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Siemens MAMMOMAT Скачать руководство пользователя страница 15

7 High tension power supply

MAMMOMAT Balance

SPB7-115.831.01 Page 15 of 22

Siemens AG

Maintenance Instructions

Rev.01 05.04

Medical Solutions

7 High tension power supply

PMF kV waveforms

The oscillogram shows the H.V.vaweform at 20 kV and 35 kV measured on TP1.
kV wave form has no overshoot for any kV / mA loading factors combination.

kV risetime

PMF Internal kV check (TP1/TP2)

•

DVM 1000Vdc f.s. or oscilloscope with 1:100 1000Vdc probe can be connected to TP1/TP2
(GND) of PCB 94-132, see page 17.

•

Remove any table, select Manual Mode and an mAs value high enough to allow stable
reading.

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Содержание MAMMOMAT

Страница 1: ...31 01 01 02 Replaces n a X Siemens AG 2004 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 05 04 ...

Страница 2: ...s 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 autho ...

Страница 3: ...REQUIRED TOOLS MEASUREMENT AND AUXILIARY DEVICES 5 1 4 REQUIRED LUBRICANTS 5 1 5 TEXT EMPHASIS 6 1 6 SAFETY INFORMATION AND PREVENTIVE MEASURES 7 1 7 EXPLANATION OF ABBREVIATIONS 8 1 8 SYMBOLS 8 2 SYSTEM 9 3 COLUMN STAND 10 4 COMPRESSION SYSTEM 11 5 ROTATING ANODE STA RTER 12 6 FILAMENT 14 7 HIGH TENSION POWER SUPPLY 15 8 MISCELLANEOUS 18 9 FINAL TESTS 21 10 CHANGES TO PREVIOUS VERSION 22 ...

Страница 4: ...Contents MAMMOMAT Balance SPB7 115 831 01 Page 4 of 22 Siemens AG Maintenance Instructions Rev 01 05 04 Medical Solutions This page intentionally left blank ...

Страница 5: ...urement and auxiliary devices Oscilloscope Oscilloscope probe 1 100 600Vdc Digital multimeter Non invasive kVp meter mammo Dosemeter mammo Service PC with serial port connection cable is supplied with the unit MAMMOMAT Balance SSW Service Software Program is supplied with the unit SIB phantom or Normi 7 or 4 cm Plexi or customer phantom supplied by customer Sensitometer Densitometer Film pack 18x2...

Страница 6: ...with the safety alert symbol indicates a risk of danger that leads to slight or moderate physical injury and or damage to property NOTICE used without the safety alert symbol indicates a risk of danger that if disregarded leads or may lead to a potential situation which may result in an undesirable result or state other than death physical injury or damage to property NOTE contains information pro...

Страница 7: ...by means of bleeder resistors in not less than 5 minutes due to capacitor size energy stored is still dangerous if short to ground occurs when It s less than 60Vdc and till when capacitors are not fully discharged Rectifier bridges PD1 PD2 Capacitors block C1 2 3 4 Inverter block and electrical connection to High Voltage generator High voltage 20 35 kV is present on High Voltage generator High vol...

Страница 8: ...enance PMP Preventive Maintenance Preventive Parts Replacement External Inspection etc PMA Preventive Maintenance Adjustments PMF Preventive Maintenance Function Check Operating Value Check Q Quality Check QIQ Image Quality Check QSQ System Quality Check SW Software Maintenance CSE Customer Service Engineer CS No Customer Specific Number IVK Installed Volume Components 1 8 Symbols Checks and adjus...

Страница 9: ...t loosened by pulling pushing it in different directions n 3 see figure SIM Table retain Check that all tables are retained when inserted and can t be removed with very light pulling force Inspect connectors and connector cover integrity on the table support n 4 see figure SIE Cable System OFF Check the condition of the power connection cable and the corrugated tubing n 5 see figure Check the cond...

Страница 10: ...wear or loosened fixation n 3 see figure Does the alarm come out if safety micro switch is disconnected n 4 see figure SIM Vertical C Arm drive Do the chain chain fixation and gear box show any damage or sign of wear or loosened fixations n 5 see figure SIE Limit switches System ON Move the lifting carriage up and down Do the first limit switches MW4 up and MW3 down stop the carriage travel at the...

