User Manual
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SCAN OPTICS
SO-5800 MICROSCOPE USER MANUAL
SO-5800 Ophthalmic Microscope
User Manual
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CONTENTS INTRODUCTION
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MICROSCOPE FEATURES ---------------------------------------------------------------------------------- 4 Floor stand ---------------------------------------------------------------------------------------------- 5 Pillar ---------------------------------------------------------------------------------------------------------- 6 Lower panel ---------------------------------------------------------------------------------- 6 Power supply ---------------------------------------------------------------------------------- 7 Horizontal arm ---------------------------------------------------------------------------------- 9 Pantograph arm ---------------------------------------------------------------------------------- 10 Gas spring adjustment ---------------------------------------------------------- 11 Safety mechanism ---------------------------------------------------------------------- 12 X-Y unit ---------------------------------------------------------------------------------------------- 13 Microscope head assembly ---------------------------------------------------------------------- 15 Power system ---------------------------------------------------------------------------------- 16 Lighting system ---------------------------------------------------------------------- 16 Focus mechanism ---------------------------------------------------------------------- 17 Zoom mechanism ---------------------------------------------------------------------- 17 Viewing system ---------------------------------------------------------------------- 17 Tilt adjustment ---------------------------------------------------------------------- 19 Handles ---------------------------------------------------------------------------------- 19 Video system ---------------------------------------------------------------------------------------------- 20 Assistant microscope ---------------------------------------------------------------------- 22 Foot control ---------------------------------------------------------------------------------------------- 26 ROUTINE MAINTENANCE Changing the lamp ---------------------------------------------------------------------------------- 27 Changing mould protection pellets ---------------------------------------------------------- 28 Adjusting focus friction ---------------------------------------------------------------------- 30
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User Manual
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INTRODUCTION Please read the following information carefully before using the Scan Optics SO-5800 ophthalmic microscope. Scan Optics is responsible for the safety, reliability and performance of the equipment only if it is used in accordance with these instructions. This microscope is designed for use by a certified practitioner, for magnified observation of patients, and for use in an operating theatre as an observation aid during surgery. Environmental storage and packing conditions of 60-95% relative humidity and 10-40°C are recommended for this product. No parts or accessories supplied with this microscope are supplied in a sterile condition. Apart from those instructions within this manual, there are no user-serviceable parts in this microscope. Scan Optics will retain the discretion to advise whether any repairs may be taken out by external qualified technical personnel, or whether part(s) of the microscope must be returned to the manufacturer’s premises for service or repairs to be carried out under warranty or otherwise. Where appropriately qualified technical personnel are identified by a user, and ratified by Scan Optics, then Scan Optics will make available on request any information which will assist in repairing the equipment.
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MICROSCOPE FEATURES Please refer to the diagram below to help you identify the main assemblies of your SO-5800 microscope.
PANTOGRAPH ARM X-Y POSITIONING UNIT
HORIZONTAL ARM
MICROSCOPE HEAD ASSEMBLY
POWER SUPPLY
MONITOR
PILLAR
LOWER PANEL FLOOR STAND
FOOT CONTROL
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FLOOR STAND
The floor stand provides a stable platform for the microscope, enabling it to be moved freely and also to be locked in to position.
LOCK
UNLOCK
To move the floor stand, first fold the pantograph arms carefully back against the horizontal arm, and lock the arms to minimise the risk of accidental damage to the microscope head. Depress the latches marked on each of the legs in the diagram above to unlock the wheels. Then grip the handles on the side of the main pillar and move the floor stand as desired. To lock the floor stand depress the large black knobs as shown on the diagram. Note that no twisting of the knobs is necessary. To unlock the floor stand, simply depress the latches on each leg and the locks will spring up.
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PILLAR
The pillar contains two panels, a lower panel for connecting to mains power and the foot control, and a power supply panel for controlling microscope functions. LOWER PANEL
The foot control and IEC mains plug should be connected as shown in the diagram below. Note that the retaining clip should be used to avoid accidental removal of the mains plug. IEC MAINS INLET
FOOT CONTROL CONNECTION
RETAINING CLIP
When attaching the foot control cable, align the square feature on the plug with the recess on the panel socket. Insert the plug in the socket and rotate the housing clock-wise to secure the connection.
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POWER SUPPLY
The power supply controls some of the most important functions of the SO-5800 microscope.
