DO30- III AC/DC standard sourceDetailed product description：

The DO30-III digital AC/DC standard source uses a 51/2-digit LCD display for output, which can display various parameters such as gear, range, frequency, full-scale value, and step value on the same screen. Suitable for verifying and inspecting various current and voltage meters below level 0.2, with AC and DC voltages ranging from 0 to 1000V and AC/DC currents ranging from 0 to 50A. It is also equipped with eleven standard resistor combinations. The amplitude adjustment is controlled by a keyboard and can output a fixed value and quantity. Due to safety measures such as overload protection, the instrument not only has high accuracy, stability, reliability, and ease of use, but also operates more safely. Mainly used for verifying pointers or digital multimeters and meter heads of various corresponding accuracies, suitable for use in metrology and testing, instrument production and maintenance, and quality inspection departments. If you choose the standard coil of the clamp meter, you can verify the AC/DC clamp meter.

Main technical performance parameters

This instrument is suitable for ambient temperatures ranging from 0 ℃ to+40 ℃; Working in an environment with a relative humidity below 80%, using AC 220V ± 10% power supply, power frequency 50Hz ± 5%, and maximum power consumption not exceeding 230W.
The output range and accuracy are shown in the table
The waveform distortion shall not exceed 0.5%
Ripple factor not exceeding 0.05%
Frequency accuracy ± 0.1%
Stability: AC less than 0.02% of full scale/5 minutes
DC less than 0.01% of full scale/5 minutes
Dimensions: w × d × h 576 × 480 × 220 (mm)
Weight: 24kg

Technical Parameters Table of DO30- Ⅲ AC/DC Standard Source

Output project	output range	rated output	Maximum Output	Accuracy
AC and DC voltage	0～75mV～100mV～200mV～300mV	20mA	100mA	Basic error: DC：±0.02% AC：±0.05% 1KHz additional error: ± 0.05% of the reading value Voltage additional error: ±0.02mV ACI:≤1mA Not assessing accuracy
	0～1V～2.5V～5V	50mA	100mA
	0～10V～25V～50V	100mA	200mA
	0～100V～250V～300V	50mA	100mA
	0～500V～1000V	DC:20mA AC:40mA	DC:20mA AC:60mA
AC and DC currents	0~100μA～500μA ～2.5mA～10mA～25mA ～100mA～250mA		DC:3V AC:36V
	0～1A～2.5A～10A		DC:3V AC:12V
	0～50A		1.5V
standard resistor	10. 24, 50, 100, 240, 500 (Ω), 1, 2.4, 5, 10, 24 (k Ω) plus x 1K, x 1 magnification range (10 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)