Leica L5 FL User manual

Leica L5 FL
User manual

Leica L5 FL 2
Contents
Overview
Safety concept 4
Symbols 7
Assembly
Fiber-optics connection 9
Excitation filter 10
Operation
Hinged arm 12
Stereomicroscopes M series 13
Stereomicroscopes S series 14
Remote control connection 15
Lamp: Installation, replacement 16
Starting up 17
Luminous intensity setting 18
Electronic setting 18
Mechanical diaphragm 20
Additional optics 20
Adjusting the focusing lens 21
Maintenance 22
Removing malfunctions 22
Accessories, spare parts 24
Technical data 25

Leica L5 FL3
LeicaL5FLOverview
1. Power switch
2. Fiber-optics connection
3. Electronic luminous intensity setting
4. Mechanical luminous intensity setting
5. LCD
6. Pivoted lever for additional optics
7. Filter wheel
8. Socket for remote control
and/or tilt switch
9. Carrying handle
10. Lamp housing with halogen cold-light reflector lamp
11. Release button for lamp housing
12. Power supply cord
13. Ventilation openings (front side of instrument)
14. Ventilation openings (side of instrument)
15. Exhaust screen (rear of instrument)
16. Fuse (bottom of instrument)
17. Identification label (bottom of instrument)
18. Color temperature display
19. Error status display
20. Note on maximum luminous intensity
21. Note on "STANDBY” mode
22. Note on connected remote control

Leica L5 FL4
Intended use:
The Leica L5 FL cold-light source is intended for use in
industry and laboratories.
Cold-light sources are used for intensive illumination of all
types of objects. The infrared portions of the lamp radiation
are filtered out. Visible light of high intensity is guided
to the object through flexible or self-supporting movable
fiber-optic light guides.
The light source was developed for operation in dry rooms
only (see page 25 "Technical Data").
This instrument is not intended for operation in explosion-
prone areas.
A safe disconnect from the power supply system is
achieved by disconnecting the power plug. The instrument
must not be opened, disassembled or modified.
Technical changes to the instrument are not allowed.
Repairs may only be performed by the manufacturer or
authorized customer service centers.
Please ensure that every user of the instrument has
immediate access to these operating instructions.
The manufacturer is not liable for any damages resulting from
the noncompliance with these operating instructions.
Safetyconcept

Leica L5 FL 5
The instrument was tested and certified according to the
applicable standards for electrical lab equipment (DIN EN
61010-1 orUL 3101-1), the 230 V version also in accordance
with the standardfor medical-electrical equipment (DIN EN
60601-1).
Avoid looking directly into the open tensioning sleeve or
the fiber-optics output when the light source is activated.
The Leica L5 FL emits visible light of high intensity. Since
light-absorbing materials have the physical characteristic
of converting incident light into heat, damages may occur to
heat-sensitive or inflammable light-absorbing materials.
To avoid such thermal damages and possible fire hazards or
risk of burns, please observe the following notes:
-Never cover the open tensioning sleeve or the fiber-optics
output (fire hazard)!
-Never cover the open tensioning sleeve or the fiber-optics
output with your hand or another body part (risk of burns)!
-When illuminating heat-sensitive or inflammable light-
absorbing objects (e.g. in microscopy), special attention
should be paid to select a distance of the fiber-optic light
guide and lamp brightness that will not create any thermal
damages to the object.

Leica L5 FL6
-All fiber-optics outputs that are not used in the operation
must always be located at a safe distance—at least 10 cm—
from heat-sensitive or inflammable light-absorbing materials
with activated light source (avoiding possible fire hazards).
-For this reason, pay attention to the safe distance with fiber-
optic materials, e.g. from dark/colored textiles and
dark/colored wood or plastic surfaces.
-To avoid unnecessary stress on biological tissue through
illumination with visible light, reduce the brightness and
duration of the illumination to the absolute necessary
measure.
It is absolutely necessary that:
-the Leica L5 FL cold-light source is operated with the
voltage listed on the identification label (17).
-all ventilation openings (13, 14, 15) must be kept open; with
insufficient cooling, an integrated thermal circuit breaker
temporarily switches off the instrument (see page 22
"Removing Malfunctions").
-the lamp has cooled off before replacing it. As a reminder,
a warning label is affixed in the door of the lamp housing.
-the filter wheel has cooled off before removing it. It is
equipped with the warning label.
-the light source is operated only with inserted filter wheel.
The filter wheel must always be located in one of the five
lock-in positions.
Safetyconcept

Leica L5 FL 7
Warning about electrical voltage
This symbol denotes information which must be read and
obeyed.
Nonobservance can put personnel at risk!
Warning about a danger area
This symbol denotes information which must be read and
obeyed. Nonobservance can put personnel at risk! (Caution,
observe the documentation)
Nonobservance can cause malfunctioning or damage to the
equipment.
Warning about hot surfaces
Risk of burns in case of a hot surface!
Important Information
This symbol denotes additional information or explanations
which promote understanding.
Action
Within the text, this symbol indicates actions that must be
performed.
Explanatory notes
This symbol is found in texts next to supplementary
information and explanations.
Symbols

