At oilfield sites, design and selection personnel often encounter this problem: for the same pumping unit, power curves and balance rates obtained at different times with different instruments show obvious differences. Investigation reveals that the differences often come from the instrument's ability to distinguish positive and negative power, measurement stability under harmonic interference, and whether it has continuous recording and waveform analysis functions. The DZ-8100 Comprehensive Power Quality Analyzer is designed for such field pain points, with a built-in large-capacity lithium polymer battery pack, so field testing requires no external power supply and avoids additional errors introduced by fluctuations in power supply quality.
Conventional power testing instruments mostly focus on reading steady-state parameters and have limited support for transient data and waveform recording. The DZ-8100 is equipped with a 320*240 dot-matrix large screen that can display various data curves. Combined with a USB drive, it can comprehensively record and store transient data and waveforms of power-consuming equipment, analyze the data, and plot and print change curves for voltage, current, and power (with the ability to distinguish positive and negative power). This function provides traceable data support for rationally adjusting the balance blocks of oilfield pumping units, evaluating fan efficiency, and carrying out power balance work for coal mine electrical equipment and enterprises.
Targeting the harmonic control and reactive power compensation issues of concern to design and selection personnel, the instrument supports 1st to 50th voltage and current harmonic analysis, and harmonic measurement provides both data and waveform display methods. It can produce vector diagrams, display each phase value and phase difference, and automatically calculate the amount of local reactive power compensation. Compared with simple instruments that only provide total harmonic distortion, these functions facilitate judgment of load characteristics and compensation schemes during the selection stage.
The instrument can calculate 9 parameters of motor economic operation and 7 parameters of motor operating characteristics, and automatically calculate the balance rate and upstroke and downstroke parameters of pumping units. For design and selection work involving motor energy efficiency evaluation and pumping unit balance adjustment, these calculation items reduce the need for manual secondary processing.
Grid frequency measurement range: 10–80 Hz; current and voltage accuracy: Class 0.5; power accuracy: Class 1.0; voltage and current measurement error: ≤±0.1%. The instrument has high measurement accuracy, simple operation, and complete functions, and is suitable for comprehensive analysis of power parameters in production, manufacturing, and energy-saving management in industries such as railway, refrigeration, electric power, chemical, and machinery.
