b.
Choosing default exposure: The control will default the program of Large Patient Group 1. At
this time you can push Large Patient button to choose the tooth group. The indicating led will be
showing your choice. For Small Patient, the operation is the same as above, using the proper
button
a.
Choose the low-speed film(D),high-speed film(E/F) or digital sensor (RVG) with “FILM” key .
The pre-set is “E/F” and the indicator LED will light on. Different films type and brand could have
different radiograph results. The user can adjust the exposure time according to it´s dental film
Dental X-Ray Unit
Z70
70kVp - 7mA
7
Follow the instructions below:
1.
Turn on the main switch under the Box Timer
2.
Adjust the position of tubehead and the direction of beam limiting device
3.
Choose on the handheld control, the exposure option: pre-programmed or manual use and so,
prepare the exposure, according the parameters below:
3.2. Equipment Operation
f.
The display segments will blink after the exposure. Push any button during this period will be
invalid. This period is for the X-Ray tube cooling time. The blinking time will be 30 times of
exposure time (1/30 duty cycle).
g.
Put back the handheld control at the support.
d.
Taking the timer control, choose and set a position according the patient and the use necessity.
Once adjusted, push the exposure button, keeping pressed until the end of the X-Ray exposition
time
e.
During the X-Ray exposure period, the yellow LED and the buzzer will be indicating the X-Ray
exposure.
c.
Exposure time selection: There is a 0.32 sec default exposure time for films mode and 0.06 sec
for RGV mode. If does not meet the use request, it can be adjusted with manual mode, using the
buttons “time UP (2)”and “time DOWN (3)”, adjustable between 0.06sec and 2.50 sec.
Follow the time table below:
Note: To access the function´s with the button “SET”, press it during 5 seconds to current
net voltage and Software Version.
Note*¹:. Using the RVG mode, when necessary the times adjustment, it should be made in a manual way through the time buttons
Dose*²: It is a Guideline, based in a found average of Z70 acting.
Handset Manual Times (sec.)*¹ and Doses (mR)*²
Time 0.06 0.08 0.10 0.12 0.16 0.20 0.28 0.32 0.35 0.40 0.45 0.50 0.56
Dose 26
35
43
54
72
90
139 156 167 202 237
264
291
Time 0.63 0.71 0.79 0.89 1.00 1.12 1.26 1.41 1.58 1.78 2.00 2.24 2.50
Dose 329 370 408 475 538 610 678 747 842 949 1060 1200 1327
WARNING:
During the exposure, the X-Ray button must be kept pressed until the end of the exposition. If the
patient move during the X-Ray, the button must be released, thereby, interrupting the emission.
During the process of exposure ,the yellow LED on the control panel will be illuminated and the
buzzer will be beeping. This means the X-Ray is radiating .If it find any alarm code during this
procedure, refer at the Appendix 3.2 for the resolution.
WARNING:
Operation Manual
