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CRC
RADIOISOTOPE DOSE
CALIBRATOR
OWNER'S MANUAL
Capintec, Inc.
Sales and Marketing
and Customer Support
6 Arrow Road
Ramsey, NJ 07446
Phone (800) ASK-4CRC
Fax (201) 825-1336
Capintec, Inc.
Service Center
620 Alpha Drive
Pittsburgh, PA 15238
Phone (800) 227-6832
Fax (412) 963-0610
Copyright
®
CRC
is a registered trademark of Capintec, Inc.
U.S. Patents - 3,748,476 and 3,840,745
ALL RIGHTS RESERVED
Manual Stock No. 9250-0068
Rev. C – January 2008
®
-712MX
©
1992 Capintec, Inc.
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Summary of Contents for Capintec CRC-712MX
- Page 1 Pittsburgh, PA 15238 Phone (800) 227-6832 Fax (412) 963-0610 © Copyright 1992 Capintec, Inc. ® is a registered trademark of Capintec, Inc. U.S. Patents - 3,748,476 and 3,840,745 ALL RIGHTS RESERVED Manual Stock No. 9250-0068 Rev. C – January 2008...
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Page 3: Table Of Contents
® CAPINTEC, INC. -712MX TABLE OF CONTENTS PREFACE SAFETY ..........................1-1 SYMBOL DEFINITIONS ....................1-1 WARNING AND CAUTION LABELS .................1-1 CAUTIONS AND NOTES ....................1-3 GENERAL SAFETY TIPS....................1-4 FUNCTIONAL & TECHNICAL DESCRIPTION ..............2-1 FUNCTIONAL DESCRIPTION ..................2-1 FEATURES........................2-1 TECHNICAL DESCRIPTION.....................2-3 Warm Up Period......................2-3 Environment Requirements....................2-3 Power Requirements......................2-3... - Page 4 ® CAPINTEC, INC. -712MX Daily Tests ........................5-1 Quarterly Tests ......................5-3 Annual Tests........................5-5 MEASUREMENT PROCEDURES ..................6-1 GENERAL ......................... 6-1 PRE-MEASUREMENT PROCEDURES................6-1 PRESET ISOTOPE MEASUREMENT ................6-1 OTHER ISOTOPE MEASUREMENTS................6-2 DOSE ASSAY PROCEDURE ................... 6-2 ADDITIONAL CALIBRATION NUMBERS ................. 6-3 Direct Calibration with Certified Standard Sources............6-3...
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Page 5: Preface
Every effort has been made to insure that the information in this document is complete, accurate, and up-to-date. Capintec, Inc. assumes no responsibility for the results of errors beyond its control. Mention of products manufactured by other companies does not necessarily constitute endorsement by Capintec, Inc. - Page 6 ® CAPINTEC, INC. -712MX IMPORTANT SAFETY INFORMATION ® The CRC -712MX measurement system has been carefully designed to give you years of safe and reliable performance. As with all electrical equipment, however, there are basic precautions you must observe to avoid injuring yourself, the patient or damaging the equipment.
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Page 7: Safety
® CAPINTEC, INC. -712MX CHAPTER 1 SAFETY ® These warnings and instructions for use form an integral part of the CRC -712MX and must therefore be kept available for consultation at all times. Precise compliance with the instructions is an essential condition for normal use, correct application and thus safety of the user. - Page 8 ® CAPINTEC, INC. -712MX Figure 1-2 Located on the chamber are 2 labels. The first label (Figure 1-3) contains statements denoting not to remove the cover because there are no adjustments that the user can perform in the chamber. Figure 1-3 The second label (Figure 1-4) is located in three places (on the bottom of the chamber, on the 150 Volt Battery pack inside the chamber &...