8
Leica Stereomicroscope MZ6
with Leica L5 FL
Leica Stereomicroscope S8 APO
with Leica L5 FL

Leica L5 FL 9
The fiber-optic light guide for the fluorescence
illumination has a special diameter of 9 mm. For
this reason, the connecting adapter must be
removed before the fiber-optic light guide can be
inserted. First, the outer black ring is completely
removed by turning it counterclockwise (Figs. 1
and 2).
The connecting adapter warms up during operati-
on. Please ensure that it is cooled off before
removing it.
To remove the adapter, first completely
unscrew the black ring.
Next, slightly press the adapter together at the
marked positions and remove it.
The adapter is inserted in reverse order.
Please store the connecting adapter in a safe
place for later use with other fiber-optic light
guides.
Screw the black ring back on the fiber-optics
connection (Fig. 4), but do not tighten it at this
time.
Insert the fiber-optic light guide until it stops
and close the fiber-optics receptacle (Fig. 5).
If other fiber-optic light guides are used:
If fiber-optic light guides with guide pins are used,
it must be observed that it is fitted into one of the
four collet chuck slots.
Assembly
Fig. 1
Fiber-optics connection
Fig. 2
Connecting adapter
Fiber-optics
connection
Fig. 3 Fiber-optics connection
without connecting adapter
Fig. 4
Black ring
Fig. 5
Connected fiber-optic light guide

Leica L5 FL10
Please ensure that your Leica L5 FL is operated
only with inserted filter wheel.
Only then is a perfect air cooling of the light
source possible.
Please ensure that the filter wheel is always
locked in one of the preset lock-in positions.
Operating the light source at an interim position
of the filter wheel can cause the wheel to
overheat. The knurling of the filter wheel features
position marks (the position 0 through 4 are marked
by means of raised points in corresponding
numbers).
The excitation filter is inserted in the Leica L5 FL
cold-light source.
To insert the filter in the filter wheel, the
filter holder must be removed from the lamp.
Next, the filter holder (Fig. 1) must be
disassembled. This requires a Philips-type
screwdriver.
Please ensure that the light source is switched off
and has cooled off before removing the filter
wheel. A warning label is attached as a reminder.
Excitation filter
(M series and S series)
Fig. 1
Disassembled
filter holder
Assembly

Leica L5 FL 11
To mount the filter wheel, unscrew the
cross-recessed screw and remove the filter
holder plate.
The excitation filter must now be inserted in one
of the five open filter holders.
The daylight filter (Fig. 2) is handled in the same
way. The daylight filter is part of the standard
delivery and is used to increase the color
temperature (for bright field applications). The
filter wheel features 5 positions for max. five
filters.
Fit the filter holder plate on and fasten it
(Fig. 2).
Insert the filter wheel in the guide and slide it
into the light source until it engages (Fig. 3).
Fig. 2
Mounted filter wheel with
fluorescence excitation
and daylight filter
Fig. 3
Inserting the filter wheel

Leica L5 FL12
The hinged arm can be opened and closed using
the central rotary knob.
Turn it to the left and all joints are freely
movable. The support arm can now be
positioned.
Next, turn the rotary knob clockwise
to lock all joints.
Hinged arm for
illumination and
UV protective filter
Stereomicroscopes
M series
Connection of the illumination
optics with holder (M and
S series)
Hinged arm
Connecting the arm
to the column terminal (M
series).
Operation

Leica L5 FL 13
Suppression filter with
filter-slide housing
The left holder with the red UV protective filter is
optional. Leica recommends the use of such a filter
to protect the eyes of the observer.
After assembling the illumination system, the filter-
slide housing must be inserted between microsco-
pe body and observation tube.
The fluorescence attachment contains a filter-slide
housing for two suppression filters. The standard
equipment contains one suppression filter. The
second position can be used for an additional
suppression filter.
Filter-slide housing with filter slide and filters. One
filter is part of the equipment. The second filter
shown is optional.
The filter slide is inserted into the filter-slide
housing on the side. The filter-slide housing has
three lock-in positions. One for bright field
applications (no filter in the beam path). Two
additional positions are for suppression filters.
Overview of assembly
M series
Overview of assembly
M series
Filter slide
housing M series

Leica L5 FL14
Stereomicroscopes
S series
The fluorescence attachment contains a filter-slide
housing for two suppression filters. The standard
equipment contains one suppression filter. The
second position can be used for an additional
suppression filter.
Filter-slide housing with filter glass and clear
glass. (The second filter shown is optional).
If only one suppression filter is used, a clear glass
filter must be inserted in the second position. This
glass is required so that the working distance
remains unchanged if the user switches between
fluorescence and bright field application.
The filter-slide housing is mounted on the
stereomicroscope as shown in Fig. 2.
The left side features a threaded hole with
recessed screw that must be tightened
using an Allen key (1.5 mm).
The left holder with the red UV protective filter is
optional. Leica recommends the use of such a filter
to protect the eyes of the observer (Fig. 3).
Hinged arm see page 12.
Fig. 1 - Suppression filter with
filter-slide housing
Fig. 2 - Overview of the
assembly of the S series
Fig. 3 - Connection of the
hinged arm on the microscope
carrier S series
Assembly

