The reproduction, transmission or use
of this document or its contents is not
permitted without express written
authority. Offenders will be liable for
damages. All rights, including rights
created by patent grant or registration
of a utility model or design, are
reserved.
English
Doc. Gen. Date: 09.05
2003
Page 2
2Revision / Disclaimer
1Revision / Disclaimer
Document revision level
The document corresponds to the version/revision level effective at the time of system
delivery. Revisions to hardcopy documentation are not automatically distributed.
Please contact your local Siemens office to order current revision levels.
Disclaimer
The installation and service of equipment described herein is to be performed by qualified
personnel who are employed by Siemens or one of its affiliates or who are otherwise
authorized by Siemens or one of its affiliates to provide such services.
Assemblers and other persons who are not employed by or otherwise directly affiliated
with or authorized by Siemens or one of its affiliates are directed to contact one of the
local offices of Siemens or one of its affiliates before attempting installation or service procedures.
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Page 3
Table of Contents3
1-0Table of Contents
1 _______ General information______________________________________________ 5
9 _______ Changes to Previous Version _____________________________________ 61
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General information5
1General information
2-
Performing the work0
Any technician duly assigned by the local Siemens office is authorized to perform maintenance and service work.
UCertain tasks may also be performed by other technical personnel (e.g. the customer's
hospital technicians). These tasks are marked by the icon shown here.
In such cases it is absolutely necessary:
•to observe all instructions in the text and graphics;
•to use the specified tools, test equipment and aids.
You can also contact your national Siemens Uptime Service Center for support.
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Page 6
6General information
Special text indicators0
DANGER
WARNING
CAUTION
NOTICE
DANGER indicates an immediate danger that if disregarded will
cause death or serious physical injury.
¹
WARNING indicates a possible danger that if disregarded can
cause death or serious physical injury.
¹
CAUTION used with the safety alert symbol indicates a possible
danger that if disregarded will or can lead to minor or moderate
physical injury and/or damage to property.
¹
NOTICE used without the safety alert symbol indicates a possible
danger that if disregarded can or will lead to an undesirable outcome or state other than death, physical injury or property damage.
¹
NOTE
NOTE is used to indicate information that explains the proper way
to use devices or to carry out a process, i.e., provides pointers and
tips.
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General information7
Icons0
XWarning about ionizing radiation or radioactive substances. Tests and adjustments that
must be performed with the radiation switched on are indicated by this radiation warning
icon.
.
VDangerous electrical voltage > 25 VAC or > 60 VDC.
CCaution! General hazard warning.
EESD: Warning about electrostatically sensitive components.
PReport icon. Used to indicate entries in certificates.
UCertain tasks can also be performed by other technical personnel (e.g. the customer's
hospital technicians).
Fig. 1:
Certain sections apply only to the USA. These sections are marked with this icon.
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Page 8
8General information
Information on product safety and protective measures0
DANGER
Lethal electric shock and radioactive contamination hazards exist.
- While troubleshooting or servicing,
individuals can come into contact with dangerous
components.
- Some tests and adjustments must be performed
with the radiation turned on.
Disregarding the safety instructions will lead to death or serious
bodily injury.
¹ When performing service and tests always observe:
¹ - the product-specific safety information contained in
the technical documentation,
¹ - and the general safety information (TD00-000.860.01...).
¹
¹ Remove or install components only if:
¹ - the system is switched off, and
¹ - the capacitors are discharged, and
¹ - the ESD guidelines are followed, and
¹ - for the XP Hybrid, the batteries are disconnected.
¹
¹ Tests and adjustments that must be performed with the
radiation switched on are marked by this radiation warning icon. The required radiation protection measures
must be followed for these adjustments.
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General information9
DANGER
Lethal shock hazard exists.
Anyone performing troubleshooting and/or service with the safety
covers off may come into contact with live parts. This hazard exists as long as:
- the power supply is connected;
- the capacitor bank or individual capacitors are still charged; capacitors may still be charged even when the system is switched off
and the power cord is disconnected (e.g. due to defective fuses)!
- the battery blocks in the XP Hybrid are connected!
Disregarding the safety instructions will lead to death or serious
bodily injury.
¹ Make sure that no parts or tools fall into the unit;
¹ Do not touch potentially dangerous
components(Fig.2/p.10)
¹ If loose parts must be removed from the unit, use only
insulated tools;
¹ Protect the work area so that no other persons are able
touch the unit while the covers are open or removed!
