Motic BA310Met User manual

1
We are constantly endeavouring to improve our instruments and to adapt them to the requirements of
modern research techniques and testing methods. This involves modification to the mechanical
structure and optical design of our instruments.
Therefore, all descriptions and illustrations in this instruction manual, including all specifications are
subject to change without notice.

2
INFINITY OPTICAL SYSTEM
An optical configuration (in which the specimen is located at the front focal plane of the objective)
gathers light transmitted through or reflected from the central portion of the specimen and produces a
parallel bundle of rays projected along the optical axis of the microscope toward the tube lens.
A portion of the light reaching the objective originates from the periphery of the specimen, and enters
the optical system at oblique angles, moving forward diagonally but still in parallel bundles toward the
tube lens. All of the light gathered by the tube lens is then focused at the intermediate image plane, and
subsequently enlarged by the eyepiece.
The real merit of the infinity based system lies in its ability to accommodate modular accessories in the
optical path and produce a flexible design.

3
TABLE OF CONTENTS
Section Page
I. DESCRIPTION 5
1. Application 5
2. Nomenclature 6
2.1 BA310Met 6
2.2 BA310Met-T 7
2.3 Epi Illuminator 8
II. SETTING UP THE INSTRUMENT 9
1. Operating environment 9
III. ASSEMBLING THE MICROSCOPE 9
1. Input voltage 9
2. Illumination 10
3. Stage 10
4. Objectives 10
5. Condenser for BA310Met-T 11
6. Eyepiece Tube 11
7. Eyepieces 11
8. Epi Illuminator 11
9. Filters for Epi Illuminator 12
10. Filters for transmitted illumination 12
11. Power Cord 13
IV. MICROSCOPY 14
1. Illumination Brightness Adjustment 14
2. Coarse and Fine Focusing 14
3. Coarse Focus Torque Adjustment 15
4. Coarse focus quick stop 15
5. Beam splitter lever 16
6. Interpupillary Distance Adjustment 16
7. Diopter Adjustment 16
8. Polariser and Analyser of Epi-illuminator Using 17

4
9. Field Diaphragm of Epi-illuminator Centering 17
10. Aperture Diaphragm of Epi-illuminator Using 18
11. Centering the condenser for BA310Met-T 19
12. Use of aperture diaphragm for BA310Met-T 19
13. Use of field diaphragm for BA310Met-T 20
14. Brightness and Contrast Adjustment 20
V. PHOTOMICROGRAPHIC PROCEDURE 21
VI. TROUBLESHOOTING TABLE 22
Optical 22
Electrical 23
VII. CARE AND MAINTENANCE 24
1. Do not disassemble 24
2. Cleaning the Microscope 24
A. Lenses and filters 24
B. Cleaning of painted or plastic components 24
3. Bulb Replacement 25
A. 12V/ 50W Halogen 25
B. 12V/ 3W LED Module 26
C. 6V/ 30W Halogen 26
D. 6V/ 3W LED Module 27
4. Disinfecting the Microscope 28
5. When not in use 28
VIII. WARNING LABELS 29

5
I. DESCRIPTION
1. Application:
The Motic BA310Met and BA310Met-T are suitable for use in all areas of research and industry
observing opaque material, e.g. in
a. Metallography
b. Mineralogy
c. Mechanical engineering
d. Electronics
Except bright field observation, BA310Met and BA310Met-T are also used for polarized light
observation. BA310Met and BA310Met-T can be installed with digital camera, video camera for
photomicrography.

6
2. Nomenclature
2.1 BA310Met

7
2.2 BA310Met-T

8
2.3 Epi Illuminator

9
II. SETTING UP THE INSTRUMENT
Avoid placing the instrument in locations exposed to direct sunlight, dust, vibration, high
temperature, high humidity and where it is difficult to unplug the power supply cord.
1. Operating environment
Indoor use
Altitude: Max 2000 meters
Ambient temperature: 5°C to 40°C
Maximum relative humidity: 75% for temperature up to 31°C decreasing linearly to 50% relative
humidity at 40°C
Supply voltage fluctuations: Not to exceed ±10% of the normal voltage.
Pollution degree: 2 (in according with IEC60664)
Installation / Overvoltage category: 2 (in according with IEC60664)
Air pressure of 75kPa to 106kPa
No hoar frost, dew, percolating water, rain
III. ASSEMBLING THE MICROSCOPE
1. Input voltage
The automatic voltage selection works with a broad range of settings. However, always use a
power cord that is rated for the voltage used in your area and that has been approved to meet local
safety standards. Using the wrong power cord could cause fire or equipment damage.
In case of using the extension cord, use only a power supply cord with a protective earth (PE) wire.
In order to prevent electric shock, always turn the power switch on the power supply off before
connecting the power cord.

