Capintec CAPTUS 2000 User manual

CAPTUS®2000
THYROID UPTAKE SYSTEM
OWNER’S MANUAL
Capintec, Inc.
Sales and Marketing
and Customer Support
6 Arrow Road
Ramsey, NJ 07446
Phone (800) ASK-4CRC
Fax [phone]
Capintec, Inc.
Service Center
540 Alpha Drive
Pittsburgh, PA 15238
Phone [phone]
Fax [phone]
Copyright©1993 Capintec, Inc.
CAPTUS®is a registered trademark of Capintec, Inc.
ALL RIGHTS RESERVED
Manual Stock No. 9250-0059-A
Rev. J – February 2001

CAPINTEC, INC CAPTUS®2000
TABLE OF CONTENTS
SAFETY
Symbol Definitions....................................................................................... 1-1
Warning and Caution Labels ....................................................................... 1-2
Cautions and Notes..................................................................................... 1-4
General Safety Tips..................................................................................... 1-5
FUNCTIONAL & TECHNICAL DESCRIPTION
General........................................................................................................ 2-1
Technical Description .................................................................................. 2-1
Detector ........................................................................................... 2-1
Multichannel Analyzer...................................................................... 2-2
Technical Specifications.............................................................................. 2-3
Thyroid Uptake Stand ...................................................................... 2-3
System Power Requirements .......................................................... 2-3
Environment requirements............................................................... 2-3
Operational .......................................................................... 2-3
Storage ................................................................................ 2-4
Isolation Transformer....................................................................... 2-4
Printer .............................................................................................. 2-4
Computer System (Minimum System Requirements)...................... 2-4
MCA Interface PC Board (Accuspec/NaI Plus®Board......... 2-5
Amplifier Switch PC Board................................................... 2-5
CAPTUS®2000 Software Package...................................... 2-5
TUS Probe Detector ........................................................................ 2-5
Well Detector – Optional.................................................................. 2-5
Regulatory Listings .......................................................................... 2-6
EMC ..................................................................................... 2-6
Electrical .............................................................................. 2-6
ETL Listed............................................................................ 2-6
Functional Description................................................................................. 2-6
Thyroid Uptake ................................................................................ 2-6
Wipe Test......................................................................................... 2-7
Lab Tests – Urine................................................................. 2-7
Lab Tests – Blood ................................................................ 2-8
Bioassay .......................................................................................... 2-9
February 01 TABLE OF CONTENTS TOC-1

CAPINTEC, INC CAPTUS®2000
GENERAL OPERATING INSTRUCTIONS
Windows Operating Conventions................................................................ 3-1
Common Controls and Technique .............................................................. 3-1
Windows Controls ....................................................................................... 3-1
Trackball Cursor .............................................................................. 3-1
Command Button............................................................................. 3-2
Frame .............................................................................................. 3-3
Radio Button........................................................................ 3-3
Check Box ........................................................................... 3-3
Text Entry Box................................................................................. 3-3
Scroll Bars ....................................................................................... 3-4
Spin Control..................................................................................... 3-5
List Controls .................................................................................... 3-5
Menu Bars ....................................................................................... 3-5
Keyboard Control ............................................................................ 3-5
Switching to Other Windows Applications ....................................... 3-6
SYSTEM SETUP
Installation ................................................................................................... 4-1
Environment Requirements......................................................................... 4-1
Operational...................................................................................... 4-1
Storage............................................................................................ 4-1
Power Requirements................................................................................... 4-1
Turn On Procedure ..................................................................................... 4-2
General Operational Setup ......................................................................... 4-3
System Parameters..................................................................................... 4-4
Normal Values............................................................................................. 4-7
Reference Standards .................................................................................. 4-8
Isotope Library ............................................................................................ 4-10
Entering Isotope Information ....................................................................... 4-10
Efficiency Measurements ............................................................................ 4-11
Archive Files................................................................................................ 4-17
QUALITY ASSURANCE
Warm Up ..................................................................................................... 5-1
Daily Tests and Calibration ......................................................................... 5-1
Energy Calibration........................................................................... 5-2
Constancy ....................................................................................... 5-5
Quarterly Tests............................................................................................ 5-7
Chi-squared Test............................................................................. 5-7
Detector Resolution......................................................................... 5-8
Interpreting Test Results ............................................................................. 5-8
Printing Test Results ................................................................................... 5-10
TOC-2 TABLE OF CONTENTS February 01

