Sirona Heliodent Maintenance instruction

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Maintenance Instructions Sirona Dental Systems GmbH

ATTENTION!

Adequate lead proofing of room and operator position is
essential.
Since these requirements vary from state to state it is the
assembler's / installer's responsibility that all local radiation
safety requirements are met.

2 41 62 983 D 3202.101.01.06.02

Sirona Dental Systems GmbH Maintenance Instructions

General

In order to ensure in compliance with the DHHS requirements the HELIODENT®DS must be maintained
annually following date of installation. It is the responsibility of the user to ensure that the equipment is main­tained in accordance with the manufacturer's recommended Maintenance Instructions to ensure compli­ance with the Federal Performance Standard.

The manufacturer and the assembler/installer are not responsible for disturbances in operation when the
equipment is not used in accordance with the operating instructions.
The maintenance inspection and consequent service must be accomplished by a skilled technician.
Neither the inspection nor service is part of the equipment warranty.

Technical instructions required

Operating Instructions and Service Manual

Instruments required

1. Digital multimeter model FLUKE 8000 A, or equivalent
Accuracy: AC voltage ± 0.5% of reading plus 1 digit

DC voltage ± 0.1% of reading plus 2 digits
DC current ± 0.3% of reading plus 1 digit

2. Electromechanical pulse counter,
model KESSLER ELLIS KT 203 ±1 pulse, or equivalent

CAUTION RADIATION

Observe radiation protection guidelines as outlined in the Operating Instructions!

ESD

CAUTION Technician!

PC-boards are fitted with electronic components sensitive to electrostatic discharge (ESD).
Electrostatic discharge is unavoidable due to friction of clothing, carpeting etc.

ATTENTION

To prevent damage of electronic components do not touch same.
Discharge your electrostatic energy by touching a grounded point.

Always handle circuit boards by the edge of same.

List of Contents

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Visual Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Light Indicators at the Multitimer Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Tube Current Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Exposure Time Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Verification of the Exposure Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Verification of the Object Selector Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Mechanical Adjustments (if required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Yearly Maintenance Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . appendix

41 62 983 D 3202.101.01.06.02 3

Maintenance Instructions Sirona Dental Systems GmbH

Röhre / Tube
Siemens SR 60 / 70 / 7 L

Cone / Tube

Model-No. 33 14 742 D 3302

Serial-No

This product complies with DHHS
regulations 21 CFR Subchapter J
applicable at date of manufacture.
Date of

manufacture:

Siemens Aktiengesellschaft

Wittelsbacherplatz 2

D-80333 München Germany

Model-

46 81 974 D 3302

No.
Serial-

No.

Model-

46 84 606 D 3302

No.
Serial-

No.

MADE IN GERMANY

12”

Model-No. 33 43 741 V 1034

Serial-No. . . . . . . . . . . . . . .

 0.7 IEC 336 / 82

or

Röhre / Tube
Petrick P470/6.30/12G
Model-No. 60 91 651 D3302

Serial-No. . . . . . . . . . . . . . .

 0.4 IEC 336 / 82

Model-No. 46 81 263 D 3302

Serial-No

This product complies with DHHS
regulations 21 CFR Subchapter J
applicable at date of manufacture.
Date of

manufacture:

Siemens Aktiengesellschaft

Wittelsbacherplatz 2

D-80333 München Germany

Generator Electronic 33 13 900 D3302

Serial-

No.

This product complies with DHHS regulations 21
CFR Subchapter J applicable at date of
manufacture:

Sirona Dental Systems

Fabrikstraße 31

D-64625 Bensheim Germany

Visual Check

• Look for mechanical damage, possibly affecting radiation safety.

• Inspect cone for possible cracks.

• Check the mechanical functions.
Test the tubehead in all working positions for possible drift.

• Verify that all labels are affixed and legible.
Defaced labels must be replaced.
To order the above, write to Sirona Dental Systems (address, see rear)
giving details on: Customer Name

Customer Address
All Model Numbers with

Serial Numbers still legible on the unit for identification purposes.

For serial numbers see also Unit Passport.

4 41 62 983 D 3202.101.01.06.02

Sirona Dental Systems GmbH Maintenance Instructions

Radiation
indication

X-ray

Standby indicator lamp
(Ready LED)

D

X-ray

LED

ON

Remote control

0I

OFF

I.00

X-ray

ATTENTION RADIATION
Observe
Radiation Protection Guidelines.

See Operating Instructions.

S

D

b e e p

Exposure button

Light Indicators at the Display, Audible Sound at the Wall Adapter.

• Switch unit ON with master power switch. The stored exposure data must light up on the display,
see Operating Instructions under ”Preparing the exposure”.

