Digital Power Meter | IT9121

ITECH IT9121E - Digital Power Meter, Voltage: 15–600 V, Current: 5 mA–20 A

Power analysis for development & production
The ITECH IT9121 is an AC/DC power meter (power analyzer) for power and energy analysis from the lab to series production. It captures electrical quantities with precision, presents readings clearly, and supports quality assurance, efficiency optimization, and compliance in power-supply testing as well as at the ATE test bench. Proven in test & measurement, it operates as a power and energy meter, provides reliable data for power measurement, and measures energy consumption transparently.

Measured quantities – fully covered
The IT9121 delivers comprehensive energy and consumption analysis with trend display and reporting—ideal for power-quality assessments and product validation. It measures voltage and current and also captures active power, reactive power, and apparent power. Also in view: power factor (PF), frequency, and phase angle.
The instrument is designed for single-phase two-wire systems (1P2W) and integrates into automated systems. When required, it operates as a digital multimeter and measures voltage, current, and resistance within the defined measurement range.

Harmonics & THD in focus
Harmonic mode analyzes individual harmonics (including phase) and total harmonic distortion (THD). List and bar charts make distortion immediately visible—useful for EMC-adjacent assessments, power-supply optimization, drives, and lighting. The power-quality functions deliver consistent results across the entire measurement range and increase confidence when evaluating electrical measurements.

Clear display & configurable layouts
The high-resolution color display offers single view, multi-field layout, and a trend view for time histories. Configurable views support precise analysis and quick decisions at the bench. High accuracy simplifies the evaluation of active and apparent power.

Interfaces for any test stand
USB, RS-232, LAN, and GPIB enable remote control, ATE integration, and seamless connection to existing data flows. Data acquisition with export functions ensures complete documentation and supports audit-ready processes; it is compatible with data-logger workflows and current-transformer setups. Accessories such as test leads and adapters are supported, and calibration remains traceable. In ATE environments, the system streamlines digital-multimeter tests with consistent readings across defined measurement ranges.

IT9121 power meter specifications

• Voltage: 6 ranges from 15 V to 600 V
• Current: 12 ranges from 5 mA to 20 A
• Power-measurement accuracy: frequency-dependent up to 100 kHz; example 45–66 Hz: ±0.2% of S at λ = 0
• External current-sensor inputs: EX1: 50 m to 2 V, EX2: 2.5 to 10 V
• Frequency bandwidth: DC, 0.5 Hz to 100 kHz
• Accuracy (voltage & current): ±0.1% of reading + ±0.2% of range
• Harmonics & THD: harmonic mode up to the 50th order showing U/I/P harmonics, THD (U/I/P), and phase angles; PLL tracking of the fundamental from 10 Hz to 1.2 kHz
• Display: 4.3″ color TFT (480 × 272 px) with 3 selectable views and freely configurable parameter views
• Oscilloscope & trend view: display of V/I waveforms with history and histogram; USB host for saving data and waveforms
• Interfaces: USB, RS-232, LAN, GPIB (optional)
• Topology: single-phase, two-wire system (1P2W)
• A/D conversion: 18-bit resolution, max. 10 µs conversion time
• Filters: switchable line/frequency filters with 200/500 Hz cutoff for smoother displays, stable averages, and fewer outliers
• Synchronization: selectable source (V / I / period) for stable phase/frequency references and reliable power, THD, and harmonic values
• Power supply: 100–240 VAC, 47–63 Hz; max. 50 VA power consumption

IT9121 application examples

• UPS (uninterruptible power supplies)
• Switching power supplies
• ENERGY STAR-compliant testing
• Motors/drives
• Household appliances