CAPINTEC, INC CAPTUS®2000
THYROID UPTAKE
General Information..................................................................................... 6-1
Defining a Measurement Protocol ............................................................... 6-2
Adding Protocols.............................................................................. 6-3
Protocol Name ................................................................................. 6-4
Counting Method ............................................................................. 6-5
Multiple Capsule Administration ...................................................... 6-6
Counting Repetitions, Dose Form, and Predose Measurements .... 6-6
Isotope ............................................................................................. 6-7
Viewing, Editing, Deleting and Restoring Patients ...................................... 6-8
Regions of Interest ...................................................................................... 6-9
Counting Time and Probe Distance............................................................. 6-11
Adding New Patients ................................................................................... 6-11
Editing Patient Information .......................................................................... 6-13
Administer Dose .......................................................................................... 6-14
Deleting Information .................................................................................... 6-15
Making Measurements ................................................................................ 6-16
Predose Measurements................................................................... 6-18
Capsule Count Measurement .......................................................... 6-20
Room Background Measurement .................................................... 6-22
Patient Background Count............................................................... 6-23
Patient Neck Count.......................................................................... 6-24
Results......................................................................................................... 6-25
Printing Results ........................................................................................... 6-25
WIPE TESTS
Adding Wipe Locations................................................................................ 7-2
Isotope Efficiency ........................................................................................ 7-3
Edit Information ........................................................................................... 7-4
Deleting Wipe Test Information ................................................................... 7-4
Making Measurements ................................................................................ 7-5
Background Measurement............................................................... 7-6
Wipe Measurement.......................................................................... 7-7
Results......................................................................................................... 7-7
Adding Text Comments ................................................................... 7-8
Counting the Next Wipe............................................................................... 7-9
Printing Results ........................................................................................... 7-10
Detailed Analysis Report ................................................................. 7-10
Summary History Report ................................................................. 7-10
Text Comments for the Summary Wipe History Report................... 7-12
Deleting Wipe Test History .............................................................. 7-14
February 01 TABLE OF CONTENTS TOC-3

CAPINTEC, INC CAPTUS®2000
LAB TESTS
Schilling Test............................................................................................... 8-2
Setup Counting Parameters ............................................................ 8-3
Adding Patients ............................................................................... 8-4
Editing Patient Information .............................................................. 8-6
Deleting Patient Information ............................................................ 8-6
Making Measurements .................................................................... 8-8
Test Results .................................................................................... 8-11
Printing Results ............................................................................... 8-12
Dicopac®Test.............................................................................................. 8-14
Adding Patients ............................................................................... 8-15
Editing Patient Information .............................................................. 8-16
Deleting Patient Information ............................................................ 8-17
Making Measurements .................................................................... 8-18
Test Results .................................................................................... 8-23
Printing Test Results ....................................................................... 8-23
Blood Volume Test...................................................................................... 8-26
Adding Patients ............................................................................... 8-26
Editing Patients ............................................................................... 8-29
Deleting Patient Information ............................................................ 8-29
Making Measurements .................................................................... 8-30
Test Results .................................................................................... 8-35
Printing Test Results ....................................................................... 8-36
RBC Survival Test....................................................................................... 8-38
Adding Patients ............................................................................... 8-39
Editing Patient Information .............................................................. 8-41
Deleting Patient Information ............................................................ 8-41
Making Measurements .................................................................... 8-43
Test Results .................................................................................... 8-47
Printing Test Results ....................................................................... 8-47
BIOASSAY
Bioassay Setup ........................................................................................... 9-2
Efficiency Measurements ............................................................................ 9-3
Printing Efficiency Results........................................................................... 9-6
Adding Staff................................................................................................. 9-8
Editing Staff Information.............................................................................. 9-9
Deleting Staff Information............................................................................ 9-9
Making Measurements................................................................................ 9-10
Results ........................................................................................................ 9-13
Printing Results ........................................................................................... 9-13
MCA
Setup Menu................................................................................................. 10-2
Setting Presets ................................................................................ 10-2
High Voltage/Amplifier Adjustment.................................................. 10-3
ADC/Zero Adjustments.................................................................... 10-4
Quick Calibration Restore ............................................................... 10-5
TOC-4 TABLE OF CONTENTS February 01

