Owon OWH9811 power meter
Details
The Owon OWH9811 is a dual-channel, single-phase AC/DC power meter for two-wire measurements. Channel 1 is the AC main input — 3V to 600V at up to 20A RMS, with accuracy up to ±0.2%. Channel 2 covers AC+DC up to 1000V/20A, optimised for DC applications. This makes the meter well-suited for input and output efficiency measurements, with a customisable efficiency calculation built in.
The device measures voltage, current, active power (W), apparent power (VA), reactive power (var), power factor, frequency, crest factor, peak values and THD simultaneously, with harmonic analysis up to the 63rd order. Results appear on a 3.95-inch colour TFT in numeric, waveform or bar-graph mode at 0.1s–5s update rates. The integration function logs watt-hours and ampere-hours over time. Finally, an RS-232 interface handles remote control, and a USB host port saves measurements and screenshots to external storage for up to 72 hours of long-term recording.
Model overview
| OWH9811 | OWH9830 | |
|---|---|---|
| Phases | Single-phase | Three-phase |
| Price |
Specifications
| Measurement channels | 2 (CH1: 1-phase AC, CH2: 1-phase AC + DC) |
| Voltage range CH1 (AC) | 3 - 600 V |
| Voltage range CH2 (AC + DC) | 0 - 1000 V |
| Max. AC/DC current | 20 A |
| Power range | 0 - 12 kW (CH1) / 0 - 20 kW (CH2) |
| Harmonic analysis | 2.8 kHz, up to 63rd order |
| Other functions | Diode, Continuity, Min/Max record, Peak/Data hold, Auto power-off |
| True-RMS | Yes |
| Data logging | Yes, up to 72 hours |
| Display | 3.95" TFT colour |
| Connectivity | RS-232 |
| Dimensions | 295 x 110 x 235 mm |
| Weight | 1.3 kg |
Accessories
The Owon OWH9811 power meter is delivered with:
- 1x Power cord
- 1x Banana to aligator clip
- 1x RS232 cable
Pros and cons
- Affordable tool to perform power measurements or efficiency measurements
- Can log data for up to 72 hours
Downloads
| OWH9811 programming manual |  (277.09 KB) | Download |
| OWH9800 series quick guide | (949.41 KB) | Download |
| OWH9800 serie user manual | (1.94 MB) | Download |
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