Leica L5 FL 15
Remote control connection
Remote control
connection
Remote control and/or tilt switch (accessories) can
be connected to the light source via the socket (8).
If the remote control is connected, the LCD display
shows the note "REMOTE" (22). The electronic
luminous intensity setting is now carried out via
remote control, and the luminous intensity control
(3) is deactivated.
Remote control and tilt switch allow switching the
light source to "STANDBY" mode to protect the
halogen lamp. A corresponding note (21) appears
on the display.
Please always observe the following rules:
In "STANDBY" mode, the instrument is not dis-
connected from the power supply system. Supply
voltage continues to be present at the transformer
of the light source! Connecting and disconnecting
the remote control (or the tilt switch) from the light
source should only be carried out when the
instrument is switched off.

Leica L5 FL16
Lamp:
Installation,
replacement
Please ensure that lamp and lamp mount are
cooled off before replacing them.
A corresponding warning label is attached as a
reminder.
Switch off the light source.
Open the lamp housing (10) by pressing the
release button (11) and pull it out to the stop
(Fig. 1).
Press both levers of the special socket down
and pull out the defective bulb.
The two levers must also be pressed down
when the new bulb is inserted.
Insert the lamp housing to the stop
(you should hear it engage).
Switch on the light source.
Fig. 1
Halogen bulb in mount
Fig. 2
Lamp mount for halogen lamp
Fig. 3
2 sockets for halogen lamp
Assembly

Leica L5 FL 17
Starting up The instrument is switched on and off by
pressing the main power switch (Fig. 1).
To protect your eyes, avoid looking directly into the
fiber-optics connection or onto the end of connec-
ted fiber-optic light guides!
Position:
The instrument is switched off.
Position:
The instrument is switched on.
The Leica L5 FL is equipped with a soft start to
protect the halogen lamp that reduces an otherwi-
se high starting current. In addition, an electronic
stabilization of the lamp voltage ensures stable
luminous efficiency, independent of supply voltage
fluctuations.
Fig. 1
Main power switch
Operation

Leica L5 FL18
Luminous intensity
setting
Electronic setting
The Leica L5 FL is equipped with two independent
luminous intensity settings.
The continuous electronic adjustment allows
optimizing the lamp service life.
The exact adjustment of the required brightness
allows you to achieve the highest possible service
life of your halogen lamp. A change in the luminous
intensity also results in a change of the color
temperature of the emitted light.
The mechanical adjustment allows for the
continuous change of the luminous intensity with
constant color temperature.
Four lock-in positions are located between the two
settings of the adjusting knob. They represent fixed
positions and ensure that the brightness settings
can be reproduced.
The lowest luminous intensity is reached in
position 1, the maximum brightness is reached in
position 6.
The two barriers at positions 4 and 5 are
overcome by pressing the adjusting knob.
Adjusting the light spot
Operation

Leica L5 FL 19
The adjusting knob cannot be turned past the
grade limit stops 1 and 6.
The life of the bulb is approx. 1,500 h in position 4
and approx. 150 h in position 5.
In position 6, the halogen lamp is operated with
rated voltage. The bulb reaches roughly the rated
service life indicated by the bulb manufacturer
(type-dependent).
The LCD display (5) shows the approximate color
temperature of the light emitted by the halogen
lamp (18).
The color temperature of the light can be
adjusted by turning the luminous intensity
control (3) (step increments of 50 K).
After overstepping the barrier at position 5, a lamp
symbol (20) appears on the LCD display that
flashes for a few seconds. It serves as a maximum
light indicator and indicates that the expected bulb
service life is reduced compared to position 5.
LCD

Leica L5 FL20
Mechanical diaphragm
Additional optics
The luminous intensity is continuously adjusta-
ble without changing the color temperature by
turning the adjusting knob of the mechanical
diaphragm (4).
Two fixed grade limit stops and three
additional lock-in positions (marked with the
letters A through E) allow selecting previously
defined diaphragm settings.
Position A results in the lowest brightness, while
Position E (completely opened diaphragm)
achieves the maximum brightness. Turning the
adjusting knob from one lock-in position to the next
results in approximately 2x increase or 1/2x
decrease of the luminous intensity. The adjusting
knob cannot be turned past the grade limit stops A
and E.
Swinging in the additional optics ensures that the
use of fiber-optic light guides with lower beam
diameter still results in an even luminous illumina-
ted area.
Performing the illumination at the fiber-optics
output with imaging or focusing optical systems
results in a perfectly even illuminated area by
swinging out the additional optics.
Adjusting knob
Operation