•Switch the unit off before servicing or maintenance. Always disconnect the power plug
first.
•XP Hybrid: Make sure that the main switch and the battery mode are switched off.
•The capacitor bank discharges to < 40 V in approx. 15 minutes.
•The safety covers can be removed after this period has elapsed. The locations with
dangerous voltage still require extreme caution (see (Fig.2/p.10)).
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Page 10
10General information
Fig. 2:Locations with dangerous voltage
VWith housing covers open and safety covers removed.
Back:
Dangerous DC voltage (440V) on capacitor bank (D927)
Left:
Dangerous DC voltage (440V) directly on capacitor bank!
Right:
Dangerous DC voltage (440V) directly on capacitor bank!
Dangerous AC voltage (> 100V or > 60V half line voltage) on power supplies U1 and U2 as long as the power cord is connected.
Additionally for XP Hybrid:
Dangerous DC voltage (300 V) from the battery block to PCB D982!
Always disconnect the battery plug from BK1-BK4.
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General information11
System overview - user0
Fig. 3:User overview_01
(1) Hanger for lead apron(13) Castors
(2) Articulated arm(14) Console with chassis
(3) Sensor for IR remote control (optional)(15) IR remote control (optional)
(4) DAP display (optional)(16) Holder for IR remote control (optional)
(12) Cassette compartment(24) Motor control (Hybrid)
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Page 12
12General information
Orientation0
Fig. 4:Top view of system_01
System orientation to clarify the technical description
AbbreviationsExplanation
UvUser view - back (User view)
LLeft side of unit (left)
RRight side of unit (right)
FFront side (front)
fwFront wheels (front wheels)
saSupport arm (support arm)
TTube (single tank)
CMultileaf collimator (collimator)
ddDAP display (dose display)
NOTE
These orientation indicators are used in all technical documents.
Descriptions are always from the “forward travel" user view. Always use this perspective when communicating with third parties
(e.g., USC/HSC).
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General information13
System overview - service0
Fig. 5:Top view_01
Common parts of MOBILETT XP, Eco and Hybrid
AbbreviationsExplanation
D908User display and control
D916CPU board
D917Galvanic separation for S27/DAP/remote
RcbRemote control board (remote control option)
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Page 14
14General information
Fig. 6:Schematic overview of XP, Eco, Hybrid
Common parts of MOBILETT XP, Eco and Hybrid
AbbreviationsExplanation
SW1Key switch, power ON/OFF
Z1Line filter
C1 (R1)Capacitor for inverter with discharge resistor (front left side/not
shown here)
C2 (R2)Starter capacitor with discharge resistor
R3-5/R6
(Front right)
R3-R5 internal discharge resistor for capacitor bank
R6 separate discharge resistor for service
Capacitor block12 x 10 mF capacitors, mounted with D972
K22Main relay
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General information15
U1+5V/± 15V power supply
U2+24V power supply
D927Power Supply
D952Capacitor bank charging board (behind D927)
D962kV inverter (behind D927)
D972Capacitor bank board (behind D927)
SaSupport arm adjusting spring
swSupport rollers
Additional components for MOBILETT XP Hybrid only
SW2Op. mode selector (battery/off/line voltage)
D982Battery charger
D102Motor drive control
BK1/BK2Battery block, left
BK3/BK4Battery block, right
mr/mlMotor right/motor left
Optional parts for MOBILETT XP; Eco and XP Hybrid (not shown)
DAP chamberDose area product measuring chamber (mounted on the collima-
tor)
D991DAP adapter board (mounted in the collimator cover)
DAP displayDAP display board (mounted in the lower arm segment cover)
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Page 16
16General information
Cleaning0
•Always disconnect the MOBILETT from the power supply and switch it off before clean-
ing or disinfecting it.
•Never use abrasive cleaners or cleaning agents with solvents (e.g. cleaning solutions,
alcohol or spot removers), since they may damage housing surfaces.
•Do not spray anything on or into the unit.
•Wipe off the MOBILETT with a cloth moistened with water or a diluted, lukewarm solu-
tion containing water and dishwashing liquid.
For more information, see the section on "Cleaning and disinfection" in the operating
instructions.
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General information on start-up17
2General information on start-up
3-
Required Documents0
PCheck the documents delivered for completeness.
Ring binders containing user documents:
•Operator ManualSPR8-230.621.01..
Ring binders containing technical documents:
•General safety informationTD00-000.860.01...
•Installation and Start-upSPR8-230.814.01...
