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 16

6

Troubleshooting Guide   

1. Optical system 

TROUBLE CAUSE 

SOLUTION 

 

The edge of the 
field of view is dark 
or the brightness is 
not uniform 

The nosepiece is not in the located position (objective and 
light path not coaxial) 

Locate the nosepiece 
properly where it clicks 

The image of filament is not centered 

Center the filament 

A lens (the objective, condenser, eyepiece or collector) is 
dirty. 

Clean it thoroughly 

 
Find dust and stain 
in the field of view 

There are stains on the lens

including condenser, 

objective, eyepiece and collector

 

Clean it up 

There are stains on the specimen 

Clean it up 

The position of the condenser is too low 

Loosen the condenser’s 
locking bolt, adjust the 
condenser to the right 
position 

 
 
 
 
 
 
The image is 
defocused ( low 
resolution \ 
contrast) 

There is no cover slip on the specimen 

Add coverslip 

The cover slip is too thick or too thin 

Use the standard 
coverslip ( 0.17mm ) 

The specimen is placed inversely 

Reversal it back 

There was oil on the dry objective(easily happened in 
40X objective) 

Clean it up 

There are stains on the lens

including condenser, 

objective, eyepiece and collector

 

Clean it up 

didn’t use oil for the oil objective 

Use immerse oil 

There was bleb in the oil 

Eliminate the bleb 

Use a unsuitable oil 

Change to the specified 
one 

The size of the aperture diaphragm is too big 

Minify it 

There are stains on the incident lens of the binocular tube

Clean it up 

The size of the aperture diaphragm is too small 

Open it up 

The position of the condenser is too low 

Adjust the position 

 
 
One side of the 
image is dark 
 

The condenser is not in the center of the field of view\the 
condenser inclines 

Install the condenser 
again and adjust the 
center carefully by 
centering the bolt   

The nosepiece is not in the right position 

Turning it until it reach 
the “clicked” position 

The specimen is floating 

Fix it 

 

The specimen slips on the stage 

Fix it 

Summary of Contents for STM-2030BD

Page 1: ...gital biological microscope To insure safety and obtain optimum performance and familiarize yourself fully with the use of this microscope We recommend that you read the manual thoroughly before opera...

Page 2: ...er Notice 2 1 Components 4 2 Assembly 5 2 1 Assembly Diagram 5 2 2 Assembly Steps 6 3 Adjustment Operation 10 3 1 Adjustment Sets 10 3 2 Operation 11 4 Specification Table 14 5 Outfit 15 6 Troubleshoo...

Page 3: ...it will bring a serious damage to the instrument 8 Use the factory supplied power cord please II Maintenance 1 All the lenses have been well checked and adjusted It is forbidden to disassemble them y...

Page 4: ...re 8 Do not disassemble any parts of the microscope which will affect the function or decline the performance of the microscope 9 Place the instrument in a cool dry position When not using the microsc...

Page 5: ...4 1 Components STM 2030BD Digital Biological Microscope Eyepiece Digital viewing head Nosepiece Objectives Main body Condenser Collector Stage Ruler...

Page 6: ...s The number in the figure shows the assembly steps Before installing be sure every components is clean do not score any parts or glass surface Keep well with hexagon wrench provided When replacing th...

Page 7: ...ieces into the eyepiece tube until they are against each other as shown in Fig 4 Fig 4 Fig 3 NOTE Operation Conditions 1 Temperature 0 40 Maximum Relative Humidity 85 2 High Temperature High Temperatu...

Page 8: ...Clean the objective regularly for lens is susceptible to dust When operating use 10 magnification objective to search and focus specimen firstly then replace with higher magnification objective if ne...

Page 9: ...Plug the power cord into the power supply receptacle safely Make sure the connection is well Do use the supplied power cord all the time If lost or damaged select the same standard cord please 2 2 6...

Page 10: ...halogen Lamp 6V20W Replace the lamp as follows if necessary 1 Please set the main switch to O off state before replacing and make sure the bulb the lamp room and periphery are all cool enough to carry...

Page 11: ...15 Right Coarse Focus Knob Right Fine Focus Knob Tension Adjustment Collar Fig 14 Condenser Adjustment Knob Longitudinal Adjustment Knob Transversal Adjustment Knob Locking Set Left Fine Focus Knob Le...

Page 12: ...f you finish the observation with the short working distance objective and want to change another one be careful of not letting the objective touch the specimen 3 3 3 Focusing the specimen 18 19 1 Foc...

Page 13: ...r has been adjusted too It also needn t any user s operation 3 3 5 Aperture Iris Diaphragm Adjustment Fig 20 21 Turn the aperture iris diaphragm lever to adjust the aperture iris diaphragm Generally s...

Page 14: ...3 3 6 Adjusting the Interpupillary Distance Fig 22 The interpupillary distance range 55mm 75mm While looking through the eyepieces move both sliders to adjust interpupillary distance until the left an...

Page 15: ...oving Range 30mm Fine Division 0 004mm Condenser Abbe Condenser NA 1 2 Stage Double Layers Mechanical Stage 140mm 140mm Moving Range 74 50mm Illumination 6V20W Halogen Lamp 4 2 Eyepieces and Objective...

Page 16: ...nal Condenser Abbe Condenser NA 1 2 1 Optional Nosepiece Quadruple 1 Optional Illumination 6V20W Halogen Lamp 1 Optional Spare lamp 6V20W Halogen lamp 2 Optional Spare fuse 2A 2 Optional Eyepieces 10...

Page 17: ...oo thick or too thin Use the standard coverslip 0 17mm The specimen is placed inversely Reversal it back There was oil on the dry objective easily happened in 40X objective Clean it up There are stain...

Page 18: ...er magnification The specimen is placed inversely The coverslip is too thick Turn inversely Use the standard coverslip 0 17 mm The specimen is not easy to move The specimen holder is not fixed Fix it...

Page 19: ...18 The bulb flickers or the brightness is vertiginous The bulb is going to burn out Replace it The bulb is not entirely inserted into the holder Check and insert it again...

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