MAS-3B User`s Manual - English - 2.0A
Contents
1. and charging 12 gt Please note that to be able to gate the measurement for simultaneously measurement of not only mA and mAs you also should place the kV detector for the Piranha or Barracuda in the X ray field as indicated in figure 2 4 and 2 5 2010 10 2 0A MAS 3B User s Manual 2 FUNCTION AND CONNECTION Battery and Chargin 2 2 Battery and Charging The MAS 3B uses a built in rechargeable battery which you charge using the standard mini USB connector at the front panel of the probe You can use either e a USB cable and charge it from your computer e the charger that came with your Piranha e or a standard USB charger with an output of 5 V 1 A output Finally you need to turn the rotary switch to position Charge USB Off Figure 2 7 When the yellow LED is lit it indicates that the battery is charging When the yellow LED switches off the MAS 3B battery is fully charged It can take more than 6 hours but normally a fully charged battery can run the MAS 3B for more than 3 hours on battery before the Lo Batt Led is lit and you have to charge the battery again The battery cannot be over charged since the MAS 3B contains a charging controller Note that you cannot use the MAS 3B while it is charging You do have an alternative if you use the probe in a standard setup all the time you can then use the MAS 3B continuously when selecting USB Power On If the red Low Power LED light up then you charger cannot provides e2. of kerma kerma rate kVp tube current exposure time luminance and illuminance within limitations stated below If installed according to accompanying documents the product is intended to be used together with all diagnostic X ray equipment except for therapeutical X ray sources X ray equipment with tube potential below 20 kV X ray equipment on which the instrument cannot be mounted properly e g equipment where the beam field size is narrower than the active part of the detector specific types of X ray equipment listed in the instructions for use or in additional information from the manufacturer With the X ray installation in stand by conditions without patients present the product is intended to be used to provide the operator with information on radiation beam parameters that might influence further steps in an examination but not an ongoing exposure for assessing the performance of the X ray equipment for evaluation of examination techniques and procedures for service and maintenance measurements for quality control measurements for educational purposes authority supervision etc The product is intended to be used by hospital physicists X ray engineers manufacturer s service teams and other professionals with similar tasks and competencies The operator needs a short training to be able to use the product as intended This training can be achieved either by careful study of the manual s
3. of the software For Ocean all meter settings are found on the tabs to the right Change the threshold setting to High to increase the trig level to avoid false triggering e The use of the blue isolating ring mentionned before is mandatory if current less than appr 20 mA should be measured without influence of ground current noise This ring insulates the cable shield from the tube housing so that the high voltage cable only is connected to protective earth at one end i e at the generator If both ends of the cable are connected to protective earth there will be a fluctuating ground current floating in the shield that will affect the measurements and give unstable readings e The position of the probe in relation to other current noise sources is important to consider Specially please do not put the probe closer than app 20 cm from the tube since the electromagnetic field from the rotator in the tube can be picked up by the probe specially when the tube starts to rotate just before measurement Hint use the kV detector to gate the tube current measurement using the X ray signal as a trigger since this signal is much more noise free e Please note that the filament current does not normally affect the probe reading since its net current is zero in the HV cable Therefore also tube current measurement with the negative HV cable is possible even if this cable also supports the filament current itself e A8 meters extension cable EXT 1 is
4. 16 SE Extension cable 14 F Frequency range 16 General Rules 15 Green LED 7 Ground loops 14 Hints and Trouble shooting 14 HV cable capacitance 14 Inaccuracy 16 Introduction 4 Measurements 13 Measuring Range 16 N Negative current 14 Noise 14 O Operating temperature 16 Output 7 Piranha power supply 12 Polarity 7 Power ON 7 2010 10 2 0A MAS 3B User s Manual 18 Notice Notes MAS 3B User s Manual 2010 10 2 0A