•Maintenance InstructionsSPR8-230.831.01...
•Maintenance ProtocolSPR8-230.832.01...
•Troubleshooting InstructionsSPR8-230.840.01...
•Replacement of PartsSPR8-230.841.30...
•Wiring DiagramSPR8-230.844.01...
SPR8-230.844.05...
•Disposal instructionsSPR8-230.861.01...
•Manufacturer's certificatesn.a.
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Page 18
18General information on start-up
Required tools, test equipment and aids0
•Standard service tool kit
•Digital multimeter
•Device leakage current measuring device
•Protective ground wire tester
•Storage oscilloscope ( ± 2.5 % accuracy) or kV meter.
•Storage oscilloscope ( ±2.5 % accuracy) or mAs meter.
•Dosimeter.
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General information on start-up19
Information on start-up0
•The start-up procedure described here corresponds to a functional test. All adjust-
ments and calibrations are performed at the factory. The MOBILETT XP (Hybrid) is
ready for operation on completion of the start-up report.
•The unit can be connected to line voltages of 100-130 V ( ± 10%) or 200-240 V ( ±
10%). The unit automatically adjusts to the existing line voltage.
NOTE
Observe the nominal current of the fuses for the on-site power
connections:
- 15A slow-blow (on-site) for 100-130V ± 10% or
- 15A slow-blow (on-site) for 200-240 V ± 10% line voltage.
The power cable for this device is equipped with a standard safety
plug.
Attach a power plug that is compliant with local standards if necessary.
•Following start-up, country-specific tests must be performed if necessary.
e.g.:
Acceptance test according to §16 of the X-ray Ordinance (Germany):
Use the measurements in the test certificate provided as the initial values for the required
measurements.
The following values were measured by the manufacturer; refer to the test certificate:
- Brightness of the light localizer
- Filter values (Al equivalent for tube assembly and collimator)
- Coincidence of light field and radiation field
- Accuracy of the tube voltage
- Accuracy of the kV value steps
- Accuracy of the mAs values
- Reproducibility of dose values
•The test/measured values marked by the report icon must be entered in the start-up re-
port located at the end of this manual.
NOTE
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Recording information immediately during start-up saves time.
Fill in the report form after completing each task.
The start-up report is a component of this documentation.
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20General information on start-up
Information on the protective conductor resistance test0
Observe the instructions in the "Safety Rules for Installation and Repair"
(ARTD-002.731.17 ...).
The protective conductor resistance of 0.2 ohms must not be exceeded.
Initial measurement
Perform the protective conductor test after completion of all work.
The measurement must be performed according to DIN VDE 0751, Part 1 (see ARTD
Part 2). The protective conductor resistance for all touchable conductive parts must be
measured during the normal operating state of the system.
Make sure that control cables or data cables between the components of the system are
not mistaken for protective conductor connections.
During the measurement, move the power cable and additional connection cables with an
integrated protective conductor section by section to detect cable breaks.
The protective conductor resistance must not exceed 0.2 Ohms.
The values must be recorded as the first measured values in the protective conductor
resistance report, and the measuring points must be given.
The measuring procedure and the measuring device used (designation and serial number) must also be documented.
Fig. 7:Measuring circuit for measuring the protective conductor resistance for units that are
disconnected from power, in compliance with DIN VDE 0751-1/2001-10, Fig. C2.
Pos. 1= System
Pos. 2= Application part type B (if available)
Pos. 3= Measurement setup (integrated into measuring device)
Repeat measurement
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General information on start-up21
In the case of maintenance or repairs, perform the protective conductor resistance measurement again.
Document and assess the values determined in the repeat measurement.
The measurement must be performed according to DIN VDE 0751, Part 1 (see ARTD
Part 2). The protective conductor resistance for all touchable conductive parts must be
measured during the normal operating state of the system.
Make sure that control cables or data cables between the components of the system are
not mistaken for protective conductor connections.
During the measurement, move the power cable and additional connection cables with an
integrated protective conductor section by section to detect cable breaks.
The protective conductor resistance must not exceed 0.2 Ohms.
The values determined in the repeat measurement must be recorded and assessed in the
protective conductor resistance report, and the measuring points must be given.
The measuring procedure and the measuring device used (designation and serial number) must also be documented.
NOTE
For evaluation purposes, the first measured value and the values
documented during maintenance or safety checks must be compared to the measured values. A sudden or unexpected increase
in the measured values may indicate a defect in the protective conductor connections (protective conductor or contacts) - even if the
limit value of 0.2 ohms is not exceeded.
