TEKSCOPE N2 Series, N2-1A, N2-1AEC500, N2-1AEC300 User Manual

TEKSCOPE MICROSCOPE

Models N2 Series

USER’S MANUAL

Contents N2 SERIES

Before use………………………………………………1

1.Nomenclature.……………………………………………2

2.Operation…………………………………………………4

2-1 Angle of

observation……………..………………………4

2-2 Set the specimen

slide…………..………………………4

2-3 Set illumination………………………………………4

2-4 Adjust

focus…………………………………………………4

2-5 Adjust diopter of binocular

head………………………5

2-6 Adjust

condenser…………………………………………5

2-7 Adjust

diaphragm………………………………………5

2-8 Choose the

objective……………………………………5

2-9 Change the

lamp………………………………………6

3.General

specification………………….………………………7

4.Configuration

drawing………………..………………………8

5.Parameter/technical terms……………..…………………9

6.Troubleshooting………………………………………………

…11

Before use N2 SERIES

1、 Operation

(1) As the microscope is a precision instrument, always handle

it with care, avoiding impact or abrupt movement during
transportation.

(2) Do not let the microscope emerge in the sun directly. Keep

it in a dry and clean place. Avoid high temperature and
acute shake. Following environment is required: Indoor
temperature: 0℃～40℃, Max relative humidity: 85%.

(3) Avoiding impact the definition of the image, do not leave

feculence or fingerprints on the lens surfaces.

(4) Before using, examine to ensure the power supply voltage

is consistent with the rating voltage.

2、 Maintenance

(1) All glass surfaces must always be kept clean. Fine dust on

the optical surface should be blown off by means of a hand
blower or gently wiped off with a soft lens tissue. Carefully
wipe off oil or fingerprints on the lens surfaces with tissue
moistened with a small amount of 3:7 mixture of alcohol
and ether.

(2) Do not use organic solution to wipe the surface of the other

components. These parts, especially the plastic parts,
should be cleaned with a neutral detergent.

(3) Do not take down or assemble it yourself.
(4) After use, cover the microscope with the dustcover

provided, and keep it in a dry and clean place for
preventing rust.

1. Nomenclature N2 SERIES

2.Operation N2 SERIES

The microscope is housed in a molded styrofoam container.

First take the container out of the carton, and lay the container

on its side. Open the container carefully and don’t let the
optical items drop down, avoiding them being damaged.
Check carefully to ensure the arm and accessories are well.

Second put the monocular head or binocular head onto the top

of the arm, and tighten the head-lock-screw. Install the
objective into the microscope nosepiece from the lowest
magnification to the highest, in a clockwise direction from
the rear. Insert the eyepiece into the eyepiece tube.

2-1 Angle of observation

Loosen the head-lock-screw and turn the monocular head or
binocular head to a comfortable position for observation.
Then lock the head-lock-screw.

2-2 Set the specimen slide

Place a specimen to be studied on a glass slide, and fix it by
the slide-holders of the mechanical stage. Turn the stage
knob to make certain that the specimen is centered over the
stage opening.

2-3 Set illumination

For the microscope only with mirror, turn the mirror to get
the field of view illuminated.
For the microscope with built-in electrical illuminator, insert
the plug of the main cable into the power socket and turn on
the power switch to get the specimen illuminated. Then turn
the brightness-adjustment­knob slowly to get the brightness suitable.

2-4 Adjust focus

Loosen the limit-stop-knob, and adjust the coarse-focusing-

knob to bring the slide into focus. Then lock the limit-stop­knob to avoid impact between the objective and slide. Adjust
the fine focusing knob

2.Operation N2 SERIES

to get the image clear.

For binocular head microscope, we also should do some
more adjustments:

(1)Hold the two ends of the head-cover and adjust the

interpupillary distance by pushing or pulling the cover, until
one circle of light can be seen.

(2)After finishing the interpupillary adjustment, look at the

graduation value in the middle of the head-cover. Turn the
two diopter-ring and aim the same graduation value at the
graduation line on the eyetube.
Avoiding decline of the stage, rotate the tension knob in a

clockwise direction to give a suitable force to the stage. If
we need to reduce the tension, rotate the tension knob in an
anti-clockwise direction.

2-5 Adjust diopter of binocular head
If the diopter of the two eyes is not same, binocular head

microscope has compensating function.

Turn the nosepiece to choose the objective 4X, and use the
left eye to observe the left eyepiece. Adjust fine-focusing­knob and focus correctly. Use right eye to observe the right
eyepiece. Gain the clear image by turning the diopter-ring
up and down.