5. 2 4 mA 30 34 mAs me mas mas s sarpus imeaoes masia Saos 10100005 Total fiter m 2 9 mm Al 2 52 mm Al mma Woms e CoRzOTOD Mana Shea oean Tube ma Tube mas Engene w AE paas mGy Pronta Prarra ra Prava g GG we re cate Tous Se Orsay Orewa Prata Puana i mi mi n fra baig ra xSSSSSS Rad 70 kV 300 mA 100 ms Piranha and MAS 3B 2010 10 2 0A MAS 3B User s Manual 1 INTRODUCTION A Presentation of the MAS 3B i Exposure rate l 0 07858 mGy s e Connection of MAS 3B to a MAS 3B connected to a mammo tube triggered _ mammo tube directly on the mA signal CAUTION Users of mAs meters must be aware of the potential damage to generators and electrical human hazards in the case of improper connection or failure of any part of the meter circuit The MAS 3 is intended for use only by those skilled in the calibration and repair of X ray machines Please read the section SAFETY PRECAUTIONS 15 gt for more safety rules MAS 3B User s Manual 2010 10 2 0A 1 INTRODUCTION A Presentation of the MAS 3B 2 FUNCTION AND CONNECTION 2 1 Connection of the MAS 3B Please be aware that high voltage may exist if the mA probe connection is not properly made Read the SAFETY PRECAUTIONS 15 gt chapter before you start measuring e Power down the X ray unit and turn OFF the MAS 3B Caution A Users of mAs met
6. MAS 3B Non invasive Tube Current Probe Adapter User s Manual English Version 2 0A RTI Electronics AB reserves all rights to make changes in the MAS 3B and the information in this document without prior notice RTI Electronics AB assumes no responsibility for any errors or consequential damages that may result from the use or misinterpretation of any information contained in this document Copyright 1993 2010 by RTI Electronics AB All rights reserved Content of this document may not be reproduced for any other purpose than supporting the use of the product without prior permission from RTI Electronics AB Contact Information World Wide RTI Electronics AB Fldjelbergsgatan 8 C SE 431 37 MOLNDAL Sweden Phone Int 46 31 7463600 Fax Int 46 31 270573 E mail Sales sales rti se Support support rti se Service service rti se Web site http www rti se Contact Information United States RTI Electronics Inc 1275 Bloomfield Ave Building 5 Unit 29A Fairfield NJ 07004 USA Phone 800 222 7537 Toll free Int 1 973 335 4200 Fax Int 1 973 335 1225 E mail Sales sales rtielectronics com Support support rtielectronics com Service service rtielectronics com Web site http www rti se RTI article number 9630510 00 E contents Intended Use of the MAS 3B Together with instruments from RTI Electronics AB it is to be used for independent service and quality control as well as measurements
7. TION AND CONNECTION Connection of the MAS 3B e Connect the MAS 3B to the Piranha or Barracuda See figure 2 4 and 2 5 for a complete setup of the MAS 3B system Figure 2 4 Figure 2 5 MAS 3 setup with Piranha as a trigger MAS 3 setup with MPD as a trigger Figure 2 4 shows a complete setup of the MAS 3 system together with the Piranha or Barracuda NOTE Make all connections without power on the instruments Place the MAS 3B probe at least 20 cm away from the tube to avoid disturbance from the tube rotation e Now connect the MAS 3B to the detector input of the Piranha or Barracuda using the included cable Attach the round Lemo female connector to the connector that is marked Lemo OUT on the probe and the other end to the electrometer input on your meter MAS 3B User s Manual 2010 10 2 0A 2 FUNCTION AND CONNECTION Connection of the MAS 3B e Turn ON the MAS 3B turning the round rotary switch to the Battery ON position Figure 2 6 Setup of front panel of MAS 3 e Check that the polarity switch is set to in Normal Select Battery On with the red rotary switch The green LED will now indicate that the MAS 3B is powered ON The Probe is now ready to use If the red LoBat LED lights up it indicates that the battery voltage is low Please recharge the MAS 3B before measuring Alternatively you can turn the rotary switch to Power USB On position and connect the USB cable to your 5 Volt power supply See Battery
8. available to further extend the cable e A good rule is that the mA waveform should be studied whenever checking the mA station Large inaccuracy can arise when small values are measured if the mA waveform information is not available If the value is lower than 10 mAs special attention must be drawn to how the charge supplied to the capacitance in the high voltage cable will influence the measuring result See picture below The easiest way to do this is to use the oRTIlgo Ocean waveform analyzer e Note that when using a PC connected to mains and at the same time a cable to the Piranha or Barracuda ground loops may arise that generates ground currents that affect the measurements It is recommended to connect wirelessly between the PC and meter or run a laptop PC on battery MAS 3B User s Manual 2010 10 2 0A 4 SAFETY PRECAUTIONS 15 4 SAFETY PRECAUTIONS 4 1 General Rules Only use the MAS 3B system if you are authorised to work with calibration and service of X ray equipment Always switch off the X ray generator and wait appr one minute before you make any connection or disconnection of the high voltage cables Do NOT expose the instruments to direct sunlight extremes of temperature and humidity or dew fall Do not exceed maximum current for the MAS 3B system 2000 mA e Do NOT forget to turn the MAS 3B adapter box off after use Note The MAS 3B is intended for service and quality control of diagnos