Страница 11: ...magnification support fixation Check that the magnification plateform can be fixed at 1 5x and 2x SIM Testing the Compression force Use shifted compression plate position a bathroom balance on the top of the table and tennis ball select maximum compression force and check it SIM Testing the Decompression force Move compression plate up and check that force to stop it by hand is very light PMF Comp...

Страница 12: ...ws DEMO mode with DIP 3 SW1 of board 01 170 switched ON Manual mode with at least 200 mAs In this mode no X rays are generated and measurement time is sufficiently long PMF Control LED brake enabled PCB 92 074 LED1 yellow bright during normal rotation phase RUN LED2 yellow bright during breaking or alarm LED3 yellow bright during breaking LED5 green bright in stand by or rotation LED6 green bright...

Страница 13: ...rotation phase RUN LED2 yellow dark during breaking or alarm LED3 yellow dark during breaking LED5 green bright in stand by or rotation LED6 green bright during rotation PMF Brake disabling for heavy use If upon log file inspection high duty comes in evidence it recommended to disable anode rotation brake to reduce operative tube assembly temperature For more details refer to service instructions ...

Страница 14: ...ation report Set to ON DIP1 SW1 of PCB 01 170To access mAH current calibration Set to ON DIP2 SW1 of PCB 01 170To access mAL current calibration In the mAs window of the display the following parameters will appear mAH or mAL filament current If in Ampere selected mAs after each exposure the expected anode current value and effective anode current in mA PMF Control LED LED1 Bright in normal condit...

Страница 15: ...he oscillogram shows the H V vaweform at 20 kV and 35 kV measured on TP1 kV wave form has no overshoot for any kV mA loading factors combination kV risetime PMF Internal kV check TP1 TP2 DVM 1000Vdc f s or oscilloscope with 1 100 1000Vdc probe can be connected to TP1 TP2 GND of PCB 94 132 see page 17 Remove any table select Manual Mode and an mAs value high enough to allow stable reading ...

Страница 16: ...vot value is 28kV kV values are not affected by the replacement of Inverter or H V transformer if VTP8 is 5 00Vdc standard calibration PMF External kV check Measurement of the kV value with non invasive instruments MUST be done exclusively with Molibdenum anode and Molibdenum filter without compression plate Measurement of the kV value done with non invasive instruments is affected by intrinsic li...

Страница 17: ...1 05 04 Medical Solutions PMF Checking and adjustment points TP1 TP2 for kV checks on PCB 94 132 of inverter block 08883436 RV1 for kV correction PMF CONTROL LED Green LED1 indicates that fuse F2 of PCB 94 132 is OK Yellow LED 2 turns on during exposure and can be used to verify continuous or pulsated X ray emission ...

Страница 18: ... radiation field limitation PMF Automatic filter selection If it exists select it from the control panel and check that audible sound during movement is normal PMF RX signal lamp Does the radiation ON indicator light up PMF AEC Detector test Check the Sensibility test r parameter as following During the test the system should be configured as shown in the figure below Install Grid table 18x24 Inst...

Страница 19: ...lease must be blocked under the following conditions indicated on the control console No cassette is inserted Cassette was not changed after the last exposure No collimation plate SIE Emergency STOP Press Emergency STOP on each side of the unit one at a time and check that unit is completely switched OFF SIE Exposure and error data recorder Read out the last 1300 exposures errors memory and error ...

Страница 20: ...e SPB7 115 831 01 Page 20 of 22 Siemens AG Maintenance Instructions Rev 01 05 04 Medical Solutions QIQ Phantom exposures Compare the phantom exposures with those on hand and or archive them for the next maintenance as starting values ...

Страница 21: ...perating problems during the checks PMP Covers Attach all removed covers Check that all covers are complete and firmly seated including the cable ducts SIE Protective conductor test Perform the protective conductor test PMP Cleaning Damaged paint Clean the unit using the materials recommended in the Instructions for use and repair any damaged paint System ON QSQ Final test exposure Take one final ...

Страница 22: ...Changes to previous version MAMMOMAT Balance SPB7 115 831 01 Page 22 of 22 Siemens AG Maintenance Instructions Rev 01 05 04 Medical Solutions 10 Changes to previous version Chapter Page Change n a n a n a ...

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