Piranha MAS-2 User`s Manual - English - 1.0B
Contents
1. and cable e Initial Offset Adjustment shows how to do final adjustments before starting to measure 2 1 Function of the Piranha MAS 2 The Piranha MAS 2 is an adapter for use together with a current clamp probe the PROVA 15 and the Piranha electrometer The PROVA 15 is powered on with the range switch NOTE The PROVA 15 must be in the 4 A range when used together with the Piranha 2 2 Connection of the Piranha MAS 2 The Piranha MAS 2 is connected to the detector input of the Piranha using the round Lemo connector The PROVA 15 is connected using the two banana connectors in the other end of the cable NOTE Make all connections to the Piranha MAS 2 the Piranha and the PROVA 15 before powering on the instruments The PROVA 15 must be in the range 4 A when used together with Piranha See figure below ACDC mA CURRENT PROBE LOW BATTERY Pone ACIDE 10mVIA Connect together A HV cable max diameter 23 mm Connect to the Piranha 2008 09 1 0B Piranha MAS 2 User s Manual 2 FUNCTION AND CONNECTION Initial Offset Adjustment Procedure 2 3 Initial Offset Adjustment Procedure Make sure that all instruments are switched off Press the jaw trigger and clamp the jaws onto the high voltage cable Check for correct polarity Connect the Piranha MAS 2 the PROVA 15 and the Piranha according to previous figure Power on the PROVA 15 range 4 A and the Piranha Press the ZER2. iis cicssccsis n ens vey absuab Coes es diavecdendedeesveeoias cs 6 5 SPECIFICATIONS cccccccsscesecesssesceesseceauseeenssesueneesesaneeeeenagseeeneseessanens 7 5 1 General Specifications for Piranha MAS 2 0 ccccceeceeeceeceeeeeeeteeeeeeteeaaes 7 deR ste teava sesso ec a a a meee aa cuawcaecaeteedvcesstestaeahvigeceuont ts 8 Note For a full description of the Piranha see the Piranha 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 2008 09 1 0B Piranha MAS 2 User s Manual 4 1 INTRODUCTION General 1 INTRODUCTION 1 1 General The Piranha MAS 2 is an adapter for use together with a stable current clamp probe the PROVA 15 and the Piranha X ray multimeter It provides a non invasive way to measure tube current mA and tube charge mAs on X ray equipment The current probe is simply clamped on the high voltage lead and is then ready for measurements The greatest advantage is that the method is easy to use and that it is safe Furthermore there is no need to disconnect the high voltage cables to be able to measure tube current The Piranha MAS 2 can measure from 10 mA to 4000 mA when used together with the Piranha By using Free run or Timed update modes the Piranha MAS 2 is able to measure even lower with an inaccuracy of 1 2 mA A
3. measurements 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
4. O on the PROVA 15 to cancel internal DC offset in the clamp probe In the QABrowser select the appropriate Real time Meter display e g tap Measure Radiography Tube Current and 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 is finished and the Piranha MAS 2 with the PROVA 15 is ready for measurements 3 MEASUREMENTS 3 1 Measurements of the mAs and mA value 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 starts to measure when the mA signal is greater than approximately 10 mA when using the Piranha MAS 2 For long exposure times you may want to switch to the Continuous update mode The QABrowser will then update the display continuously during the exposure See Settings in the Piranha manual 4 SAFETY PRECAUTIONS 4 1 General Rules e Do NOT use the Piranha MAS 2 on a circuit with a voltage of higher than 600 V AC e Do NOT remove the battery compartment cover when attempting to measure current e Do NOT connect the Piranha to an oscilloscope DVM and simultaneously use the same oscilloscope DVM connected to the banana terminals of the PROVA 15 probe e Do NOT make battery replacement with the Piranha MAS 2 powered ON e Do NOT expose the instrument to di
5. Piranha MAS 2 Non invasive Tube Current Probe Adapter for the Piranha User s Manual English Version 1 0B RTI Electronics AB reserves all rights to make changes in the Piranha MAS 2 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 2003 2008 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 Fl jelbergsgatan 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 i contents Intended Use of the Piranha MAS 2 Together with instruments from RTI Electronics AB it is to be used for independent service and quality control as well as
