533. Whilst wearing cotton gloves remove thedefective tungsten lamp and replace with anew one.4. Switch on the power and move the SwitchMirror down into the position shown in thepicture opposite. Observing the entrancewindow on the instrument’s monochromator,adjust the tungsten lamp until the light iscentred on the entrance hole.5. Disconnect the power and re-attach the lampcompartment cover and the top case of thespectrophotometer.12.2.2 Deuterium Lamp Replacement1. Unscrew the 4 screws on thespectrophotometer’s top case (see 12.2.1)and remove the cover of thespectrophotometer.2. Unscrew the 2 screws on the top of the lampchamber and remove the cover. (see 12.2.1)3. Unscrew the 2 screws on the deuterium lampflange (No.1), unplug the connector on thepower board (No. 2) and remove thedeuterium lamp. Whilst wearing cotton glovesreplace with a new deuterium lamp. Re-fix the2 screws and reconnect the power cable.4. Re-attach the lamp compartment cover andthe top case of the spectrophotometer.D2 LampTungstenLampSwitchMirrorEntrance WindowEntranceHole
