1. Overview

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 monitor adopts a standard graphic 240 × 128 dot matrix LCD monochrome screen, with clear display of chart characters. The circuit design is well protected, reliable in operation, and easy to operate.

2. Technical parameters

2.1 Communication output

Voltage range: 200mV, 400mV, 2V, 4V, 20V

100V、 200V、500V、1000V；

Current range 2mA, 4mA, 20mA, 40mA, 0.2A

0.5A、 2A、 5A、10A、20A；

Adjustment range 0-120% (excluding 1000V voltage);

Adjust the fineness to 5 × 10;

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

Accuracy of voltage and current setting

±（0.03%RD + 0.02%RG）；

(Excluding gears below 40mA and 4V)

Voltage and current output stability ≤ 0.01%/60s;

(Excluding gears below 40mA and 4V)

Voltage and current waveform distortion ≤ 0.3%;

(Excluding gears below 40mA and 4V)

The accuracy of the sine wave output frequency setting value is 0.01Hz;

Phase adjustment range: 0-359.99 °;

Phase adjustment fineness of 0.01 °;

Harmonic output 2-31 times, amplitude 0-20%

(Rated value of fundamental wave);

Harmonic phase fineness 0.01 ° N

(N is the harmonic order, N=2, 3, 4,... 31);

The output can contain multiple harmonics simultaneously, or it can be based on

The wave amplitude is 0, and the output is a sine wave higher than the power frequency.

2.2 DC output

Voltage range: 200mV, 400mV, 2V, 4V, 20V

40V、100V、200V、400V、1000V；

Current range: 20 μ A, 40 μ A, 200 μ A, 400 μ A

2mA、4mA、20mA、40mA、0.2A、

1A、2.5A、5A、10A、20A；

Voltage and current regulation range 0-110%

(excluding 1000V voltage);

Voltage and current regulation fineness 5 × 10;

The maximum voltage output capacity is 20W;

The maximum current output capacity is 20W;

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

Accuracy of current setting ± (0.06% RD+0.04% RG);

Voltage and current output stability ≤ 0.01%/60s;

Voltage and current output ripple ≤ 1%.

Point frequency square wave

Point frequency square wave output 1kHz, 5kHz, 10kHz, 50kHz

100kHz、200kHz、1000kHz；

Square wave amplitude 4.5V;

The accuracy of the set value is 5 × 10.

Electronic resistance box output

Range 0-200 Ω, 0-2k Ω, 0-20k Ω

0-2000 Ω, 0-2M Ω;

Fineness 0.025%;

Setting accuracy ± (0.12% RD+0.08% RG)

(Excluding 0-200 Ω and 0-2M Ω ranges)

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 × 165mm, approximately 12kg.

3. Main functions and features

3.1. The device consists of an output single-phase AC voltage standard source, a current standard source, a DC voltage standard source, and a current standard source.

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

3.3. Digital multimeters, pointer multimeters, and installed digital instruments, including those with DC analog output, can be manually and semi automatically inspected for levels 0.2 and below.

3.4. 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.

3.5. It is equipped with an RS-232 interface and a large capacity non-volatile memory, which can store 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.