INDEX
IMPORTANT NOTES
Congratulations on your purchase of this high quality BARSKA 
microscope. With proper care, this microscope will provide many 
years of use. Please read the following instruction s before 
operating this instrument.
1. Do not attempt to disassemble the instrument. This product has  
    been carefully assembled at the factory and should only be     
    examined by a factory-trained technician.  
2. This instrument should only be used in an environment with an  
    indoor temperature range of 32oF to 104oF.
3. Do not use this instrument in an environment with a lot of dust.
    Cover the instrument when not in use.
4. Do not subject the instrument to shock.
Maintenance............................................
Model AY11240/Model AY11238..................
Model AY11228/Model AY11232..................
Model AY11230/Model AY11234..................
Model AY11236........................................
Warranty Information................................
1
2-5
6-9
10-13
14-18
Back Cover
1
MAINTENANCE
Proper care and storage of this instrument is essential. Please read 
the following guidelines:
1. Keep the instrument in a dry and moisture-free location.
2. Do not expose to acid, alkali fumes or moisture.
3. Keep optical parts clean and free of dust. To clean optical parts  
    gently wipe with lens cleaning tissue and a mixture of alcohol  
    and diethyl ether. Depending on weather conditions, the   
    following are the recommended mixture ratios:
    Wet weather: 1:2
    Dry Weather: 1:1
4. After use, cover the instrument with the plastic dust cover.
5. If instrument is to be stored for an extended period of time,   
   remove the eyepiece and oculars and store in a moisture-proof  
   container.
MODEL AY11240/AY11238
2
MICROSCOPE USAGE
BARSKA Model AY11240 and Model AY11238 are designed for 
biological studies such as specimen examination. They can also   
be used for examining bacteria and for general clinical and medical 
studies. Simple design and use is especially useful for school 
classroom instruction.
CONSTRUCTION
BARSKA Model AY11240 is a fixed tube type. For comfortable 
observation, the arm can be easily tilted at any angle from 90o 
vertical to 45o level. It is also equipped with a coarse adjustment 
and fine adjustment as well as a space limiter to protect the 
objective from contacting and damaging the specimen. BARSKA 
Model AY11238 features a monocular tube that is slanted at a 45o 
angle. The head rotates 360o. The Eyepiece Set Screw prevents 
the eyepiece from falling out of the tube.
Coarse 
Adjustment
Knob
Fine 
Adjustment
Knob
Stand
5-Hole
Diaphragm
and CondenserConcave
Mirror
Stage
Spring Clips
Objectives
Barrel
Revolving Turret
Eyepiece
Coarse 
Adjustment
Knob
Fine 
Adjustment
Knob
Stand
5-Hole
Diaphragm
and Condenser
Lamp 
On/Off
Switch
Lamp 
Power
Cord
Stage
Spring 
Clips
Objectives
Rotating Head
Revolving 
Turret
Eyepiece
Stage Height
Limit Adjustment
Monocular Tube
Eyepiece 
Set Screw
Model AY11240 Model AY11238