BestScope BS-2073 Series Instruction Manual
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BestScope BS-2073 Series Instruction Manual

Biological microscope
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Biological Microscope
BS-2073, BS-2074 Series
Instruction Manual
BS-2073B
BS-2074B
This manual is for the biological microscope Model BS-2073, BS-2074. To ensure the safety,
obtain optimum performance and to familiarize yourself fully with the use of this microscope, it is
recommended strongly that you study this manual thoroughly before operating the microscope.

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  • Page 1 Biological Microscope BS-2073, BS-2074 Series Instruction Manual BS-2073B BS-2074B This manual is for the biological microscope Model BS-2073, BS-2074. To ensure the safety, obtain optimum performance and to familiarize yourself fully with the use of this microscope, it is recommended strongly that you study this manual thoroughly before operating the microscope.

  • Page 2: Table Of Contents

    BestScope International Limited CONTENTS BS-2073,BS-2074 User Notices .................... 2 1. Components Names ................4 2. Assembly ....................5 2.1Assembly Diagram ........................ 5 2.2Assembly Procedure......................6 3. Adjustment And Operation ..............9 3.1Adjustment Set Diagram ...................... 9 3.2Operation ........................... 13 4. Video Attachment ................18 4.1Installing Trinocular Viewing Head And Video Attachment ..........

  • Page 3: User Notices

    BestScope International Limited Use Notices BS-2073,BS-2074 Ⅰ. Configuration Instruction 1. BS-2073 is the basic model and uses NIS45 system; 2. BS-2074 is coding model, using NIS60 system, with brightness memory, wire resistance stage and other configurations. Ⅱ. Principle and Application Principle: Using the appropriate adjustment combination of two lens sets, the specimen is magnified and observed.
  • Page 4 BestScope International Limited Ⅴ. Maintenance and Care All the lenses have been adjusted properly, do not dismount them by yourself please. The nosepiece and coarse and fine focusing parts are so delicate that it is forbidden to disassemble them carelessly by yourself.

  • Page 5: Components Names

    BestScope International Limited 1.Components Name BS-2073,BS-2074 Model BS-2073 Eyepiece Viewing head Nosepiece Objective Condenser Stage Main body Model BS-2074 Viewing head Eyepiece Objective Encoded nosepiece Condenser Stage Main body...

  • Page 6: Assembly

    BestScope International Limited 2.Assembly BS-2073,BS-2074 2.1 Assembly Diagram The diagram below shows how to assemble the various components. The numbers indicate the order of assembly.  When assembling the components, make sure that all parts are free of dust and dirt, and avoid scratching any parts or touching glass surfaces.

  • Page 7: Assembly Procedure

    BestScope International Limited BS-2073,BS-2074 2.2 Assembly Procedure 2.2.1 Installing the Objective (Fig.1-2) 1. Adjust the coarse focus knob until the support device of the mechanical stage reach its low limit position. Screw the lowest magnification objective into the nosepiece from the left or the right side, then revolve the nosepiece clockwise/counterclockwise and mount other objectives by the sequence of low to high magnification.
  • Page 8 BestScope International Limited BS-2073,BS-2074 2.2.2 Connecting the power cord (Fig.4-5) ★ The cable and cords are vulnerable when bent or twisted, never subject the power cord to excessive force. Set the main switch① to “O” (off) state before connecting ①...
  • Page 9 BestScope International Limited BS-2073,BS-2074 2.2.4 Mounting the filters (Fig.8) Place the required filter into the appropriate hole of the collector. Fig.8 2.2.5 LED lamp replacement (Fig.9-11) ◎ Generally, LED lamp is very durable, so it is not easy to damage. If it is unfortunately damaged, please purchase the LED (Fig.11) from your vendors.

  • Page 10: Adjustment And Operation

    BestScope International Limited 3.Adjustment And Operation BS-2073,BS-2074 3.1 Adjustment Set Diagram Model BS-2073 Interpupillary Distance Indicator Phase Contrast Slider Condenser Focusing Knob Aperture Diaphragm Tension Adjustment Collector Field Stop Collar Left Fine Focus Knob Brightness Adjustment Left Coarse Main Knob...
  • Page 11 BestScope International Limited BS-2073,BS-2074 Portrait Adjustment Knob Lateral Adjustment Knob Right Fine Focus Knob Locking Knob Power Socket...
  • Page 12 BestScope International Limited BS-2073,BS-2074 Model BS-2074 Interpupillary Distance Indicator Phase Contrast Slider Condenser Focusing Knob Aperture Diaphragm Collector Tension Adjustment Collar Filed Stop Left Fine Focus Knob LCD(Liquid Crystal Display) Main Left Coarse Brightness Adjustment Switch Focus Knob Knob LCD Screen...
  • Page 13 BestScope International Limited BS-2073,BS-2074 USB Interface Portrait Adjustment Knob Lateral Adjustment Knob Right Fine Focus Knob Locking Knob Power Socket...