CAPINTEC, INC CAPTUS®2000
February 01 TABLE OF CONTENTS TOC-5
MCA (cont)
Acquisition and Count Data......................................................................... 10-6
Regions of Interest (ROI)............................................................................. 10-7
Save and Restore Count Data or MCA Settings ......................................... 10-8
Save MCA Settings.......................................................................... 10-8
Recall MCA Settings........................................................................ 10-9
Save Spectrum ................................................................................ 10-10
Recall Spectrum .............................................................................. 10-10
Manipulation of Acquired Spectrum............................................................. 10-11
Moving the Displayed Spectrum A and B ........................................ 10-11
Applying Spectral Filters .................................................................. 10-12
Quadratic Smooth ................................................................ 10-14
1st Derivative ........................................................................ 10-14
2nd Derivative ....................................................................... 10-14
Printing MCA Data....................................................................................... 10-15
Time Activity Analysis.................................................................................. 10-17
Setup Information ............................................................................ 10-17
Making Measurements .................................................................... 10-19
Displaying Results ........................................................................... 10-20
Save Time Activity Results .............................................................. 10-22
Recall Time Activity Results ............................................................ 10-22
Printing Results ........................................................................................... 10-23
CLEANING AND MAINTENANCE
Introduction.................................................................................................. 11-1
Cleaning Instructions................................................................................... 11-1
Floor Stand ...................................................................................... 11-1
Detectors ......................................................................................... 11-1
Pointer Assembly............................................................................. 11-1
Keyboard ......................................................................................... 11-2
Monitor Screen ................................................................................ 11-2
Computer And Monitor Cases ......................................................... 11-2
Printer .............................................................................................. 11-2
Printer Cartridges............................................................................. 11-2
Trackball .......................................................................................... 11-2
Preventive Maintenance .............................................................................. 11-3
Servicing...................................................................................................... 11-3
Disposal....................................................................................................... 11-3
Fuse Servicing............................................................................................. 11-4
Power Line Fuses ............................................................................ 11-4
Computer, Monitor and Printer Fuses.............................................. 11-5
Accessories And Replacement Parts .......................................................... 11-5
Shipping....................................................................................................... 11-5
WARRANTY
DECLARATION OF CONFORMITY

CAPINTEC, INC CAPTUS®2000
PREFACE
Thank you for purchasing the CAPINTEC line of Thyroid Uptake Measurement Systems.
Every effort has been made to insure that the information in this document is complete,
accurate, and up-to-date. CAPINTEC 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.
CAPTUS®2000 and CII are registered trademarks of CAPINTEC, Inc.
Microsoft®, Windows®, MS Windows®, and Windows®95 are U.S.registered trademarks of
the Microsoft Corporation.
Hewlett Packard®DeskJet is a registered trademark of the Hewlett Packard Company.
DICOPAC®is a registered trademark of Medi-Physics, Inc., an Amersham Company of
Arlington Heights, IL.
SYSTEM DESCRIPTION
Your new CAPTUS®2000 is available in several configurations. Please take a moment to
review your system to determine exactly the configuration you have received. The basic
thyroid uptake system consists of the following:
•Floor stand with TUS Collimator and isolation transformer
•NaI (sodium iodide) Detector with Detector Socket Base
Note: Two versions of detectors are available: Flat Face Probe or Drilled Probe.
•Computer System with MCA Board and amplifier/switch PC Board Installed
•Computer Monitor
•Printer (Various options are available here)
•Cable Set for Connecting detector, printer, etc.
•15 foot power cord with hospital grade plug
•Software and Documentation
•Windows 95 or later, Manuals and Distribution Disks
•CAPTUS®2000 Manual and Installation Disks or CDs
•Well Counter with drilled well detector (Optional purchase)
July 00 PREFACE P-1

