AIM & THURLBY THANDAR INSTRUMENTS PLH & PLH-P Series PLH Series - 120V & 250V linear regulated laboratory power supplies true analog controls with digital functionality PLH-P Series - full remote control for bench & system applications analog, RS-232, USB, LAN (LXI) or GPIB interfaces aimtti.com aimtti.co.uk aimtti.usPLH series - 120V & 250V linear regulated laboratory power supplies PLH Series higher voltages without lower performance Higher voltage power supplies from Europes leading manufacturer The PLH series is a development of the TTi has been at the forefront of laboratory power supply design for best-selling New PL series of laboratory around thirty years during which it has re-defined the state-of-the-art for bench power supplies which is available switch mode products with its innovative Mixed-mode and PowerFlex in 15V, 30V and 60V variants (covered in a regulator designs. separate brochure and on our web site). Demand for linear regulated PSUs has remained strong and continuing The PLH series retains the ultra compact development of linear models has generated the lower cost ELR series, format, high power density, and smart and the advanced QL series in addition to the ever popular PL series. analog controls of the PL series but offers The PLH and PLH-P series of linear regulated higher voltage dc power voltages up to 250V to cover applications supplies joins a large family of PSUs with power levels from 15 watts up beyond the capabilities of standard bench to 1200 watts. PSUs and into areas such as magnetics. See our web site for full details. Analog controls with digital stability As technology has changed, many products have moved from analog The main disadvantage of analog controls is stability and security. The controls to digital ones. Although digital controls suit many instruments, settings of analog potentiometers can drift over time. More importantly, they do not necessarily suit a bench power supply. the settings can be changed accidentally with potentially serious consequences. Customer research shows that many users prefer the speed and simplicity of conventional analog controls for setting voltage and current. The PLH series incorporates S-Lock. One press of the Lock button Digital controls may offer greater precision, but often at the expense of transfers control of voltage and current from the analog controls to ease-of-use. internal digital circuitry. With this in mind, the PLH series has retained the true analog controls of This offers not just complete security, but exceptional stability as well its best-selling sister products, the PL series. with each setting controlled by an instrumentation quality DAC. Lock your settings at the touch of Linear regulation for best performance a button Linear regulation still offers the lowest output noise and the best transient response (recovery time from a sudden current step). Despite the high output voltages, the PLH series maintains output noise figures of below 2mV, and transient recovery times of better than 250s. In addition, the lack of a high frequency switching circuit reduces radiated noise and common mode signals enabling the PLH series to be used in sensitive environments. Choose a voltage range that suits your task When working with any particular piece of equipment, engineers often require a voltage source variable over only a narrow range. Set the voltage too high and damage might occur, set it too low and the circuit may reset. Thats where the V-Span function of the PLH series comes in. It allows the user to redefine the end-stop values of the voltage control to define a specific voltage range. For example: An engineer is working on a circuit that will eventually operate from a peak rectified 110V rms 5% supply. They use V-Span to set a Vmax of 164 volts (to prevent over-voltage damage) and a Vmin of 147 volts (to ensure that the circuit doesnt reset). They now have a power supply which provides high resolution analog control over the exact voltage range they need. Vmin and Vmax can be set anywhere between zero and maximum output voltage subject only to Vmax > (Vmin + 1V). The fine control gives additional adjustment of 1%. Once set, the voltage span function can be turned on or off at the press of a button*.