The Triplett PCAL200-NIST DC Voltage and Current Source is a device that provides an adjustable 0-20mA/4-20mA span with % readout and a 0 to 10V DC voltage range with 0.05% accuracy that can be used for benchtop and field industrial process device testing and calibration. This unit comes with a certificate of traceability to NIST that proves this unit matches the standards established by NIST. This unit features an automatic sawtooth or triangular output current step function, on-screen low battery indication, auto power off, and a built-in flashlight. This unit can be used in a wide range of applications such as calibration labs, LED and lighting testing, educational laboratories, and more.