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Page 22
22General information on start-up
Information on measuring the leakage current0
Observe the instructions in the "Safety Rules for Installation and Repair"
(ARTD-002.731.17 ...).
WARNING
Electrical voltage!
Non-compliance can lead to severe injury and even death.
¹ The leakage current measurement may be performed on
systems of protection class I only after the protective
conductor test has been passed.
Initial measurement
Perform the leakage current measurement after completion of all work.
Perform the measurement according to DIN VDE 0751, Part 1 (see ARTD-002.731.17....),
and record the determined value as the first measured value.
Measurement of the leakage current according to the differential current method (measurement setup according to (Fig.8/p.22)) must be given preference, since this method
is not dangerous to the person performing the measurement and other persons.
However, please note the minimum resolution of the leakage current measuring device
and any additional manufacturer information restricting the use of the measuring device.
Fig. 8:Measuring circuit for measuring the system leakage current according to the differential
current method in compliance with DIN VDE 0751-1/2001-10, Fig. C6 for protection
class I.
Pos. 1= System
Pos. 2= Application part type B (if available)
Pos. 3= Measurement setup (integrated into measuring device)
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General information on start-up23
If the direct measurement of the leakage current is used (measurement setup according
to (Fig.9/p.23)), the system must be insulated during the measurement and must not be
touched.
Fig. 9:Measuring circuit for direct measurement of the system leakage current in compliance
Pos. 1= System
Pos. 2= Application part type B (if available)
Pos. 3= Measurement setup (integrated into measuring device)
with DIN VDE 0751-1/2001-10, Fig. C5 for protection class I.
WARNING
Electrical voltage!
Non-compliance can lead to severe injury and even death.
¹ No housing parts of the system may be touched during
direct measurement of the leakage current (measurement setup according to (Fig.9/p.23)).
¹ Third-person access to the system must be prevented.
The system must be switched on during measurement. Measuring devices with automated measuring sequences must therefore be set to manual measurement.
Enter the highest value as the first measured value in the system leakage current report.
This value must not exceed the permissible leakage current values according to DIN VDE
0751-1/2001-10, Table F.1, line "leakage current for devices according to remarks 1 and
3", of 2.5 mA.
Measure and record the current line voltage. If the measured line voltage deviates from
the nominal voltage, correct the measured value to the value corresponding to a measurement at the nominal value of the line voltage. This must also be documented.
Document the measuring procedure (differential measurement or direct measurement)
and the measuring device used (designation and serial number).
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Page 24
24General information on start-up
Repeat measurement
When maintenance or repair work is performed on the primary power supply circuit (e.g.
repairs to the power-on circuit or replacement of the line filter), the leakage current measurement must be repeated.
The same measuring conditions as in the first measurement apply.
Record and assess the highest value determined in the repeat measurement in the existing leakage current report.
This value must not exceed the permissible leakage current values according to DIN VDE
0751-1/2001-10, Table F.1, line "leakage current for devices according to remarks 1 and
3", of 2.5 mA.
Measure and record the current line voltage. If the measured line voltage deviates from
the nominal voltage, correct the measured value to the value corresponding to a measurement at the nominal value of the line voltage. This must also be documented.
Document the measuring procedure (differential measurement or direct measurement)
and the measuring device used (designation and serial number).
NOTE
For evaluation purposes, the first measured value and the values
documented during maintenance or safety checks must be compared to the measured values. A sudden or unexpected increase
in the measured values may indicate that a fault has occurred in
the primary power supply circuit (damaged insulation, damage
from moisture, defective interference suppressor, etc.) - even if the
limit value of 2.5 mA is not exceeded.
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Unpacking and visual inspection25
3Unpacking and visual in spection
4-
Unpacking0
Fig. 10: Unpacking
•Please follow the unpacking instructions (Fig. 10 / p. 25).
•Check the manual movement mode and the hand brake.
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Page 26
26Unpacking and visual inspection
Visual inspection0
P•Check the unit for external damage (cracks, breaks, scratches, corrosion etc.).
•Check whether the single tank or the multileaf collimator show any signs of mechanical
defects which might impair the radiation protection.
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Unpacking and visual inspection27
Mechanical function test0
Cable winch0
P•Pull out the cable until it is completely unwound.
•Hold the cable with one hand near the duct to slow it down as it is being wound. Pull up
the brake of the cable winch and wind up the cable completely.
