PRODUCT
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DO3020G DC energy meter calibration device


This device is now a 0.05 level calibration device trial-produced in accordance with the State Grid Corporation of China’s corporate standards *Q/GDW1826-2013 "Technical Specifications for DC Energy Meter Calibration Devices" and Q/GDW1825-2013 "Technical Specifications for DC Energy Meters".

  • Product description
  • product description
    This device is now a 0.05 level calibration device trial-produced in accordance with the State Grid Corporation of China’s corporate standards *Q/GDW1826-2013 "Technical Specifications for DC Energy Meter Calibration Devices" and Q/GDW1825-2013 "Technical Specifications for DC Energy Meters". It is mainly used to calibrate 0.5 Level, 1.0 level DC energy meter. The device is mainly composed of a DC standard voltage source, a DC standard current source, a standard timer, a digital-frequency converter (DFC), a control microcontroller, a keyboard, a display, etc. It can be operated by the machine or by the computer through the interface. The maximum output voltage range of the device is 700V, the maximum output current range is 100A, and it is equipped with a 100mV output terminal. The device can be used to calibrate 100A, 50A, 20A and 100mV, 75mV and other DC energy meters with external shunts. The device can be programmed to control fully automatic meter checking or manual meter checking. The inspection points of the automatic inspection meter comply with the requirements of 5.3 in Q/GDW 1825-2013 (when verifying the basic error of level 0.5 and level 1.0 meters, the ambient temperature should be controlled within the range of (23±2)℃, and the humidity should be (50%±20 %)RH). The voltage and current output of the device are one channel each. When the user needs, the voltage output can be changed to multiple channels.

    Main Specifications
    ·Voltage and current range
    Rated voltage (Un) 100V, 350V, 500V, 700V
    Calibrated current (Ib) 75mV, 2A, 20A, 50A, 100A
    ·Adjustment range and fineness
    Range 0~120%Un, 0~120%Ib
    Fineness 0.01% Un, 0.01%Ib
    ·Output Power
    Voltage Max 30W
    Current Max 150W
    ·Ripple coefficient of voltage and current output ≤±1%
    ·Voltage, current and power output stability ≤0.01%
    ·Basic error of this device under reference conditions
    1. Basic error at reference voltage
    0.5Ib≤I≤1.2Ib ±0.05%
    0.05Ib≤I<0.5Ib ±0.07%
    2. Basic error at reference current
    0.4Un≤U≤1.1Un ±0.05%
    0.1Un≤U<0.4Un ±0.07%
    ·Allowable relative error of standard timer ±0.002%
    · Repeatability of device measurements
    Expressed as experimental standard deviation limit: 0.005%
    ·DFC output frequency is 20KHz at various power outputs of Un·Ib
    ·Power supply: single-phase 220V±10% 50Hz±5%
    ·Using environment within the range of 20℃±10℃, relative humidity ≤85%RH
    ·Outline dimensions: 460×460×175mm
    Weight: about 13kg
    *When there are corresponding national standards and verification regulations, new product technical specifications will be followed up.