Rapiscan TSA TPM-903B Operation manual
TRANSPORTABLE PORTAL MONITOR
MODEL TSA TPM-903B
Operations & Service Manual
Doc: # 5058 Rev. A
March 2013
LAURUS Systems, Inc. - Ph: 410-465-5558 - Fax: 410-465-5257 - www.LaurusSystems.com
TSA TPM903 Operations and Service Manual Doc: # 5058 Rev. A
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This document is the exclusive property of Rapiscan Systems.
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STANDARD WARRANTY FOR RAPISCAN SYSTEMS INSTRUMENTS
Rapiscan Systems warrants this instrument to be free from defects in workmanship and materials
for a period of twelve months from the date of shipment, provided that the equipment has been
used in a proper manner and not subjected to abuse. At Rapiscan’s option, repairs or
replacements will be made on in-warranty instruments without charge at the Rapiscan factory.
Warranty of sub-systems made by other manufacturers will be extended to Rapiscan customers
only to the extent of the manufacturer’s liability to Rapiscan. Rapiscan reserves the right to
modify the design of its product without incurring responsibility for modification of previously
manufactured units. Since installation conditions are beyond the company’s control, Rapiscan
does not assume any risks or liabilities associated with methods of installation or with
installation results.
Every effort is made to keep the manuals up to date and accurate. However, because Rapiscan
Systems is constantly improving and upgrading the product line, Rapiscan can make no
guarantee as to the content of current manuals. No obligations are assumed for notice of change
or future manufacture of these instruments.
Manufactured by
Rapiscan Systems
14000 Mead St.
Longmont, Colorado 80504 USA
Phone: +1.970.535.9949
Fax: +1.970.535.3285
TSA TPM903 Operations and Service Manual Doc: # 5058 Rev. A
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List of Affected Pages
The pages and drawings listed below have been changed. The manual has been updated to
standardize this documentation.
Title: TSA TPM903 Operations and Service Manual
Date: March 2013
Pages: All
TSA TPM903 Operations and Service Manual Doc: # 5058 Rev. A
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Table of Contents
1.0INTRODUCTION........................................................................................................1
1.1. SCOPE AND PURPOSE OF MANUAL .......................................................................1
1.2. GENERAL DESCRIPTION...........................................................................................1
1.3. SPECIFICATIONS.........................................................................................................2
2.0INSPECTION AND SET-UP ......................................................................................3
2.1. INSPECTION .................................................................................................................3
2.1.1. DAMAGE CLAIMS ....................................................................................................3
2.1.2. STORAGE.................................................................................................................... 3
2.1.3. SHIPPING.................................................................................................................... 3
2.2. SITE SELECTION AND PREPARATION ...................................................................3
2.3. ASSEMBLING THE SYSTEM TO SCAN PEDESTRIANS........................................5
2.4. ASSEMBLING THE SYSTEM TO SCAN VEHICLES (OPTIONAL)........................7
3.0SET-UP AND PROGRAMMING ...............................................................................8
3.1. START-UP AND SELF TEST.......................................................................................8
3.2. SET-UP...........................................................................................................................8
3.3. PASSWORD CONTROL...............................................................................................9
3.4. PROGRAMMING THE SYSTEM.................................................................................9
3.4.1. PARAMETERS.......................................................................................................... 11
3.4.2. FUNCTIONS.............................................................................................................. 15
3.5. PC COMMUNICATION..............................................................................................22
3.6. INSTALLING THE SOFTWARE................................................................................22
3.7. TAB...............................................................................................................................22
3.8. PARAMETERS ............................................................................................................22
3.9. SHOW COUNT ............................................................................................................23
3.10. HISTORY ...................................................................................................................24
3.11. INITIAL INSTALLATION CHECKLIST.................................................................26
4.0THEORY OF OPERATION......................................................................................28
4.1. OVERVIEW .................................................................................................................28
4.2. MODES.........................................................................................................................30
4.2.1. SELF-TEST MODE................................................................................................... 30
4.2.2. BACKGROUND MODE........................................................................................... 30
4.2.3. FAST COUNT MODE............................................................................................... 31
4.2.4. VARIANCE ANALYZER MODE............................................................................ 31
4.3. COMPONENTS............................................................................................................32
5.0MAINTENANCE.......................................................................................................33
5.1. TPM Controller.............................................................................................................33
