DO30-3 AC/DC standard source

DO30-3 AC/DC standard source, multimeter calibrator, multifunctional calibrator
1、 Purpose and characteristics:
The DO30-3 AC/DC standard source is an intelligent AC/DC standard voltage and current calibrator (where the AC output is displayed as true RMS). The instrument is equipped with three display windows, which can simultaneously display the output actual value, percentage, and the full-scale value of the tested meter. The output range of the instrument can be set based on the full-scale value of the tested meter, and the corresponding step size can be selected according to the scale of the tested meter. Output adjustment can be controlled by keyboard (key) or potentiometer. It has the characteristics of digital display, error direct reading, wide range, fine grading, high accuracy, good stability, and easy use. Suitable for calibration, inspection, and maintenance of four and a half digit multimeters, as well as various pointer type AC and DC voltage and current meters at or below level 0.2 and 0.5; It can also be used as a high stability testing power supply, in conjunction with high-level standard meters, to calibrate 0.1 level current and voltage meters.
2、 Main functions:
1. 51/2-digit LED digital display output, displaying both actual value and percentage simultaneously.
2. Use keyboard to control the increase or decrease of output volume. The keyboard control quantity is divided into 100%/N, 10%/N, 1%/N, and 0.1%/N (N is 4, 5, 6, 10, 15).
3. The external control regulator can control the increase or decrease of output quantity off the machine, and there are two configurations on the regulator: keyboard and potentiometer, which can be converted freely.
4. The output range of AC and DC voltage is 0-1050V.
5. The output range of AC and DC current is 0-60A.
6. Communication provides four output frequencies: 50Hz, 60Hz (59.7Hz), 400Hz, and 1000Hz, using crystal oscillators to ensure frequency accuracy and stability.
8. Output overload can be automatically protected and manually reset.
8. AC 50Hz output can also choose mains synchronization to reduce the impact of the frequency of the tested meter.
9. Clamp meter measurement: equipped with our standard coil, it can measure current from 0 to 1000A with an error of ± 0.3%.
Appendix:

Output project output range rated output maximum output Accuracy AC/DC voltage 0～300mV 20mA 100mA Basic error: DC：±0.03% AC：±0.05% 1KHz additional error: ± 0.05% of the reading value Voltage additional error: ± 0.02mV ACI: Accuracy not assessed for ≤ 1mA 0～1V～3V 50mA 100mA 0～5V～10V～30V 100mA 200mA 0～50V～100V～300V 50mA 100mA 0～250V～500V～1000V DC:20mA AC:40mA DC:20mA AC:60mA AC/DC current 0～100mA DC:3V AC:36V 0～1A DC:3V AC:12V 0～50A 1.5V standardresistance 10. 24, 50, 100, 240, 500 (Ω), 1, 2.4, 5, 10, 24 (k Ω) plus x 1K, x 1 magnification range (10k Ω~24M Ω) 0.25W ±(0.3%+20mΩ) Note: (1) When the working environment temperature exceeds 23 ℃± 2 ℃, for every 10 ℃ change, the additional error is less than the basic error of the range (2) 50A 1KHz error is ± (0.15% of read value+0.05% of full scale)

3、 Technical performance:
1. Stability: AC<0.02%/5 minutes of full range, DC<0.01%/5 minutes of full range. The instrument needs to be preheated for two hours for precision measurement.
2. Communication distortion:<0.5%
3. DC ripple factor:<0.05% (at rated output)
4. Output frequency accuracy: 50Hz, 60Hz (59.7Hz), 400Hz, 1KHz ＜ 0.1% (or mains synchronous)
5. Output voltage, current, and median valueresistanceThe range and accuracy are shown in Appendix 1 (23 ℃± 2 ℃, output value greater than 10% range)