CAPINTEC, INC CAPTUS®2000
P-2 PREFACE July 00
YEAR 2000 COMPLIANCE
The CAPTUS®2000 measurement systems contain information technology that accurately
processes date and time data between the years 1999 and 2000. These products, when
used in combination with products purchased from other manufacturers, whose products
properly exchange date and time information, will accurately process the date and time. All
future products are committed to meeting the same Year 2000 Compliance.
MEDICAL EQUIPMENT SAFETY CLASSIFICATION
•CLASS I EQUIPMENT energized from an external power source.
•TYPE B EQUIPMENT with no applied parts to the patient.
•Ordinary EQUIPMENT without protection against the ingress of water.
•Suitable for CONTINUOUS OPERATION.
•NOT suitable for use in an OXYGEN or a FLAMMABLE ENVIRONMENT.
ELECTROMAGNETIC INTERFERENCE POTENTIAL
This equipment complies fully with interference immunity requirements of the standard EN
60601-1-2 “Medical electrical equipment: Part 1: General safety requirements; 2.
Supplementary standard: Electromagnetic compatibility”.
This equipment generates radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to nearby devices.
However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference, the user is encouraged to try to correct the
interference by one of the following measures:
•Increase the separation between the equipment and the affected device.
•Plug the unit into an outlet on a circuit different from that which the affected device is
connected.
If this fails to correct the problem, please contact Capintec.
IMPORTANT SAFETY INFORMATION
The CAPTUS®2000 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.
•Follow the unpacking and assembly instructions document, and read this manual
carefully before using this equipment. Be sure to save all provided documents for
future reference.
•Understand all warning and caution labels as explained in the “SAFETY” chapter
before operating this equipment.

CAPINTEC, INC CAPTUS®2000
CHAPTER 1
SAFETY
These warnings and instructions for use form an integral part of the CAPTUS®2000 and
must therefore be kept available for consultation at all times. Precise compliance with the
warnings and instructions is an essential condition for normal use, correct application and
thus safety of patients and user.
SYMBOL DEFINITIONS
Dangerous Voltage Present
Protective Earth Ground
Attention: consult owner’s manual for further information
Fuse
AC Voltage
“ON” (power)
“OFF” (power)
July 00 SAFETY 1-1

CAPINTEC, INC CAPTUS®2000
WARNING AND CAUTION LABELS
Located in the center section on both sides of the spring-arm of the floor stand is a warning
label, (see Fig. 1-1), concerning the hazard of removing the collimator when the spring-arm is
in the wrong position. When the weight of the collimator is removed from the spring-arm, the
arm can forcefully spring upward and cause serious bodily injury to the operator. The spring-
arm must be fully extended in the upright position to prevent this hazardous condition.
Figure 1-1
Located in the front section on both sides of the spring-arm of the floor stand is a warning
label, (see Fig. 1-2), concerning the hazard of improperly installing the collimator onto the
spring-arm. If the collimator support pin is not fully inserted and latched into the receptacle
block of spring arm, the collimator may detach from the spring-arm and fall onto the patient.
In addition, the arm can, again, forcefully swing upward and cause serious bodily injury to the
operator. The collimator is safely installed on the spring-arm when the red warning ring is
NOT visible between the collimator and the receptacle block. Refer to the UNPACKING AND
ASSEMBLY INSTRUCTIONS for illustrations.
Figure 1-2
Located on the top right hand side of the computer case is a label, (see Figure 1-3),
containing three caution statements pertaining to electrical safety of the computer. The first
statement, DO NOT REMOVE COVERS, is necessary because of the high voltage present
(1000 volts) on the PC boards installed in the computer. A screwdriver is necessary to
remove the covers. The second statement, REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL, informs the user that no servicing in the computer system may be performed
by the user. The third statement, ALL POWER CABLES MUST BE CONNECTED
THROUGH THE ISOLATION TRANSFORMER, is necessary to eliminate any shock hazard
to the patient (and the user). The isolation transformer insures the leakage current of the
computer system is less the 50 µAmps as stipulated by the UL 544 safety standard.
1-2 SAFETY July 00