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Page 9: Cautions And Notes
® CAPINTEC, INC. -712MX CAUTIONS AND NOTES CAUTION Only qualified/trained personnel should operate this unit. CAUTION If the equipment is used in a manner not specified in this manual, the protection provided by the equipment may be impaired. CAUTION No internal adjustments inside the chamber or readout that may be performed by the user within the conditions of the warranty. -
Page 10: General Safety Tips
The user should always verify the validity of any measurement or test result in order to minimize measurement errors. NOTE It is recommended that periodic re-calibration of the unit be performed by Capintec’s Authorized Service Center to guarantee that the instrument's high reliability is maintained. GENERAL SAFETY TIPS •... -
Page 11: Functional & Technical Description
® CAPINTEC, INC. -712MX CHAPTER 2 FUNCTIONAL & TECHNICAL DESCRIPTION FUNCTIONAL DESCRIPTION ® The CRC -712MX Radioisotope Dose Calibrator provides a precise, accurate, fast and very convenient method of measuring the activity of a radioisotope at the time and place of its application. - Page 12 ® CAPINTEC, INC. -712MX • Reliable measurements with a resolution as low as .001 millicuries (.0001 giga- becquerels) and a top range of 800 Curies (20.00 tera-becquerels) are provided for most radioisotopes. • The calibration numbers for 12 radionuclides are provided in Appendix II of the owner’s manual.
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Page 13: Technical Description
® CAPINTEC, INC. -712MX TECHNICAL DESCRIPTION Warm Up Period Approximately 30 minutes should be allowed for the instrument to stabilize. While the instrument is warming up, it is strongly recommended that you become familiar with the ® -712MX. Note: For optimum performance, the unit should be left powered at all times. This greatly... -
Page 14: Dimensions
® CAPINTEC, INC. -712MX Circuit Protection Power line filter, transient voltage suppresser, and power line fuse Power Connector and Cable A grounded 3-prong plug cord for the instrument that is approved for use at the user's site must be used. -
Page 15: Performance
® CAPINTEC, INC. -712MX Performance Activity Range There are six standard ranges whose full-scale values are as follows: Curies Becquerels 1.999 mCi .1999 GBq 19.99 mCi 1.999 GBq 199.9 mCi 19.99 GBq 1.999 Ci 199.9 GBq 19.99 Ci 1.999 TBq 799.9 Ci... - Page 16 ® CAPINTEC, INC. -712MX Shielding: Personnel Protection Shield of 3.2mm (1/8in) mechanically reinforced high density lead shielding; with 1Ci of Tc99m in the chamber, the exposure 50cm in front of the instrument is less than 0.5mR/min. Overall Accuracy Overall accuracy of the calibrator is determined by the accuracy of: •...
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Page 17: General Operating Instructions
® CAPINTEC, INC. -712MX CHAPTER 3 GENERAL OPERATING INSTRUCTIONS GENERAL This section describes the features and general operating procedures for the front panel controls and the back panel connectors. PANEL DESCRIPTIONS Front Panel General selection and control functions are briefly described. The specific function of each control will be provided in the appropriate sections of this manual. - Page 18 ® CAPINTEC, INC. -712MX Note: The optional printer interface must be installed within the calibrator to obtain the above output data. Isotope Select Push-Buttons Eight preset calibration settings are provided for commonly used isotopes. These buttons are interlocked with the BKG, OTHER, TEST and ZERO push-buttons for one-at-a-time operation.
- Page 19 ® CAPINTEC, INC. -712MX Figure 3-1 CRC-712MX Front Panel January 08 GENERAL OPERATING INSTRUCTIONS 3 - 3...
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Page 20: Back Panel
® CAPINTEC, INC. -712MX Back Panel ® Functional description of the features located on the back panel of the CRC -712MX. On/Off Switch = Power on position, = Power off position For optimum performance, the unit should be left ON at all times. - Page 21 ® CAPINTEC, INC. -712MX Figure 3-2 CRC-712MX Back Panel January 08 GENERAL OPERATING INSTRUCTIONS 3 - 5...