10
Epi-illuminator Electrical Specifications:
Input: 115/ 230V~, 60/ 50Hz, 200VA
Bulb: 12V 50W Halogen or 12V 3W LED module
Fuse: 250V T2.5A (If the original fuse is blown, please replace with specified fuse)
Transmitted Illumination Electrical Specifications:
Input: 100-240V~, 80VA, 50-60Hz
Bulb: 6V 30W Halogen or 6V 3W LED module
Fuse: 250V T2.5A (If the original fuse is blown, please replace with specified fuse)
2. Illumination
Halogen lamp
The quartz halogen lamp, used as a light source, has higher luminance and color temperature than
conventional tungsten lamps. The luminance is approximately four times greater.
As long as the lamp voltage is kept constant, the halogen lamp maintains the same level of
brightness and color temperature regardless of whether it is new or nearing the end of its life.
LED module
The LED module is specially designed to be inserted into halogen bulb socket directly converting
halogen illumination to LED illumination. LED is more economical and environmental friendly and
combines the advantages of low heat and long life span.
3. Stage
Attaching the stage:
Lower the substage completely with the coarse focus knob
Place the stage on the substage and fix it with the four M4 screws that are attached with the stage.
The 3” x 2” stage comes with a glass plate as standard for BA310Met-T.
And when a slide glass is used for observation of the specimen, an optional slideglass holder must
be attached in place of the glass plate.
The 6” x 4” stage comes with a glass plate as standard for BA310Met-T and a wafer holder is
optional.
4. Objectives
Lower the stage completely. Screw the objectives into the revolving nosepiece so that clockwise
rotation of the nosepiece brings the next higher magnification objective into position.

11
5. Condenser for BA310Met-T
Raise the stage by turning the coarse focus knob.
Completely lower the condenser carrier by turning the condenser focus knob.
Insert the condenser into the dovetail mount with aperture scale facing forward towards the user.
Secure it with the condenser clamp screw.
Turn the condenser focus knob to raise the condenser as far as it will go.
6. Eyepiece tube
Loosen the eyepiece clamp screw. (Fig.1)
Insert the dovetail adapter on the eyepiece tube (Fig.2) into the dovetail mount on the
microscope arm.
Tighten the eyepiece tube clamp screw (Fig.2) to secure the eyepiece tube in place.
(Fig.1) (Fig.2)
7. Eyepieces
Use the same magnification eyepieces for both the eyes.
Insert each eyepiece into the eyepiece sleeve, and tighten the clamp screws.
8. Epi Illuminator
Loosen the arms clamp screw (Fig.3). Insert the round
dovetail adapter on the Epi illuminator into the
dovetail mount on the microscope arm.
(Fig.3)

12
Plug the power cord from lamp house to the outlet on the rear panel of the microscope.
(Fig.4)
For the best image quality, install the Epi illuminator horizontally.
9. Filters for Epi illuminator
Pull out the slider on Epi illuminator
Place the filter and/or ground glass in the filter holder on the slider and make sure the frosted side
of ground glass is faced to the lamp.
Push the slider to make sure the filter/ground glass stay in the optical path.
10. Filters for transmitted illumination
Remove the collector cover (Fig.5) and place the filter in the filter holder located around the field
lens, then screw the cover. Take care that dust, dirt and fingerprints do not get on the filter and
the field lens.
(Fig.5)

13
Filter selection:
Filter Function
ND2 (T=50%)
For brightness adjustment in photomicrography
ND4 (T=25%)
ND16 (T=6.25%)
Blue filter (colour balance filter) For routine microscopy and photomicrography
Green interference (546nm) For phase contrast and contrast adjustment with
black and white film
HE (didymium filter) For colour photomicrography of HE stained
specimen with tungsten type film
A diffuser is built into the base of the microscope.
11. Power cord
Connect the socket of the of the power cord to the AC inlet on the rear of the base of the microscope.
Plug in the other end of the cord to an AC outlet with ground conductor.

14
IV. MICROSCOPY
1. Illumination brightness adjustment
Turn the brightness adjustment knob fully counterclockwise to the low brightness position.
Set the power switch to “I” (ON).
The green line control lamp in the switch must light up.
The halogen lamp 12V/50 W in the Epi illuminator must light up.
When the Brightness adjustment knob is turned clockwise to the high brightness position, the light
intensity increases.
MRL100 Power Unit
2. Coarse and fine focusing
Focusing is carried out with the coarse and fine focus knobs at the left and right of the microscope
stand.
The direction of vertical movement of the stage corresponds to the turning direction of the focus
knobs.
One rotation of the fine focus knob moves the stage 0.2mm. The graduation on the fine focus knob
is 2 microns.
Never attempt either of the following actions, since doing so will damage the focusing
mechanism:
Rotate the left and right knob while holding the other.
Turning the coarse and fine focus knobs further than their limit.

