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Summary of Contents for Radcal Accu Series
- Page 1 The Accu-Series - Accu-Pro™ Accu-Dose ® Accu-kV Radiation Measurement Systems User Guide...
- Page 2 Radcal Corporation 426 West Duarte Road Monrovia, CA 91016-4591 USA USA (626) 357-7921 Fax USA (626) 357-8863 email Service@radcal.com www.radcal.com Radcal Part # MCD/9096 4091099 Rev:K4 Firmware V6.08 (Accu-Pro) Firmware V7.03/V7.23 (Accu-Dose) Firmware V5.22 (Accu-kV) Printed: Feb 2013...
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Page 3: Table Of Contents
..............4 INTRODUCTION . -
Page 4: Introduction
4m cable that carries only digital signals and operating voltages to eliminate cable noise. Dose is measured with ion chambers or solid-state detectors. Radcal Accu-kV sensors determine kV, filtration and half-value measurements (diagnostic sensor) using differential absorption and an array of solid state detectors. - Page 5 Accu-Pro™ Diagnostic Ion Chamber and kV Sensor Components A. Accu-Pro™ (9096) Control Unit B. 40x12-W Diagnostic Range kV Sensor C. 10X6-6 Ion Chamber Sensor D. Positioner E. 9660 Ion Chamber Digitizer F. 90C6-4 Sensor Cable...
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Page 6: Getting Started
Insert the rectangular connector on the sensor cable into the socket on the right side of the instrument with the Radcal logo facing you. It will click into place. To remove it, pinch the levers on the side of the connector and pull back. - Page 7 Connect the battery charger: Connect the charger to the control unit and plug it into an ac outlet. The charge indicator should turn on orange indicating the battery is being charged. The instrument can operate while the battery is being charged.
- Page 8 Turn on the Accu-Pro™: Press the green power button. A set of vertical rectangles marches across the display to assure it is operating, the calibration date is displayed, and self-test is performed. During self-test the control unit reads the type and calibration factors of each sensor, measures the ion chamber temperature and the ambient pressure.
- Page 9 Functional test Now that the Accu-Pro™ is operating, you can use the test button to become familiar with the operation of the unit. The UP and DN arrows move through the main menu. The top line of the display continues to show Change or SELECT while the second line shows the function to be performed.
- Page 10 Pressing select displays filtration: 0.300 mm Cu HVL A10.0mm AL 7.12 Pressing select again displays dose measurements: 1.993mR/pls A1.196R/min C The C indicates the radiation measurement comes from the dose sensor. KV Pulse test - Mammographic sensor 22-40 kV The factory default setting is for a Mo/Mo track filter combination. To change to another combination see MODE SELECT in Setup (page 19).
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Page 11: Making Ion Chamber Measurements
MAKING ION CHAMBER MEASUREMENTS Allow the system to reach equilibrium by selecting dose rate mode and waiting at least three minutes. Do not touch digitizer. One does not need to shut the system off when replacing chambers, however, do not disconnect the chamber when actual measurements are being made. Each time a new chamber is used, the system must re-stabilized Note: For changing environments, allow 10 minutes per 10 C for the sensor/electronics to equilibrate. -
Page 12: Reference
REFERENCE Display The 2-line 16-character LCD displays menu selections and measurement results. Characters positioned at the left side of the display have special meaning: > in Setup indicates a parameter choice. Press select to chose the item. For dose measurements: ? indicates dose-sensor signal was outside calibrated range . -
Page 13: Sounds
Fluoro Display Scrolling: The kV displays provide filtration information by scrolling the display using select. A second press of select in kV Pulse and Dental modes provides exposure information if a dose sensor or Accu-kV diode is connected and displayed. Sounds A brief(5ms) 4 kHz tone is produced whenever a key-press is recognized. -
Page 14: Sensors
Sensors The Accu-Pro™ control unit can connect to various sensors to provide dose and x-ray beam information. The three main classes of sensors are the Accu-kV sensors that determine x-ray beam characteristics, the ion chambers that measure radiation dose and the diode-based radiation sensors. Also available are mA sensors used to determine x-ray anode current. - Page 15 Ion Chambers Radcal ion chambers are recognized for reliable measurements They exhibit excellent energy response. Their omnidirectional response makes them suitable for leakage and scatter measurements as well an CT measurements. They are available in specialized configurations for particular systems. Ion chambers require care in handling, require a bias voltage which must stabilize after bias is applied, and are much larger than diode sensors.
