DO3003 DC standard signal source, thermal instrument calibrator

1 Overview
DO3003 DC standard signal source is a desktop calibration instrument designed for high-precision and multifunctional standards. It adopts a high brightness backlit large screen display, with simple operation, high accuracy, and integrated output and detection design, making it an ideal work for process control instruments. Widely used in industrial and mining enterprises, scientific research institutions, colleges and universities, military industry, metrology and other departments.

2. Technical features
2.1 DO3003 DC standard signal source can provide multiple standard signals and has an intelligent instrument calibration system. It can excellently measure DC voltage, current, resistance, and transmitter signals, and provide DC voltage, current, resistance, and analog transmitter signal outputs. It can calibrate various data collectors, recorders, multimeters, and other industrial instruments. 2.2 Measurement and output are completely isolated, do not interfere with each other, and can be performed simultaneously.
2.3 Measure and output signals such as DC voltage, current, 3-wire resistance, and 4-wire resistance.
2.4 Six digit display, using 240X160 high brightness dot matrix graphic LCD display, with simple and clear operation buttons and screen display.
2.5 The instrument has high linearity, and when calibrating the instrument, each option for measurement and output has 2 calibration points, without the need for linear correction.
2.6 Measurement and output are both set digitally for easy operation, and programming and step output make work easier.
2.7 Real time environmental temperature and battery level display. Built in rechargeable battery with battery protection circuit, no need to worry about battery overcharging (24-hour AC power supply).
2.8 Adopting seamless AC/DC connection technology, there is sufficient accuracy guarantee during AC/DC switching, ensuring easy use of the instrument at any time.
2.9 Equipped with RS232 connection.

3. Technical indicators
3.1. Technical indicators for measurement functions

type	range	accuracy	resolution
voltage	0～±200mV	0.01％R.D＋0.005％F.S	1uV
	0～±30V	0.01％R.D＋0.005％F.S	0.1mV
electric current	0～±30mA	0.01％R.D＋0.005％F.S	0.1uA
Resistive 3-wire	0～400Ω	0.02％R.D＋0.005％F.S	1mΩ
Resistance 4-wire	0～400Ω	0.015％R.D＋0.005％F.S	1mΩ

3.2. Output Function Technical Indicators

type	range	accuracy	resolution
voltage	0～+100mV	0.02％R.D＋0.005％F.S	1uV
	0～+10V	0.02％R.D＋0.005％F.S	0.1mV
electric current	0～+25mA	0.02％R.D＋0.005％F.S	0.1uV
resistance	0～400Ω	0.01％R.D＋0.005％F.S	1mΩ

3.3. Display: 240X160 dot matrix graphic LCD.
3.4. Battery continuous working time: more than 5 hours. Power off charging time: 7-8 hours.
3.5. Reference working environment: Temperature: 23 ℃± 1 ℃ Relative humidity: (45-75) ℅. Normal working environment: Temperature: 23 ℃± 10 ℃ Relative humidity: (20-80) ℅. Storage environment: Temperature: -20 ℃~55 ℃ Relative humidity: ≤ 90%.
3.6. Power supply: AC 220V/50Hz ± 20V, internal rechargeable battery 3 x 2400mAH lithium battery size: 310 x 305 x 160 mm (length x width x height). Weight: 2.5Kg.