This device is equipped with a standard safety plug. Attach a power plug that is compliant
with local standards if necessary.
Support arm movements0
P•Unlock the support arm. Then check its movements, including several stops. If the DAP
chamber is included in the scope of delivery, it must be attached to the collimator. The
arm should be easy to move through its full range using one hand and should stop in
any position without any additional movement (up or down).
Fig. 11: Positioning of support arm
Single tank and collimator movements0
P•Turn the collimator with the handle to the end positions ±90°.
•Rotate the tube to all of its commonly used working and park positions.
Identification (labeling)0
PAll identification labels are included in the scope of delivery.
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Page 28
28Unpacking and visual inspection
•Check the labeling according to the "Labels" chapter in the operator's manual.
•The device identifier should be entered in the start-up report.
Regional labeling
•Attach the radiation warning label to the control panel as shown in (1//Fig. 12 / p. 28).
Select the right language version.
Fig. 12: X-ray radiation warning label
•The label "DANGER! Explosion hazard...” is supplied in a number of languages. Select
the correct language version and attach it to the backside (cover with cassette holder)
in accordance with the operator's manual.
•Only if required by the user:
Affix the “Do not open doors with the device" as shown in (Fig. 13 / p. 28).
Fig. 13: "Rambo" label
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Unpacking and visual inspection29
•For Germany only:
Select the 1.5m, 2.5m or 3.5m “control area" label as required by the customer and affix
it to the bottom of the arm as shown in (Fig. 14 / p. 29).
Fig. 14: "Control area" label
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Page 30
30Functional test
4Functional test
5-
Line voltage0
PCheck the local line voltage by testing a power outlet with the DVM.
NOTE
The system automatically adjusts to the existing (local) line voltage.
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Functional test31
Operating Elements and Displays0
PConnect the power plug and check whether the AC symbol (~) lights up on the control
panel (Fig. 15 / p. 31)
Switch the unit on. Wait for initialization (audible acoustic signal and flashing kV- / mAs
displays).
NOTE
Fig. 15: Control and display
If the unit has not been used for some time, error ERR13 may appear, indicating a high device leakage current on the capacitor
bank.
Switch the system off and then on again to correct this problem.
If the error persists after several power-off/on cycles, perform the
“Forming the capacitor bank" service step as described in the
troubleshooting instructions.
•Select all values using the "± kV/ ± mAs" keys.
See technical data in operator's manual; note line voltage.
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Page 32
32Functional test
Multileaf collimator function0
P•Completely open the collimator.
•Check the function of light keys on the collimator.
•Check the manual collimations with the light on.
•The light switches off after approx. 20 secs.
•Test the collimator light key on the control panel (Fig. 15 / p. 31).
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Functional test33
Exposure release with high voltage0
NOTE
P•Close the collimator and set the display on the control panel to 60 kV/10 mAs.
If the “DAP" and/or "remote control“ options are installed, they
can be tested for proper function during the following tests involving release of the X-ray radiation.
•The control display for "exposure circuit ready" must light up green (control panel,
(Fig. 15 / p. 31)).
•Set the exposure switch (S27) to preparation and check the “exposure ready" acoustic
signal (after approx. 2 seconds).
•Stop 'preparation' and check the cutoff time of approx. 15 seconds. ERR 25 appears on
the display (preparation time without exposure).
•Acknowledge the error with the “collimator light" key on the control panel.
X
•Release an exposure.
The radiation indicator (Fig. 15 / p. 31) lights up during the exposure; at the same time
an acoustic signal sounds and the "exposure circuit ready" light goes out.
•“Exposure circuit ready" lights up again within 15 sec. max.
Manual termination of exposure0
X
The user must be able to cancel an exposure at any time.
•Set a midrange kV value (e.g., 70 kV) and the highest possible mAs value.
•Release an exposure and interrupt it immediately. The display then reads "ERR 39"
and 10 short acoustic signals sound (exposure aborted). Acknowledge the error message with the “collimator light" key on the control panel.
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Page 34
34Functional test
Light field/radiation field0
P•Prepare a 35x35 cm cassette with film.
•Place the cassette on a suitable support.
•Set SID to 100 cm (use the collimator's tape measure).
•Align the light localizer to the cassette and collimate to approx. 25x25cm.
•Mark the four sides and one of the corners (e.g. with coins / (Fig. 16 / p. 34)).
X
•Set the control panel to 55 kV/ 2.5 mAs and release an exposure.