- Page 16 Diode dose sensors Diode sensors are compact, rugged, insensitive to handling, “instant-on” and do not require temperature and pressure correction’ They are somewhat directional which reduces the effect of scatter. Their energy response is not as uniform as the 10X6 ion chambers. Their directional response makes them unsuitable for CT, scatter and leakage measurements.
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Page 17: Main-Menu Functions
Main–Menu Functions indicate default functions. Using Setup you can add or remove functions to customize the main Italics menu. A flow chart representation of the main menu is shown on the enclosed diagram. Setup Provides access to configuration settings. See Setup–Menu Functions on page 19. Dose Rate Measures and displays dose rate. - Page 18 kV Dental Operates like kV Pulse. Disregards low-intensity preheat pulses if this feature is enabled in Setup. Duration can display in pulses for 50- and 60-Hz half-wave machines. kV Fluoro Operates like kV Pulse. Measures kV for 1 second, computes and displays the result and then repeats. Displayed values change slightly to adapt to a continuous waveform.
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Page 19: Setup-Menu Functions
Setup–Menu Functions Pressing select at the main menu display Change or SELECT setup enters Setup. The following information and options are provided in this mode:: Serial No. and firmware Version This manual applies to version 6. Pressure and temperature Values used for ion-chamber compensation. Prefixed with Std if measured not selected. SELECT restores setup defaults. - Page 20 Dent(al) thr(eshold) SELECT Raised threshold for kV-Dental. Values are multipliers of the kV pulse threshold. 1, 10, 25, 50, 100, 250, 600, and 1500. Pulsed Rad Mod Index no. SELECT Set up presets 0 thru 5 for Pulsed/Cine mode. For each, select four parameters: Pulse Frequency 0.25 6.25...
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Page 21: Batteries
Batteries The Accu-Pro™ is powered by 2 C cells located behind a removable cover at the lower rear of the control unit. Rechargeable nickel-metal-hydride (NimH) C-cells (Energizer NH35-2500) batteries are supplied from the factory. Alkaline batteries (IEC LR14) may also be used. Operating time depends on the measurement mode and battery but is usually in excess of 8 hours. - Page 22 The Accu-Pro™ includes a USB interface for communication with a PC. USB driver software required to implement this communication is automatically installed with XLPRO 4. A virtual serial-port driver is available; contact Radcal for details Connect a USB cable from the PC to the Accu-Pro™. If the driver is installed the green LED adjacent to...
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Page 23: Performance
PERFORMANCE Environmental conditions Operating temperature: 15EC to 35EC (30EC for 40X9,10-M sensors) Pressure 60 to105 kPa Humidity: Up to 80% RH or 20 g/m Storage Temperature: -20EC to +50EC kV Sensors 40X W Sensors: Potential 40 kV - 160 kV Accuracy 1 kV or 1% of value Repeatability (COV of 10 150 ms exposures) - Page 24 40X M Sensors: Potential 22 kV - 40 kV Accuracy 0.5 kV for Mo/Mo ±1 kV for Hologic Selenia x-ray machines with W anode and Rh filter Repeatability (COV of 10 150 ms exposures) 0.2kV for Mo/Mo 0.1kV for Hologic Selenia x-ray machines with W anode and Rh filter Rotation (normal to source-detector line) about sensor long axis: 0.5 kV for 6º...
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Page 25: Diode Sensors
Typical zero-level dose fluctuations: 1.8 μR, rms, for a 1-s pulse; 0.8 μR, rms, for a 0.1-s pulse Ion chambers Radcal ion chambers are unsealed. The control unit provides automatic correction for temperature, pressure and chamber calibration using a memory chip and temperature sensor located in the chamber stem and pressure measured at the control unit. - Page 26 10X6-0.18 Exposure Rate 50 μR/s - 180 500 nGy/s - 1.58 Gy/s Dose 200 μR - 2.0 2 μGy - 17 kGy Auto Dose 72 mR/s 631 μGy/s Threshold Calibration 4% @ Rate 2%, 3 mR/s - 180 R/s Dependence Energy 5%, 45 keV - 1.33 Mev Dependence...