CAPINTEC, INC CAPTUS®2000
Figure 1-3
Located on the top of the Isolation Transformer is a label, (see Figure 1-4), providing the
system power requirements, the voltage and serial number of the system and the
replacement fuse values for both power line voltages.
Please refer to CHAPTER 11: CLEANING AND MAINTENANCE for instructions on how to
change the fuse on the CAPTUS®2000 Isolation Transformer.
A fire hazard may exist if the wrong size of fuse is installed.
Figure 1-4
July 00 SAFETY 1-3

CAPINTEC, INC CAPTUS®2000
Located on the left side of the Isolation Transformer is a label, (see Fig. 1-5), with two
caution statements pertaining to the main power cord of the Isolation Transformer. The
statement, READ INSTRUCTIONS CAREFULLY BEFORE CONNECTING TO OUTLET,
directs the user to the owners manual before connecting the power. The second statement
alerts the user to select an electrical power receptacle that is designated as HOSPITAL
ONLY or HOSPITAL GRADE, to insure reliable grounding is provided to the CAPTUS®
system for electrical safety requirements.
Figure 1-5
CAUTIONS AND NOTES
CAUTION
Only qualified/trained personnel should operate or service this unit.
CAUTION
High voltage is present inside the Detectors (up to 1000 Volts). Due to the presence of these
high voltages, opening the covers with the system plugged in may be hazardous. Refer all
servicing to qualified personnel.
CAUTION
No internal adjustments inside the Detector, Computer or Printer that may be performed by
the user within the conditions of the warranty, except for changing the Isolation Transformer
fuse. Due to the presence of high voltages, opening the cover of the Computer with the
system plugged in may be hazardous. Refer all servicing to qualified personnel.
CAUTION
Never use the Well Detector without the well liner in place. Liners are inexpensive and easy
to replace. A contaminated Detector is a very costly mistake. If unit becomes contaminated
remove liner and clean unit as stated in CHAPTER 11: CLEANING AND MAINTENANCE
before operating.
CAUTION
Care must be exercised when moving the system or when maintenance is performed. The
system must not be inclined more than a 15 degree angle or tip over may occur.
CAUTION
Verify that the Collimator is correctly installed as stated in the Unpacking and Assembly
Instructions. Failure to follow these instructions could result in injury or product malfunction.
1-4 SAFETY July 00

CAPINTEC, INC CAPTUS®2000
CAUTION
This equipment generates radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful Electromagnetic Interference (EMI) to
nearby devices. However, there is no guarantee that interference will not occur in a
particular installation.
CAUTION
If any printer other than the model supplied by Capintec is used, the safety of the unit may be
compromised or Electromagnetic Interference (EMI) may be introduced into other devices
located in the same general area as the CAPTUS®2000 may become susceptible to EMI.
CAUTION
The unit contains lead. The unit should be disposed of in accordance with local and national
regulations.
CAUTION
The unit contains a Lithium Battery. This should be disposed of in accordance with local and
national regulations.
CAUTION
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 (every five years) re-calibration of the unit be performed by
Capintec to guarantee that the instrument's high reliability is maintained).
GENERAL SAFETY TIPS
•Unplug the equipment before cleaning it. Use only a damp cloth; do not use liquids or
aerosol cleaners.
•To protect the equipment from overheating, make sure none of the openings (vents)
on the Computer, Monitor, or the Printer are blocked.
•Do not use the equipment near water, or spill liquids of any kind into the equipment.
•Be sure that your power source matches the rating listed on the Isolation
Transformer.
•The CAPTUS®2000 power cord has a grounded, 3-prong plug as a safety feature,
and it will only fit into a grounded outlet. Do not use an adapter to defeat the
grounding.
•The CAPTUS®2000 computer system is connected to the Isolation Transformer to
comply with electrical safety for Medical Electrical Equipment. Due to the risk of
electrical shock, do not install or use a Modem or a Network adapter with the
CAPTUS®2000 computer system.
July 00 SAFETY 1-5

CAPINTEC, INC CAPTUS®2000
1-6 SAFETY July 00
•To avoid damaging the power cord, do not place anything on it or place it where it will
be walked on. If the cord becomes damaged, replace it immediately.
•Aside from the routine maintenance described in this manual, do not try to service
this equipment yourself. There are no user serviceable parts contained in the system
other than the fuses in the Isolation Transformer. Do not make any adjustments other
than those outlined in this manual, as you may in-validate the calibration or cause
damage requiring extensive repair work. Refer servicing to qualified service
personnel.
•Do not subject the Detectors to rough handling, or rapid temperature changes, as the
NaI Scintillation Crystal can be damaged. Do not use the equipment directly in front
of a radiator, heat register, or air conditioning duct.

