7
3.3.3
Working distance varies from 301mm (when using a 0.3X objective lens) to 38.6mm (when a 2X
objective lens is used). Normal working distance for standard configuration (1X objective lens) is
110mm.
3.4 Changing the Bulb
3.4.1
Before changing the light bulb, make sure that the power is switched off and the power cord has
been disconnected from the main power supply.
3.4.2
For incident light, unscrew the lamp collector piece, remove the old halogen bulb (when a
R2GG halogen stand used) or the old LED module (when a R2LED stand used) from the socket
and carefully plug in the new halogen bulb or LED module. Screw the collector piece back in
after changing the old one.
3.4.3
For transmitted light, turn the microscope over so that the bottom plate of the stand faces
towards the user. Remove the bottom plate by unscrewing the four rubber feet. For R2GG
halogen stand, remove the old light bulb from the socket and carefully plug the new light bulb in;
for R2LED stand, unscrew the plank and remove the old LED module and screw the new LED
module in place. Finally, firmly secure the bottom plate after changing the light bulb or LED
module.
3.4.4
Never touch the glass surface of the light bulb with bare hands. Any grease on the light bulb will
affect heat dissipation, greatly shortening the life span of the light bulb. If the surface of the bulb
has been accidentally touched, clean with alcohol and tissue.