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Page 23: System Setup
Should the instrument be received in a damaged condition, save the shipping container and the packing material and request an immediate inspection by the carrier. Capintec, Inc. is not responsible for the damage, which occurs during shipment but will make every effort to help obtain restitution from the carrier. -
Page 24: Assembly
® CAPINTEC, INC. -712MX The following equipment should be found upon unpacking the optional Printer carton: • Power Supply (If Roll printer ordered) • Printer Ribbon • Communications Cable • Roll Paper (If Roll printer ordered) Note: If Test Sources are ordered, they will be shipped separately. -
Page 25: Environment Requirements
® CAPINTEC, INC. -712MX ENVIRONMENT REQUIREMENTS The instrument should be located where the level of the background radiation is as low and as constant as possible. The instrument should be located where the temperature is stable within a range of +50°F to +85°F (+10°C to +30°C) and the maximum relative humidity is 90% non-condensing to... -
Page 26: Initial Turn On Procedures
If the communications program or the printer fails to operate, review the installation procedure in the Owners manual for the communication program or the printer. If the problem persists, contact Capintec’s Authorized Service Center for assistance. ACCEPTANCE TESTING For the initial Quality Assurance Acceptance Test, all of the quality assurance tests specified in CHAPTER 5: QUALITY ASSURANCE AND ACCEPTANCE TESTING;... -
Page 27: General Operational Setup
® CAPINTEC, INC. -712MX GENERAL OPERATIONAL SETUP ® Two configuration changes may be preferred or required for normal operation of the CRC 712MX. • Locking the Units of measurement in the Curie or Becquerel mode, and • Reassignment of one or more of the preset isotope selection push-buttons. -
Page 28: Reassignment Of A Preset Push-Button
Capintec.) Note: If the RS-232 data-logging printer option is used, the program EPROM located in the readout unit will have to be changed. Consult Capintec’s Authorized Service Center concerning custom program EPROMs for the different isotope selections. - Page 29 ® CAPINTEC, INC. -712MX Figure 4-3 January 08 SYSTEM SETUP 4 - 7...
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Page 31: Quality Assurance & Acceptance Testing
® CAPINTEC, INC. -712MX CHAPTER 5 QUALITY ASSURANCE & ACCEPTANCE TESTING GENERAL ® To insure proper operation of the CRC -712MX, the following quality assurance tests should be preformed at the indicated intervals. ACCEPTANCE TESTING For the initial Quality Assurance Acceptance Test, all of the following tests must be ®... - Page 32 ® CAPINTEC, INC. -712MX Background Adjustment This procedure should be performed at least once every day the instrument is used. It is important to understand that this function does not provide a quantitative measurement of background radiation. The value indicated on the display when the BKG push-button is depressed is the relative change in background radiation since the last adjustment.
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Page 33: Quarterly Tests
® CAPINTEC, INC. -712MX Test with a Reference Source It is recommended to use a source that has a long half-life such as Cs137 (approximately 100µCi [3.7MBq]) sealed in a plastic vial. Always use the same Reference Source (i.e., Bench-mark Source). - Page 34 ® CAPINTEC, INC. -712MX 7. Record the number appearing on the Calibration Control dial. The number recorded in Step 7 should coincide with the calibration number assigned to the preset button used in Step 2. This can be checked by referring to the Calibration Card supplied with the unit or Appendix II of this manual.
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Page 35: Annual Tests
® CAPINTEC, INC. -712MX Annual Tests The Accuracy Test should be performed semi-annually (at least annually) to ensure the continued accuracy of the instrument. Accuracy Test The accuracy of the instrument should be verified using appropriate Reference Standard Sources such as Cs137, Co57 and Co60. The activity of these Standard Sources should be sufficient to obtain precise measurements at approximately those levels normally encountered. -
Page 37: Measurement Procedures
® CAPINTEC, INC. -712MX CHAPTER 6 MEASUREMENT PROCEDURES GENERAL Instructions for the measurement of a radioisotope sample or a radiopharmaceutical dose are given in this section. PRE-MEASUREMENT PROCEDURES The Quality Assurance Daily Test needs to be performed each working day, prior to the measurement of any radioisotope sample or radiopharmaceutical dose that may be administered to a patient. -
Page 38: Other Isotope Measurements
® CAPINTEC, INC. -712MX 5. Record the activity measurement on the appropriate form or press the PRINT button on the front panel to obtain a printout of the measurement (printer option required). OTHER ISOTOPE MEASUREMENTS The following procedure should be used for the other radioisotopes that do not have a preset push-button. -
