Myray RX DC, Manual

Page: 69 / 309

EN OPERATOR'S MANUAL
69
4.4. SETTING THE EXPOSURE MODE AND TIME
The exposure parameters are set by following the directions given below::
1) Select the tooth to be examined
2) Select the patient size
The exposure time is automatically shown on the handheld screen.
NOTE: Each tooth and patient size selected is displayed for approximately 1 second according to the
operating mode (En60, En63 or En65) used.
The suggested exposure time can be changed with keys and . Exposure times ranging from 0.01s and
1.00s belonging to the R’20 scale can be set. Random exposure times different from the ones provided in the R’20
scale cannot be set.
When the exposure time displayed differs from the default setting, icon comes on.
To save the new setting, make sure icon is on and then press and hold down key for approximately 2
seconds. The handheld will beep to confirm the setting has been saved. At this point, make sure icon is off.
NOTE: If the exposure time is not saved, the change made will be lost after a new entry or as soon as the
handheld changes over to stand-by.
WARNING:
After customized settings have been made, the “Original exposure values charts” are no longer valid.
If icon is displayed while the exposure time is changed, it means the set time cannot be saved for the selected
tooth-patient size combination. In any case, the x-rays can be taken with the set time.
WARNING:
When the suggested exposure time is changed, the sensitivity factor is also modified (by default set to
F=19). Once this change has been saved, it is applied to all the teeth and both patient sizes.