5.2. VARIANCE ANALYZER MODE...............................................................................33
5.3. WALK THROUGH TEST............................................................................................33
5.4. PERFORMANCE VERIFICATION CHECKLIST .....................................................35
5.5. RECOMMENDED SPARE PARTS.............................Error! Bookmark not defined.
6.0TROUBLESHOOTING.............................................................................................37
6.1. COMPONENT ACCESS..............................................................................................37
6.2. COMPONENT TROUBLESHOOTING......................................................................39
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6.2.1.TPM CONTROLLER ................................................................................................. 39
6.2.2.DETECTOR ASSEMBLIES....................................................................................... 39
6.2.3. INFRARED DETECTOR.......................................................................................... 39
7.0GLOSSARY...............................................................................................................40
8.0PARTS LISTS............................................................................................................42
1.1SPARE PARTS ORDERING INFORMATION........................................................42
9.0LIST OF DRAWINGS...............................................................................................43
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CONFIGURATION TRACKING SHEET
RAPISCAN MODEL NUMBER:______________ SERIAL NUMBER:________________
SOFTWARE VERSION:______________ DATE RECEIVED:________________
OPTIONS AND ACCESSORIES:_________________________________________
SYSTEM MODIFICATIONS
MODIFICATION: _______________________________________________________
_______________________________________________________________________
INSTALLED BY:________________________________ DATE: ________________
MODIFICATION: _______________________________________________________
_______________________________________________________________________
INSTALLED BY:________________________________ DATE: ________________
MODIFICATION: _______________________________________________________
_______________________________________________________________________
INSTALLED BY:________________________________ DATE: ________________
MODIFICATION: _______________________________________________________
_______________________________________________________________________
INSTALLED BY:________________________________ DATE: ________________
MODIFICATION: _______________________________________________________
_______________________________________________________________________
INSTALLED BY:________________________________ DATE: ________________
TSA TPM903 Operations and Service Manual Doc: # 5058 Rev. A
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1
1.0 INTRODUCTION
1.1. SCOPE AND PURPOSE OF MANUAL
This manual is designed to enable operating and service personnel to properly operate and care
for the TPM-903B. Since applications are necessarily site-specific, operation procedures are
given in general terms. Service and repair are covered to the board level. Anything more complex
than this requires that the instrument or assembly be returned to Rapiscan Systems.
1.2. GENERAL DESCRIPTION
The Personnel Portal Monitor, Model TPM-903B, is a highly reliable system for the detection of
radioactive isotopes. The TPM-903B can be used to monitor personnel or, with an optional
vehicle adapter kit, vehicles. It can be set up quickly with a minimum of training.
When the portal is not occupied, the system will automatically monitor background radiation and
periodically update a visual display on the controller. When a person enters the portal, the system
begins fast count monitoring and will alarm if the count exceeds a predetermined alarm level.
The system will also alarm if the background radiation level exceeds or falls below preset limits.
The system consists of two vertical pillars and an overhead cross-piece, which serves as an
interconnect. The pillars are made of PVC cell core pipe to provide adequate strength and light
weight. The system electronics are mounted on one of the vertical pillars, this pillar is considered
to be the "master pillar" The pillar spacing is fixed at 32" to provide adequate clearance for
wheelchairs. The TPM-903B may be powered by six "D" sized alkaline cells which provide at
least 24 hours of continuous operation; or from 100 - 240 Vac, 50 - 60 Hz power using the power
supply included with the system.
Each pillar contains a radiation detector assembly and detector module. The system controller
and occupancy detector are mounted on one of the vertical pillars.