•Develop the film.
•Measure the deviation between the light field and the radiation field ((Fig. 17 / p. 34)).
The permissible deviation is ± 1.7% of the SID ((Fig. 17 / p. 34)).
If the deviation is > 1.7%, the collimator must be adjusted (see “Replacement of parts").
Fig. 16: Light field/radiation field, cassette
Fig. 17: Light field/radiation film
.
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Programmable device parameters0
Various parameters can be changed at the customer's request. The procedure is
described here. For detailed information, refer to the troubleshooting instructions
(SPR8-230.840.01..).
kV/mAs0
P•Presetting after switch-on - default 70 kV/5.0 mAs.
Service program Pr. 5 can be used to modify the preferred values or alternatively to
activate the "last value function".
•Maximum kV/mAs values - default set to "Max."
Display readings and selection options depend on the line voltage (see “Technical
data" in the operator's manual).
Change with service program Pr.6.
•Exposure points - standard 49 steps (47 steps for Eco).
Change with service program Pr. 11 (decrease to 25 or to 24 steps for Eco).
"AUTO_Off" (Hybrid only)0
PThe Auto_Off function is activated on delivery (the unit automatically switches off if not run
in battery mode for 15 minutes).
Deactivate the function with service program Pr. 10.
Sound level of the keyboard (“beep”)0
PPredefined setting ’bep1’ = quiet; confirmation tone upon pressing the "kV," "mAs," or
"collimator lamp" keys is OFF.
Change with service program Pr. 13.
Activating service programs0
•Switch the unit off.
E
•Remove the upper cover.
•Set service switch SW2B to "Service Position 2" (PCB D916 / (Fig. 18 / p. 36)).
•Switch the unit on.
¹ "Pr. 1" is shown on the user display.
•Select the required service program with the "mAs+ / mAs-" keys.
• Activate the service program with the collimator lamp key.
•Change values with the "± kV" and/or "± mAs" keys.
•Enter the required value and quit the program with the collimator lamp key.
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36Functional test
•Set service switch SW2B to "User position 1" and press reset button SW3 (PC board
D916).
• Check the new values in the user function.
•Switch the unit off and reattach the upper cover.
Fig. 18: Top view D916 CPU
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Options0
DAP0
PMeasuring device for dose area product (Dose Area Product).
The DAP measuring device is used to measure the kerma area product (kerma = kinetic
energy released in matter) during an X-ray examination. It is primarily used to record the
radiation dose a patient has been exposed to.
The DAP is calibrated at the factory.
•Press the Test button on the DAP display.
The displayed value must be in the range of 80-120 µGym
or in the range of 8-12 µGym
DAP resolution 0.01 µGym
Otherwise, the DAP measuring system has to be calibrated according to the
“Replacement of Parts” instructions.
2
(if using a high resolution measurement chamber, i.e.
2
).
2
(DAP resolution 0.1 µGym2)
X
•Verify the function of the DAP measuring system by releasing an exposure.
The display has to show a measurement value.
Remote control0
P•Adhere the remote control holder to the front right or left side.
•Switch the MOBILETT on.
X
•Test the “collimator light" and “exposure release" functions.
NOTE
The following start-up steps vary according to the type of unit.
MOBILETT XP:
Continue with “Final activities".
MOBILETT XP Hybrid:
Continue with “Hybrid battery mode" and proceed to “Final activities".
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38Functional test
Hybrid battery mode0
First check the battery status (1/Fig. 15 / p. 31). To do this, turn off the unit
(1/Fig. 19 / p. 39), disconnect the main power cord from the power supply and switch the
selector (2/Fig. 19 / p. 39) to battery mode. Switch the unit on and check the battery status
on the control panel.
NOTE
The batteries will charge only if the unit is connected to line voltage and switched off. The
selector switch (2/Fig. 19 / p. 39)should be set to “0" for charging.
At least one of the display LEDs must light up for the tests in the
battery mode (1/Fig. 15 / p. 31)
Otherwise, charge the batteries until this operating state is
reached (min. charging time: 2 hrs.).
Tests in battery mode0
•Disconnect the main power cord from the power supply and wind it completely around
the cable spool.
•Using the selector switch, first switch the unit to battery mode. Then switch it ON.
•Check the battery status.
