Canon Cr-2 User Manual

							7 Troubleshooting
41
Symptom Cause and remedy 
Cannot capture good images.  The patient's pupil is not dilated enough. Dilate the patient’s 
pupil. If the pupil is still too small, enable the small pupil 
photography function. 
The retinal camera and the eye are not aligned. Align them 
correctly. 
Focus the image. 
Eyebrows or eyelashes are blocking the pupil. Instruct the 
patient to open their eye wider. 
The patient's eye is cloudy. Clear images cannot be captured if 
this is the case. 
Adjust the flash intensity, patient's diopter, and small pupil 
photography function. 
The objective lens is dirty. Clean the objective lens (see page 35). 
The patient is wearing contact lenses. Instruct the patient to 
remove their contact lenses. 
Black spots or any artifacts 
appear in the same place in every 
captured image.  There is dirt or dust on the objective lens. Clean the objective 
lens (see page 35). 
Dirt or dust is stuck to the imaging sensor of the digital camera. 
Use the self-cleaning sensor unit to clean it. (see page 36). 
White spots are visible on the 
captured image.  The objective lens is dirty. Clean the objective lens (see page 35). 
The patient's eyelashes are interfering with the image. Instruct 
the patient to open their eye wider, and capture another image.   
						

							42
Specifications 
Field angle45°
Photographic magnification 1.1 x (image size on the sensor) 
Required pupil diameter  4.0 mm or greater (3.3 mm when using small pupil photography 
function) 
Working distance  35 mm 
Focus adjustment range  –10 to +15 D (without compensation lens) 
–31 to –7 D (when using negative compensation lens) 
+11 to +33 D (when using positive compensation lens) 
(Split-line alignment type focusing) 
Flash intensity Linked to the photography mode 
Can be set manually 
Light source 
  Observation light source  Infrared LED 
  Flash source  White LED 
Camera  Digital camera 
Eye fixation lamp Internal eye fixation lamp (LED) 
External eye fixation lamp (sold separately) 
Range of motion 
  Stage  100 mm side to side, 70 mm front to back 
    Main unit vertical 
movement  32 mm 
Chin rest range of motion  60 mm 
Power supply rating  AC 100 V to 240 V, 50/60 Hz, 1 A to 0.4 A 
Dimensions  305 (W) × 500 (D) × 473 (H) mm
Weight  Approximately 15 kg (including 0.8 kg digital camera) 
 
Appendix  
						

							Appendix
43
EMC (Electromagnetic Compatibility)
This instrument conforms to the EMC standard IEC 60601-1-2.
Guidance and Manufacturer’s Declaration for Electromagnetic Emission
The CR-2 is intended for use in the electromagnetic environment specified below.
The customer or the user of the CR-2 should assure that it is used in such an environment.
Emission TestComplianceElectromagnetic Environment – Guidance
RF emissions CISPR11 GROUP 1The CR-2 uses RF energy only for its internal 
function. Therefore, its RF emissions are very low 
and are not likely to cause any interference in nearby 
electromagnetic equipment.
RF emissions CISPR11 Class B
The CR-2 is suitable for use in all establishments, 
including domestic establishments and those directly 
connected to the public low-voltage power supply 
network that supplies buildings used for domestic 
purposes.
Harmonic emissions
IEC 61000-3-2 Class A
Voltage fluctuations/flicker emissions IEC 61000-3-3 Complies  
						

							44
Appendix
Guidance and Manufacturer’s Declaration for Electromagnetic Immunity
The CR-2 is intended for use in the electromagnetic environment specified below.
The customer or the user of the CR-2 should assure that it is used in such an environment.
Immunity TestIEC 60601
Test Level Compliance Level
Electromagnetic Environment – Guidance
Electrostatic discharge 
(ESD)
IEC 61000-4-2 ±(2, 4, 6) kV contact
±(2, 4, 8) kV air
±(2, 4, 6) kV contact
±(2, 4, 8) kV airFloors should be wood, concrete or ceramic 
tile.
If floors are covered with synthetic material, 
the relative humidity should be at least 30%.
Electrical fast transient/
burst
IEC 61000-4-4 ±2 kV for power supply 
lines
±1 kV for input/output 
lines±2 kV for power supply 
lines
±1 kV for input/output 
lines
Mains power quality should be that of a 
typical commercial or hospital environment.
Surge
IEC 61000-4-5 ±1 kV differential mode
±2 kV common mode±1 kV differential mode
±2 kV common mode
Mains power quality should be that of a 
typical commercial or hospital environment.
Voltage dips, short 
interruptions and 
voltage variations on 
power supply input 
lines
IEC 61000-4-11 95% dip in 
U
T) for 0.5 cycles
40% U
T (60% dip in UT) 
for 5 cycles
70% U
T (30% dip in UT) 
for 25 cycles
95% dip in 
U
T) for 5 sec 95% dip in 
U
T) for 0.5 cycles
40% U
T (60% dip in UT) 
for 5 cycles
70% U
T (30% dip in UT) 
for 25 cycles
95% dip in 
U
T) for 5 sec Mains power quality should be that of a 
typical commercial or hospital environment. 
If the user of the CR-2 requires continued 
operation during power mains interruptions, 
it is recommended that the CR-2 be powered 
from an uninterruptible power supply.
Power frequency 
(50/60Hz) magnetic 
field
IEC 61000-4-8 3 A/m
3 A/mPower frequency magnetic fields should be 
at levels characteristic of a typical location in 
a typical commercial or hospital environment.
NOTE:  U
T is the a.c. mains voltage prior to application of the test level.  
						