Page 39: Additional Calibration Numbers
ADMINISTRATION. ADDITIONAL CALIBRATION NUMBERS Radioisotopes other than those whose calibration numbers are supplied by Capintec may also be measured by the calibrator. New calibration numbers may be derived by either “direct” calibration with Standard Reference Sources or by “intercomparison” of activity ®... -
Page 40: Intercomparison Calibration With A 12 Atmosphere Chamber
® CAPINTEC, INC. -712MX Intercomparison Calibration with a 12 Atmosphere Chamber 1. Verify that the Zero and Background adjustments of the calibrator are within the specified limits. (Reference CHAPTER 5: QUALITY ASSURANCE AND ACCEPTANCE TESTING; SECTION: ACCEPTANCE TESTING.) 2. Insert a sample of the radioisotope, with adequate activity to display 100µCi or higher, into the chamber of the 12 atmosphere calibrator. -
Page 41: Cleaning And Maintenance
It is recommended that periodic (every five years) re-calibration of the CRC -712MX be performed by Capintec’s Authorized Service Center to guarantee the instrument’s high reliability is maintained. Contact Capintec’s Authorized Service Center in Pittsburgh for servicing or re-calibration at 1-800-227-6832. -
Page 42: Preventative Maintenance
Other than the Readout Unit fuses (see LINE VOLTAGE SELECTION/FUSE REPLACEMENT in this chapter), there are no user serviceable parts contained in the system. Every five years, the system should be returned to Capintec’s Authorized Service Center for a complete verification. CAPINTEC, Inc. -
Page 43: Printer Fuse
® CAPINTEC, INC. -712MX ® The CRC -712MX can be set to operate from either a nominal 115 volt or a nominal 230 volt AC power line. To check or change the setting: (refer to Figure 7-1) ® 1. Turn off the CRC -712MX power switch and unplug the line cord from the power entry module. -
Page 44: Troubleshooting
® CAPINTEC, INC. -712MX TROUBLESHOOTING Some problems may be very easy to diagnose and correct in the field with little or no equipment. If a problem should occur, check here before you call for service. You may be able to save a considerable amount of time and money. -
Page 45: Accessories And Replacement Parts
Hot Cell Chamber Mounting Flange When the Capintec Ionization Chamber is used in a Laboratory Hot Cell, it is frequently advantageous to mount the chamber under an opening in the floor of the Hot Cell. For this application, Capintec provides a special mounting flange for the Ionization Chamber that matches the mounting hole provided in a Laboratory Hot Cell. -
Page 46: Data Logging Printer
® CAPINTEC, INC. -712MX Data Logging Printer The data logging printer option uses the RS-232C communication protocol with a serial printer and the print push-button as a simple measurement logging system. When the print button is pushed the current information displayed on the calibrator is printed. This option consists of a serial printer, cables, and an interface PC board. -
Page 47: Shipping
® If for any reason the CRC -712MX must be returned to Capintec, the shipping carton must contain the following or equivalent labeling as shown in Figure 7-2 and Figure 7-3. Label stipulating the maximum environmental conditions for safe storage and shipment. -
Page 49: Appendix I - Principle Of The Calibrator
® CAPINTEC, INC. -712MX APPENDIX I PRINCIPLE OF THE CALIBRATOR GENERAL The definition of activity, the basic principle of the calibrator, and the detailed discussion on the calibration are presented in this section. DEFINITION OF ACTIVITY ACTIVITY Activity is defined as:... - Page 50 ® CAPINTEC, INC. -712MX β Decay The nucleus emits an electron (β particle), and a neutrino. β decay The nucleus emits a positron (β particle) and a neutrino. Nuclear Transition A photon (electromagnetic radiation, γ-decay), electron (Internal Conversion Electron Emission, CE or electron-positron pair (Internal-pair emission, e±) is emitted by a nucleus in a transition from a higher to lower energy state.
- Page 51 ® CAPINTEC, INC. -712MX The range of most emitted β's is very short. It should be noted that in β and β emission, the emitted electron or positron has a continuous energy spectrum, which ranges from E is the maximum transition energy. β-rays (with the exception of a small zero, where E portion of very high energy βs) will be stopped in the sample, in the chamber liner, and in the...
- Page 52 ® CAPINTEC, INC. -712MX (radionuclides) are the most common means of γ-ray production. Radioisotope γ-sources emit photons of one or more discrete energies. X-Rays X-rays are associated with the deceleration of electrons or with orbital electron transitions in atoms. The radiation from a γ-source is often accompanied by characteristic x-rays from transitions of the orbital electrons in the daughter atom.
- Page 53 ® CAPINTEC, INC. -712MX Compton Effect The Compton Effect is a collision between a photon and an electron that can be considered unbound. An electron can be considered to be unbound (or “free”) if the energy of the incident photon is much greater than the binding energy of the electron.