3A CIRCUIT BREAKER MAINS SWITCH
7A CIRCUIT BREAKER
STANDBY INDICATOR STANDBY BUTTON
LAMP ON/OFF BUTTON LAMP ON INDICATOR
LAMP INTENSITY CONTROL BUTTONS FOCUS/ZOOM INDICATOR
LAMP INTENSITY INDICATORS
FOCUS/ZOOM SPEED CONTROL
X-Y INDICATOR X-Y SPEED CONTROL
To switch the microscope on, depress the mains switch. An indicator on the switch will glow, indicating that power is available. Press the standby button j once (the LED indicator will turn off) to allow microscope functions to be activated. Press the lamp button k once (the LED indicator will come on) to turn the lamp on. The lamp intensity may be controlled in five discrete steps by depressing the p or q buttons as appropriate, while the intensity setting will be displayed by the indicator LEDs. If the standby button is depressed (its LED
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indicator will turn on) the lamp will switch off, when the button is depressed again, the lamp will return to its previous intensity setting. Speed of X-Y movement and focus/zoom movement may be controlled by rotating the control knobs clock-wise to increase speed or counter-clock-wise to decrease speed. Note that at extremely low speed settings, movement may be imperceptibly slow or completely absent. The X-Y indicator will light up constantly when the foot control is used to position the microscope laterally. The indicator will flash when the return to centre function has been activated from the X-Y unit. The Focus/zoom indicator will light up constantly when the foot control is used to focus the microscope up or down, or to zoom the microscope in or out.
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HORIZONTAL ARM
The horizontal arm rotates about the top of the pillar and provides a connection interface for the main microscope power cable. Stops are fitted to prevent the arm rotating continuously around the pillar; this prevents the internal cabling from twisting. The range of movement allowed is 300°.
MICROSCOPE POWER CABLE
ELBOW FRICTION SHOULDER LOCK
The knob at the top of the pillar labelled ‘SHOULDER LOCK’ enables the horizontal arm to be fixed in position. To lock the arm, rotate the knob in clock-wise fashion. To connect the microscope power cable to the socket marked ‘MICROSCOPE POWER OUT’ align the square feature on the plug with the recess on the panel socket. Insert the plug in the socket and rotate the housing clock-wise to secure the connection. A knob marked ‘ELBOW FRICTION’ is provided beneath the end of the horizontal arm and allows friction to be applied to the swivel joint between the pantograph arm and the horizontal arm. To increase friction, rotate the knob in clock-wise fashion when viewed from beneath the horizontal arm. Issue number 2.0
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PANTOGRAPH ARM
The pantograph arm rotates about the end of the horizontal arm and also provides a means for manually raising and lowering the microscope head. The pantograph arm includes features that enable the user to achieve the required type and feel of microscope movement.
ROTATION LOCK
ARM LOCK
SAFETY SET KNOB
GAS SPRING ADJUSTER
To lock the arm in a particular vertical position, simply rotate the ‘ARM LOCK’ knob clock-wise. To lock the rotational movement of the X-Y unit and microscope head below the end of the pantograph arm, rotate the ‘ROTATION LOCK’ knob clock-wise.
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GAS SPRING ADJUSTMENT
A gas spring inside the pantograph arm provides lifting force, which is able to support the weight of the X-Y unit and microscope head at the end of the arm. By moving the end position of the gas spring, the amount of lifting force can be varied depending on the preference of the user or to suit the weight of additional accessories which may be placed on the microscope head assembly.
TO INCREASE LIFTING FORCE ROTATE KNOB CLOCK-WISE TO MOVE END POSITION DOWN
TO DECREASE LIFTING FORCE ROTATE KNOB COUNTER-CLOCK-WISE TO MOVE END POSITION UP
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SAFETY MECHANISM
The SO-5800 is fitted with a safety stop mechanism that enables the user to preset a particular height below which the pantograph arm will not move. Where the knob position is set closest to the horizontal arm end, there is no impediment to movement. When the knob is locked closest to the microscope head end, there will be almost no movement allowed in the pantograph arm below its rest (UP) position. Locations in between will allow a limited rage of movement. Note that the knob MUST be locked in position for the safety mechanism to take effect.