CAPINTEC, INC CAPTUS®2000
CHAPTER 2
FUNCTIONAL & TECHNICAL
DESCRIPTION
GENERAL
The CAPTUS®2000 Thyroid Uptake / Well Systems is intended to be used by trained
Nuclear Medicine Technologists for performing Thyroid Uptake, Thyroid Bioassay, Wipe
Test, Blood Volume (with Cr-51 or I-125) Test, Shillings (including DICOPAC®) Test and RBC
Survival Test.
The CAPTUS®2000 also performs Pulse Height Analysis, isotope identification, radioisotope
decay corrections, efficiency calculations, and maintains appropriate storage and retrieval
files for reference data, and patient demographic data.
TECHNICAL DESCRIPTION
The CAPTUS®2000 is based on a powerful personal computer, with a windows-based
operating system.
The basic Thyroid Uptake system consists of the following:
•Floor stand with TUS Collimator and isolation transformer
•NaI (sodium iodide) Detector with Detector Socket Base
Note: Two versions of detectors are available: Flat Face Probe or Drilled Probe
•Computer System with MCA Board and amplifier / switch PC Board Installed
•Computer Monitor
•Printer
•Cable Set for Connecting detector, printer, etc.
•15 foot power cord with hospital grade plug
Detector
Your CAPTUS®2000 system is equipped with one or two NaI (Tl) (thallium-activated sodium
iodide) crystal and photomultiplier tube detector assemblies, a 1024 channel MCA
(multichannel analyzer), along with associated electronics and electronic controls which
provide power and amplification of the pulses generated by the detectors, as well as software
modules which record, analyze, manipulate, and store the measured data.
Since NaI crystals are hygroscopic, the detector assembly is hermetically sealed with an
aluminum coating. If the seal is broken, then water will be absorbed by the crystal, causing
deterioration of its measurement capabilities, and eventually it will require replacement. For
July 00 FUNCTIONAL & TECHNICAL DESCRIPTION 2-1