							Appendix
45
Guidance and Manufacturer’s Declaration for Electromagnetic Immunity
The CR-2 is intended for use in the electromagnetic environment specified below.
The customer or the user of the CR-2 should assure that it is used in such an environment.
Immunity TestIEC 60601
Test Level Compliance Level
Electromagnetic Environment – Guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3 3 Vrms
150 kHz to 80 MHz
3 V/m
80 MHz to 2.5 GHz3 Vrms
3 V/mPortable and mobile RF communications 
equipment should be used no closer to any 
part of the CR-2, including cables, than the 
recommended separation distance calculated 
from the equation applicable to the frequency 
of the transmitter
Recommended Separation Distances
d = 1.2 √P
d = 1.2 √P 80 MHz to 800 MHz
d = 2.3 √P 800 MHz to 2.5 GHz
where P is the maximum output power rating 
of the transmitter in watts (W) according to 
the transmitter manufacturer and d is the 
recommended separation distance in metres 
(m).
Field strengths from fixed RF transmitters, 
as determined by an electromagnetic site 
survey
a, should be less than the compliance 
level in each frequency rangeb.
Interference may occur in the vicinity of 
equipment marked with the following symbol:
NOTE 1:  At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2:   These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and 
reflection from structures, objects and people.
a  Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile 
radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. 
For assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be 
considered.
  If the measured field strength in the location in which the CR-2 is used exceeds the applicable RF compliance level 
above, the CR-2 should be observed to verify normal operation. If abnormal performance is observed, additional 
measures may be necessary, such as reorienting or relocating the CR-2.
b  Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.  
						

							46
Appendix
Recommended Separation Distances between Portable and Mobile RF 
Communications Equipment and Devices or the CR-2
The CR-2 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled.
The customer or the user of the CR-2 can help prevent electromagnetic interference by maintaining a minimum distance 
between portable and mobile RF communications equipment (transmitters) and the CR-2 as recommended below, 
according to the maximum output power of the communications equipment.
Rated maximum output power of transmitter W Separation distance according to frequency of transmitter
m
Conducted RF Radiated RF
150 kHz to 80 MHz d = 1.2 √P 80 MHz to 800 MHz
d = 1.2 √P 800 MHz to 2.5 GHz
d = 2.3 √P
0.01 0.12 0.120.23
0.1 0.38 0.38 0.73
1 1.2 1.22.3
10 3.8 3.8 7.3
100 12 1223
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in metres (m) 
can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power 
rating of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1:  At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE 2:   These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and 
reflection from structures, objects and people.
NOTE 1:    To maintain the optimum EMC performance, do not use cables other than supplied, nor extend the cable lengths 
more than specified.
Name TypeLengthRemarks
AC Power Cord Non-Shielded 3.0 m fixed-lengthSupplied
USB Cable Type AB connector plug supporting USB 2.0 
Hi-Speed Max. 3.0 m
Not supplied
NOTE 2:  Do not install the CR-2 adjacent to or stacked with other electric/electronic equipment.
NOTE 3:  Electromagnetic
•	 No unintentional raise/lower movements of Chin Rest shall occur.
•	 No unintentional flashing shall occur.
•	 No degradation of Photographic quality, which could lead erratic diagnose.
•	 No change in operation status, or stored data.  
						

							Appendix
47
Warranty and Repair Service 
Service life 
The service life of this product is eight years if specified inspections and maintenance are done. 
About repairs 
If a problem cannot be solved even after taking the measures indicated in “7 Troubleshooting” (see 
page 40), contact the Canon representative or distributor from whom you purchased the CR-2 for 
repairs. 
When requesting repair, please provide us with the following information. 
Name of the instrument: CR-2 
Serial number: 6-digit number on the rating label 
Description of malfunction: Report as much detail as possible. 
Time limit for supplying performance parts for repair 
Performance parts (parts for repairs to maintain performance) will be stocked for eight years after 
production of the CR-2 is discontinued.
Expendable parts replaced by service personnel 
The following parts are consumable or may deteriorate because of characteristics of their material or 
construction. 
These parts cannot be replaced by the user. If these parts are found to be worn out or to have 
deteriorated during daily or regular inspection, contact the Canon representative or distributor from 
whom you purchased the CR-2 for repairs. •	 Baseboard (USB connector)   
						

							CANON INC. Medical Equipment Group
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Telephone: (81)-3-3758-2111
CANON U.S.A., INC.
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Telephone: (65)-6799-8888
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Telephone: (61)-2-9805-2000
L-IE-5176 1010P0.001© CANON INC. 2010 Printed in Japan
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