2-6 Adjust condenser

Turn the condenser-adjustment-knob to make the condenser
move up or down to concentrate light and to get the image
brightness suitable for observation.

2-7 Adjust diaphragm

Adjust the aperture of the iris diaphragm to get the
background brightness suitable.

2-8 Choose the objective

Turn the nosepiece to choose the objective. The objective
selected should be set vertically right to the slide. Generally,
first use the

2.Operation N2 SERIES

objective 4X to focus to reveal general structural image.
Then use the higher power objective to reveal smaller
details.
When using the oil objective 100XR, a little of immersion
oil must be put between the objective and the cover glass.

2-9 Change the lamp or put on the mirror

Before changing the lamp, first pull the plug out off the

electrical socket and wait for a while until the lamp cools
down to avoid being burnt. Loosen the door-screw on the
bottom to open the small door. Then you can see the lamp
and lamp holder. Pull the lamp out and insert a new one into
the holder. Close the door by tightening the screw.

While changing the mirror, screw off the base-lens or mirror

and screw on a new mirror.

3.General specifications N2 SERIES

Install

Model

Parts

Specifications

N2-1A

N2-1A-

EC300

N2-1A-

EC500

EC300 digital camera

●

Digital
camera

EC500 digital camera

●

WF10X/18mm

●(x2)

●(x2)

●(x2)

WF10X/18mm with pointer

WF10X/18mm with reticle

WF15X/13mm

WF

eyepiece

WF20X/10mm

●(x2)

●(x2)

●(x2)

4X/0.10

●●●

10X/0.25

●●●

40XS/0.65

●●●

60XS/0.85

195

objectives

100XS/1.25(oil)

●●●

Monocular head 360°rotating

Binocular head 360°rotating

●●●

45°viewing

head

Trinocular head 360°rotating

Coaxial

focusing

system

The arm stand with ascending and

descending stage

●●●

Triple nosepiece

Nosepiece

Quadruple nosepiece

●●●

Stage

Built in mechanical stage 130mmX140

mm(moving range:50mmx76mm)

●●●

Condenser

AbbeN.A.1.25

●●●

Diaphragm

Iris diaphragm

●●●

Built in halogen illuminator with a

continuous adjustment of brightness

●●●

Light

ф50mm mirror

Lamp

LED

●●●

Filter

blue

●●●

N2 Series Biological Microscope general specifications (For
option)

4.Configuration drawing N2 SERIES

CCD

VIDEO

CAMERA

XS

GP

H

XSG

TH30

R

XSG

TH45

L

XSGB

H30R

XSG

BH4

5L

XSGPC

M50

XSGCD1.25(XSPID)

XS

GNI3XS

GNI

4

XS

GF

1

OP100s OP40s OP10 OP4

OA100s OA60s

OA40s OA10

OA4

EWF10X18 EWF10X18p

EWF15X16 EWF20X10

EP5 EP10 EP16

5.Parameter/technical terms N2 SERIES

5-1 Objective

5-2Eyepiece

5-3Electrics

Type

Magnification

Numerical

aperture（

N.A）

Medium

Parfocal
distance

（mm）

Magnificati

on

market

（color

ring）

4X

0.10

Air45Red

10X

0.25

Air45Yellow

40X

0.65

Air

45

Light blue

60X

0.85

Air

45

Deep blue

DIN

achromatic

objective

195mm

100X

1.25

Cedar

oil

45

White

4X

0.10

Air

45

Red

10X

0.25

Air

45

Yellow

40X

0.65

Air

45

Light blue

Plan

objective

195mm

100X

1.25

Cedar

oil

45

White

Type

Wide field eyepiece

Plan eyepiece

Magnification

10X

15X

20X5X10X

16X

Field of

view（mm）

ф18

ф13

ф11

ф18

ф18

ф15

XSG

MH4

5

XSG

SGM

XS

GC

C

The electrics are assembled according to customer’s order.

There are two kinds for option.

220V～240V power supply : 220V～240V±10%, 50/60Hz
Lamp: 6V/20W Halogen lamp
The electrics have gained the CE and GS certification.
100V～120V power supply : 100V～120V±10%, 50/60Hz
Lamp: 6V/20W Halogen lamp
The electrics have gained the UL certification.

