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....

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...

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,...

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...

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...

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...

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...

CANON INC. Medical Equipment Group
30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo, Japan
Telephone: (81)-3-3758-2111
CANON U.S.A., INC.
CANON MEDICAL SYSTEMS Eye Care Systems Department
15975 Alton Parkway, Irvine, CA 92618, U.S.A.
Telephone: (1)-949-753-4000
CANON EUROPA N.V. Medical Products Division
Bovenkerkerweg 59-61, 1185 XB Amstelveen, The Netherlands
Telephone: (31)-20-545-8926
CANON SINGAPORE PTE. LTD. Medical Equipment Products Division
1 HarbourFront Avenue, #04-01 Keppel Bay Tower, Singapore...