• Make an exposure:
– Set the exposure time to 1.00 s for conventional radiography technique (Digital

– CAUTION RADIATION: Depress the exposure button and hold until the exposure terminates auto-

matically. The radiation indication X-ray must light up during the exposure period.
Simultaneously an audible beep must sound at the wall adapter. In operation with remote control,
the LED on the remote station must light up as well.
The Standby indicator lamp / Ready LED flashes until the automatic cooling down time of the tube
assembly has expired.

• Interrupt an exposure
– Set the exposure time to 3.2s.

– CAUTION RADIATION: Press the exposure button until X-ray lights up and subsequently release –

the exposure must terminate immediately. The selected exposure time blinks until the automatic
cooling down time of the tube assembly has expired.

• Defective light indicators constitute a safety hazard to the patient as well as to the operator.
CAUTION: The user is not permitted to use the unit until light indicators have been replaced!

41 62 983 D 3202.101.01.06.02 5

– deadman feature:

must not light up).

Maintenance Instructions Sirona Dental Systems GmbH

Tube Current Verification

• Turn unit OFF and remove housing (see Service Manual!).

• Remove jumper from test points DX1.X6/X7.

• Connect multimeter to X6+/ X7 –, range 10mADC.

• Turn unit ON.

• Set the exposure time on the control panel to 3.2s, using the object selector switch
(conventional radiography technique).

• CAUTION RADIATION: Make an exposure.

• The reading should be 7mADC

• If specified value is obtained turn unit OFF (WARNING: Electrical shock hazard!).

• Remove meter leads and replace jumper!

– If specified value cannot be obtained, see Service Manual, chapter ”Tube Current Verification”.

6 41 62 983 D 3202.101.01.06.02

±0.5mA. z z Record reading.

Sirona Dental Systems GmbH Maintenance Instructions

Exposure Time Verification

(conventional radiography technique)

• For testing the exposure times a mechanical pulse counter is needed.

• Switch unit OFF (WARNING: Electrical shock hazard!) and connect the test leads to testpoints MP311/
MP312 on PCB DX1.

• Switch unit ON.

• Make an exposure with each of the exposure times given. CAUTION RADIATION!
– Observe the cooling time between exposures. The Standby indicator lamp / Ready LED flashes until

the automatic cooling down time of the tube assembly has expired.

– Set exposure times using the object selector switch (see Operating Instructions).

Exposure time 0.4s at 60Hz: 24 pulses Tolerance±1 pulse, at 50Hz: 20 pulses ±1
Exposure time 3.2s at 60Hz: 192 pulses Tolerance±9 pulses, at 50Hz: 160 pulses ±8

• Record indicated pulse count. Reset counter after each exposure.

• Switch unit OFF (WARNING: Electrical shock hazard!) and disconnect pulse counter.

• If the measured pulse count is not within specified tolerance,
see Service Manual, chapter ”Exposure Time Verification”.

41 62 983 D 3202.101.01.06.02 7

Maintenance Instructions Sirona Dental Systems GmbH

Verification of the Exposure Button

• If door contacts are installed, close door (close contacts), do not bridge contacts.

• Turn unit OFF (WARNING: Electrical shock hazard!)

• Connect multimeter to DX1 X5.3 and 4, range for measuring resistance.

• Measure resistance:

Exposure button not depressed: R > 100 kOhm

Exposure button depressed: R < 100 Ohm

The values must remain constant, even if the coiled cable is moved during the measurement.

– If the values are not present, check correct function of the door contacts.

• If the values are still not present, exchange exposure button.

• Disconnect multimeter.

• Reattach housing (see Service Manual, chapter ”Removing Housing”)

8 41 62 983 D 3202.101.01.06.02

Sirona Dental Systems GmbH Maintenance Instructions

ON OFF

Verification of the Object Selector Switch

I.00 s

2

D

1

• Turn object selector switch (1) to the lefthand stop (turn counter clockwise).

Turn object selector switch (1) clockwise step by step (12 steps) up to the righthand stop, recordin
displayed (2) time value for each step.

• Repeat procedure and compare indicated values with recorded values.

• If the values differ between first and second reading: exchange generator DS.

41 62 983 D 3202.101.01.06.02 9

g the

Maintenance Instructions Sirona Dental Systems GmbH

Mechanical Adjustments (if required)

Readjustment is necessary, if the tubehead does not remain stationary after being positioned.

1. Adjust spring on left support arm:
Slip bellows on both sides over the half shells A. Pull the half shells off.
Pull the scissors arm apart and push bellows over the bearing. Set both support arms vertical.
Insert torx screwdriver from above into the bore of the bearing and adjust the spring (turn clockwise
tighter).
Complete again in reverse order

2. Adjust spring on right support arm:
Slip bellows over the upper half shell A. Press the bellows down.
Bring support arm into horizontal position.
Insert torx screwdriver from the front into the bore of the bearing and adjust the spring (turn clockwise
tighter).
Complete again in reverse order.