9. ers must be aware of the potential damage to generators and electrical human hazards in the case of improper connection or failure y of any part of the meter circuit The MAS 3B is intended for use only by d those skilled in the calibration and repair of X ray machines Please read SAFETY PRECAUTIONS 15 for more safety rules e Locate the HV cable Disconnect the anode cable connector see figure 2 1 and 2 4 Figure 2 1 Locate the anode cable and its connection to the tube 2010 10 2 0A MAS 3B User s Manual 2 FUNCTION AND CONNECTION Connection of the MAS 3B e Disconnect the HV cable Put the MAS 3B probe over the cable connector Please observe the right polarity It is indicated by the arrow on the probe from to If you do not find the polarity information do not be worried the MAS 3B has a polarity switch on the front panel See figure 2 6 Figure 2 2 Anode cable disconnection and connection of MAS 3B Note the polarity of the probe The arrow on the probe is pointing at the tube anode side MAS 3B User s Manual 2010 10 2 0A 2 FUNCTION AND CONNECTION Connection of the MAS 3B e Mount the blue insulation ring The ring insulates the lock nut from the strain relief guard This is to avoid ground currents See figure 2 3 Figure 2 3 Insulation ring should be placed between the lock nut and the strain relief guard e Tighten the lock nut firmly 2010 10 2 0A MAS 3B User s Manual 2 FUNC
10. he QABrowser will then update the display continuously during the exposure See Settings in the Piranha or Barracuda manual For more detail information of measurement please study the documentation for the software Don t forget to turn the rotary switch to Charge USB OFF position to turn off the MAS 3 Note that when using a PC connected to mains and at the same time a cable to the Piranha or Barracuda ground loops may arise that generates A fe 341 ground currents that affects the measurements It is recommended to either connect wirelessly between the PC and meter or run a laptop PC on battery 2010 10 2 0A MAS 3B User s Manual 3 MEASUREMENTS Measurements of the mAs and mA Value 3 2 Hints and Trouble shooting e f no current can be measured please check the direction of current Piranha or Barracuda CANNOT measure negative current The arrow on the probe should point at the tube anode You can use the Polarity switch on the front panel to change the polarity This make it very handy since you do not have to physically take apart the HV circuitry to rotate the probe to change polarity if it set up wrong in the first place e Please use All and put the Piranha or Barracuda in the X ray field to gate the measurements if it is a problem to hold the mAs value when using the single tube current mode This may happen because of current noise from the rotating anode engine You may also use the Meter Adjust part
11. nough current The Piranha charger provides enough current output for this mode Also any standard USB charger that provides at least 5V 1A could also be used but the power output from a PC USB port cannot since this port typically limits the current to 500 mA MAS 3B User s Manual 2010 10 2 0A 2 FUNCTION AND CONNECTION 13 Battery and Chargin 3 MEASUREMENTS 3 1 Measurements of the mAs and mA Value Setup the MAS 3B according to the section Connection of the MAS 3B 75 Power on the MAS 3B and then the Piranha or Barracuda Start the Ocean oRTlgo or QABrowser as described in the software manual and then select the appropriate Real time Meter display part of the software The example 1 here is for the QABrowser Start the QABrowser tap Measure Radiography Tube Current for the Barracuda you must also choose the EMM module to be able to read the current It is typically shown in the unit mA Tap Reset then 0 should be displayed The offset adjustment procedure for Piranha or Barracuda is finished and the MAS 3B is ready for measurements Now just perform an exposure and the QABrowser will show you readings of tube current mA and tube charge mAs You may also study the tube current waveform by tapping the Wave button The Piranha or Barracuda starts to measure when the mA signal is greater than approximately 0 1 mA when using the MAS 3B For long exposure times you may want to switch to the Continuous update mode T