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1.3. SPECIFICATIONS
Detectors:
One 3" x 72" x 1.5" (7.5 x 180 x 3.8cm) organic plastic scintillator in each pillar, for a total
detector volume of 648in3 (10.6 liters) per system
Sensitivity:
1µCi of 137Cs
Power:
Six "D" size alkaline cells provide >24 hours of continuous operation, or 100 - 240V, 50 - 60Hz
power at .7 amps.
Passage Time:
Normally 0.5 seconds on a walk-through basis
Serviceability:
Self-checking routines and easily performed tests simplify board level trouble shooting. The
modular design allows quick and easy repair and maintenance.
Weight:
Approximately 100 lb. (45kg) total
Dimensions:
Two, 4.5" diameter x 84" high pillars (11 x 213cm), with a 4.5" (11cm) diameter crossover which
provides 32" (81cm) pillar spacing
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2.0 INSPECTION AND SET-UP
The following procedures should allow on-site personnel to correctly set up the TPM-903B for
normal operation. Follow the procedures in the order given. A Checklist is included at the end of
Section 3. It is recommended that a copy of this be filled out after initial installation and
whenever the TPM-903B is put into service after prolonged storage.
2.1. INSPECTION
Immediately inspect the instrument for mechanical damage, scratches, dents or other defects. It
should be examined for evidence of concealed as well as external damage.
2.1.1. DAMAGE CLAIMS
If the instrument is damaged in transit or fails to meet specifications upon receipt, notify the
carrier and Rapiscan Systems immediately. Shipping cartons, packing materials, waybills and
other such documentation should be preserved for the carrier’s inspection. Rapiscan will assist in
providing replacement or repair of the instrument if necessary.
2.1.2. STORAGE
If the instrument is to be stored for any length of time, disconnect power to the instrument and
remove the batteries. Care should always be taken to avoid subjecting the instrument to severe
mechanical or environmental shock. The instrument should be stored in a dry, temperature
controlled location.
2.1.3. SHIPPING
Before returning the instrument for any reason, notify Rapiscan Systems of the difficulty
encountered, giving the model and serial numbers of the equipment. Rapiscan will furnish
specific shipping instructions.
2.2. SITE SELECTION AND PREPARATION
Select a smooth, level site with enough space to accommodate the system and provide access for
the personnel to be scanned.
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2.3. ASSEMBLING THE SYSTEM TO SCAN PEDESTRIANS
1. Unzip the storage bag or unlatch the hard case and remove the pieces. There will be two
vertical pillars, two foot plates, and a cross piece.
2. Attach the vertical pillars to the foot plates with the washers and wing-nuts.
3. Feed the two shorter RJ-45 cables through the crossover tube and out the small hole below the
elbow.
4. Verify that the power switch is in the "Off" position. If the system is to be operated on
batteries, install a fresh set of "D" cells at this time. Otherwise, make sure an ac power source is
available.
5. Stand the two vertical pillars upright, approximately 32" apart. Orient the pillars so that the
serial number labels are facing each other.
6. Connect the RJ-45 connectors to the mating connectors on the vertical pillars. The small hole
below the elbow of the crosspiece should face the pillar with the controller.
7. Align the vertical pillars with the cross piece and slide the cross piece down onto the vertical
pillars until it is firmly seated.
8. Connect the two RJ-45 cables to the connectors marked 1 and 2 on the controller.
9. If ac power is to be used, connect the power supply output to the corresponding connector on
the TPM Controller, and plug the power supply into an ac outlet.
10. The system may be powered up, checked out, and programmed.
11. Attach the IR to the controller backplate using the supplied wing-nuts. The IR may be
positioned to face straight across or 45 degrees down. This adjustment may be necessary to avoid
triggering on people or vehicles outside the detection portal. Even with the IR pointing 45
degrees down it may not detect a very short person or an animal such as a dog. If this situation is
encountered then the system controller may be manually put into constant occupancy by pressing
the star (*) key on the keypad. To disable constant occupancy and return the unit to normal
operation press the pound key (#) on the keypad.