6. manual studies of the built in help function in measurement software or on request in a 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 Piranha MAS 2 User s Manual 2008 09 1 0B Contents 3 Table of Contents 4 INPRODUG TION a aeaaea aaaea aaa rae a r Poa TAARE E EROE HTE Aana 4 1 1 Ge n ral aose a e a a A aaaea 4 2 FUNCTION AND CONNECTION 0cccccccccccssccessssesssseeesseeseeuseeenaeeees 5 2 1 Function of the Piranha MAS 2 cccccccssssescesccceceeeecesaeeaeeeeeeeeeseeeeaneaaenens 5 2 2 Connection of the Piranha MAS 2 cccccccccccececeseeeseeceeeeeeeeeseauenaeeeseeeeees 5 2 3 Initial Offset Adjustment Procedure c ccccececceceeeeeeeneceeeeeeenaeeeeeeeeeneaness 6 3 MEASUREMENTS wisiscccicicdccccccicde dececcccdsdcedeccteaccdetvesendvecseccdsuccessancucuaas 6 3 1 Measurements of the MAS and MA value ccccccecesesseeseeceeeeeeeeeeeaneeaeeens 6 4 SAFETY PRECAUTIONG c ccccccccseccssseeecessesecnesseeeaueeeensseseeueeesnaeeens 6 4 1 General RUS s
7. rect sunlight extremes of temperature and humidity or dew fall e Do NOT forget to turn the Piranha MAS 2 off after use RTI Electronics AB takes no responsibility for misuse of the Piranha MAS 2 or use together with products that the Piranha MAS 2 is not intended for RTI Electronics AB assumes no responsibility for customers not following these safety precautions Piranha MAS 2 User s Manual 2008 09 1 0B 4 SAFETY PRECAUTIONS General Rules 5 SPECIFICATIONS For PROVA 15 specifications see the PROVA 15 User s Manual 5 1 General Specifications for Piranha MAS 2 Specifications are valid after a warm up time of one minute and presuming reference conditions All specifications together with the PROVA 15 probe unless otherwise stated Reference conditions 18 C to 23 C Relative humidity Specifications Current range Piranha MAS 2 output 10 4000 mA Using 4 A range Inaccuracy 3 at 250 mA 5 or 2 mA between 10 4000 mA Scale factor Piranha MAS 2 output 1 nA mA 0 1 Maximum diameter Appr 23 mm of high voltage cable land relative humidity at lt 80 relative humidit Battery life for PROVA 15 Appr one year of use or 40 hours Battery type for PROVA 15 alkaline IEC R6 size AA 1 5 V batteries 2008 09 1 0B Piranha MAS 2 User s Manual Eer Index Index Note Page references in this Index points to the first page of the section it is mentioned not the exact page Accuracy 7 Ba
8. special calibration makes it possible to read current and charge directly in mA and mAs in the Piranha QABrowser and oRTIgo display The mA waveform can also be collected and displayed This method is also preferable when adding an absolute mAs reference value for your mAs linearity test You can easily transform by using ORTIgo your relative output measurement values to absolute mAs values even for low mAs measurements A benefit with this method is that you avoid large measurement errors for low mAs values This is often the case with ordinary mAs meters that are not sensitive to the current waveform Using oRTIgo a certain portion of the mA waveform can be selected using the radiation waveform as reference The current clamp probe PROVA 15 is also a general purpose current meter The PROVA 15 three range voltage output can be used together with an oscilloscope or DVM Currents between 0 30 A in the frequency range DC to 1 kHz can be measured ZERO AC DC mA CURRENT PROBE Ss m OFF RANGE OUTPUT LOW BATTERY POWER 400ma ACDC invia OL _44_ acoc 100 mvia 30A acoc 1omvia Se The PROVA 15 current probe The Piranha MAS 2 adapter cable Piranha MAS 2 User s Manual 2008 09 1 0B 2 FUNCTION AND CONNECTION 5 2 FUNCTION AND CONNECTION The overview of Piranha will be divided into three different main parts e Function general overview e Connection how to connect the probe
9. ttery 7 Battery Life 7 Connection of the Piranha MAS 2 5 Function of the Piranha MAS 2 5 Inaccuracy 7 Initial Offset Adjustment Procedure 6 Measurements 6 Measuring Range 7 0 Offset Adjustment Procedure 6 Opertaing systems 4 Range 7 Safety 6 Specifications 7 W Windows 2000 4 Windows 95 4 Windows 98 4 Windows Me 4 Windows NT 4 Windows XP 4 Work flow 6 Piranha MAS 2 User s Manual 2008 09 1 0B
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