  • Page 14: Operation

    BestScope International Limited BS-2073,BS-2074 3.2 Operation 3.2.1 Brightness Adjustment (Fig.12-15) Connect the power cord and set the main switch① on the right side of microscope to “－”state (ON). Turning the brightness adjustment knob② in the direction shown in the figure, the voltage raise, and the brightness ①...
  • Page 15 BestScope International Limited BS-2073,BS-2074 3. Double-click Knob: lock brightness or unlock (Fig.15). The brightness adjustment knob fails when locking, and ”LOCK” appears on the LCD screen; Double-click the knob again to release the lock and the “LOCK” on the screen disappears;...
  • Page 16 BestScope International Limited BS-2073,BS-2074 3.2.2 Placing the Specimen (Fig.16-17) Place the specimen in the center of the mechanical stage and use the stage clips to clamp it. Turn the portrait and lateral adjustment knob① of the mechanical ruler, move the specimen to the required position.
  • Page 17 BestScope International Limited BS-2073,BS-2074 3.2.5 Adjusting the tension adjustment collar (Fig.20) ★ The tension of the coarse focus knob had already adjusted before leaving factory. If it is too loose(the mechanical stage slides down because of its own weight), please turn the tension adjustment collar①...
  • Page 18 BestScope International Limited BS-2073,BS-2074 3.2.7 Adjustment of Field Stop (Fig.22) Turn the field stop ring③ in the direction shown in ③ the figure to close the filed stop. Turn the field stop ring in the opposite direction to increase the filed stop.

  • Page 19: Video Attachment

    BestScope International Limited 4.Video Attachment BS-2073,BS-2074 4.1 Installing Trinocular Viewing Head And Video Attachment (Fig.25) 1. Mount the trinocular viewing head according to the assembly path① in Fig.25 into the round dovetail of ③ Ⅲ the microscope and tighten the screwⅠ to fix the viewing head;...

  • Page 20: Digital Viewing Head

    BestScope International Limited 5.Digital Viewing Head BS-2073,BS-2074 5.1 Digital Viewing Head (Fig.27-28) There are two types of digital viewing heads to choose from: wired digital viewing head (Fig.27) and wireless digital viewing head(Fig.28). 1. The wired digital viewing head only has one interface.

  • Page 21: Fluorescent Observation

    BestScope International Limited 6.Fluorescent Observation BS-2073,BS-2074 6.1 Fluorescent Set (Fig.30-31) The fluorescent set uses 3W LED as illuminant and has two fluorescence modules: B band fluorescence module and G band fluorescence module or U band fluorescence module. When the lever① is adjusted to the leftmost end, it is B band fluorescence module.

  • Page 22: Phase Contrast Observation

    BestScope International Limited 7.Phase Contrast Observation BS-2073,BS-2074 7.1 Components Name 7.1.1 Phase Contrast Objective The optional objective magnification of the phase contrast is: 10×, 20×, 40×, 100×. If you want to know how to mount the phase contrast 2.2.2 objective, please see .
  • Page 23 BestScope International Limited BS-2073,BS-2074 7.2.2 Centering Diaphragm (Fig.35) Generally do not need to center. If necessary, please adjust the diaphragm according to the following steps: 1. Place the specimen on the stage and focus it. Take out a eyepiece and replace it with the centering telescope(CT).

  • Page 24: Dark Field Observation

    BestScope International Limited 8.Dark Field Observation BS-2073,BS-2074 8.1 Bright and Dark Filed Components (Fig.36) The halo① used in the dark filed observation is dark filed illumination board, while the opening② is used for bright filed. 8.2 Installation and Use (Fig.37) ①...

  • Page 25: Simple Polarization Set

    BestScope International Limited 9.Simple Polarization Set BS-2073,BS-2074 9.1 Components Name 9.1.1 Polarization Set (Fig.38) Polarization observation has two necessary components: polarizer① and analyzer②. The analyzer can be rotated ② ① at 0-90°. In orthogonal polarization observation, it is necessary to turn the analyzer to make the vibration directions of the polarizer and the analyzer perpendicular to each other and the filed of view is darkest.

  • Page 26: Technical Specifications

    BestScope International Limited 10．Technical Specifications BS-2073,BS-2074 (1). Main Specifications Components Name Specification BS-2073B BS-2074B Optical System Infinite optical system ● ● Seidentopf Binocular Head, 30° Inclined, Interpupillary 47-78mm ● ● Seidentopf Trinocular Head (5:5) ○ ○ Viewing Head Seidentopf Trinocular Head (0:100/100:0) ○...
  • Page 27 BestScope International Limited BS-2073,BS-2074 (2). Objective Parameters Numerical Working Distance Conjugate Type Magnification Aperture (N.A) (mm) Distance ∞ 4× 0.10 20.6 ∞ 10× 0.25 17.9 Plan Achromatic ∞ 20× 0.40 Objective (NIS45) ∞ 40× 0.65 100× (Water) 0.16 ∞ 2×...

  • Page 28: Trouble Shooting

    BestScope International Limited 11．Trouble Shooting BS-2073,BS-2074 (1). Optical Part TROUBLE CAUSE SOLUTION The nosepiece is not in the located position Turn to the location (the objective enter the optical The edge of the field (objective and light path not coaxial)
  • Page 29 BestScope International Limited BS-2073,BS-2074 Reinstall the condenser and center the condenser with the centering screw Condenser is not properly centered or inclined One side of image is blurred The nosepiece is not properly engaged Engage the nosepiece properly The specimen is not clamped...
  • Page 30 BestScope International Limited BS-2073,BS-2074 (3). Electrical Part TROUBLE CAUSE SOLUTION check the connection of the power No power supply cord The lamp cannot light when the The connector of LED lamp is not properly inserted Insert it correctly switch is turned on...

This manual is also suitable for:

Bs-2074 seriesBs-2073bBs-2074b

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