Siemens PORTARAY HELIODENT 70 Maintenance Instruction page 51

Make an exposure
=P OL
During the exposure the radiation
will be visible on the fluorescent
screen.
At the same time, the red radiation
indication lamp at theDENTOTIME
must light up, simultaneously au-
dible sound is present.
Fluorescent
screen
y
N
「
=>
レコ
レコ
し Fig.70
If no X-rays are present but all visual and audible indicators are functional, make electrical measurement
as follows.
See