- Page 54 ® CAPINTEC, INC. -712MX The collection voltage across the chamber sets up an electric field. The positive ions will drift towards the negative electrode and the electron (and negative ions if they are formed) will drift towards the positive electrode, thus producing a current. The electronic circuitry then measures either the current or the total charge produced during the period of interest.
- Page 55 ® CAPINTEC, INC. -712MX The sensitivity curve of the high range 1 atmosphere Ionization Chamber is under development. As Calibration Numbers are determined, users will be updated. Detailed Discussions Effects of the Integral Shield The advantage of the shield is the reduction of radiation exposure to the personnel handling the radioisotopes, as well as reduction of the background effects on the activity measurements.
- Page 56 ® CAPINTEC, INC. -712MX Effects of Impurities An Ionization chamber itself does not have intrinsic energy- discrimination capability. The presence of radioisotope impurities will affect the reading of the instrument unless the effect of impurities is eliminated by photon filtration as is done with Mo99 breakthrough in Tc99m.
- Page 57 NUMBERS CALIBRATION SETTING NUMBERS The Calibration Setting Numbers in Table II are applicable to the Capintec Radioisotope Calibrator only for measurement of isotopes in NIST standard source ampoule geometry. Special configurations for Brachytherapy source measurements are listed in Table III.
- Page 58 ® CAPINTEC, INC. -712MX In general, the attenuation of radiation by a plastic syringe is less than for the standard ampoule, while for most glass syringes, the attenuation will be greater than for the standard ampoule. The anticipated syringe corrections are listed on Table II under the column “Uncertainty Due to Syringe Correction”.
- Page 59 The calibration numbers given in this table were obtained by intercomparison with NBS reference source measurements in a standard range dose calibrator having a 12 atmosphere chamber and a high range dose calibrator having a 1 atmosphere chamber. See Manual for ® details. CRC is a registered trademark of Capintec Inc. 7120-1256 January 08 APPENDIX II...
- Page 60 ® CAPINTEC, INC. -712MX TABLE II LISTING OF CALIBRATION NUMBERS FOR MEASUREMENT OF SOURCES IN NIST STANDARD SOURCE AMPOULE GEOMETRY. CAUTION: The calibration numbers that are listed in this table with NIST reference were determined by direct measurement with NIST standard sources. The calibration numbers given in this table with...
- Page 61 ® CAPINTEC, INC. -712MX TABLE III ADDITIONAL CALIBRATION NUMBERS THAT HAVE BEEN MEASURED FOR THE FOLLOWING 5 BRACHYTHERAPHY SOURCE CONFIGURATIONS. ® One or more of the following sources were used to calibrate the CRC one atmosphere chamber by the K & S Associates Inc.
- Page 63 ® CAPINTEC, INC. -712MX APPENDIX III MULTIPLICATION FACTORS FOR NON- EQUILIBRIUM RADIOISOTOPES The activity in a non-equilibrium sample can be determined by using the following equation: Meter Reading with Cal. Number Pure " A" Activity " A" ⎡ ⎤ ⎛...
- Page 65 ® CAPINTEC, INC. -712MX INDEX Acceptance Testing, 4-4, 5-1 Geometry Test, 5-1 Annual Tests, 5-5 Daily Tests, 5-1 Geometry Test, 5-1 Installation, 4-1 Quarterly Tests, 5-3 Iometer, 2-5 Accessories, 7-5 Accuracy overall, 2-6 Labels Accuracy Test, 5-5 Caution, 1-1 Activity Range, 2-5...
- Page 66 ® CAPINTEC, INC. -712MX Accuracy, 5-5 Battery, 5-2 Re-calibration, 1-4 Contamination, 5-2, 5-4 Receiving Condition Examination, 4-1 Daily, 5-1, 5-3 Repeatability, 2-6 Geometry, 5-1 Requirements Linearity, 5-4 Environment, 2-3, 4-3 Troubleshooting, 7-4 Power, 2-3, 4-3 Unpacking, 4-1 Safety, 1-1 Tips, 1-4...
- Page 67 NEW PRODUCT WARRANTY Conditions and Limitations CAPINTEC warrants our products to be free from defects in material and workmanship for a period of 12 months after delivery to the original buyer (unless indicated otherwise). Our obligation under this warranty is limited to...
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