P
•Check the following functions according to the operator's manual:
- Test of operating elements and displays
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Functional test39
X- Radiation release
- Collimator light
- Motor drive
- DAP display (optional)
- Remote control (optional)
Fig. 19: User control, battery mode
(1) Power ON/OFF key switch(5) Switch for low and high
(4) Motor drive - forward / reverse (8) Brake/release for cable winch
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40Functional test
Final activities0
NOTE
Within the purview of the USA, perform the DHHS checks ("DHHS"
chapter) at this point.
•Turn off the unit and attach all cover parts.
Protective conductor test0
Observe the protective conductor resistance test information in these instructions.
•Perform the protective conductor test with all covers closed, in accordance with
ARTD-002.731.17... The protective conductor resistance must not exceed 0.2 Ohms.
P
P
•Record the determined values as the first measured values in the protective conductor
resistance report (chapter 8 of these instructions), and indicate the measuring points.
•The measuring procedure and the measuring device used (designation and serial num-
ber) must also be documented.
Leakage current measurement0
Observe the leakage current measurement information in these instructions.
P
P
•Measure the leakage current with all covers closed, in accordance with
ARTD-002.731.17... The limit value of 2.5 mA must not be exceeded.
WARNING
Electrical voltage!
Non-compliance can lead to severe injury and even death.
¹ No housing parts of the system may be touched during
direct measurement of the leakage current .
¹ Third-person access to the system must be prevented.
•The system must be switched on during measurement. Measuring devices with auto-
mated measuring sequences must therefore be set to manual measurement.
•Enter the highest value as the first measured value in the leakage current report (chap-
ter 8 of these instructions).
•This value must not exceed the permissible leakage current values according to DIN
VDE 0751-1/2001-10, Table F.1, line "leakage current for devices according to remarks 1 and 3", of 2.5 mA.
•Measure and record the current line voltage. If the measured line voltage deviates from
the nominal voltage, correct the measured value to the value corresponding to a measurement at the nominal value of the line voltage. This must also be documented.
P
MOBILETT XP (Hybrid / Eco) SPR8-230.814.01.06.02Siemens AG
•Document the measuring procedure (differential measurement or direct measurement)
and the measuring instrument used (designation and serial number).
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Functional test41
Reports0
•Separate the completed 'Start-up report' (chapter 6 of these instructions) from these in-
structions and file it in the system binder, Register 9, "Certificates."
•Separate the completed DHHS report (chapter 7 of these instructions) from these
instructions and file it in the system binder, Register 9, "Certificates."
•Separate the completed protective conductor resistance report and leakage current re-
port (chapter 8 of these instructions) from these instructions and file them in the system
folder, Register 9, "Certificates."
•Complete the installation protocol included with the unit and send it (by fax) to the ad-
dress given in the protocol.
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42DHHS
5DHHS
6-
DHHS tests (scope of validity: USA only)0
The following tests must be performed and recorded to satisfy the DHHS requirements:
•kV accuracy
•mAs accuracy
•Reproducibility
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Test of kV accuracy0
Requirement:
The measured kV values must comply with the limit values specified in the tables. One of
two measuring methods can be used:
1. kV meter method:
- kV meter based on the filter comparison technique (e.g. PTW-Nomex) Use the correction factor given in the kV meter operator's manual for non-invasive kV measurements.
2. Oscilloscope method:
- Storage oscilloscope with a measuring accuracy of ± 2.5%
Technique with the kV meter:0
NOTE
The inherent filtration (AL equivalent) of MOBILETT XP and Hybrid
is 3.1mm Al (single tank plus collimator).
An installed DAP measurement chamber increases the inherent filtration by 0.4 mm AL.
•Prepare the kV meter for the measurement according to the operator's manual.
•Place the measuring detector on a suitable surface and adjust the single tank to the de-
tector with the light localizer (Fig. 20 / p. 43).
•Set the source-image distance to the value specified in the kV meter operator's manual.
Fig. 20: kV measurement
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44DHHS
For MOBILETT XP:
•Connect the power plug and turn the unit power switch "ON".
For MOBILETT XP Hybrid:
•Disconnect the power plug; first switch the unit to the battery mode and then "ON".
X
PRecord the measured values.
•Set the following exposure parameters and release an exposure after each setting:
kV meter
Selection
DC voltage
* The measuring inaccuracy of the measuring instrument used must be deducted from the
specified limit values.
Additional test for the MOBILETT XP Hybrid
Exposure parametersLimit values*
52 kV50 mAs49.0 - 55.0 kV
81 kV20 mAs77.0 - 85.0 kV
133 kV12.5 mAs126.4 - 139.6 kV
•Connect the power plug and switch the unit “ON" in the “line-powered" mode.
