Unmatched Precision, Unrivalled Performance The XDL series represents the ‘next generation’ of laboratory power supplies offering an unparalleled level of precision. Voltage and current are controlled using 16 bit DACs enabling voltages to be set to 1mV resolution even at full output. Indeed, the accuracy is sufficient for the PSU to be used as a calibration source for most hand-held DMMs. The XDL series uses pure linear technology and offers unrivalled performance in terms of regulation, output noise and dynamics. Line and load regulation are at the limit of measurement (nominally 0·002%). Output noise is less than 500μV rms. Recovery time from transient current pulses is better than 50μs. The XDL series provides full remote sense capability via dedicated sense terminals. Remote sense is essential to maintain precise regulation at the load (two 0·03Ω connection leads will drop 300mV at 5 Amps). When remote sense is not required, internal local sensing can be selected at the touch of a button. Multiple Ranges for Greater Flexibility The XDL series provides multiple ranges for increased current capability at lower voltages. The main range offers 0 to 35 Volts at up to 3 Amps (XDL 35-5) or 0-56V at up to 2 Amps (XDL 56-4). The higher current range provides up to 5 Amps for voltages up to 15V (XDL 35-5) or 4 Amps for voltages up to 25V (XDL 56-4). A further low current range provides enhanced current setting and measurement resolution of 0·1mA. The product of voltage and current can be displayed at any time by pressing the VxA button. The power is displayed to a resolution of 0·01 Watts. Fast, Simple and Safe to use The user interface of the XDL series has been carefully designed to provide rapid control whilst guarding against any possibility of error. Voltage and current setting can be performed either by direct numeric entry or, for applications where the voltage or current must be gradually changed, by using the quasi-analogue Jog control. To enable the current limit to be set before connecting the load, the limit setting is displayed when the output is off. Pressing the View Limits key at any time provides a temporary display of the limit values allowing precise adjustment to also be made with the output on. Setting Memories for Added Convenience The XDL series provided storage of up to 10 power supply sets-ups in non-volatile memory. Upon mains switch-off, the set-up of the PSU is saved and is automatically restored at switch-on. OVP and OCP Trips with 'Alarm' Output The XDL series provides fully adjustable over-voltage and over-current trips which can be used both as a fail-safe against accidental missetting and as a protection against inappropriate load conditions. In addition to turning the output off, a trip condition switches the rear panel alarm signal enabling other equipment to be controlled. For complete protection of the power supply, the trip will also be operated by over-temperature or excess voltage on the sense terminals.