CAPINTEC, INC CAPTUS®2000
this reason, always handle the detector with care. Avoid scratching the surface with metal
objects such as pens.
When a gamma or x-ray from a radioactive source reaches the NaI crystal, it collides with the
electrons in the crystal matrix and transfers energy, primarily through Compton interaction.
The excited electron releases this energy as visible light in direct proportion to its absorbed
energy. For this reason, NaI detectors are classified as scintillation detectors. The higher
the energy of the incident ray, the more Compton collisions and consequently the more
visible light emissions will be measured before all of the energy is absorbed. These
sequential emissions of light for each incident ray generated from the sequential Compton
collisions appear to the measuring system as a single light pulse. The intensity of the pulse
is directly proportional to the energy of the incident gamma or x-ray. The light is eventually
directed toward the photomultiplier tube, either by the direction in which it was emitted or by
reflection from the interior of the aluminum housing. The photomultiplier tube, which is
optically connected to the sodium iodide crystal, converts the visible light pulses into
electrical energy and amplifies the signal through a series of dynodes. The resultant
electrical signal is directly proportional to the intensity of the incident light pulse. Therefore,
the pulse height generated by the system is directly proportional to the energy of the incident
gamma or x-ray detected by the system.
Multichannel Analyzer
A multichannel analyzer records the number and height of the electrical pulses generated by
the system, divides the pulses into groups based upon pulse height, and provides a visible
picture or spectrum of the pulses as well as count information. The CAPTUS®2000 divides
the pulses into 1024 groups or channels. Since pulse height is directly related to the energy
of the incident photon, the spectrum displays the pulse heights as a graph of pulses or
counts on the vertical scale and energy on the horizontal scale. By matching the displayed
spectrum to the decay scheme of an isotope, positive identification of the radioactive source
can be achieved.
Electronics associated with the process include the high voltage power supply, amplifiers,
and gain adjustments. The high voltage power supply provides voltage to the photomultiplier
tube for the light to electrical impulse conversion and amplification process. The amplifiers
linearly amplify the electrical signal produced by the photomultiplier tube before the signal is
passed to the MCA. The pulse height remains proportional to the energy of the incident ray.
The gain controls the amount of amplification which is performed by the amplifiers, and is
adjustable by the user.
The spectral display also has adjustments which control the pulse height which include zero
adjust, lower level (LLD) and upper level (ULD) discriminators. The zero adjust controls the
channel used for 0 pulse height or 0 energy, The LLD sets the limit for the lowest pulse
height to be analyzed, and the ULD sets the limit for the highest pulse height analyzed.
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CAPINTEC, INC CAPTUS®2000
TECHNICAL SPECIFICATIONS
Pentium class computer system including the MS Windows®operating system with a
multichannel analyzer PC Board, two scintillation detectors, a dual input detector
preamplifier/switch PC Board, a trackball pointing device, a color printer, and exceptionally
easy to use CAPTUS®2000 application software.
Thyroid Uptake Stand
Rugged floor stand with heavy duty locking casters and an articulating arm for the positioning
of detector/collimator. Individual shelves provided for the CAPTUS®2000 computer / monitor
system / monitor and for the printer. Mounting for the isolation transformer and the optional
well detector is provided on the base of the floor stand.
Dimensions: Height 175.3 cm (69")
Width 71.1 cm (28")
Depth 78.7 cm (31")
Weight 181.8 kg (400 lb.)
(with optional well) 213.6 kg (470 lb.)
System Power Requirements
CAUTION
If the input voltage to the following items is not within the stated limits, the unit may not
function correctly or may be damaged.
Standard 115V* 105-127V 1.3 Amps 50/60Hz
Optional 100V* 90-110V 1.5 Amps 50/60Hz.
Optional 230V* 210-255V 0.8 Amps 50/60Hz.
Optional 200V* 180-220V 1.0 Amps 50/60Hz.
*(Transformer Voltage Taps are set at the factory.)
Environment Requirements
Operational
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 warrant maximum reliability and accuracy.
The instrument should be located where the barometric pressure is within a range of
27 – 31 inches of mercury (91 – 105 kilopascals).
July 00 FUNCTIONAL & TECHNICAL DESCRIPTION 2-3

CAPINTEC, INC CAPTUS®2000
Storage
The instrument should be stored where the temperature is stable and the range is
from +39°F to +115°F (+4°C to +43°C) and the maximum relative humidity is 90%
non-condensing to warrant maximum reliability.
The instrument should be stored where the barometric pressure is within a range of
15 – 33 inches of mercury (51 – 112 kilopascals).
CAUTION
If these environmental requirements are not followed, the instrument may display erroneous
readings.
Isolation Transformer
An isolation transformer is provided with the CAPTUS®2000 system to insure the leakage
current is less than 50 µA as specified in the UL544 Medical Equipment Safety Standard. A
detachable 4.6m (15 ft) power cord, with a hospital grade plug, is provided to connect the
isolation transformer to the power source. Dual power line fuses are provided at the power
entry module for quick replacement.
Dimensions: Height 15.2 cm (6")
Width 12.7 cm (5")
Depth 10.2 cm (4")
Printer
Hewlett Packard®DeskJet – thermal inkjet color printer, prints results of studies
including graphic displays
Dimensions: Height 20.8 cm (8.2”)
Width 44.4 cm (17.5”)
Depth 38.9 cm (15.3”)
Weight 6.6 kg (14.5 lbs)
Computer System (Minimum System Requirements)
IBM compatible, 486 SX/33 CPU
Desktop Case
3½”, 1.44MB Diskette Drive
170MB Hard Drive
8MB RAM
SVGA Graphics Card (800×600, 256 Colors)
SVGA 14” Color Monitor with Swivel Base
Enhanced Keyboard and Trackball
MS Windows®operating system Version 3.1
2-4 FUNCTIONAL & TECHNICAL DESCRIPTION July 00