DO3020C Single phase AC/DC Meter Calibration Device

This device is a 0.05 (0.1) level single-phase AC and DC standard device designed in accordance with the requirements of the verification regulation JJG124-2005 "Verification Regulation for Ammeters, Voltmeters, Power Meters, and Resistance Meters". The signal part of the source is composed of a controllable sine wave and distorted wave signal source using DSP and a 16 bit high-speed analog-to-digital converter. The circuit design is well protected, reliable in operation, and easy to operate. The monitor adopts a standard graphic 240 × 128 dot matrix LCD monochrome screen, with clear display of chart characters.

Main functions and indicators
The device consists of a single-phase AC voltage standard source, a current standard source, and a DC voltage standard source and current standard source.

2. It has a calibration function, which can correct the output value of the standard source based on the indication of the external standard.

3. Various single-phase AC power frequency indicators, such as voltmeters, ammeters, power meters, frequency meters, and various DC meters, with a level of 0.2 and below in the power system can be manually and semi automatically inspected.

4. It can generate distorted waves containing 2-31 harmonics, and the number, order, amplitude, and phase of harmonics on the fundamental wave can be programmed.

5. Equipped with RS-232 or USB interface and large capacity non-volatile memory, capable of storing 500 pieces of detection data from the tested meter. Through the upper computer software, the device can be controlled by a PC for automatic and manual inspection, and the results can be processed and managed.

Specification
AC output

Voltage range: 50V, 100V, 200V, 400V, 800V;

• Current range 0.5A, 1A, 2.5A, 5A, 10A, 20A;

• Adjustment range 0-120% (excluding 800V voltage);

Adjust the fineness to 5 × 10-5;

The maximum output capacity for voltage and current is 20VA

Voltage and current setting accuracy ± (0.03% RD+0.02% RG);

Voltage and current output stability ≤ 0.01%/60 s (peak to peak);

Voltage and current waveform distortion ≤ 0.3%;

Power output setting accuracy ± (0.06% RD+0.04% RG);

• Sinusoidal output frequency range (45-65) • N Hz (N=1, 2, 3,... 31);

Adjust the fineness to 0.001 • N Hz (N=1, 2, 3,... 31);

• Set accuracy to 0.01 Hz

Phase adjustment range: 0-359.99 °; Adjust the fineness by 0.01 °;

Harmonic output 2-31 times, amplitude 0-20% (rated fundamental value);

Phase fineness 0.01 °• N (where N is the harmonic order, N=2，3，4，……31）；

The output can contain multiple harmonics simultaneously, or the fundamental amplitude can be set to 0 to output a sine wave higher than the power frequency.

DC output

Voltage range: 200mV, 400V, 2V, 4V, 20V, 40V, 200V, 400V, 1000V;

• Current range: 0.1A, 0.3A, 1A, 3A, 10A, 30A;

Voltage and current regulation range 0-110% (excluding 1000V voltage and 30A current);

Voltage and current regulation fineness 5 × 10-5;

The maximum output capacity for voltage and current is 20W;

Voltage setting accuracy ± (0.03% RD+0.02% RG);

Current setting accuracy ± (0.06% RD+0.04% RG);

Voltage and current output stability ≤ 0.01%/60s (peak to peak);

Voltage and current output ripple ≤ 1%.

The working power supply is single-phase 220V ± 10%, 50Hz ± 5%.

The operating environment temperature is 20 ℃± 10 ℃, and the relative humidity is ≤ 85% RH

The volumetric weight is 440 × 460 × 165mm3, approximately 11kg.