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2.4. ASSEMBLING THE SYSTEM TO SCAN VEHICLES (OPTIONAL)
1. Unzip the storage bag or unlatch the hard case and remove the pieces. There will be two
vertical pillars, two foot plates, and a cross piece. If the vehicle scanning option was purchased,
there will be two larger foot plates, two caps for the vertical pillars and a cross over cable with
protective cover.
NOTE: The large foot plates will not fit in the storage bag, so they will be stored separately.
2. Attach the vertical pillars to the large foot plates with the washers and wing-nuts.
3. Stand the two vertical pillars upright, approximately 10 feet apart. Orient the pillars so that the
serial number labels are facing each other.
4. Connect the RJ-45 connector to mating connector at the top of the #1 pillar. Install one of the
slotted caps on this pillar. Connect the other end of the cable to the "1" input on the system
controller.
5. Connect the #2 cable to the detector and the "2" input on the system controller. Install the
second slotted cap over the top.
6. Verify that the power switch is in the "Off" position. If the system is to be operated on
batteries, install a fresh set of "D" cells at this time. Otherwise, make sure an ac power source is
available.
7. If ac power is to be used, connect the power supply output to the corresponding connector on
the TPM Controller, and plug the power supply into an ac outlet.
8. The system may be powered up, checked out, and programmed.
9. Attach the IR to the controller backplate using the supplied wing-nuts. The IR should be
positioned to face straight across the vehicle portal. The distance adjustment on the back of the
IR should be set to its maximum range.
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3.0 SET-UP AND PROGRAMMING
3.1. START-UP AND SELF TEST
Turn on the power switch located on the side of the TPM-903B controller. The unit will reset and
clear the system, then perform a Power On Self-Test (POST) which takes approximately ten
seconds. The tests are displayed on the screen as they are run, if any test fails, the system will be
halted. The problem must be corrected before operation can commence.
The alarm will be turned on for about four seconds. If all the tests have been completed
successfully the system will go into the BACKGROUND Mode. The initial background
acquisition takes twenty seconds.
When the background is complete, system status will be displayed. The status screen consists of
four lines:
GAMMA = nnnn (background or COUNT, in CPS)
READY (system status, READY, TAMPER, OCCUPIED)
# OCC: (number of occupancies)
mm/dd/yy hh:mm (date and time)
The system is now ready for programming and set-up.
3.2. SET-UP
The TPM-903B is fully calibrated at the factory. It is possible that these adjustments may be
affected during shipment, so the calibration should be verified using the Field Calibration
Procedures in Section 5.1.
The TPM-903B controller is a variation of the SC-770, a general purpose controller that is used
in several different systems. It has many user programmable parameters that can be used to
optimize it for a wide variety of applications. Refer to Section 3.4 for details on programming the
controller.
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3.3. PASSWORD CONTROL
The zero (0) key on the keypad is used to enter the set-up mode from the operating screen. Before
the menus can be accessed, the password must be input, followed by the pound (#) key. If the
password in not entered correctly, the system will return to the operating screen.
NOTE: The password is set to "1234" and cannot be changed.
3.4. PROGRAMMING THE SYSTEM
CAUTION
Always verify the calibration of the system before attempting to program the system.
All of the system parameters are controlled from the system controller which is mounted on the
"#1" pillar. In order to access the TPM-903B, the cover must be removed by removing the four
screws in the corners of the clear cover.
The TPM-903B has a twelve-key keypad on the front panel. Using this keypad, the operator can
perform system set-up and diagnostic tests.
After the system has been powered up, and acquired its initial background, the set-up menu can
be accessed. The parameters and diagnostic functions are protected by password access.
This section outlines the menus. A detailed description of the functions immediately follows.
Pressing the number associated with the desired operation permits the operator to access that
function. Pressing the zero key will display the next page of the current menu, where appropriate.
Pressing the pound (#) key will return to the main menu from the sub menus, or return to normal
operation if it is pressed at the main set-up menu.
