Sirona ORTHOPHOS XG 3 DS, Руководство по обслуживанию

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59 38 399 D3352
D3352.076.01.13.02
07.2008
7 – 13
Tab 7 7.7 Checking the tube data
7.
7
7.7
Checking the tube data
7.7.1 kV actual value and radiation time
z
Select service routine S002.3 for the exposure (radiation without rotary
movement, radiation time selectable, see page 5-26) and set the following
parameters:
– Radiation time: 1 s
– kV value: 66 kV
z
Release radiation and check the kV actual value and radiation time spec-
trometrically, e.g. using a Mult-O-Meter.
If the measured values deviate from the values set above (1 s, 66 kV) by
more than ± 10 %:
‡
Replace the tube assembly (see Page 6-38)
NOTE
i
For the XG 3/3 PPE system version, sensor positioning must be performed un-
til the beam strikes the sensor precisely. If the sensor is positioned correctly,
the corresponding values can be compared with the setpoint values.
7.7.2 Tube current verification
WARNING
The electronics of the X-ray tube assembly are always connected to line volt-
age.
Always switch the X-ray unit off and wait until V203 is no longer illuminated be-
fore contacting the test leads.
WARNING
The test leads and measuring instruments used must have a dielectric
strength of at least 1000V!
Be sure to use a battery-powered measuring instrument with shock-hazard-
protected sockets.
Use only test leads with shock protection.
WARNING
Be sure to switch the X-ray unit off before removing the jumper for the mA
measuring jack.