UNLOCK KNOB
PUSH KNOB IN
SLIDE INTO POSITION
LOCK KNOB
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X-Y UNIT
The X-Y unit is positioned below the rotating joint at the end of the pantograph arm. This unit allows the user to move the microscope head laterally, by means of the joystick on the foot control. To move the head to the right, simply move the joystick to the right, to move the head forward, move the joystick forward, and so on. Movement combinations may also be achieved by moving the joystick diagonally. Speed of X-Y movement is controlled using the knob on the main power supply panel. The X-Y unit also acts as an interface for distributing power to the microscope head and video camera as well as the X-Y unit itself. These connections are labelled on the rear panel of the X-Y unit. All voltages in this region are <15Vdc
X-Y UNIT REAR PANEL RETURN TO CENTRE SENSITIVITY ADJUSTMENT
HEAD POWER OUT CONNECTION
MICROSCOPE POWER IN CONNECTION
VIDEO CAMERA POWER OUT CONNECTION
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A return to centre (RTC) function built in to the X-Y unit allows the user to return the microscope head to a home position, centred on the middle of the range of movement. To activate this function, move a hand or object close to the small circular window on the front panel of the X-Y unit. The RTC function will activate after approximately two seconds, to prevent accidental activation. The LED above the window will flash intermittently while the unit is returning to centre. This LED will also provide a continuous light when the joystick on the foot control is used to drive the head in normal fashion.
X-Y UNIT FRONT PANEL LED SENSOR WINDOW
The return to centre function is activated when light is blocked from entering through the sensor window by the user’s hand or another object. The sensitivity of this detector may be adjusted by rotating the knob on the rear panel of the XY unit. The ideal setting is such that the user need not touch the window but the sensitivity is not so fine as to cause nuisance activation. This sensitivity may need adjustment if the ambient lighting conditions where the microscope is used have changed. If the microscope is used in darkened conditions, it is recommended that the RTC function is turned off by adjusting the sensitivity, to prevent accidental engagement. The sensitivity knob itself may then be used to return the microscope to centre. Note that on some model SO-5800 microscopes this sensitivity is adjusted by inserting a Philips head screwdriver through a hole in the upper housing of the X-Y unit. In this case the screwdriver engages in a trim pot which may be rotated, otherwise the effect is identical. Issue number 2.0
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MICROSCOPE HEAD ASSEMBLY
The microscope head is suspended beneath the X-Y unit by means of a rigid bracket, which is clamped at each end. The head assembly includes viewing optics, light source and various fittings and mechanisms to aid the user in positioning the microscope.
MICROSCOPE HEAD ASSEMBLY LEFT SIDE VIEW
SUSPENSION BRACKET VIDEO CAMERA ASSEMBLY MANUAL ZOOM KNOB LAMP HOUSING LOCKING PIN FIXED EYEPIECE
MANUAL FOCUS KNOB SPARE LAMP MODULE
ADJUSTABLE EYEPIECE
GUIDE HANDLE
TILT ADJUSTMENT KNOB SIDE HANDLE
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LIGHT DELIVERY PRISM
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MICROSCOPE HEAD ASSEMBLY RIGHT SIDE VIEW LAMP POWER CABLE COOLING FAN
LAMP MODULE
HEAD POWER CABLE
CONNECTOR BLOCK
ZOOM POWER CABLE ZOOM DRIVE COVER
LOCKING PIN
SIDE HANDLE
FOCUS DRIVE COVER POWER SYSTEM
Power to the head is delivered from the X-Y unit in to a connector block, which distributes power to the various systems. All power in this region is < 15Vdc. The lamp power cable connects the lamp housing to the connector block and provides voltage for the halogen lamp and its cooling fan. Power is also provided to the zoom drive motor and internally to the focus drive motor. LIGHTING SYSTEM
A lamp housing provides a means for mounting a 50W halogen lamp, which delivers light to the viewing field through a series of lenses, filters and a prism. The lamp is supplied fixed in a holder, which is then mounted in a module – this ensures that the amount of light delivered is maximised. The cooling fan enables the lamp to be run at maximum intensity if desired without heating the housing to extreme levels. The prism is positioned to optimise red reflex – this means that the prism tip may be visible when the viewing field is maximised, that is at the lowest magnification settings.
