A3 / A4 / A5 / A6 Spherical Ionization Chambers
Contents
1. EXC n A3 A4 A5 A6 Spherical lonization Chambers REF 92717 92715 92724 92716 Standard SS i User Manual G www Standard Imaging com EXC y A3 A4 A5 A6 Spherical lonization Chambers REF 92717 92715 92724 92716 STANDARD IMAGING INC TEL 800 261 4446 7601 Murphy Drive TEL 608 831 0025 Middleton WI 53562 2532 FAX 608 831 2202 Feb 2005 02005 Standard Imaging Inc DOC 80360 03 General Precautions Warnings and Cautions alert users to dangerous con ditions that can occur if instructions in the manual are not obeyed Warnings are conditions that can cause injury to the operator while Cautions can cause dam age to the equipment WARNING Electrical shock hazard when connected to 300 V bias supply CAUTION Proper use of this device depends on careful reading of all instructions and labels CAUTION Do not drop mishandle or disassemble unit since it may result in change of calibration fac tor or damage Refer all servicing to qualified individuals CAUTION Do not sharply bend triax cable Damage to the cable may result in high leakage currents Table of Contents PAGE 4 General Precautions 5 General Operation 6 Parts and Accessories 7 Features and Specifications 11 Service Notes 12 Service Policy 13 Customer Responsibility 14 Warranty 7601 MURPHY DRIVE MIDDLETON WI 53562 2532 USA WWW STANDARDIMAGING COM Standard Imaging E XL Il N2. 5 Verify the leakage of the ionization chamber is within the manufacturer s stated acceptable limits If measured in the presence of background sources note that this signal will add to the leakage of the chamber 6 Some electrometers such as the Standard Imaging MAX 4000 Electrometer allow the user to zero the device at any time If desired perform this system zeroing now 7 Check the system leakage Take a reading without ex posing the chamber to radiation This reading should be less than 0 1 of the final signal expected If it is not the leakage should be subtracted from the signal 8 Measure atmospheric temperature and pressure For well chambers measure the temperature in the well of the chamber 9 Insert the ion chamber and take at least 3 measurements Generally the measurements should not be moving in only one direction i e three readings that continue to drop and hence may not yet be stabilized If a current measurement is done allow sufficient time for value to stabilize 10 Analyze the data taking into account the average of the readings system leakage temperature pressure corrections calibration factors and any other appropriate corrections to be made Keep in mind that the calibration factor consists of the electrometer calibration and the ion ization chamber calibration factor 11 When all measurements are completed set bias volt age to 0 VDC turn off the electrometer and disconnect the ion
3. Inc or if the product has been subject to abuse misuse negligence or accident Product Warranty Period Standard Imaging lonization Chambers eveals Standard Imaging Well Chambers 2years Standard Imaging Electrometers 2years Standard Imaging Heat Software Products y All Other Standard ear Imaging Products y Standard Imaging Custom Product 90 days Consumables 90 days Serviced Product 90 days Resale Products As defined by the Original Equipment Manu facturer ADCL Product CalibrationADCL Product Calibration Standard Imaging uses the UW ADCL for recalibrations required under war ranty 0 90 days 100 of ADCL Calibration Costs 91 182 days 75 of ADCL Calibration Costs 183 365 days 50 of ADCL Calibration Costs 366 639 days 25 of ADCL Calibration Costs days from date of shipment to customer Standard Imaging s sole and exclusive obligation and the purchaser s sole and exclusive remedy under the above warranties are at Standard Imag ing s option limited to repairing replacing free of charge or revising labeling and manual content on a product 1 which contains a defect covered by the above warranties 2 which are reported to Standard Imaging Inc not later than seven 7 days after the expiration date of the warranty period in the table 3 which are returned to Standard Imaging Inc promptly after discovery of the defect and 4 which are f
