www.microscopenet.com17Note: When using the 40X objective, you won’t need to apply oil drop on the oil condenser. When using the 100X objective, the condenser won’t work well if no oil drop appliedon the condenser. When you apply the immersion oil with the 100X objective, do not let the immersionoil to contact with the dry objective lenses (especially the 40X). If the immersion oilis on the dry objectives lens, please use the lens cleaning paper to clean theobjectives lens in time. The oil will damage the dry objective lenses. After observing the specimen with the 100X objective, clean the 100X objective lensfirst.8. Phase Contrast Kit Installation and OperationInstructions8.1 Phase contrast kit of A1PHIP:1) Mounting the phase contrast objectivesa. Take off all the objectives from the nosepiece.b. Install the phase contrast objectives onto the nosepiece following the steps in 2.4.2) Mounting the phase contrast condenser/annular ring diska. Rotate the nosepiece and set the 10X objective in position.b. Turn the coarse focus knob to raise the mechanical stage to the highest positionwithout contacting the 10X objective.c. Turn the condenser control knob to lower the condenser to the lowest position.d. Loosen the condenser lock thumb screw and remove the brightfield condenser asshown in Fig. 15 (a).e. Insert the condenser/annular ring disk into the condenser holder, and tighten thethumb screw as shown in Fig. 15 (c).f. Re-adjust the condenser height to its normal position.g. Re-adjust the mechanical stage height to its normal position.Condenser HolderFig.15Condenser Lock Thumb ScrewCondenser Centering Screws(a) (b) (c)