DO3001A AC/DC meter transmitter calibration device

1 Overview

This device is designed as a three-phase meter source integrated device in accordance with the requirements of the verification regulations JJG126-95 "Verification Regulations for Electrical Measurement Transmitters for AC to DC Conversion", JJG124-2005 "Verification Regulations for Ammeters, Voltmeters, Power Meters, and Resistance Meters", JJG 596-1999, and JJG 307-2006. The core technology of the meter in the device is a high-precision AC collector composed of a digital signal processor (DSP) and a 16 bit high-speed analog-to-digital converter; The signal part of the source is composed of DSP and 16 bit high-speed analog-to-digital converter to form a controllable sine wave and distorted wave signal source. The device has the characteristics of high precision, stable and reliable operation, and convenient and flexible operation.

2 Main functions and features

2.1 It can semi automatically or manually inspect the basic errors of various power frequency meters (voltmeter, ammeter, power meter, frequency meter, power factor meter, phase meter) in the power system, as well as the changes caused by factors such as voltage, current, waveform, and power factor.

2.2 It can automatically verify the basic errors of electrical measurement transmitters (voltage transmitters, current transmitters, power transmitters, frequency transmitters, power factor transmitters, electrical energy transmitters), as well as the changes caused by factors such as voltage, current, waveform, and power factor.

2.3 The power supply section can generate distortion waves with 2-31st harmonics, and the number, order, amplitude, and phase of harmonics on the fundamental wave can be programmed.

The working frequency band of the 2.4 amplifier is 40Hz-1kHz, with good linearity. The current amplifier is a constant current source, and the voltage amplifier is a constant voltage source. Due to its lightweight, this device is more suitable for on-site verification.

2.5 is equipped with an RS-232 interface. Through the upper computer software (optional), this device can be controlled by a computer for automatic or manual inspection, and the results can be processed and managed.

2.6 It is equipped with a large capacity non-volatile memory that can store 300 pieces of raw data from the tested instruments for reference and uploading.

2.7 The electric energy meter can be calibrated by detecting the load point or selecting the point according to the electric energy meter.

3 main technical indicators

3.1 AC voltage range: 50V, 100V, 200V, 400V, 800V, maximum output capacity: 20VA;

3.2 AC current range 0.5A, 1A, 2.5A, 5A, 10A, 20A, maximum output capacity 20VA;

3.3 AC voltage and current regulation range 0-120% FS, regulation fineness 5 × 10-5;

3.4 Power frequency AC voltage and current accuracy of 0.05% FS;

3.5 Active power (50V~400V) accuracy 0.05% FS;

3.6 Reactive power (50V~400V) accuracy 0.1% FS;

3.7 The phase accuracy of current to the same phase voltage is 0.050;

3.8 Frequency adjustment range of 45-65Hz, adjustment fineness of 0.001Hz, and accuracy of setting value of 0.01Hz;

3.9 Phase adjustment range 0~359.990, adjustment fineness 0.010;

The power factor adjustment range is 0 to ± 1, and the adjustment fineness is 0.0001;

3.10 AC voltage and current output waveform distortion ≤ 0.3%;

3.11 AC voltage, current, and power output stability ≤ 0.01% FS/60s;

3.12 Harmonics 2-31, amplitude 0-40%, phase fineness of each harmonic 0.010 • N (N is the harmonic order);

3.13 DC voltage range: 75V, 75V, 150V, 300V, 500V, 1000V, maximum output capacity: 20W;

3.14 DC current range 0.5A, 1A, 2.5A, 5A, 10A, 20A maximum output capacity 20W;

3.15 DC voltage and current regulation range 0-120% FS (1000V range 0-105% FS), regulation fineness 5 × 10-5;

3.16 DC voltage and current output stability ≤ 0.01% FS/60s (peak to peak);

3.17 Accuracy of DC voltage setting value 0.05% FS;

3.18 Accuracy of DC current setting value 0.1% FS;

3.19 DC 75mV output (load ≥ 5 Ω) accuracy 0.1% FS;

3.20 DC measurement accuracy (for transmitter output measurement) 0.02% FS (voltage 0~± 24V, current 0~± 24mA);

3.21 Comprehensive error of electric energy meter measurement (50V~400V) is 0.05% (pulse output: three-phase rated value=6Hz);

3.22 Working power supply single-phase 220V ± 10%, 50Hz ± 5%;

3.23 Operating environment temperature of 200C ± 100C, relative humidity ≤ 85% RH;

The volume and weight of 3.24 are approximately 460 × 430 × 185mm3, 20kg (24kg for luxury chassis).

Weifang Huaqi Instrument Manufacturing Co., Ltd

117 Wolong East Street, Weifang Development Zone, Shandong Province

Tan Guoqiang 0536-8781162; Fax 8781167;

Email: 630118296@qq.com