When a parameter is with a "NEW =" prompt below it, a new value may be entered from the
keypad. Pressing the asterisk (*) key clears the current operator entry, pressing the pound (#) key
accepts the current value, or the new value that has been entered by the operator.
The set-up menu presents the operator with a choice of parameters or functions. Pressing the
"one" key will present a menu of the available PARAMETERS. Pressing the "two" key will
present a menu of the available FUNCTIONS.
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3.4.1. PARAMETERS
To access PARAMETERS you will first have to press “0” followed by the password. The next
screen gives you two options, 1. GAMMA and 2. COMM SET. Press 1 on the keypad. The next
screen that comes up will give you 1. PARAMETERS and 2. FUNCTIONS. Press 1 to give you
the following options:
1. HI/LO LEVELS: Background alarm levels
2. OCCUP HOLDIN: Number of 200ms intervals to hold in after occupancy
3. NSIGMA: N*sigma radiation alarm level
4. SET CLOCK: Time and date
5. BKG TIME: Number and position of detectors in the system
6. SHOW VERSION: Displays the firmware version
7. KEYPAD RESET: Changes from auto reset to manual reset
8. ADJ. DISCRIM Discriminator adjustment
3.4.1.1. HI/LO LEVELS: Sets the low and high background alarm levels, in CPS per detector. If
the counts fall outside this window, the system will indicate a background fault, and not allow
further operation until the problem is corrected. These levels should be set to alarm if the average
background deviates too far from normal. These alarms are intended to flag a failure in the
detector or electronics. The precise settings will vary with local conditions and requirements, but
a good starting point is usually 50% of the average background (per detector) for the low and
150% of the average background (per detector) for the high.
3.4.1.2. OCCUP HOLDIN
Number of 200ms intervals to hold in after the occupancy signal indicates the system is vacant.
This prevents the person from attenuating the background. The factory setting is 5 intervals
(1,000 milliseconds), but the optimum setting may vary with local conditions.
3.4.1.3. NSIGMA
Sets N*sigma radiation alarm level. Where N is the number entered and sigma = 1 background in
CPS. This formula determines the number of counts, above background, that will trigger a
radiation alarm.
3.4.1.4. SET CLOCK
Sets the system time and date. The operator will be prompted to enter the hours (in 24-hour
format), minutes, month, date, and year (last two digits only) from the keypad. When the pound
(#) key is pressed after the last entry, the data are written to the internal clock/calendar.
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3.4.1.5. BKG TIME
Sets the background counting time for the system. Press <1> to increment the time by 5 seconds,
<7> to decrement the time by 5 seconds. Press <#> to accept the setting. Range is 20 - 120
seconds.
* If you have an area with large background fluctuations, you can increase the BKG Time to help
average out those bkg spikes over a longer period of time (say ~1 minute).
3.4.1.6. SHOW VERSION
Displays the software version number, press any key to return to the setup menu.
3.4.1.7. KEYPAD RESET
When enabled, requires any alarm to be silenced by using the keypad.
3.4.1.8. ADJ. DISCRIM
Opens the menu to adjust the LLD and ULD. The discriminators set the energy levels at which
the system will be accept counts. If the isotopes are unknown, leaving the discriminators set at
the factory defaults of 0.068 and 5.040 volts is normally acceptable. When the system is shipped
from the factory, the discriminators are set to accept energy in the approximate range of 22 keV
to 1650 keV. The settings are necessarily site specific, and may require adjustment to meet local
requirements. The relationship of discriminator voltage to energy level, in keV, is approximately
1 volt of discriminator level equals 330 keV. Using this formula, the factory settings equal:
LLD 0.068 volts = 22.4 keV
ULD 5.040 volts = 1,650 keV
This relationship is an approximation. In practice, the actual values will vary slightly. Always
test the system with the isotope(s) of interest to ensure maximum sensitivity. Refer to the formula
for signal to background ratio in Appendix A for details on optimizing the discriminator settings
for specific isotopes.
