1. Introducció
The TOPCHANCES KPS1203D is a single-output, high-precision, double LED display switch DC power supply. Designed for various applications requiring stable and adjustable DC power, this unit features complete operating protection functions, high performance, low ripple, high stability, and a compact, lightweight design. Its current limiting protection safeguards both the power supply and connected loads from accidental damage. The integrated low-temperature control circuit and cooling fan ensure quiet operation.
2. Instruccions de seguretat
- Connecteu sempre la font d'alimentació a una presa de corrent amb connexió a terra.
- Assegureu-vos que l'entrada voltage selector switch on the rear panel is set correctly (110V or 230V) before connecting to mains power. Incorrect setting can cause severe damage to the unit.
- No feu funcionar la font d'alimentació en llocs humits o secs.amp condicions.
- No obriu la c.asing de la font d'alimentació. No hi ha peces a l'interior que l'usuari pugui reparar. Demaneu totes les tasques de manteniment a personal qualificat.
- Avoid blocking the ventilation openings to prevent overheating.
- Ensure output terminals are correctly connected to the load. Reverse polarity can damage the load or the power supply.
- Desconnecteu l'alimentació abans de fer o canviar les connexions als terminals de sortida.
3. Producte acabatview
3.1 Controls i indicadors del tauler frontal

Descripció de la imatge: This image displays the front panel of the TOPCHANCES KPS1203D DC Power Supply. Key features visible include:
- LED Displays: Two red digital displays show the output voltage (V) and current (A) simultaneously.
- Voltage Adjustment Knobs: Labeled 'COARSE' and 'FINE' for voltage (V) adjustment, allowing for precise control.
- Current Adjustment Knobs: Labeled 'COARSE' and 'FINE' for current (A) adjustment, enabling precise current limiting.
- Terminals de sortida: Red (+) and Black (-) terminals for connecting the load.
- Interruptor d'alimentació: A rocker switch to turn the unit ON/OFF.
- Llums indicadores: Small green and red LEDs indicate operational status (e.g., constant voltage (CV) or constant current (CC) mode).
3.2 Característiques del panell posterior

Descripció de la imatge: This image shows the rear panel of the power supply. Prominent features include:
- Presa d'entrada d'alimentació CA: A standard IEC C14 inlet for connecting the AC power cord.
- Ventilador de refrigeració: A circular fan grille for heat dissipation, crucial for maintaining optimal operating temperature.
- Voltage Interruptor selector: A red slide switch, clearly labeled "115V" and "230V", used to select the appropriate input voltage for your region. This switch is critical for safe operation.
4. Configuració
- Desembalatge: Traieu amb cura la font d'alimentació i tots els accessoris de l'embalatge. Inspeccioneu-ho per veure si hi ha signes de danys.
- Col·locació: Place the power supply on a stable, level surface, ensuring adequate ventilation around the unit, especially the rear cooling fan.
- Entrada Voltage Selecció:
Localitza el volum vermelltage selector switch on the rear panel. Using a small screwdriver or similar tool, slide the switch to match your local mains voltage (110V for North America, 230V for most of Europe and other regions). Failure to set this correctly will damage the unit.