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FOCUS MECHANISM
A geared dc motor provides the means for driving the head assembly up and down for focussing via foot control. The motor is located inside the focus drive cover. Focus speed may be adjusted by rotating the knob on the main power supply panel. The manual knob located on the left side may be used instead of the foot control, if this is a preference of the user or in the event of a power failure. In this case the manual knob will simply drive the motor. When using the manual focus knob, do not attempt to drive the focus using the foot control – this will strip the drive gears. The range of focus movement is approximately 45 millimetres. A visual guide to the centre of the focus range is provided in the form of black dots marked on the side of the focus mechanism. When the dots are aligned, the focus system is set to the centre of the range. ZOOM MECHANISM
The zoom mechanism can also be driven by foot control or by using the manual zoom knob on the left side of the microscope head. A geared dc motor located inside the zoom cover provides the means for foot controlled zooming. When using the manual zoom, the manual knob will simply drive the motor. Do not attempt to drive the zoom simultaneously using the foot control and the manual knob. This will strip the drive gears. When the standard 0.62x objective lens is used with this microscope, the range of magnification controlled by the zoom mechanism is between 4x and 25x. VIEWING SYSTEM
The optical head provides the means for viewing the subject matter under magnification. There are adjustments available to suit the user in order to achieve the clearest image in the most comfortable circumstances. The pupillary distance (PD) may be adjusted manually by sliding one eyepiece sideways – the other eyepiece will move simultaneously in the opposite direction. On microscopes fitted with the optional PD adjuster, this is achieved by rotating the knob that protrudes to the side of the eyepieces. The adjustable eyepiece may be used to compensate for any refractive error difference between the left and right eye of the user. First, rotate the adjustable (left) eyepiece so that the scale is set to zero. Then focus the microscope while closing the left eye and looking only through the right eyepiece. When the microscope is focussed, close the right eye and look with the left eye through the left eyepiece, and rotate the adjusting ring until the left eye is focussed. Rubber eyepiece shields are provided to help the user view through the eyepieces without being disturbed by ambient light. These shields are easily removed or added by hand, and can be reversed to provide an aid to spectacle wearers.
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Eyepiece caps are provided to protect dust entering the eyepiece tubes when the microscope is not in use. Simply remove the eyepieces and replace them in their protective wrapping, and insert the eyepiece caps in their place. The working distance is fixed at 180 millimetres, where the standard 0.62x objective is supplied. The working distance can only be adjusted by swapping the objective lens to that of another magnification.
REFRACTIVE ERROR ADJUSTMENT
MANUAL PD ADJUSTMENT
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TILT ADJUSTMENT
The entire head assembly may be tilted some five degrees forward or up to forty five degrees back by rotating the tilt adjustment knob located beneath the suspension bracket. This can be of some assistance to users of a shorter stature who wish to use the microscope while seated. Note that on some models, the tilt knob is located in front of the bottom end of the suspension bracket, and not below it. HANDLES
The SO-5800 is provided with two side handles and a front guide handle which enable the user to manoeuvre the microscope into position, within the limitations of the settings of the various locking knobs. The front guide handle may be removed if desired by unscrewing the socket head cap screw that fixes it to the front of the microscope head mounting bracket. The side handles may be removed first by removing the locking pins then sliding the handles out. It is necessary to remove one side handle if the assistant microscope is to be mounted on the side of the microscope head assembly. Note that sterilisable covers are provided which fit the side/guide handles, as well as covers for the manual zoom and focus knobs, and the PD adjuster knob, if fitted. This enables the user to use the microscope in a surgical environment, if the covers are sterilised correctly.
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VIDEO SYSTEM
The SO-5800 microscope comes fitted with a video system enabling images from a coaxial video camera to be displayed on a monitor mounted from the main pillar. The SO-5800 can thus be used as a teaching microscope, or the monitor used simply to display surgery for the benefit of theatre staff. The SO-5800 is shipped with camera and video settings pre-set to suit local conditions. These settings can however be adjusted to suit user preferences. For a detailed reference to the settings available for camera and monitor, please refer to the separate instructional leaflets provided which contain all relevant information. CAMERA POWER CONNECTION
VIDEO SIGNAL OUT BNC CONNECTION
WHITE BALANCE ADJUSTMENT WHITE BALANCE SWITCH SHUTTER SWITCH
FOCUS ADJUSTMENT
To connect the video system, first connect the video signal cable between the camera and the monitor. First pass the cable through the clip on the side of the X-Y unit. Rotate the right-angled connector at the camera end to ensure that the cable does not interfere with the upper end of the focus range due to the proximity of the X-Y unit. Then simply connect the camera power cable between the camera and the X-Y unit, and connect the monitor power cable between the monitor and the connector on the back of the main pillar.
Issue number 2.0
Reference SO-5800-UM-2