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ALERTS / TROUBLESHOOTING
The following operational tests are carried out with the PORTARAY
in a ready to ope-
rate condition.
1. Testing of the deadman feature
The deadman feature permits the premature immediate termination of X-rays.
e Set the object/exposure time selector to 3.2 seconds.
e Cover the collimator with cover cap (leaded) No. 58 83 194 (Radiation protection).
2. Operational conditions indicating improper timer function
Select the shortest exposure time 0.066.
>
A
Make an exposure. Caution radiation.
!
Observe the red radiation emission light (visual) and audible signal.
Select the shortest exposure time 0.066.
Make an exposure. Caution radiation.
p
Observe the red radiation emission light(visualland audible signal.
Both must come on and terminate simultaneously in very short order.
In the event both indicators come on together but the exposure time is noticeably longer
(0.7 to 1.0 second), expose a periapical film. Develope same.
If the radiograph is blank (transparent) the X-ray head needs replacement.
If the radiograph is black the X-ray head is ok. The trouble is in the scissor arm wiring.
Call a qualified technician to repair or replace the X-ray head and/or the scissor arm.
SIEMENS
ΡΕΝΤΟΤΙΝΜΕ
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=
=
Fig.18
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