12. robe The MAS 3B measure the electromagnetic field created by the cable when passing the measuring hole Accurate readings can be done independent of the high voltage cable position An isolation ring is provided when extremely low mA should be measured to avoid that ground currents in the HV cable shield could interfere with the true tube current value MAS 3B can both run continuous on USB power or on battery using built in rechargeable batteries The MAS 3B has built in second order DC 500 Hz low pass filter Normally the system is used with the kV probe for Piranha or Barracuda to use this detector to gate the mA and mAs value together with kV time dose dose rate and beam filtration and its waveform in one exposure This system is also preferable when adding an absolute mAs reference value for your mAs linearity test You can easily by using the software for Piranha or Barracuda tran sform your relative output measurement values to absolute mAs values even for small mAs measurements A benefit with this method is that you avoid large measurement errors for small mAs values This is often the case with ordinary mAs meters that is not sensitive to the current waveform Using the software a certain portion of the mA waveform can be selected using the radiation waveform as reference MAS 3B User s Manual 2010 10 2 0A 1 INTRODUCTION A Presentation of the MAS 3B aiU mae EN O18 0 A Oes Piemont Tube mA Tube mAs 30
13. sl navies ieee ee ee whee 15 5S SPECIFICATIONS a a aaa aae aa a n aeaa a aa e Aaaa aoada ienasi disd 16 5 1 General Specifications for MAS 3B eccecceeeeeteeeeeeeeeenreteeeeeaeeseeeeeeeeeatens 16 WIN OX aao aa a a a a 17 Note For a full description of the Piranha or Barracuda see the Piranha or Barracuda Reference Manual That Manual can be found on the Product CD or be downloaded from RTI s website www rti se The manual is available both as PDF and Browser format The Browser HTML format is recommended for easy searching 2010 10 2 0A MAS 3B User s Manual 1 INTRODUCTION EE Presentation of the MAS 3B 1 INTRODUCTION 1 1 A Presentation of the MAS 3B The MAS 3B is a non invasive mA and mAs probe system for use together with the Piranha or Barracuda The system provides a way to measure the tube mA and mAs on any X ray equipment The MAS 3B have a very sensitive current probe based on the IPCT Integrated Parametric Current Transformer method that is 100 times more precise than Hall effect device The MAS 3B probe system can measure from 0 1 mA to 2000 mA The mA waveform can also be collected and displayed using the software for Piranha or Barracuda This new updated model is self contained and only use an interface cable to the Piranha or Barracuda The measuring hole is 82 mm so it accepts all major mammo and radiography HV cables Passing the high voltage HV cable through the probe aperture connects the current p
14. tic X ray equipment It is not intended for use during or together with diagnostic examinations of patients RTI Electronics AB takes no responsibility for misuse of the MAS 3B or use together with products that the MAS 3B is not intended for RTI Electronics AB assumes no responsibility for customers not following these safety precautions 2010 10 2 0A MAS 3B User s Manual 4 SAFETY PRECAUTIONS General Rules 5 SPECIFICATIONS 5 1 General Specifications for MAS 3B Specifications are valid after a warm up time of one minute and presuming reference conditions Reference conditions Temperature 18 Ct 423 C Relative humidity Specifications 0 01 at least 9999 mAs Inaccuracy 1 or 40 02 mA Maximum dimensions of high voltage 82 mm HV cable Voltage insulation 5 kV current conductor to ground and relative humidity at lt 80 relative humidity MAS 3B User s Manual 2010 10 2 0A Index 17 Index aR Range 16 Note Rechargeable 12 Page references in this Index points to the Red LED 7 first page of the section it is mentioned not S the exact page Safety 15 Specifications 16 A Storage temperature 16 Accuracy 16 T Z B Trouble shooting 14 Bandwidth 16 U Battery 12 16 Battery life 16 USB charger 12 Battery type 16 z W C Weight 16 Calibration factor 16 Work flow 13 Capacitance inthe HV cable 14 D Y Charging 12 Connection of the MAS 3B 7 Yellow LED 7 12 D Dimensions
15. tudies of the built in help function in measurement software or on request ina course provided by the manufacturer The product is intended to be used inside X ray rooms ready for clinical use and can safely be left switched on and in any measuring mode in the vicinity of patients The product is NOT intended to be used for direct control of diagnostic X ray equipment performance during irradiation of a patient so that patients or other unqualified persons can change settings of operating parameters during and immediately before and after measurements MAS 3B User s Manual 2010 10 2 0A Contents EN Table of Contents 1 INTRODUCTION fisidesnis cocicicesiices centecsessces ccs scccsuesesveneencasesueewdaccauucsuacaseee 4 1 1 A Presentation of the MAS 3B uu cccccccccccccccccececeseeseseeesesesssssaeaeeeeeeeeeeeeeeees 4 2 FUNCTION AND CONNECTION c eceseeeseeeeseseseeeeeeeeeeeeeeeeees 7 2 1 Connection of the MAS 3B drina a AGE 7 2 2 Battery and Charging scsi cecvcrieus oree ete eget nh aieteste a 12 3 MEASUREMENT Sivnncisccccccic cscs decesccsecccedeccecsssscessocdscsessscseeseecssaesceccceuns 13 3 1 Measurements of the MAS and MA Value cccceceeeeeeeeeeeeeeeeeeesseseeseenaes 13 3 2 Hints and Trouble Shooting ceeeseeeeseeeeeneeeeeeeeeesneeeseneeeeeeeeeesnneesenaeees 14 4 SAFETY PRECAUTIONG 2 s0seseeeeeseseseeeeeeeeenenenseeeeeeeeeeeeees 15 4 1 General RUO Atieceii
Download Pdf Manuals
Related Search