voltage will be displayed on the left digital meter.
- Ajusteu el AMPERE knob to set the desired current limit. The current will be displayed on the right digital meter. It is recommended to set the current limit slightly above the expected operating current of your load to prevent accidental overcurrent.
- El OVP ADJ knob allows you to set an overvoltage protection threshold. If the output voltage exceeds this threshold, the power supply will shut down to protect the connected device.

Figura 4: The power supply with red and blue test leads connected to the main output terminals, demonstrating a typical setup for powering a device.
4.3. Using Output B-USB
The Output B-USB section provides two USB ports (USB-B1 and USB-B2) for testing and powering USB devices. It also includes a special function for stressing USB devices.
- USB-B1: Standard USB output (e.g., 5V, 1A).
- USB-B2: Higher current USB output (e.g., 5V, 2.4A).
- Interruptor de MODE: Selects between different operating modes for the USB outputs, including normal operation and stress test modes. Refer to the markings on the panel for specific voltage/current ranges for each mode (e.g., 4.0-4.7V, 4.0-5.1V).
- V ADJ Knob: Allows fine adjustment of the voltage for the selected USB output mode.
- SHOW VALUE Button: Mostra el volum actualtage/current of the USB output on the main digital meters.
To perform a USB stress test, connect the USB device to the appropriate USB port (USB-B1 or USB-B2), select the desired stress mode using the MODE switch, and observe the device's behavior under varying voltage conditions using the V ADJ knob.
5. Manteniment
Un manteniment regular garanteix la longevitat i el rendiment òptim de la vostra font d'alimentació.
- Neteja: Disconnect the power supply from the mains before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use abrasive cleaners or solvents.
- Ventilació: Periodically check that the ventilation slots on the top, sides, and rear of the unit are free from dust and obstructions. Use compressed air to clear any dust buildup.
- Substitució de fusibles: If the unit does not power on, check the fuse located on the rear panel next to the AC inlet. Disconnect the power cord, unscrew the fuse holder, and replace the fuse with one of the same type and rating (T 3.15A / 250V).
6. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| La unitat no s'encén. | No mains power; Blown fuse; Power switch off. | Check power outlet and cord; Replace fuse (see Maintenance); Ensure power switch is ON. |
| Sense sortida voltage / actual. | Output terminals not connected; Voltage/current knobs set to zero; OVP triggered. | Connect load correctly; Adjust VOLT/AMPERE knobs; Check OVP setting and reset if necessary. |
| C-LIMIT indicator is on. | Output current has reached the set limit. | Augmentar AMPERE setting or reduce load resistance. |
| SOBRE VOLTAGE indicator is on. | Volum de sortidatage exceeded OVP threshold. | Reduce output voltage or increase OVP ADJ setting. Cycle power to reset. |
7. Especificacions
| Marca | Voltcraft |
| Número de model | 1629370 (VC-8146850) |
| Dimensions del producte (L x A x A) | 26 x 35 x 12.5 cm |
| Pes de l'article | 9 quilos |
| Vol. De sortidatage (Output A) | 0 - 40 V (adjustable) |
| Output Current (Output A) | 0.01 - 5 A (adjustable) |
| Potència de sortida | 233 W |
| Nombre de sortides | 3 (1 main, 2 USB) |
| Característiques especials | High-precision multi-turn potentiometer, USB development port, Overvoltage Protecció (OVP) |
| Mètode de refrigeració | Aire |
| Tipus d'alimentació | Hand-operated (Mains powered) |
| Dispositius compatibles | dispositius USB |
| Tipus de connector | USB |
| Components inclosos | 1 unitat |
| Primer disponible | 28 de setembre de 2018 |
| País d'origen | Índia |
8. Garantia i Suport
For warranty information and technical support, please refer to the documentation provided with your purchase or contact VOLTCRAFT customer service. Keep your proof of purchase for warranty claims.
You can find more information and support resources on the official Voltcraft weblloc web o a través del vostre distribuïdor.
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