Olympus BHT User manual

OLYMPUS SYSTEMMICROSCOPE
Model BHT
OLYMPUS

This instruction manual has been written for the use of the Olympus System Microscope Model
BHT. It is recommendedthat you read the manual carefully inorder to familiarize yourself fully
with the use of the microscope, so that you can obtain optimum performance from it.
IMPORTANT
0 bserve the following points carefully:
Operation
1.
Always handle the microscope with the care it deserves, and avoid abrupt motions.
2.
Avoid the use and maintenance of the microscope in direct sunlight, high temperature and
humidity, dust and vibration.
3. Only use the tension adjustment ring for altering the tension of the coarse adjustment
knobs. (Donot twist the two coarse adjustment knobs in opposite directions simultaneous-
ly, as this will cause damage.)
4. Make sure that the voltage selector switch on the base plate is set to conform with the local
mains voltage.
5.
Make it a point of grounding the microscope to prevent electric accidents.
Maintenance
1. Lenses must always be kept clean. Carefully wlpe off oil or fingerprints deposited on the
lens surfaces with gauze moistened with
a small amount of xylene, alcohol or ether.
2.
Do not use organic solutions to wipe the surfaces of various components. Plastic parts,
especially, should be cleaned with neutral detergent.
3. Never disassemble the microscope for repair. Only authorized Olympus service personnel
should make repairs.
4.
The microscope should be covered with the vinyl dust cover provided and stored in a place
free from humidity and fungi. For extended storage it is recommendedto keep objectives
and eyepieces in desiccators, containing desiccants such as silica gel.

CONTENTS
... STANDARD EQUIPMENT
II. NOMENCLATURE
Ill. ASSEMBLY
...................................
IV. IDENTIFICATION AND FUNCTION OF VARIOUS COMPOhlENTS . .
V. OPERATION ..................................
A. Switching on the Light Source
1 voltage Adjustment and Light Intensity I
B.
Placement of a Specimen Slide
pizGq ...............
kwecimen Slide 1
.............. C. Observation Tube
1. lnterpupillary Distance Adjustment
2. Diopter Adjustment
3. Light Path Selector
D. Condenser Adjustment .
1. Condenser Centration
Field lris Diaphragm
I
Aperture lris Diaphragm I
E. Focusing Adjustment ............................
1. Tension of Coarse Adjustment Knobs and Fine Adjustment
l~seof Rubber Cap for Fine Adjustment Knob
/
2. Pre-Focusing Lever
3. Adjustment of Stage Block Height
F. Use of Immersion Objectives .....
G. Photomicrography
VI. OPTICAL DATA
VII. TROUBLESHOOTING . .

I. STANDARD EQUIPMENT
Component Model
I Line cord UYCP 1 111111
Microscope stand BHT-F
I Quintuple revolving nosepiece BH2-5RE 1 1 1 1 1 1 1
1
Observation tubes
Square mechanical stage with right-hand
low drive coaxial controls BH2-SVR
Abbe condenser BH2-CD 1 1 0
Condensers
--
Swing-out condenser BH2-SC 0 0
Halogen lamp holder LS-20H 1 1
1
Binocular tube BH2-B130
o---
Trinocular tube BH2-TR30
- -
Halogenbulbs 6V20WHAL 2
D Ach. 4X. D Ach. IOX,D Ach. 40X, 1
D Ach. 100X (oil) each
0 bjectives D Plan 4X. D Plan 10X.D Plan 40X
D Plan 100X (oil) 0
1
I Eyepieces WHKIOX 1 2 1 2 1 2 1
1
0
r Filter
1
0
Photo eyepiece
N F K3.3X
I Immersionoil, bottled 11111
0
1
1 VinyTdust cover
0 0
1

II. NOMENCLATURE
The Model BHT consists of various components and interchangeableaccessories as shown in the
photo below.
A wide variety of combinations, standard or optional, is availableaccording toyour
requirements.
Revolving
Objective
"I
Stage
Microscopestand
Observation tube
Halogenlamp
holder
Condenser
Base

- -
Ill. ASSEMBLY
This picture illustrates the sequential procedure of assembly. The numbers indicate the
order of assembly of various components. Remove dust caps before mounting components.
Take care to keep all glass surfaces clean, and avoid scratching the glass surface.
NOTE:
For numbers O @ and 0 please refer toexplanations indetail on the next page.
Eyepiece
Condenser clamping screw
Halogen bulb
Condenser
(The N.A. scale
engraved onthe con-
Microscope stand
denser should face the
microscope front.)
Line cord 0 Outlet

Explanations in detail
@ Mounting the stage
1) Loosen the stage clamping screw @ by
rotating counterclockwise. (Fig.
1)
2) Insert the stage into the mounting dove-
tail of the microscope stand slowly and
lock with clamping screw.
@ Mounting the revolving nosepiece
1) L-oosen the nosepiece clamping screw a.
(Fig. 2)
2) Aligning the nosepiece dovetail slide to
the mounting block
@ , push inthe nose-
piece slowly all the way.
NOTE: Do not tilt or rock the nose-
piece while inserting into the
mounting block.
@ Mounting the observation tube
1) Loosen the clamping knob @ fully. Pull
spring-loaded clamping knob
@ . This
will cause the locating pin
@ towithdraw.
(Fig.
3) If the pin does not, loosen the
screw further until the pin withdraws.
2) With clamping knob @ pulled out, insert
the circular dovetail of the observation
tube into the ring dovetail.
3) Tighten the clamping knob.
Fig.
1
Fig. 3

IV. IDENTIFICATION AND FUNCTION OF VARIOUS COMPONENTS
Light path selector knob
Tension adjustment ring
Clockwise rotation increases
coarseadjustment tension.
Specimenholder
Stage clamprngscrew
Loosen the screw and
the stage can be rotated
Coarse
adjustment knob
/ Coarseadjustment
range 26mm
Aperture ~ris
diaphragm ring
Condenser centering knobs
Y-axis low drive control
knob
Y excursion range 50mm
Voltmeter /
Fineadjustment knob
Graduated in increments
/ Slidinq voltaqe control lever
Voltage lowers as the lever is
pulledtoward the microscope
front.

Photo tube
Condenser height
adjustment knob
Pre-focusinglever
7 Filter mount
L~necord
adjustment
Arrow mark 6 +O indicates
increase
in diaphragm diameter.

Summary of Putting the Microscope into Operation
Model
BHT
Match the voltage selector switch to local mains voltage (page 9).
Switch on the light source (page 9).
Place a specimen slide on the mechanical stage (page 9).
Coarse focus with the 1 OX objective (page 10. 13).
Make interpupillary distance and diopter adjustments (page 11).
Adjust the condenser position (page 12).
Swing in the desired objective.
Adjust light intensity.
Fine focus.
Adjust aperture iris diaphragm and field iris diaphragm (page
12).
Adjustment of Illumination System for Various Objective Powers
I
1 Condenser 1
Compatible Swing intop
lens
Objective
1 magnification
*N.A. is somewhat low, but st111compatible with a 100X objective.
(Cut off this page at dotted line and put iton the wall near the microscope for use as a reminder of micro-
scopic procedure.)
Achromatic-
condenser
BH2-AAC
OLYMPUS
Abbe
condenser
BH2-CD
Swing-out
condenser
BH2-SC
Low power
condenser
BH2-UL-C