72 Mega-800 SCINCO
Fig. 9.4 The filament direction
If the performance of the instrument changes greatly after the replacement, the height of W lamp
should be adjusted (The horizontal position of W lamp is adjusted automatically when the self-testing
is done upon switching on the power.). First, remove the W lamp holder, loosen the setscrews on the
W lamp holder with a watch screwdriver and adjust the height of W lamp. The distance between the
center of the filament and the bottom should be 40mm according to the design requirements. But it
can be adjusted slightly. And then tighten the setscrews and insert the W lamp holder to the socket
Deuterium lamp replacement
The D2 lamp is plugged in the D2 lamp socket. When replacement is made, directly and securely
insert a new one into the socket. The procedures are shown as follows:
① Open the light source house.
② Remove the deuterium lamp.
Fig; 9.5 Remove the deuterium lamp
③ Clean the surface of D2 lamp with a clean cloth socked with alcohol. Insert the D2 lamp into
its socket. The bulge part of the deuterium lamp and the dent of the holder should be rightly
overlapped (the light beam window should face to the convergent mirror), as shown in Fig.
10.6.
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