Kv-Verification - Sirona Orthophos 3 Maintenance Manual

Maintenance Instructions
1.
I
O
3.
kV – Verification, kV–ramp
• During exposure the kV is encreased in the central region depending on kV/mA selected up to 12%.
This increase can be measured in VDC.
1. Remove metal cover (2 screws).
2. Connect digital voltmeter to KV+ and KV– and select range 20 VDC.
3. Switch unit ON. Wait 1 min. for self-adjustment of the unit.
4. Press return R key to return the X-ray head into the initial position.
5. Remove and reinsert the film cassette.
6. Select P1 program and 72kV/10mA at the Multitimer. LED above R key on Multitimer must be off.
7. CAUTION RADIATION! - Depress the exposure button until the exposure terminates automatically.
The following values must be obtained – see also diagram on next page.
• Turn unit OFF and remove meter leads.
• If specified values cannot be obtained, see Service Manual, "Radiograph Density in Central Region
Incorrect"
8
4.– 7.
For details
see Operating Instructions.
during panoramic exposure
up to 4.1 seconds:
from 4.9 to 6.5 s:
after 7.3 seconds:
com.
KV– KV+
KV –
7.2 V ±0.5V,
7.9 V ±0.5V,
7.2 V ±0.5V.
Sirona Dental Systems GmbH
2.
20VDC
KV+
59 01 603 D3285
D3285.103.04.02.02