Descripció de la imatge: This image highlights the red voltage selector switch on the rear panel, showing the "115V" and "230V" settings. It is crucial to select the correct voltage before connecting the power supply to the mains.
- Connecteu el cable d'alimentació: Insert the provided AC power cord into the AC power input socket on the rear panel. Do not connect the other end to a wall outlet yet.
- Prepare Output Lines: Connect the provided output lines to the red (+) and black (-) output terminals on the front panel. Ensure a secure connection.
- Connectar a la càrrega: Connect the other end of the output lines to your device or circuit (load). Ensure correct polarity: red to positive, black to negative.
5. Instruccions de funcionament
- Encesa inicial:
After ensuring all connections are correct and the input voltage is selected, plug the AC power cord into a grounded wall outlet. Turn on the power supply using the front panel power switch. The LED displays should illuminate, showing initial voltage i lectures actuals.
- Ajust Voltage:
Use the 'COARSE' voltage knob (V) for large adjustments and the 'FINE' voltage knob (V) for precise adjustments. Rotate clockwise to increase voltage, counter-clockwise to decrease. Observe the voltage display (V) to set the desired output voltage.
- Ajust del límit de corrent:
The power supply features current limiting protection. To set the current limit:
- Method 1 (Without Load): Short-circuit the output terminals (connect red to black) using a thick wire for a brief moment. The current display will show the maximum current. Adjust the 'COARSE' and 'FINE' current knobs (A) to set the desired current limit. Remove the short circuit.
- Method 2 (With Load): With the load connected, set the voltage to zero. Turn the current knobs (A) to their maximum clockwise position. Slowly increase the voltage until the desired current is drawn by the load. Then, slowly decrease the current knobs (A) until the current display shows the desired limit. The power supply will then operate in Constant Current (CC) mode if the load attempts to draw more current than the set limit.
The green LED indicates Constant Voltage (CV) mode, and the red LED indicates Constant Current (CC) mode.
- Operation with Load:
Una vegada voltage and current limits are set, the power supply will maintain the set voltage unless the load attempts to draw more current than the limit, in which case it will switch to CC mode to protect the load and the power supply.

Descripció de la imatge: This image shows the TOPCHANCES KPS1203D power supply with its red and black output leads connected to the front panel terminals. The leads are terminated with alligator clips and spade connectors, illustrating how to connect the power supply to a circuit or device.
- Apagant:
Before turning off the power supply, it is recommended to reduce the output voltage and current to zero. Then, switch off the power supply using the front panel switch and disconnect the AC power cord from the wall outlet.
6. Manteniment
- Neteja: Feu servir un drap suau i sec per netejar l'exterior de la font d'alimentació. No utilitzeu productes de neteja abrasius ni dissolvents.
- Ventilació: Periodically check that the cooling fan and ventilation openings are free from dust and obstructions. A clogged fan can lead to overheating.
- Emmagatzematge: Quan no la feu servir durant períodes prolongats, guardeu la font d'alimentació en un lloc fresc i sec, allunyat de la llum solar directa i de temperatures extremes.
7. Solució De Problemes
| Problema | Causa possible | Solució |
|---|---|---|
| No power, displays off |
|
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| Sense sortida voltage/actual |
|
|
| Vol incorrectetaglectura de corrent electrònic |
|
|
| La unitat es sobreescalfa |
|
|
8. Especificacions
| Paràmetre | Valor |
|---|---|
| Vol d’entradatage | AC 110V/50Hz (Switchable to 230V) |
| Volum de sortidatage | 0 - 120V |
| Corrent de sortida | 0 - 3A |
| Voltage resolució | 0.1/1V |
| Resolució actual | 0.01A |
| Efecte de potència | CV≤1%+10mV |
| Efecte de la càrrega | CV≤1%+10mV |
| Onda i soroll | Vp-p≤1% |
| Voltage display precision | 1% + 1 dígits |
| Current display precision | 1% + 2 dígits |
| Entorn operatiu | (-10-45)°C, RH<90% |
| Pes | 2.00 kg |
| Mida de la màquina (mm) | 81 (width) × 165 (height) × 220 (length) |

Descripció de la imatge: Aquesta imatge proporciona una dimensionalitat view of a similar KPS series power supply (KPS9605D is shown, but dimensions are illustrative for the KPS1203D). It indicates the approximate width (8.4cm), height (16.7cm), and length (21.1cm) of the unit, helping users understand its physical footprint. Note that the model number in the image is KPS9605D, but the dimensions are representative of the compact design of the KPS series.
9. Contingut del paquet
Els articles següents s’inclouen al paquet:
- 1 x DC Power Supply (TOPCHANCES KPS1203D)
- 1 x cable d'alimentació
- 1 x Output Line (with alligator clips/spade connectors)
- 1 x Instruction Book (this manual)
10. Garantia i Suport
For warranty information, technical support, or service inquiries, please refer to the purchase documentation or contact the TOPCHANCES customer support directly. Keep your purchase receipt as proof of purchase.
Sovint podeu trobar les dades de contacte d'assistència a la pàgina oficial del fabricant weblloc web o a través del venedor on es va comprar el producte.