4.4 Ensuring the Right Exposure Time Is Set
Patient
Receptor
Tooth
When power is turned off, the most recent setting for the exposure time
is stored in memory and
redisplays when power is turned back on.
However, if the battery is replaced, the display is reset to the default
value.
To change exposure settings press
each of the button options to
toggle through the choices:
1) the
Patient Size
(larger or smaller),
2) the
Image Receptor
(film, phosphor plate, or sensor), and
3) the
Tooth Group
(molars, pre-molars, or incisors/canines).
Examples from factory default settings:
Smaller, Sensor, and Incisor/Canines = 0. 12sec OR Larger, Film,
0.12 sec…
0.40
sec.…
Examples
Increase
Decrease
When necessary, use the
Increase
or
Decrease
buttons to adjust the time
in 0.01 second increments. Adjusted exposure settings may be saved,
replacing factory settings (see Section 4.10, Technique Factor Settings
and Adjustments).
4.5 Ready the Device
To prevent accidental radiation exposure, properly position patient and
operator before readying the NOMAD Pro.
Press and release the trigger once to ready the device. The device will
briefly display an
ENABLING X-RAYS
message before indicating
READY
.
NOTE:
As a safety precaution, if the trigger is held longer than 1
second or pulled a second time while still in the
ENABLING X-RAYS
state,
the devise will not transition to the
READY
state. (This is to prevent an
accidental activation of the device by unintended triggering.)
ENABLI
NG X-
RAYS
green
The illuminated green LED, the message
READY
on the display panel,
and a double tone ;Òalert confirm that NOMAD Pro is prepared to fire
X-rays. The
READY
state continues until either an exposure is initiated
or timeout occurs after 15 seconds of inactivity (accompanied by a
double tone ;Òand the return to the Settings mode).
While the device is in the
READY
state, any changes to the settings
(pressing any user interface panel button) will end the state.
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