NOTE: After changing the discriminator settings, always run a variance test to ensure that
system noise is not affecting the count data.
Two methods of adjustment are provided:
1. Direct entry: Press the zero key from the "ADJUST ULD/LLD" menu. The operator will be
prompted for a new LLD setting. Press the pound (#) key to accept the current setting. Three
digits must be entered to change the value: volts, tenths of a volt and hundredths of a volt; press
the pound (#) key to complete the operation.
NOTE: Since the Digital to Analog Converters (DACs) have limited resolution, manual entries
will be rounded to nearest value the DACs can output.
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2. Manual adjustment: At the "ADJUST ULD/LLD" menu, the discriminators may be adjusted
one step at a time while observing the count from both detectors.
The following keys are used:
1 increments the LLD by one step (approximately 0.0098 volts)
7 decrements the LLD by one step
3 increments the ULD by one step (approximately 0.0196 volts)
9 decrements the ULD by one step
When the settings are satisfactory, press the pound (#) key to accept the settings.
Pressing the asterisk (*) key will load the default discriminator settings: LLD = 0.098 and ULD =
5.040.
3.4.2. FUNCTIONS
1. SHOW COUNT: Displays detector counts
2. VARIANCE: Performs variance test on all detectors
3. CLEAR G-CNTS: Clears the counter of recorded gamma alarms
4. F-ALARM TEST: Displays the number of alarm comparisons vs. the number of alarms
5. SYSTEM ID: Assigns an identification number to the system
6. PROFILING: Turn ON or OFF an ASCII data string to the Ethernet and RS-232 outputs
7. CALIBRATION: Automatically adjusts each detector to achieve the proper CPS.
8. RESTORE CAL: Restores the factory calibration high voltage values.
3.4.2.1. SHOW COUNT
Displays detector counts, in CPS, updated once per second. All alarms are disabled in the show
count mode. Press the pound (#) key to exit the show count mode.
3.4.2.2. VARIANCE
Performs a variance test on all detectors. The system runs 15-second variance passes. In the
TPM-903B system, Rapiscan recommends running five 15-second passes. After five passes all
variance readings should be less than 0.10. Refer to Appendix A for further detail on the variance
test and the formulas used. Press the pound (#) key to terminate the variance test. Perform a
variance test and a walk-through test with a source (see Section 4) before the unit is put into
operation. For more information and recommended settings for different SNM types call
Rapiscan’s engineering staff.
3.4.2.3. CLEAR G CNTS:
The SC-770 counts the number of occupancies and alarms since it was turned on. These numbers
are displayed here. The counter may be cleared by pressing <1>, any other key exits this mode
without clearing the counters.
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3.4.2.4. F-ALARM TEST:
Displays the number of alarm comparisons that have been made and the number of alarms that
were detected. These values are cleared when the system is turned off. The primary use for this
feature is to test the number of nuisance alarms in a controlled environment.
3.4.2.5 SYSTEM ID:
Assigns an identification number to the system. This number is used to uniquely identify the
system to a PC. This number must be used by the PC to establish a communications link. This
range of this number is 1 - 32,767. This number is set to 1 when the system is shipped.
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3.4.2.6 PROFILING:
The controller can be set to continuously output an ASCII data string to the Ethernet and RS-232
outputs. The display will show "ON" or "OFF". Pressing any key other than the <#> key toggles
the setting. The <#> key accepts the current setting.
The strings look like this:
GB,XXXXXX,XXXXXX,XXXXXX,XXXXXX CRLF
Gamma background sent every 5 seconds. Counts are a 20 second rolling average normalized to
a one second count.
GH,XXXXXX,XXXXXX,XXXXXX,XXXXXX CRLF
Gamma high background fault sent every 5 seconds for the duration of the fault condition.
GL,XXXXXX,XXXXXX,XXXXXX,XXXXXX CRLF
Gamma low background fault sent every 5 seconds for the duration of the fault condition.
GS,XXXXXX,XXXXXX,XXXXXX,XXXXXX CRLF
TCP Ethernet output: Raw gamma count information sent every 200msec while the system is
occupied and not in an alarm condition.
