OWON OWH9811 1 Phase 3–600V / 0–20A RMS power meter
The OWH9811 Digital Power Meter is a professional single-phase 3–600V / 0–20A RMS power measurement instrument designed for accurate analysis of voltage, current, power, efficiency, and harmonics in industrial, laboratory, and R&D environments. With advanced digital processing, harmonic analysis, and full SCPI remote control support, the OWH9811 is ideal for both standalone measurements and automated test systems
OWH9811 Digital Power Meter – High-Precision Single-Phase Power Analysis
The OWH9811 Digital Power Meter is a professional single-phase power analysis instrument designed for accurate electrical measurements in industrial, laboratory, and R&D applications. It provides precise True RMS measurement of AC voltage, current, frequency, active power (W), apparent power (VA), reactive power (var), power factor, and phase angle, ensuring reliable results even with non-sinusoidal waveforms.
The instrument supports harmonic analysis up to the 63rd order, including individual voltage and current harmonic RMS values and total harmonic distortion (THD). This makes the OWH9811 well suited for power quality evaluation and testing of switched-mode power supplies, inverters, motor drives, and other nonlinear loads.
Integrated efficiency measurement functions allow direct evaluation of energy conversion performance in power supplies and inverter systems. Selectable voltage and current ranges provide optimal resolution across a wide operating range, while adjustable update rates down to 0.1 s enable real-time monitoring of dynamic load conditions.
With full SCPI and IEEE-488.2 compatibility, the OWH9811 can be easily integrated into automated test systems (ATE) and production test environments. Combined with programmable alarm limits and multiple display modes, it offers a reliable and flexible solution for precision single-phase power measurement.
Key Features & Benefits
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High-accuracy power measurement
Measures voltage, current, active power (W), apparent power (VA), reactive power (var), power factor, frequency, and phase angle with excellent stability and repeatability. -
Harmonic & THD analysis
Built-in harmonic measurement up to the 63rd order, including voltage and current THD, harmonic RMS values, and distortion factors—ideal for power quality analysis and compliance testing. -
Efficiency measurement support
Supports efficiency calculations with configurable equations, making the OWH9811 suitable for power supply, inverter, charger, and energy-conversion testing. -
Wide measurement ranges
Multiple selectable voltage and current ranges allow accurate measurements across low-power and high-power applications without sacrificing resolution. -
Fast update rate
Adjustable measurement update rates down to 0.1 s, enabling real-time monitoring and dynamic load testing. -
Alarm & limit functions
Programmable upper and lower limits for voltage, current, and power with delay settings—perfect for automated pass/fail testing and protection monitoring. -
SCPI & IEEE-488.2 compatible
Full SCPI command set allows seamless integration into automated test setups via PC or industrial controllers, reducing test time and improving repeatabilityTypical Applications
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Power supply and adapter testing
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Inverter and motor drive evaluation
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Energy efficiency and standby power measurements
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Power quality and harmonic analysis
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Production line testing and automated test systems (ATE)
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R&D laboratories and educational institutions
Why Choose the OWH9811?
The OWH9811 combines precision measurement, advanced harmonic analysis, and automation-ready connectivity in a cost-effective instrument. It is an excellent choice for engineers who need reliable, repeatable power data without the complexity or cost of high-end power analyzers.
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| Specification | OWH9811 | OWH9830 | ||
|---|---|---|---|---|
| CH1 | CH2 | CH1 | CH2 | |
| Model | OWH9811 | OWH9830 | ||
| Display | 3.95-inch TFT Screen | |||
| Update rate | 0.1s, 0.2s, 0.5s, 1s, 2s, 5s | |||
| Measurement items | V, A, W, VA, var, λ, fU, CfU, CfI, Upk, Ipk, THD | |||
| Measurement method | CH1: 1ph-AC | CH2: 1ph-AC+DC | CH1: 3ph-AC | CH2: 1ph-AC+DC |
| Voltage measurement range | 3.0V–600Vrms | 0V–1000Vpk*1 | 3.0V–600Vrms | 0V–1000Vpk*1 |
| Voltage range |
CF=3: 75V/150V/300V/600V CF=6: 37.5V/75V/150V/300V |
50V/100V/500V/1000V |
CF=3: 75V/150V/300V/600V CF=6: 37.5V/75V/150V/300V |
50V/100V/500V/1000V |
| Voltage accuracy | ±(0.4% of reading + 0.1% of range + 1 digit) | |||
| Voltage resolution | 0.01V / 0.1V | |||
| Current measurement range | 0–20.0Arms | 0–20Apk*1 | 0–20.0Arms | 0–20Apk*1 |
| Current range |
CF=3: 0.2A/1A/4A/20A CF=6: 0.1A/0.5A/2A/10A |
0.2A/1A/4A/20A |
CF=3: 0.2A/1A/4A/20A CF=6: 0.1A/0.5A/2A/10A |
0.2A/1A/4A/20A |
| Current accuracy | ±(0.4% of reading + 0.1% of range + 1 digit) | |||
| Current resolution | 0.001A | |||
| Range switching | Auto / Manual | |||
| Power range | 0–12kW | 0–20kW | 0–36kW | 0–20kW |
| Power accuracy | ±(0.4% of reading + 0.1% of range + 1 digit) | |||
| Power resolution | 0.01W / 0.1W / 1W | |||
| Power factor range | -1.000 ~ 1.000 | |||
| Power factor accuracy | ±(0.4% of reading + 0.1% of range + 1 digit) | ---- | ±(0.4% of reading + 0.1% of range + 1 digit) | ---- |
| Operating frequency | 40Hz–70Hz | DC + 40Hz–70Hz | 40Hz–70Hz | DC + 40Hz–70Hz |
| Frequency accuracy | ±(0.1% of reading + 1 digit) | ---- | ±(0.1% of reading + 1 digit) | ---- |
| Harmonic analysis | 2.8 kHz bandwidth, up to 63rd order | ---- | 2.8 kHz bandwidth, up to 63rd order | ---- |
| Integration function | Watt-hour (Wh), Ampere-hour (Ah) | |||
| Warm-up time | >30 min | |||
| Peak current | 60A | 30A | 60A | 30A |
| Maximum continuous input | Vrms=700V; Irms=24A | Vpk=1100V; Ipk=24A | Vrms=700V; Irms=24A | Vpk=1100V; Ipk=24A |
| Interface | RS232 | |||
| Communication protocol | Standard SCPI, Modbus protocol | |||
| Baud rate (bps) | 4800, 9600 (default), 19200, 38400, 57600, 115200 | |||
| Display hold | YES | |||
| Mute | YES | |||
| Key lock | YES | |||
| Power supply | AC 100V–240V, 50/60Hz | |||
| Operation environment |
18 °C ~ 28 °C, 30% ~ 75% RH (When operating temp. is outside 18 °C ~ 28 °C, add temp. coefficient: 0.05% of reading / °C) |
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| Storage environment | -10 °C ~ 50 °C, ≤ 80% RH (non-condensing) | |||
| Operating altitude | ≤ 2000 meters | |||
| Weight | 1.3 kg | |||
| Dimensions | 295mm(W) × 110mm(H) × 235mm(L) | |||
The accessories subject to final delivery.
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Power cord
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Voltage test leads
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Test leads
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User documentation
