User manual for Extech 382275/382276 lab‑grade switchable DC power supplies with safety, operation, and technical specifications.
This manual provides safety warnings, power‑up checks, and detailed operating instructions for the Extech 382275 (120 V) and 382276 (230 V) single‑output laboratory‑grade switchable DC power supplies. It covers the four operating modes—Normal, Preset, Set, and Remote—and explains how to use the rotary encoders, remote‑control connector, and manual zero function.
The document also includes maintenance guidance, overload and over‑temperature protection information, and a full set of technical specifications such as output voltage/current ranges, accuracy, input requirements, and physical dimensions. This manual is written in Chinese.
| Output Voltage Range | 1 to 30 VDC |
|---|---|
| Output Current Range | 1 to 20 A |
| Voltage Accuracy | ±(0.2% +3 digits) |
| Current Accuracy | ±(0.2% +3 digits) |
| Input Voltage (382275) | 100 to 120 VAC, 50/60 Hz |
| Fuse Rating (382275) | 8 A / 250 V (delay) |
| Efficiency at Full Load | 87 % |
| Dimensions (W×H×D) | 200 × 90 × 215 mm |
| Weight | 2.6 kg |
Press and hold the voltage control knob for 30 seconds to access the menu, then follow the on‑screen prompts to reset the presets.
Do not operate the power supply near water, do not touch it with wet hands, and keep the enclosure away from moisture.