RS-232 Output: Sent every second while the system is occupied and not in an alarm condition.
The counts are a one second count averaged from the 200msec rolling count buffer.
GA,XXXXXX,XXXXXX,XXXXXX,XXXXXX CRLF
TCP Ethernet output: Raw gamma count information sent every 200msec while the system is
occupied and in an alarm condition.
RS-232 Output: Sent every second while the system is occupied and in an alarm condition. The
counts are a one second count averaged from the 200msec rolling count buffer.
TT,000000, 000000, 000000, 000000 CRLF
Tamper or power fail condition detected. This is sent once when the following conditions occur;
ac power loss, charger output failure, or when the pillar doors are open. Fields are padded to 32
bytes.
TC, 111111,111111,111111,111111 CRLF
Tamper or power fail condition cleared. This is sent once when the following conditions occur;
ac power returned, or when the pillar doors are closed. Fields are padded to 32 bytes.
GX,XXXXXX,000000,000000,000000 CRLF
System occupancy count since midnight each day. xxxxxx = 1 – 99,9999 occupancies. This
message is sent with an incremented count every time the pillar clears the occupancy. This
variable is automatically cleared on a power cycle and at midnight each day. Fields are padded
for 32 bytes.
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NOTE: PC Communications will not work (connect) when profiling is turned on.
3.4.2.7 CALIBRATION:
Required items: A Cs137 source with a depreciated value from 1uCi to 10uCi
The first thing the TPM controller does is to ask for the depreciated Cs137 activity of the source
that will be used for the calibration. If the user does not know the depreciated value of the
calibration source but does know when the source was manufactured, then the user can go to the
Rapiscan Systems web site (tsasystems.com) and look under archives/software/ SourceDepr to
determine the depreciated value. When entering a value less than 10 remember to enter a zero as
the first digit.
After the depreciated value has been entered the next screen is an information only screen that
will list the target counts that the controller will be using to perform the calibration.
The next thing the TPM controller does is take "roll call" to identify/verify the addresses of the
DM-757's. If the addresses haven't changed since the last time the unit was calibrated, it will
continue with the calibration. If it senses a conflict, the TPM controller will instruct the pillars
(DM-757's) to pick random addresses and will attempt to resolve the pillars. If communications
fail after 3 attempts, the controller will tell the user which pillar failed and halt operation. If
pillars are resolved successfully, calibration will continue.
After testing/resolving the pillars, the unit will flash both LED's and emit a short <beep>, then
the user will be prompted:
PLACE SOURCE
ON PILLAR 1
PRESS ANY KEY
After user presses a key
CALIBRATING
PILLAR 1
COUNTS: X
HVDAC: X
COUNTS are one second count data from the pillar.
HVDAC is the DAC value being sent to the pillar to adjust the high voltage.
TSA TPM903 Operations and Service Manual Doc: # 5058 Rev. A
_____________________________________________________________________________________________________________________
_____________________________________________________________________________________________________________________
This document is the exclusive property of Rapiscan Systems.
Unauthorized use or distribution is strictly prohibited
14
If the HVDAC value reaches 1000 and target counts haven’t been achieved, the calibration will
fail because the HV is getting dangerously high (for the PMT). The unit will flash both LED’s,
emit a short <beep> and the user will be presented with a message:
PILLAR 1
FAILED CALIBRATION
PRESS ANY KEY
After pressing any key, the user will be returned to the menu. (No sense in continuing with the
calibration at this point).
If the calibration completes successfully, the user will be prompted to place the source on pillar 2
and repeat the process for that pillar.
At the end of a successful calibration, the unit will flash both LED’s, emit a short <beep> and the
user will be presented with a message:
CALIBRATION
COMPLETED
PRESS ANY KEY
After user presses key:
PILLAR 1
HVDAC: X
PRESS ANY KEY
After user presses key the same info will be presented for pillar 2
Pressing any key at this point returns to menu.
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