I. Usage, Features:
The DO30B-2 Multi-functional Calibration Instrument is suitable for verifying various current and voltage meters below 0.2 class. It can also be used as a high-stability test power supply, paired with high-grade standard meters, to calibrate current and voltage meters above 0.2 class.
II. Main Functions:
1. 5 1/2-digit LED digital display for output quantity, available in both actual value and percentage display modes.
2. Output current range for AC and DC: 0 ~ 100uA ~ 500uA ~ 2mA ~ 5mA ~ 20mA ~ 50mA ~ 200mA ~ 500mA ~ 2A ~ 5A ~ 20A.
3. AC and DC voltage output range: 0~200mV~1V~2V~5V~10V~20V~50V~100V~200V~500V~1000V.
4. Available frequencies for selection include three options: 50Hz, 60Hz, 400Hz
5. Overload protection with automatic shutdown and manual reset.
Each voltage and current rating can handle an overload of 20%.
7. Clamping Meter Measurement: Equipped with standard coils from our factory, capable of measuring AC 0～750A (some models can measure up to over 1000A); DC 0～1000A with an error of ±0.3%.
Appendix:
| Export Items | Output Range | Rated Output | Peak Output | Accuracy |
| AC/DC Voltage | 0～200mV | 10mA | 30mA | DC: ±(0.02% of reading + 0.03% of full scale) AC: ±(0.03% of reading + 0.05% of full scale) |
| 0～2V | 20mA | 60mA | ||
| 0～5V～10V～20V | 40mA | 100mA | ||
| 0～200V～500V | 20mA | 60mA | ||
| 0～1000V | 10mA | 30mA | ||
| AC and DC Current | 0～100uA～500uA ～2mA～5mA ～20mA～50mA | DC：3V AC：36V | DC: ±(0.02% of reading + 0.05% of full scale) | |
| 0～200mA ～500mA | DC：3V AC：12V | |||
| 0～2A～5A～20A | 2V | |||
| Standard Resistor | 20, 24, 50, 100, 240, 500 (Ω) | 1, 2.4, 5, 10, 24 (KΩ) | Plus ×1K, ×1 Range Positions (i.e., 10KΩ ~ 24MΩ) | 0.25W | ±0.3%+20mΩ |
III. Technical Performance:
1. Stability: DC < FullRange0.01% per 2 minutes, AC < fullRange0.03% per 2 minutes
2. Communication distortion: <0.5%
3. Direct Current Ripple Factor: <0.1%
4. Output Frequency and Accuracy: 50Hz/60Hz/400Hz < 1%
5. Output voltage, current range, and accuracy (at 23℃±2℃, output values greater than 10%)Range）
6. Power Consumption: AC voltage 220V ±10%, frequency 50Hz ±1Hz; power consumption < 180VA
7. Working Environment: Temperature 5℃ to 35℃, relative humidity not exceeding 80%
8. Business Hours: Continuous
9. Dimensions: 135×480×420mm³
Weight: Approximately 16 kg