X
•Set the following parameters and release an exposure:
kV meter
Selection
DC voltage81 kV20 mAs77.0 - 85.0 kV
Exposure parametersLimit values*
PRecord the measured value.
Oscilloscope method: 0
"KVS" measuring point for the nominal value and “KV" measuring point for the actual
value. The measuring ratio is 30 kV/V.
•Open upper unit cover; measuring points on CPU D916 (see troubleshooting instruc-
tions).
•Follow the same procedure as described in “kV meter method".
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DHHS45
Test of mAs accuracy0
Requirement:
The measured mAs values must comply with the limit values specified in the tables. One
of two measuring methods can be used:
1. mAs meter method:
- mAs meter (e.g. MAS meter 8160400 with a measuring accuracy of 1% ± 1 digit)
2. Oscilloscope method:
- Storage oscilloscope with a measuring accuracy of ± 2.5%
Oscilloscope method:0
•Close the multileaf collimator and open the upper unit cover.
•Clamp the oscilloscope to the “JR" and “GND" measuring points on CPU D916.
For MOBILETT XP:
•Connect the power plug and switch the unit to the battery mode first and then to "ON".
For MOBILETT XP Hybrid:
•Disconnect the power plug; first switch the unit to the battery mode and then “ON".
•After switching the unit on (switch setting: “ON"), wait for approx. 5 minutes to let it sta-
bilize.
Example: Calculation of the mAs value
Fig. 21: mAs calculation
The mAs value can be calculated with the help of the oscilloscope display.
Surface “A" corresponds to the mAs value.
mAs = tube current X exposure time
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46DHHS
mAs = 340 mA x 0.006 s = 2.0 mAs
•Determination for the following exposure parameters (product of tube current x expo-
sure time):
X
Control unit setting
kVmAs
4054,7 - 5,3
8121,9 - 2,1
133109,5 - 10,5
* The measuring inaccuracy of the measuring instrument must be deducted from the
specified limit values.
PCalculate and record the mAs values.
Additional test for the MOBILETT XP Hybrid
•Connect the power plug and switch the unit “ON" in the “line-powered" mode.
•Set the following parameters and release an exposure:
Set the control unit to:
kVmAs
8121,9 - 2,1
Permissible mAs value*
Permissible mAs value*
PCalculate and record the mAs value.
mAs meter method: 0
Use of the mAs jumper on PCB D907 directly on the single tank.
•Remove cover from single tank and connect mAs meter to D907 (1/Fig. 22 / p. 47).
•Follow the same procedure as described in “Oscilloscope method".
For more information on the measuring technique, refer to the user's manual for the
mAs meter.
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DHHS47
Fig. 22: mAs jumper D907
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48DHHS
Reproducibility test0
Requirement:
•The coefficient of variation for the radiation dose for any combination of exposure pa-
rameters does not exceed 0.045. This requires operation at the line voltage compliant
with Siemens specifications.
X
NOTE
Required measuring instrument:
- Dosimeter
Procedure:
In the following test, 10 sequential exposures are taken within one
hour.
The exposure parameters should be briefly set to different values
following each measurement.
•After switching the system on, wait until its temperature has stabilized. The unit is ready
for these measurements after 15 minutes.
•Release the number of exposures with the specified exposure data:
- 85 kV, 1.0 mAs, 10 exposures.
•Measure the dose for each exposure.
•Reset the display prior to each new measurement.
Calculations: Coefficient of variation C
•Coefficient of variation C is determined for a series of 10 dose measurements with the
following formula:
Fig. 23:
s=Standard deviation resulting from the measurements
_
x=Average measurement of series
x
n=Number of individual measurements in series
Coefficient of variation C must be ≤ 0.045.
Example for determining coefficient of variation C:
Step 1)
=i. measurement of series
i
•10 exposures with recorded measurements (fictitious measured values).
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50DHHS
Fig. 26:
Fig. 27:
Step 4)
P
•Calculation of coefficient:
Fig. 28:
In this example, the generator complies with the specification:
C = 0.0105, hence it is ≤ 0.0450.
•Perform the described procedure and note the results in the DHHS report.
•Complete the DHHS report.
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Start-up report51
6Start-up report
7-
MOBILETT XP (Hybrid)0
This protocol confirms operability according to the datasheet. The original document
remains with the unit, and a copy is filed at the local branch office.
Type / Material No. / Serial No.: ...................................................................................