Phase Rings Centering (Models -Ph); Troubleshooting - VWR VisiScope 384 Serie Manual De Instrucciones

Phase rings centering (models -PH)

For models equipped with phase contrast set, you have to perform the centering of the phase rings.
Remove an eyepiece from the head and insert the centering telescope in the empty tube.
Insert the 10x objective rotating the nosepiece.
Rotate the turret of the condenser until you reach the inscription "10".
Loosening the lock screw of the centering telescope, focus on the light ring that you observe.
Rotate the two centering screws in order to move the bright ring until it is perfectly aligned with the dark ring.
Repeat for the other objectives (only as a verification of the correct centering).
Phase rings will be centered when you see an image like this:

Troubleshooting

Review the information in the table below to troubleshoot operating problems.
PROBLEM
LIGHT DOESN'T TURN ON
IMAGE CANNOT BE SEEN OR
IS DARK.
IMAGE IS UNCLEAR, BLURRED
OR HAS INSUFFICIENT CON-
TRAST.
CAUSE
Power supply not connected Check that the 6Vdc power supply
The iris diaphragm aperture
is not completely opened
Brightness level is low
Objective is not aligned with
the optical axis
Objectives or filters are dirty
The iris diaphragm aperture
is not opened correctly
Condenser at wrong height
9
SOLUTION
jack is well inserted on the rear of the
microscope
Rotate the brightness adjustment con-
trol and check if there is an increase in
the light output
Completely open the iris diaphragm
aperture
Rotate the brightness adjustment po-
tentiometer
Rotate the nosepiece until an objective
is well inserted in the optical path (it
"clicks")
Wipe them clean
Open the iris diaphragm aperture
completely
Rotate the condenser knob until you
see a uniform illumination