The 68938 Power Supply is a reliable and economical DC power supply. It provides highly regulated constant current to a Quartz Tungsten Halogen (QTH) lamp or infrared (IR) emitter rated up to 140W. Light ripple of less than 0.4% rms is achievable when using this power supply with Oriel lamps, housings and rod mounts. A precision output control knob allows current adjustments to be made from 0 to 12 amps. The knob features a locking collar, eliminating the need to readjust the current once the desired set point is reached.

When turning on the light source, its soft-start feature ramps up the current gradually to prevent damage and prolong the life of a QTH lamp. The 68938 includes a safety interlock which disables the light source if encountering situations such as an open lamp housing, over temperature condition or incomplete electrical connection. The lamp or emitter voltage may be monitored using a simple pushbutton switch. This easy-to-operate power supply provides solid performance for many common applications. For a full-featured power supply, order model 69931.

68938直流电源是一种可靠、经济的直流电源。它提供高调节恒流石英钨卤素(QTH)灯或红外(IR)发射器额定140W。当使用这种带有腔灯、外壳和棒座的电源时，光纹波小于0.4% rms是可以实现的。一个精确的输出控制旋钮允许电流调整从0到12安培。这个旋钮的特点是有一个锁环，这样在达到预期的设置点后就不需要重新调整电流了。当打开光源时，它的软启动功能逐渐增加电流，以防止损坏和延长QTH灯的寿命。68938包括一个安全联锁，如果遇到情况，如开灯外壳，温度过高条件或不完整的电气连接，该联锁将关闭光源。可以使用一个简单的按钮开关来监视灯或发射极电压。这种易于操作的电源为许多常见应用程序提供了可靠的性能。对于功能齐全的电源，订购型号69931。