I. Usage, Features:
Multi-functional CalibratorHG30-3B (hereinafter referred to as the Standard Source) isHuaguang High-TechOur company's newly designed model features a large-screen LCD (192×64) backlit Chinese character display, with an excellent human-machine interface and high-precision, large current output for intelligent AC and DC standard voltage and current.Median ResistanceStandard source, calibration instrument (with AC output displayed as true RMS). The instrument features various Chinese character prompt functions, allowing simultaneous and on-screen display of the actual output value, percentage, and the full scale value of the measured gauge.RangeFrequency, step value, grid count, etc. The instrument's output can be set according to the full scale value of the inspected gauge.RangeAnd the step size can be selected according to the scale of the inspected gauge. Output adjustment options are available.Keyboard(Digital) Control or Potentiometer Control. Features digital display, error direct reading,RangeWide range, fine gradation, high precision, good stability, and easy to use. Suitable for calibration, inspection, and maintenance of 4.5-digit multi-meters, various pointer-type AC/DC voltmeters and ammeters with 0.2 and 0.5 classes or below; also serves as a high-stability test power source, compatible with high-grade standard meters for calibrating 0.1-class current and voltage meters.
II. Main Features:
1. 5 1/2-digit LCD digital display with simultaneous output in both actual value and percentage formats.
2. UtilizeKeyboardRegulate the increase and decrease of output volume.KeyboardControl quantities are divided into 100%/N, 10%/N, 1%/N, and 0.1%/N (where N is 4, 5, 6, 10, or 15).
3 、External Control RegulatorThe controller allows for off-line adjustment of output quantity increments.KeyboardWith both button-activated sound and potentiometer configurations, switchable at will.
4. Output voltage range for AC and DC is 0 to 1050V.
5. AC and DC current output range: 0 to 22A.
6. Offers four output frequencies: 50Hz, 60Hz (59.7Hz), 400Hz, and 1000Hz, for useCrystal OscillatorEnsure accuracy and stability of frequency.
7. Overload protection with automatic shutdown, screen display in Chinese characters, and audio alert for protection status; manual reset required.
8. The 50Hz output can also be synchronized with the municipal power supply to minimize the impact of the beat frequency on the meter being tested.
9. Clamp Meter Measurement: Equipped with the HG1000A standard coil for this instrument, it can measure 0-1000A current with an accuracy of ±0.3%.
III. Technical Performance:
1. Stability: AC < fullRange0.02%/5 minutes
DC < FullRange0.01%/5 minutes
The instrument requires a two-hour warm-up for precise measurements.
2. Communication Distortion: <0.5%
3. Direct Current Ripple Factor: <0.05% (at rated output)
4. Output Frequency Accuracy: 50Hz, 60Hz (59.7Hz), 400Hz, <0.1% (or sync with mains power)
5. Output voltage and currentMedian ResistanceScope and accuracy are as shown in (Appendix 1)      (23℃±2℃, output value greater than 10%)Range）

Appendix (1)
6. Power specifications: AC voltage 220V ±10%, frequency 50Hz ±1Hz
7. Working Environment: Temperature 5℃ to 35℃, relative humidity <80%
8. Office Hours: Continuous
9. Dimensions: 180×480×480mm³
10. Weight: Approximately 24 kg