5.Parameter/technical terms N2 SERIES

5-4 Parameter

(1) Total magnification: 20X～2000X
(2) Field of view: ф0.8mm～ф4.5mm

(3) Mechanical tube length: 160mm

(4) Object to primary image distance: 195mm

(5) Fine focusing sensitivity: 0.002mm

5-5 Technical terms

(1) Total magnification=(magnification of objective) X (magnification

of eyepiece)

(2) Field of view=(line field of view of the eyepiece selected)

÷(magnification of the objective selected)

(3) N.A.=n·sinα (max), N.A.is very important parameter which marks

the features of the objective and condenser. The “n” is the refractive

index of the medium (air or immersion oil) between the cover glass

of the objective and the specimen. The “α” is the half of the aperture

angle. The N.A.is bigger, the resolution of the objective is higher.

(4) Object to primary image distance: the distance between the object

plane to the primary image plane. The conjugate distance is fixed.

(5) Mechanical tube length: The distance between the objective shoulder

and the ocular shoulder.

6.Troubleshooting N2SERIES

Symptom

Cause

Remedy

Optics

The nosepiece is not in the right
position.

Turn the nosepiece into
the right position.

(1)The side of the
field of view is dark
or not even.

Stain or dust has accumulated on
the condenser, objective,
eyepieces, base lens. .

Clean the lens.

Stains have accumulated on the
specimen.

Clean the specimen.

(2)Stain or dust is
observed in the field
of view.

Stains have accumulated on the
lens.

Clean the lens.

No cover glass on the specimen
slide.

Add the cover glass.

The cover glass is not standard.

Use a standard cover glass
with thickness 0.17mm.

The specimen faces down.

Make it face up.

The immersion oil has
accumulated on the dry objective.

Clean thoroughly.

The immersion oil is not used for
oil objective 100XR.

Use immersion oil.
Air bubble in the immersion.

Get rid of the air bubble.

Use wrong immersion oil.

Use a correct one.

The aperture is not opened to
correct size.

Adjust the iris diaphragm.

Stain or dust has accumulated on
the lens in the inlet of the head.

Clean the lens.

(3)Unclear image

The condenser is not in the right
position.

Adjust the condenser.

The specimen slide is not fixed.

Fix with clips.

(4)One side of the
field of view is dark
or the image moves
while focusing.

The nosepiece is not in the right
position.

Turn the nosepiece into
the right position.

The iris diaphragm is not big
enough.

Adjust the iris diaphragm.

The condenser is not in the right
position.

Adjust the condenser.

(5)The field of view
is not bright enough.

Stain or dust has accumulated on
the condenser, objective,
eyepieces, base lens.

Clean the lens.

6.Troubleshooting N2 SERIES

Symptom

Cause

Remedy

Optics

The brightness­adjustment­knob is not in the right
position.

Adjust the brightness­adjustment-knob.

(6)The image color is
not true.

No filter is used.

Use correct filter.

Mechanics

The cover glass faces
down.

Put the cover glass to face up.

(1)The image is not
focused while using
high power objective.

The cover glass is not
standard.

Use a standard cover glass with
thickness 0.17mm.

The cover glass faces
down.

Put the cover glass to face up.

(2)The objective
touches the cover glass
while turning the
nosepiece.

The cover glass is not
standard.

Use a standard cover glass with
thickness 0.17mm.

The slide is not fixed
correctly.

Adjust it correctly.

(3)Can not move the
slide smoothly.

The movable specimen
holder is not fixed
properly.

Tighten it.

(4)Focus-knob is not
flexible.

Tension knob is too
tight.

Loosen it a little.

(5)The stage declines
itself to make the
image unclear.

Tension knob is too
loose.

Tighten it a little.

(6)When focusing up,
the coarse-focusing­knob can not rotate.

Limit-stop–knob
locked.

Loosen the limit-stop-knob and
lock it after refocusing.

Electrics

No power supply.

Check the connection of the
power cable.

The bulb is not inserted
correctly.

Insert it correctly.
The bulb burnt out.

Replace it.

(1)The bulb does not
work.

The fuse burnt out.

Replace it.

The voltage is too high.

Use correct power supply.

(2)The bulb burnt out
usually.

Use a wrong bulb.

Replace with a correct one.

6.Troubleshooting N2 SERIES

Symptom

Cause

Remedy

Electrics

(3)The fuse burnt out
usually.

The voltage is too high.

Use correct power supply.

The bulb will burn out
soon.

Replace with a new one.

(4)The bulb flickers or
the brightness is not
stable.

The wire doesn’t
connect all right.

Connect correctly.