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Omegon nabla III Series User Manual

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User Manual
Omegon® -III Nabla III Microscopes
English Version 05_2024 Rev. A Art.-Nr. 82928/82929
The complete or partial reproduction of the contents of this document outside of private use is expressly prohibited in any form. Subject to changes and errors. All texts,
images and symbols are property of NIMAX GmbH
Manual_82928_EN_REV_A
1 / 19

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  • Page 1 User Manual Omegon® -III Nabla III Microscopes English Version 05_2024 Rev. A Art.-Nr. 82928/82929 The complete or partial reproduction of the contents of this document outside of private use is expressly prohibited in any form. Subject to changes and errors. All texts,...
  • Page 2 Omegon® -III Nabla III Microscope Congratulations on purchasing your Omegon -III Nabla III microscope. This device offers you a number of advantages that are not usually common in this price range. Excellent DIN optics, adjustable Köhler LED illumination and high precision mechanics produce outstanding performance.
  • Page 3 Overview Omegon -III Nabla III B – Binocular Version Eyepiece Diopter adjustment Insert bracket Specimen holder Aperture diaphragm lever Condenser Filter Field diaphragm ring Binocular head 10. Binocular head locking screw 11. Body 12. Nosepiece 13. Objective 14. XY Stage 15.
  • Page 4 Features The Omegon -III Nabla III series biological microscopes are specially designed for teaching in universities and colleges, as well as primary and secondary schools. The ergonomic design makes the operation and use of the instrument more comfortable, and the user does not feel fatigue after long- term use.
  • Page 5  Built-in Köhler illumination with continuously adjustable LED source with light intensity control. The light path can be further adjusted using the field diaphragm.  Full Köhler N.A. 1.25 Abbe condensers, the height of which is controlled by a rack and pinion gear that allows focus adjustment of the condenser for correct illumination of the specimen;...
  • Page 6 The complete or partial reproduction of the contents of this document outside of private use is expressly prohibited in any form. Subject to changes and errors. All texts, images and symbols are property of NIMAX GmbH Manual_82928_EN_REV_A 6 / 19...

  • Page 7: Quick Start

    Calibration Open the slide holder on the mechanical stage and place a slide with a specimen on the stage. When you release the lever, the slide is clamped onto the stage. Then position the part of the specimen you want to examine more closely under the objective. Turn the nosepiece until the 4x objective is in the microscope's light path and use the coarse focus to move the microscope stage to the highest position under the objective.
  • Page 8 Rotate the diopter adjustment ring on the left eyepiece tube until the microscopic image observed in the left eyepiece is as sharp as that observed in the right eyepiece. At this point, the binocular adjustment is complete; scales on the dial between the two eyepiece tubes on the binocular head mark the pupil distance.
  • Page 9 Full Operating Procedure for Brightfield Observations 1) Turn the nosepiece until the 4x objective clicks into place. 2) Use the coarse focus adjustment to move the cross table all the way down. 3) With one hand, swing the slide lock lever to the side and with the other hand place a slide with an object on the cross table.
  • Page 10 move the specimen stage up to its highest point. Make sure the slide does not touch the objective.  Look down the eyepieces, slowly turn the coarse adjustment knob clockwise until the image of the specimen is bright and clear, always moving the slide away from the objective.
  • Page 11 bring the specimen into sharp focus.  Open your eyes, without looking through the eyepieces, turn the diopter ring of the other non-reticule eyepiece counter clockwise to the end.  Close the eye on the reticule eyepiece side. Open another eye and look through the non-reticule eyepiece.
  • Page 12 9) Obtaining proper Köhler illumination  With the 4X objective engaged and the specimen brought into focus, turn the field iris diaphragm ring clockwise to close the field diaphragm to near its minimum size. The field diaphragm is then visible (even if not in focus) (See Fig.
  • Page 13 the diameter of the exit pupil of the objective.  Insert the eyepiece back in the tube. Note: Aperture adjustment and proper focusing of the condenser are of critical importance in realizing the full potential of the objective. Condenser height is controlled by a rack and pinion gear system (i.e., the condenser focusing knob) that allows the condenser focus to be adjusted for proper illumination of the specimen.
  • Page 14 Use of the 100XR, Oil Immersion Objective  Focus on the specimen by switching the objectives from the lowest power to highest power.  Before engaging the immersion objective in the light path, place a drop of immersion oil onto the specimen at the area to be observed. ...

  • Page 15: Optional Accessories

    Optional Accessories Dark field observation Two types of dark field condensors are available, a dry dark field condensor (NA 1.25) and an oil condensor (NA 1.25–1.36). • Replace the condensor by the dark field condensor if necessary. • If dark field observation with oil is required, make sure to use the oil between the condensor and the rear part of the object carrier as well as between the front part of the object carrier and the lens (oil).

  • Page 16: Maintenance And Troubleshooting

    Maintenance and troubleshooting Before delivery, the microscope was subjected to testing and inspection. In order to ensure an optimal function and a longer lifespan, disassembly is not permitted under any circumstances. The instrument must be set up in a shady, cool and dry environment without corrosive influences. All lenses must be treated carefully and must not be disassembled or arbitrarily removed.

  • Page 17: Appendix 1: Troubleshooting

    Appendix 1: Troubleshooting Symptom Cause of the error Troubleshooting The nosepiece is not turned Rotate the nosepiece until the into the correct position. objective is in the correct position The field diaphragm is not Center the diaphragm using the centered adjustment screws at the condenser There dust...
  • Page 18 The preparate on the stage is Place the preparate onto the stage in The objective bumps into upside down the correct orientation the preparate before it is in Use cover glasses with 0,17mm focus The cover glass is too thick thickness The light bulb is not mounted Insert a new light bulb...

  • Page 19: Appendix 2: Technical Data

    Appendix 2: Technical Data Technical Data Binocular head Binocular head, 30°inclined 360° rotatable, eye distance 48mm-75mm Eyepiece Wide field eyepieces WF10×. Both eyepieces with dioptre adjustments Nosepiece with ball bearing: 4 positions with factory centered positions Nosepiece for all objectives Achromatic objectives：4×、10×、40×(S)、100×(S)Oilimmersion Objective Parfokal, centered...

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