- Page 27 10X6-0.6 Exposure Rate 20 μR/s - 133 200 nGy/s - 1.17 Gy/s Dose 100 μR - 589 1 μGy - 5 kGy Auto Dose 22 mR/s 189 μGy/s Threshold Calibration 4% @ Rate 2%, 10 mR/s - 100 R/s Dependence Energy 5%, 40 keV - 1.33 Mev Dependence...
- Page 28 10X6-0.6CT Exposure Rate 20 μR/s - 133 R/s 200 nGy/s - 1.17 Gy/s Dose 100 μR - 589 kR 1 μGy - 5 kGy Auto Dose 22 mR/s 189 μGy/s Threshold Calibration 4% @ 150 kV,10.2 mm Al HVL Rate 2%, 10 mR/s - 100 R/s Dependence Energy...
- Page 29 10X6-6 Exposure Rate 2 μR/s - 17 20 nGy/s - 149 mGy/s Dose 10 μR - 59 kR 100 nGy - 516 Gy Cine (per frame) 0.1 μR - 1 R 1 nGy - 10 mGy Auto Dose 2 mR/s 19 μGy/s Threshold Calibration...
- Page 30 10X6-6M Exposure Rate 2 μR/s - 10 R/s 20 nGy/s - 88 mGy/s Dose 10 μR - 59 kR 100 nGy - 516 Gy Auto Dose 2 mR/s 19 μGy/s Threshold Calibration 4% @ 20 kV,0.26 mm Al HVL Rate 5%, 20 mR/min - 600 R/min Dependence Energy...
- Page 31 10X6-60 Exposure Rate 200 nR/s - 2 2 nGy/s - 19 mGy/s Dose 1 μR - 5.9 kR 10 nGy - 52 Gy Cine (per frame) 0.01 μR - 100 0.1 nGy - 1.0 Auto Dose 216 μR/s 2 μGy/s Threshold Calibration 4% @ 150 kV,10.2 mm Al HVL...
- Page 32 10X6-60E Exposure Rate 200 nR/s - 2 2 pGy/s - 19 mGy/s Dose 1 μR - 5.9 kR 10 nGy - 52 Gy Cine (per frame) 0.01 μR - 100 0.1 nGy - 1.0 Auto Dose 216 μR/s 2 μGy/s Threshold Calibration 4% @ 50 kV, 0.88 mm Al HVL...
- Page 33 10X6-3CT Exposure Rate 2 μR/s - 40 20 nGy/s - 350 mGy/s Dose 20 μR - 118 200 nGy - 1.0 k Gy Auto Dose 4 mR/s 38 μGy/s Threshold Calibration 4% @ 150 kV,10.2 mm Al HVL Rate 2%, 2 mR/s - 40 R/s Dependence Energy 5%, 3 - 20 mm Al HVL...
- Page 34 10X6-180 Exposure Rate 100 nR/s - 600 1 nGy/s - 4.9 mR/s mGy/s Dose 200 nR - 2 kR 2 nGy - 17 Gy Auto Dose 72 μR/s 1 μGy/s Threshold Calibration 4% @ 150 kV,10.2 mm Al HVL Rate 5%, 20 mR/hr - 2 kR/hr Dependence Energy...
- Page 35 10X6-1800 Exposure Rate 5 nR/s - 18 50 pGy/s -200 mR/s μGy/s Dose 20 nR - 196 200 pGy -1.7 Gy Auto Dose 7 μR/s 63 pGy/s Threshold Calibration 4% @ 150 kV,10.2 mm Al HVL Rate +0, -5% 0.1 mR/hr - 20R/hr Dependence -10 % @ 65 R/hr Energy...
