PSU 12.5-120 - Uncategorized GW Instek - Free user manual and instructions
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| Product Type | Programmable DC Power Supply |
| Brand | GW Instek |
| Model | PSU 12.5-120 |
| Output Voltage | 0 to 12.5 V |
| Output Current | 0 to 120 A |
| Maximum Power | 1500 W |
| Input Voltage | 100-240 VAC, 50/60 Hz |
| Dimensions (W x H x D) | 430 x 88 x 460 mm (2U rackmount) |
| Weight | Approximately 12 kg |
| Cooling Method | Internal fan, temperature-controlled |
| Interface | USB, RS-232, GPIB (optional) |
| Programming Accuracy | 0.1% + 10 mV (voltage), 0.1% + 100 mA (current) |
| Ripple & Noise (20 MHz BW) | < 50 mVpp, < 5 mArms |
| Protection Features | OVP, OCP, OTP, reverse polarity protection |
| Display | 4-digit LED, voltage and current |
| Remote Sensing | Yes (compensates for voltage drop) |
| Operating Temperature | 0°C to 40°C |
| Storage Temperature | -20°C to 70°C |
| Maintenance | Clean exterior with dry cloth; check fan periodically |
| Safety Standards | CE, UL, IEC 61010-1 |
| Accessories Included | Power cord, user manual, test report |
Frequently Asked Questions - PSU 12.5-120 GW Instek
How do I set the output voltage on the PSU 12.5-120?
Press the Voltage key, then use the rotary knob or numeric keypad to enter the desired voltage. Confirm with the Enter key.
How do I set the current limit?
Press the Current key, adjust the value using the knob or keypad, and press Enter. The power supply will operate in constant current mode if the load draws more than this setpoint.
Can I use this power supply for battery charging?
Yes, but you must set the correct voltage and current limits for your battery chemistry. The PSU 12.5-120 provides constant voltage/constant current operation suitable for charging.
What is remote sensing and how do I connect it?
Remote sensing compensates for voltage drops in load leads. Connect the sense terminals (+S and -S) directly to the load. On the PSU 12.5-120, enable remote sensing via the front panel or remote interface.
How do I program the power supply via computer?
Use the USB or RS-232 interface with SCPI commands. Install the provided software or use a terminal emulator. Refer to the programmer's manual for command syntax.
What does OVP protection do?
Over-Voltage Protection (OVP) shuts down the output if the voltage exceeds a preset threshold. You can set the OVP level via the front panel; the default is typically 110% of rated voltage.
How do I clean and maintain the power supply?
Disconnect from mains. Use a soft dry cloth to clean the exterior. Periodically check that the fan is free of dust. Do not use liquid cleaners or open the chassis.
Can I operate multiple units in series or parallel?
Yes, the PSU 12.5-120 supports series (for higher voltage) and parallel (for higher current) operation. Use the Track or Parallel mode settings. Ensure proper derating for parallel connections.
What is the maximum load capacitance?
The PSU 12.5-120 can drive capacitive loads up to 10,000 µF without stability issues. Larger capacitors may cause oscillation; use the Slow Start mode if needed.
How do I recall a saved memory preset?
Press the Recall key, use the knob to select the memory number (M1 to M10), and press Enter. The preset voltage and current will be applied.
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