4. General Operation The Exradin A3 and A4 Spherical Chambers are attached to a 1 5 m length of low noise flexible triaxial cable that is terminated by a triaxial or coaxial connector The Exradin A5 and A6 Spherical Chambers utilize the exact same tri axial cable however itis only 22 9 cm long and concealed inside the chamber s stem The cable is terminated by the triaxial connector mounted directly to the end of the stem In either case the collector of the chamber is common with the center wire of the cable and the center contact of the connector The guard is common with the inner cable braid and the middle connector contact in the case of triaxial connectors and the connector body in the case of coaxial connectors The shell outer electrode usually ground is common with the outer braid ofthe cable and the connec tor body in the case of triaxial connectors and the pigtail extending out the rear of coaxial connectors Operating Instructions 1 With nothing connected to the input jack of the elec trometer turn the power on and wait at least 15 minutes for warm up 2 Verify the leakage of the electrometer is within the manufacturer s stated acceptable limits 3 Connect the onization chamber to the electrometer and apply 100 voltage bias 4 Allow the electrometer and onization chamber system at least 10 minutes to stabilize making certain that all cabling is lying flat and unkinked General Operation Continued
5. all C552 Co 60 11 0 mm wall Delrin A5 8 5 mm wall Delrin A6 None Connector Triaxial BNC Plug 2 Lug Male and protective cap connected by chain standard others available upon request Low Noise Triaxial Cable 1 5 m long A3 amp A4 only 50 ohms 29 pF ft Nominal Inherent Leakage Currents 10 A Maximum Polarizing Potential 1000 V Temperature Range 15 32 C Humidity Range 20 80 non condensing Pressure 650 to 770 mm Hg Features and Specifications Recommended Bias for Chamber Use A3 300V A4 500V A5 800V A6 1000V Nominal Collection Efficiency 100 at recommended bias Product Standards IEC 60601 1 u 1 Designed to Meet 8 Notes Notes 10 Service Notes Buildup Caps To remove buildup caps from these ionization chambers use the following procedure Hold the buildup cap in one hand allowing the chamber handle to hang freely Insert a small screwdriver or similar tool into the neck hole and simply pry the cap open The prying force is to act between the cap and handle In this manner buildup caps are read ily removed without stressing the chamber proper It is important that the handle is not held while opening buildup caps Hold chamber by cap and permit handle to respond freely to prying force Stem The stem is an integral part of the ionization chamber assembly and is not to be removed under any circum stances Venting The chamber volume is vented to the ambi
6. ent via 2 vent holes located on the neck of the shell Service and Maintenance There are no user serviceable parts within these ionization chambers Under no circumstance should the user attempt to repair or disassemble the chamber and or connector as the warranty will become void and the calibration factor will change Under normal use the chambers should provide years of trouble free service If assistance is desired in the proper disposal of this product including accessories and components after its useful life please return to Standard Imaging 11 Service Policy If service including recalibration is required please con tact Standard Imaging s Customer Service department by phone or email prior to shipping the product Standard Imaging s Customer Service and Technical Service staff will attempt to address the product issue via phone or email If unable to address the issue a return material authoriza tion RMA number will be issued With the RMA number the product can be returned to Standard Imaging It is the responsibility of the customer to properly package insure and ship the product with the RMA number clearly identi fied on the outside of the package The customer must immediately file a claim with their carrier for any shipping damage or lost shipments Return shipping and insurance is to be pre paid or billed to the customer and the customer may request a specific shipper Items found to be out of
7. ization chamber Parts and Accessories REF Description 72106 A3 Co 60 Buildup Cap 2 3 mm C552 72107 A3 Buildup Cap 5 6 mm Delrin 72108 A3 Buildup Cap 8 5 mm Delrin 72109 A3 Buildup Cap 11 5 mm Delrin 72110 A4 Co 60 Buildup Cap 2 0 mm C552 72111 A4 Buildup Cap 11 0 mm Delrin 72113 A5 Buildup Cap 8 5 mm Delrin 70004 10 m Triaxial Extension Cable BNC connectors with protective caps Features and Specifications VENT HOLES 2 C Calibration Stem Collecting Factor MODEL R r w D Diameter Volume R nc mm mm mm mm mm cc nominal A3 97 10 0 25 7 9 7 9 3 6 0 9 A4 19 1 2 0 0 50 9 5 9 5 30 0 09 A5 284 30 3 0 15 9 15 9 100 0 03 A6 57 22 58 3 0 22 2 15 9 800 0 004 nominal calibration factors for energies greater than 200 keV Collecting Volume See table Collector Diameter 2r see table for values of r Shell Wall Thickness w see table for values of w Shell Collector and Guard Material Shonka air equivalent plastic C552 Stem A3 amp A4 Black phenolic see table for diameters length is 22 9 cm not removable Stem A5 amp A6 Delrin see table for diameters length is 22 9 cm not removable Waterproof No this sort of chamber is not used in water Venting Two holes open to the ambient are located on the neck of the chamber Buildup Caps Available A3 2 3 mm wall C552 Co 60 5 6 mm wall Delrin 8 5 mm wall Delrin 11 5 mm wall Delrin A4 2 0 mm w
