MultiRAE User’s Guide19Next, put the plug from the power supply into the jack on the side of the Desktop Cradle:Plug the other end of the charger into a power source.Automatic PID Lamp CleaningWhen a MultiRAE equipped with a PID (photoionization detector) is placed in the Desktop Cradle, itsPID is automatically cleaned. During the first four hours of charging, continuous lamp auto-cleaning isperformed. After that, cleaning stops. The battery continues to be charged, if necessary.5.2 Charging With The Travel ChargerThe Travel Charger is a lightweight portable alternative to the Desktop Cradle for charging and PCcommunications. Follow these steps to use the Travel Charger.Before attaching the Travel Charger, check that it is aligned correctly with the base of the MultiRAE.There are two alignment pins on one side and one alignment pin on the other side, designed to mate withmatching points on the bottom of the MultiRAE:1. Check bottom of MultiRAETravel Charger’s alignment pinsfor correct orientation with theMultiRAE.2. Align Travel Charger withbottom of MultiRAE.3. Press Travel Charger ontobottom of MultiRAE.4. Make sure the Travel Chargerclicks into place and attachesfirmly.