15
3. Coarse focus torque adjustment
To increase the torque, turn the torque adjustment ring (Fig.7) located behind the left-hand coarse
focus knob in the direction indicated by the arrow. To reduce the torque, turn the ring in the
direction opposite to that indicated by the arrow.
(Fig.7)
4. Coarse focus quick stop
The coarse focus quick stop (Fig.8) makes the stage can fixed at any position at which the
specimen is in focus i.e. by using the handle to lock the coarse focus knob.
With the specimen in focus, turn the handle to fix the knob.
When the coarse focus quick stop is in position, the stage cannot be raised from that position.
However, the fine focus knob can move the stage regardless of the limit but will only lower the
stage.
Lower the stage by using the coarse focus knob.
(Fig.8)

16
5. Beam splitter lever
The beam splitter lever of the trinocular eyepiece tube can be used to select the amount of light
distributed between the trinocular eyepiece tube and the vertical phototube.
When the lever is pushed in until it reaches the limit, 100% of the light enters the observation tube.
When the lever is pulled out to the limit, the ratio of light entering the observation tube and
phototube will be 20:80.
6. Interpupillary distance adjustment
Before adjusting the interpupillary distance, bring a specimen into focus using the 10x objective.
Adjust the interpupillary distance (Fig.9) so that both the right and left field of view become one
This adjustment will enable the user to observe the specimen with both eyes
(Fig.9)
7. Diopter adjustment
Diopter adjustment compensates for the differences in vision between the left and right eyes. In
addition to making observation through both eyes easier, this adjustment also reduces the extent to
which focusing is lost when the objective magnification is changed. In particular, this occurs when a
low magnification objective is used.
The left eyepiece has a separate focusing provision to compensate for slight differences in the
focusing of each eye.
Using the right eye only and viewing through the right-hand eyepiece, adjust the focus with the
microscope fine or coarse adjustment until the image of the specimen is at its sharpest.
Using the left eye only and viewing through the left-hand eyepiece with its independent diopter-
focusing ring, focus until the specimen image is at its sharpest.
The microscope should now be ready for binocular viewing.

17
(Fig.10)
8. Polariser and Analyser of Epi-illuminator using
Insert the polariser (marked with “P”) into the front slot of Epi.
Insert the Analyser (marked with “A”) into the side slot of Epi.
Analyser is rotatable and the color of specimen with polarization will be changed when rotating.
(Fig.11)
9. Field diaphragm of Epi-illuminator centering
Clear diaphragm image can be obtained after the specimen is in focus.
Adjust the aperture diaphragm until aperture diaphragm is 2/3 of field then center the aperture
diaphragm via the knurled knob on the top of Epi illuminator.
Set the aperture diaphragm slightly bigger than the field of view by turning the adjustment wheel.

18
(Fig.12)
(Fig.13.a) (Fig.13.b)
10. Aperture diaphragm of Epi-illuminator using
The condenser aperture diaphragm is provided for adjusting the numerical aperture (N.A.) of the
illuminating system of the microscope, it decides the resolution of the image, contrast, depth of
focus and brightness.
Stopping down will lower the resolution and brightness but increase the contrast and depth of focus.
It is recommended that the aperture diaphragm is set at 2/3 of the objective N.A to get the best
contrast and image quality.
To adjust the aperture diaphragm:
Adjust the condenser aperture diaphragm lever referring to the condenser aperture scale or by
observing the diaphragm image visible on the exit pupil inside the eyepiece tube, or by using a
centering telescope after removing one of the eyepieces and focusing on the aperture diaphragm.

19
(Fig.14)
11. Centering the condenser for BA310Met-T
Fully open the field of view diaphragm and condenser aperture diaphragm.
Set the specimen on the stage with the cover glass facing up.
Bring the specimen image into focus, using the 10X objective.
Close the field of view diaphragm to its minimum setting by means of the field diaphragm ring.
Turn the condenser focus knob to bring the field diaphragm image into focus on the specimen plane.
Adjust the condenser centering screws so that the image of the field diaphragm appears at the
centre of the field of view. At this time, stopping the field diaphragm image, just short of the
maximum field of view, may be convenient for centering.
Adjust and centre the field diaphragm so that it is just outside the field of view for each
magnification change.
12. Use of aperture diaphragm for BA310Met-T
The condenser aperture diaphragm is provided for adjusting the numerical aperture (N.A.) of the
illuminating system of the microscope, it decides the resolution of the image, contrast, depth of
focus and brightness.
Stopping down will lower the resolution and brightness but increase the contrast and depth of focus.
An image with appropriate contrast can be obtained with an aperture setting that is 2/3 of the
objective N.A.
To adjust the aperture diaphragm:
○adjust the condenser aperture diaphragm ring referring to the condenser aperture scale, or
○by observing the diaphragm image visible on the exit pupil inside the eyepiece tube, or
○by using a centering telescope after removing one of the eyepieces and focusing on the
aperture diaphragm.