10 41 62 983 D 3202.101.01.06.02

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→

→

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Customer: ____________________ Address: ________________________________

Dealer: _______________________ Address: ________________________________

Date of original installation: _______ Date of inspection: ________________________

Report of Assembly FD 2579 # ____

SCHEDULE Yes No Remarks

All manuals are present

Test instruments as required

Manufacturer Model Accuracy Last calibrated

Voltmeter

mAmeter

Pulse Counter

Any mechanical damage noticed

All labels are present and legible

All indicator lights are O.K.

Radiation indicator X-ray lights up, audible buzzer O.K.

Deadman feature O.K.

Tube current is within specified limits Measurement: . . . . . mA

Specified exposure time (pulses) O.K. Pulse Count: . . . . . . . .

Exposure button O.K. Resistance within specified limits

Object selector switch O.K.

Mechanical adjustment of the support arm is O.K.

The unit is in compliance with
MFG specified tests and safety

Technician:____________________ Dealer: _________________________________

41 62 983 D 3202.101.01.06.02

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Customer: ____________________ Address: ________________________________

Dealer: _______________________ Address: ________________________________

Date of original installation: _______ Date of inspection: ________________________

Report of Assembly FD 2579 # ____

SCHEDULE Yes No Remarks

All manuals are present

Test instruments as required

Manufacturer Model Accuracy Last calibrated

Voltmeter

mAmeter

Pulse Counter

Any mechanical damage noticed

All labels are present and legible

All indicator lights are O.K.

Radiation indicator X-ray lights up, audible buzzer O.K.

Deadman feature O.K.

Tube current is within specified limits Measurement: . . . . . mA

Specified exposure time (pulses) O.K. Pulse Count: . . . . . . . .

Exposure button O.K. Resistance within specified limits

Object selector switch O.K.

Mechanical adjustment of the support arm is O.K.

The unit is in compliance with
MFG specified tests and safety

Technician:____________________ Dealer: _________________________________

41 62 983 D 3202.101.01.06.02

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Customer: ____________________ Address: ________________________________

Dealer: _______________________ Address: ________________________________

Date of original installation: _______ Date of inspection: ________________________

Report of Assembly FD 2579 # ____

SCHEDULE Yes No Remarks

All manuals are present

Test instruments as required

Manufacturer Model Accuracy Last calibrated

Voltmeter

mAmeter

Pulse Counter

Any mechanical damage noticed

All labels are present and legible

All indicator lights are O.K.

Radiation indicator X-ray lights up, audible buzzer O.K.

Deadman feature O.K.

Tube current is within specified limits Measurement: . . . . . mA

Specified exposure time (pulses) O.K. Pulse Count: . . . . . . . .

Exposure button O.K. Resistance within specified limits

Object selector switch O.K.

Mechanical adjustment of the support arm is O.K.

The unit is in compliance with
MFG specified tests and safety

Technician:____________________ Dealer: _________________________________

41 62 983 D 3202.101.01.06.02

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Customer: ____________________ Address: ________________________________

Dealer: _______________________ Address: ________________________________

Date of original installation: _______ Date of inspection: ________________________

Report of Assembly FD 2579 # ____

SCHEDULE Yes No Remarks

All manuals are present

Test instruments as required

Manufacturer Model Accuracy Last calibrated

Voltmeter

mAmeter

Pulse Counter

Any mechanical damage noticed

All labels are present and legible

All indicator lights are O.K.

Radiation indicator X-ray lights up, audible buzzer O.K.

Deadman feature O.K.

Tube current is within specified limits Measurement: . . . . . mA

Specified exposure time (pulses) O.K. Pulse Count: . . . . . . . .

Exposure button O.K. Resistance within specified limits

Object selector switch O.K.

Mechanical adjustment of the support arm is O.K.

The unit is in compliance with
MFG specified tests and safety

Technician:____________________ Dealer: _________________________________

41 62 983 D 3202.101.01.06.02

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Customer: ____________________ Address: ________________________________

Dealer: _______________________ Address: ________________________________

Date of original installation: _______ Date of inspection: ________________________

Report of Assembly FD 2579 # ____

SCHEDULE Yes No Remarks

All manuals are present

Test instruments as required

Manufacturer Model Accuracy Last calibrated

Voltmeter

mAmeter

Pulse Counter

Any mechanical damage noticed

All labels are present and legible

All indicator lights are O.K.

Radiation indicator X-ray lights up, audible buzzer O.K.

Deadman feature O.K.

Tube current is within specified limits Measurement: . . . . . mA

Specified exposure time (pulses) O.K. Pulse Count: . . . . . . . .

Exposure button O.K. Resistance within specified limits

Object selector switch O.K.

Mechanical adjustment of the support arm is O.K.

The unit is in compliance with
MFG specified tests and safety

Technician:____________________ Dealer: _________________________________

41 62 983 D 3202.101.01.06.02

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