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Page 36: Waveform Output
Waveform Output Sensitivity 20mV/kV 200mV/R/s 0.5mV/mA Full scale Output impedance 100 Ω Sample Rate 77 μs 0.5 db frequency 1.0 kHz 3 db frequency 2.3 kHz Waveform only available in kV modes Requires 40X11-W and DDX10 -W or 40X10-M and DDX10-M Requires mA sensor 90M9 or 90M10 Part number reference Part numbers... -
Page 37: Operator Messages
OPERATOR MESSAGES Messages are displayed and a beep sounds when the Accu-Pro™ is unable to perform a measurement. Pressing SELECT generally proceeds. Pressing UP or DN exits to the main menu. Self-test “Battery LOW” Replace or recharge battery “Analog volt fail” Precision voltages are out of tolerance. -
Page 38: Ion Chambers And Dose Diodes
The top line of the display shows “System error”, with the bottom line showing one of several messages. Exits to the main menu after displaying the message for two seconds. Contact Radcal if it persists. Ion chambers and dose diodes These messages arise when measuring dose and dose rate using ion chambers or the DDX6 dose diodes. - Page 39 Figure 24 - Control Unit Configuration...
- Page 40 Figure 25 - Connector Locations...
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Page 41: Accessories
Connect a USB cable between the PC and the Accu-Pro™ control unit. If the green LED illuminates (it is not very bright) the Radcal USB software is installed on the PC; otherwise you need to install XLPRO version 4 or later. -
Page 42: 90M9 Mas Sensor
90M9 mAs Sensor Battery-powered, isolated, Invasive mA sensor Synchronized to Accu-kV measurement Real-time waveform. Automatic zero and no range switching. 2000 mA or 9999 mAs full-scale Measures absolute value of mA. 0.2% mA accuracy 5 μAs or 0.2% mAs accuracy (1-s pulse) Input impedance: Fixed, resistive, 1 ohm plus fuse and wiring. -
Page 43: 90M10 Mas Sensor
90M10 mAs Sensor Battery-powered, isolated, clamp-on non, invasive mA sensor Aperature 23mm. Synchronized to Accu-kV measurement Real-time waveform. Automatic zero and no range switching. 2000 mA or 9999 mAs full-scale Measures absolute value of mA. Resolution greater of 3-4 digits or .015mA mA accuracy: ±4% of reading (Limited by 0.6mA RMS noise below 15mA). -
Page 44: 10A96 Ion Chamber Adapter
10A96 Ion chamber Adapter This adapter adapts the 10X5 ion chambers to the 9660 ion chamber digitizer. It contains a microprocessor that translates between the jumpers, resistors and potentiometer located within the probe stem of 10X5-series ion chambers into signals that mimic the EAROM that holds calibration and chamber-type information the Accu-Pro™... -
Page 45: Chamber Positioner
Chamber Positioner The chamber positioner locates an ion chamber at a fixed height from the x-ray table. Holes in the base of the chamber positioner locate the kV sensor relative to the ion chamber to control the effect of backscatter from the kV sensor on exposure measurements. Because mammography measurements using th 6M chamber are less affected by backscatter, the mammography kV sensor may be positioned closer to the chamber. -
Page 46: Accu-Pro™ System Carrying Cases
Accu-Pro™ System Carrying Cases... -
Page 47: Appendix - Mammography Kvp Measurements On Hologic Selenia
Radcal 40X9-Mo kV sensor on top of the Bucky table. The small compression paddle may be left in-beam. Align the Radcal kV sensor so that its long axis is 90 degrees to the tube anode -cathode axis so as to eliminate heel effect. Move the sensor about one inch in from the table edge. Center the sensor right to left. - Page 48 Radcal, with shipping costs prepaid by the customer. Costs to return-ship to customer by ground transportation will be paid by Radcal if the repairs are warranty-applicable. This warranty excludes batteries.
- Page 49 Declaration of Conformity According to ISO/IEC 17050 and EN 45014 The Radcal Corporation declares, under our sole responsibility, that the Accu-Pro™ Measurement System conforms to the following product specifications. EMC: EN 50081-2 / EN 555011 Class A EN 50082-1 / IEC801-2, 4 kVcd, 8 kVAD EN 50082-1 / IEC801-3, 3V/m Note: The Analog Output is intended for use by trained users.
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