In today's industry, data transmitters and sensors typically use analog signals of 4 to 20 milliamperes (mA) current or voltage signals of 0 to 10 volts direct current (VDC) to transmit data to a central control system utilizing a PLC or microcontroller circuit. It is essential to test and calibrate measurement and control systems in order to evaluate system performance, identify error reasons early, and re-calibrate the signal. In order to generate a standard signal source for system testing and calibration, high-precision, multi-function analog voltage and current measurement equipment is employed. In this study, we present the design and manufacture of a voltage and current analog signal generator with multiple applications. The device can generate a current signal in the range of 4 to 20 milliamperes with a maximum error of 0.05% and a DC voltage signal in the range of 0 to 10 volts with a maximum error of 0.05% and ability to measure current signals between 0-20 mA and voltage signals between 0-10 V. The devices is designed on-site and operates using battery power. The finished product is investigated and validated in the laboratory, achieving the required standard with positive results