Exposure Time Verification - Sirona Galileos Maintenance Instructions Manual

Sirona Dental Systems GmbH
Maintenance Instructions GALILEOS
7

Exposure Time Verification

2.
Pulse counter
T1
DANGER
The electronics of the X-ray tube assembly are always
connected to line voltage.
Always switch the X-ray unit off and wait until V203 is
no longer illuminated before contacting the test leads.
CAUTION
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.
61 16 813 D3437
D3437.103.01.04.02
to N
to L
of 200-240VAC,
50Hz/60Hz
power receptacle
T2
400 VDC
PC board DX6
3.
➊
➊
A
1. Be sure power is disconnected at the central distribu-
tion panel!
2. Connect...
T2
– test point of terminal on PC board DX6 to
200V-240V power receptacle
– the common lead of the pulse counter to
200V-240V power receptacle
– the second measuring lead of the pulse counter to
T1
test point
Switch unit ON ➊ and wait 1 minute.
3.
Press key R to return X-ray tube head to the initial
position.
7 Exposure Time Verification
Prog. kV mAs
T R
L
N
of the
of
15