The Yokogawa 2505 Digital AC Meter is used in 3-phase 4-wire circuit for measuring true rms value of voltage and current, and power all at ±0.25% accuracy. Merely by depressing front-panel pushbutton, the 2505 provides direct digital reading of voltages (4 ranges from 100 to 600 V), current (4 ranges from 2 to 20 A) or power (from 200 W to 12 kW) in each phase, or total power (from 600 W to 36kW) by means of three-wattmeter method. Incorporating the patented "feedback time division mulitiplier" of excellent stability and noise performance in each phase, this instrument solves the perplexing problems of accurate measurement for 3-phase 4-wire circuit, sinusoidal and non-sinusoidal (distorted) waves, and of measurement at low power factor.
This instrument is also usable for accurate measurements of 3-phase 3-wire and single-phase circuits, as well as for unbalanced 3-phase 4-wire circuit.
The 2505 is adaptable for analog recording instrument and data processing system since it provides ten analog outputs (voltage, current and power per phase, and total power), BCD output and remote control.
||100V / 150V / 300V / 600V
||2A / 5A / 10A / 20A
||200W to 12kW (single phase) / 600W to 36 kW (3 phase, 4 wire)
||± (0.25% of reading + 0.05% of range), 50 to 60 Hz
|Volts, Amps, Watts:
||± (0.5% of reading + 0.1% of range), 25Hz to 2kHz
|Volts and Amps:
||± (0.5% of reading + 0.1% of range), 40Hz to 1.2kHz Watts
||up to 2 (1,000V peak max)
||up to 3 (50A peak max)
|Impedance and Burden
||Approx. 50kW on 100V, 100kW on 150V, 400kW on 300V, 1.5MW on 600V, range. Approx. 0.1VA on 2A, 0.4VA on 5A, 1VA on 10A, 2VA on 20A range
|Power Factor Error
||Usable from zero power factor to unity, additional error; less than ±0.25% (single phase), ±0.5% (3 phase, 4 Wire) of reading
||5VDC, load current 1mA (max.)