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DO30-III multifunctional calibrator


The DO30-3 multifunctional calibrator (hereinafter referred to as the calibrator) has a six-digit LCD screen to digitally display output value, error of the meter under inspection, output percentage, full scale value of the meter under inspection, step value, frequency and other parameters. AC and DC voltage and current calibration sources. There is also a 22-level standard resistor set to facilitate calibration of multimeter resistance levels. Equipped with RS232 interface to realize automatic data processing function.

  • Product description
  • 1. Things to note

    1.1 Please read the instruction manual carefully before use.

    1.2 The instrument should be placed in a dry and clean place with good ventilation, away from direct sunlight, and the heat dissipation holes of the instrument should not be blocked. The power supply voltage of this instrument is 220V±10%, and the frequency is 50Hz±1Hz. The ground wire on the power socket should be well grounded.

    1.3 Before starting the machine, set the output item selection switch to the neutral position. Do not connect the output end to the instrument being tested to avoid damage to the instrument due to improper gear selection.

    1.4 Turn on the power switch and preheat for 5 minutes (when it is not used for a long time or the humidity is high, the preheating time should be longer), and then select the corresponding range, full scale and N value according to the item and range of the instrument being tested.

    1.5 If the calibrator is connected to the computer, it should be connected before starting the computer. Do not operate it while the power is on.

    1.6 If the voltage output exceeds the safe voltage, the calibrator prompts "high voltage". Please pay attention to safety during operation.

    1.7 Select the output port of the calibrator according to the item and gear of the meter being tested, and use a test line to reliably connect the meter being tested and the calibrator. When testing high voltage, test wires with insulation strength above 1500V should be used; when testing current, test wires with current density of about 3A/mm2 should be used.

    1.8 When the prompt window on the display shows that it is prohibited to move the toggle switch (gear, item and frequency switch), wait until the prohibition sign disappears before operating.

    1.9 When outputting large current (above 10A), it is recommended to use it for no more than 30 minutes.

    1.10 When calibrating active instruments, special care should be taken to avoid inputting voltage or current signals from the output terminal of the calibrator.

    1.11 When plugging or unplugging the regulator connector, do not pull the cable to avoid interruption of the signal line.

    1.12 Do not operate without load when testing current; please avoid short circuit when testing voltage. Do not turn off the machine when voltage and current are being output.

    1.13 After shutting down, please wait 5 minutes before restarting.


    2. Overview

    The DO30-3 multifunctional calibrator (hereinafter referred to as the calibrator) has a six-digit LCD screen to digitally display output value, error of the meter under inspection, output percentage, full scale value of the meter under inspection, step value, frequency and other parameters. AC and DC voltage and current calibration sources. There is also a 22-level standard resistor set to facilitate calibration of multimeter resistance levels. Equipped with RS232 interface to realize automatic data processing function.

    The calibrator adopts digital closed-loop control technology and a large-screen LCD display. It combines window technology to design a screen display with regionalized display content. It adopts advanced new technologies for amplitude stabilization, power amplifier, and protection to achieve good stability, high precision, and wide range. , finely divided, safe and reliable; the amplitude adjustment can be selected by percentage adjustment or position adjustment to meet the different needs of fixed value output and continuous adjustment, making it more convenient and faster to use.

    It is suitable for calibrating and calibrating four-and-a-half-digit three-meters, various current and voltage meters below level 0.2, and multi-meters with corresponding accuracy levels. It can also be used as a high-stability test power supply, used in conjunction with high-grade standard tables, to calibrate current and voltmeters above level 0.1.

    It is widely used in quality inspection, measurement and instrument maintenance in electric power, measurement, railway, industrial and mining enterprises, scientific research institutes and other units. It is an ideal standard tool.


    3. Features

    It has voltage, current and resistance output, good stability and strong load capacity.
    AC and DC voltage output range: 0~200mV~1V~2V~5V~10V~20V~50V~100V~200V~500V~1000V.
    AC and DC current output range: 0~100uA~500uA~2mA~10mA~20mA~100mA~200mA~1A~2A~5A~50A, the maximum current output is 55A.
    The voltage and current ranges are reasonably designed, and extended ranges are available. The range can be expanded through the full-scale key M on the regulator to meet the needs of various range detection of the meter under test to the greatest extent.
    It adopts 240×128 large-screen display and has a good human-machine interface. Displays the actual output value, percentage, gear, range, the measured value error rA and reference error rm, the full scale value of the tested meter, frequency, step value, etc.
    Use percentage to adjust the output. The percentage control amount is divided into 100%/N, 10%/N, 1%/N, 0.1%/N, 0.01%/N (step: N = 4, 5, 6, 10, 15).
    The output is adjusted by bit. The cursor is under the six-digit output value. Press the left and right arrows to move the cursor. Press the up and down arrows to increase or decrease the value pointed by the cursor to adjust the output size of the calibrator.
    There are five AC frequencies available for selection: mains synchronous, 50Hz, 60Hz, 400Hz, and 1000Hz. The 50Hz output can be synchronized with mains power to reduce the impact of the beat frequency of the meter under inspection.
    Output overload active protection, manual reset.
    It has a unique protection circuit and perfect self-protection function to reduce the harm caused by misuse to the standard meter and the tested meter.
    It has a clamp meter detection function, and the output display is synchronized with the clamp meter indication, making the operation very convenient. Equipped with our company's HT1000A clamp meter calibration coil (optional), it can measure 0~1000A current.
    It can be connected to a PC through the RS-232 interface to perform functions such as calibration data processing and file management. (optional parts)

    Keywords:
    • 输出
    • 电流
    • 电压
    • 校准
    • 测试
    • 量程
    • 调节
    • 显示
    • 使用