8. ound to be defective upon exami nation by Standard Imaging Inc Transportation related charges including but not limited to shipping customs tariffs taxes and brokerage fees to Standard Imaging are the buyer s responsibility This warranty extends to every part of the product except consumables fuses batteries or glass breakage Standard Imaging Inc shall not be otherwise liable for any damages including but not limited to incidental damages consequential damages or special damages Repaired or replaced products are war ranted for the balance of the original warranty period or at least 90 days This warranty is in lieu of all other warranties express or implied whether statutory or otherwise including any implied warranty of fit ness for a particular purpose In no event shall Standard Imaging Inc be liable for any incidental or consequential damages resulting from the use misuse or abuse of the product or caused by any defect failure or malfunction of the product whether a claim of such dam ages is based upon the warranty contract negligence or otherwise This warranty represents the current standard warranty of Standard Imaging Inc Please refer to the labeling or instruction manual of your Standard Imaging Inc product or the Standard Imaging Inc web page for any warranty conditions unique to the product 14 Sel
9. stomer should seek advice from Standard Imaging Inc prior to such re pair or replacement If this product is in need of repair it should not be used until all repairs have been made and the product is functioning properly and ready for use After repair the product may need to be calibrated The owner of this product has sole responsibility for any malfunction resulting from abuse improper use or maintenance or repair by anyone other than Standard Imaging Inc The information in this manual is subject to change without notice No part of this manual may be copied or reproduced in any form or by any means without prior written consent of Standard Imaging Inc 13 Warranty Standard Imaging Inc sells this product under the warranty herein set forth The warranty is extended only to the buyer purchasing the product directly from Standard Imaging Inc or as a new product from an authorized dealer or distributor of Standard Imaging Inc For a period provided in the table below from the date of original delivery to the purchaser or a distributor this Standard Imaging Inc product provided in the table is warranted against functional defects in design materials and workmanship provided it is properly operated under conditions of normal use and that repairs and replacements are made in accordance herewith The foregoing warranty shall not apply if the product has been altered disassembled or repaired other than by Standard Imaging
10. warranty are subject to a minimum service fee of 1 hour labor excluding recalibrations for diagnostic efforts and require a purchase order PO before service is performed With concurrence from customer the product may be re placed if it is unserviceable or if the required service is cost prohibitive Products incurring service charges may be held for payment Standard Imaging does not provide loaner products See the Standard Imaging Warranty and Customer Responsibility for additional information 12 Customer Responsibility This product and its components will perform properly and reliably only when operated and maintained in accordance with the instructions contained in this manual and accom panying labels A defective device should not be used Parts which may be broken or missing or are clearly worn distorted or contaminated should be replaced immediately with genuine replacement parts manufactured by or made available from Standard Imaging Inc CAUTION Federal law in the U S A and Ca nadian law restrict the sale distribution or use of this product to by or on the order of a licensed medical practitioner The use of this product should be restricted to the supervision of a qualified medical physicist Measurement of high activity radioactive sources is potentially hazardous and should be performed by quali fied personnel Should repair or replacement of this product become necessary after the warranty period the cu
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