Canon Canonet 1 Service Manual page 73

6. HOW TO USE
6. 1. Place the Inspection Device for Canon Meter on a flat table where no direct rays of the sun -fall intensely.
6. 2. Make sure that switches for the light source and for the fan are both OFF and the voltage control handle is
turned full to the left.
6. 3. Connect the cord to power supply.
6.4. When the switch for the fan is put to ON, the fan works and the signal lamp is lighted at the same time.
6. 5. Put the switch for light source to ON.
6.6. If you turn the voltage control handle slowly from ihis side to the opposite (right way round), the light source
gradually becomes brighter.
Making it properly bright, measure the accuracy of Canon Meter according to the directions below
6. 7. Measure 1
Set the film speed at ASA 100, shutter speed 1/8 and the aperture ring AUTO.
Turn the time ring to th-a letter T.
Place the meter window equally to the center of the Opal Glass of the Inspection Device.
Boost voltage to the value indicated on the Data Sheet, Term 1, by turning the handle.
(For Reference: The brightness in this case is approximately LV 8, using ASA 100 film.)
Press the shutter button.
Detach the camera from the Inspection Device, watch the diaphragm from the back of the camera opening the
hinged back and examine how the aperture' works, following the directions below:
Turn the aperture ring slowly and check the point where the diaphragm begins to work, consulting the calibrated
scales on the aperture ring. The aperture should show the value between F4 and F8.
Be sure to return the aperture ring to AUTO after measuring.
6. 8. Measure 2
Repeat the same measure with ASA 100 and 1/125, on the condition indicated on the Data Sheet, Term 2.
(For Reference: The brightness in this case is approximately LV 12, using ASA 100 film.)
The aperture should show the value between F4 and F8.
Be sure to return the aperture ring to AUTO after measuring.
6. 9. Measure 3
Repeat the same measure with ASA 100 and 1/500, on the condition indicated on the Data Sheet, Term 3.
(For Reference: The brightness in this case is approximately LV 14, using ASA 100 film.)
The aperture should show the value between F4 and F8.
Be sure to return the aperture ring to AUTO after measuring.
Fig. 1
2