Rigol DP832 vs. Modern Triple Output DC Power Supplies
The Rigol DP832 is one of the most popular programmable DC power supplies on the market. But is it the best value for your bench? Let's compare it with modern alternatives.
When engineers look for a reliable, programmable triple output DC power supply, the Rigol DP832 is often the first model that comes to mind. It's a solid machine with a great reputation. However, for many labs, educational institutions, and hobbyists, the eTM-DM series offers a compelling alternative that delivers comparable precision at a more accessible price point.
Head-to-Head Specification Comparison
| Feature | Rigol DP832 | eTM-3030DM (Alternative) |
|---|---|---|
| Channels | 3 (Isolated) | 3 (Isolated) |
| Output Rating (CH1/CH2) | 30V / 3A | 30V / 3A |
| Output Rating (CH3) | 5V / 3A | 5V / 3A |
| Ripple & Noise | < 350 μVrms | < 1 mVrms |
| Programming Resolution | 1mV / 1mA | 1mV / 0.1mA |
| Display | 3.5" TFT | High-Contrast LED/LCD |
| Interfaces | USB, LAN, RS232 | USB, RS232/485 |
| Price Range | Premium ($450+) | Value-Optimized |
Where the Rigol DP832 Excels
- Graphical Interface: The DP832 features a large TFT screen that can display voltage/current curves over time directly on the unit.
- Ultra-low Noise: At < 350 μVrms, it is exceptionally quiet, making it ideal for the most sensitive RF and audio applications.
Why Choose the eTM-DM Series?
- Cost-Effectiveness: You get the same 30V/3A + 5V/3A triple-output configuration and SCPI programmability at a fraction of the cost. Perfect for outfitting multiple benches in a university lab or production line.
- Readback Resolution: The eTM-DM series offers 0.1mA current readback resolution, which is excellent for profiling low-power IoT devices.
- Robust Simplicity: Without the complex graphical OS, the eTM series boots instantly and provides immediate, tactile control via dedicated knobs—preferred by many engineers for quick bench work.
The Verdict
If your budget allows and you absolutely need on-device graphical charting or sub-millivolt noise floors, the Rigol DP832 is a fantastic instrument. However, if you need a reliable, programmable, linear triple-output power supply for daily bench testing, IoT development, or educational labs, the eTM-DM series provides unmatched value without compromising on core performance.