TSA Systems BM-286A Manuale di servizio
WASTE MONITOR
MODEL BM-286A
OPERATING AND SERVICE MANUAL
Version 1.00z
December 20, 2004
BM-286A
TABLE OF CONTENTS
1. INTRODUCTION.....................................................................................................................1
1.1. SCOPE AND PURPOSE OF MANUAL....................................................................1
1.2. GENERAL DESCRIPTION.......................................................................................1
1.3. SPECIFICATIONS.....................................................................................................2
2. INSPECTION AND INSTALLATION...................................................................................5
2.1. INSPECTION..............................................................................................................5
2.2. INSTALLATION........................................................................................................6
3. OPERATING INSTRUCTIONS.............................................................................................7
3.1. GENERAL OVERVIEW............................................................................................7
3.2. POWER-UP AND SELF-TESTS ...............................................................................8
3.3. NORMAL OPERATION..........................................................................................11
3.4. PROGRAMMING THE SYSTEM...........................................................................13
3.5. DIAGNOSTICS AND UTILITIES...........................................................................22
3.6. REPORTS .................................................................................................................24
3.7. INITIAL INSTALLATION CHECKLIST...............................................................25
3.8. WASTE STREAM SET-UP WORKSHEET............................................................27
4. THEORY OF OPERATION..................................................................................................28
4.1. UNIT OPERATION..................................................................................................28
4.2. COMPONENTS........................................................................................................28
5. MAINTENANCE....................................................................................................................33
5.1. OPERATOR MAINTENANCE ...............................................................................33
5.2. CALIBRATION........................................................................................................33
5.3. DISCRIMINATOR ADJUSTMENT........................................................................36
5.4. WEIGHT CALIBRATION.......................................................................................37
5.5. CALIBRATION CHECK-LIST ...............................................................................38
6. TROUBLESHOOTING .........................................................................................................39
6.1. DIAGNOSTIC AIDS................................................................................................39
6.2. FAULT ISOLATION................................................................................................40
6.3. COMPUTERS...........................................................................................................41
6.4. SIGNAL INTERFACE ASSEMBLY AND DETECTORS.....................................41
APPENDIX..................................................................................................................................42
A. WARRANTY..........................................................................................................................42
B. GLOSSARY............................................................................................................................43
C. FORMULAS...........................................................................................................................45
C.1. ACTIVITY FROM COUNTS..................................................................................45
C.2. EFFICIENCY...........................................................................................................45
C.3. N*SIGMA ALARM LEVEL ...................................................................................45
C.4. RELIABLE DETECTABLE ACTIVITY (RDA) FORMULA................................46
C.5. SIGNAL TO BACKGROUND RATIO...................................................................46
C.6. VARIANCE..............................................................................................................47
D. CONFIGURATION TRACKING SHEET..........................................................................48
E. PARTS.....................................................................................................................................49
E.1. RECOMMENDED SPARE PARTS........................................................................49
E.2. SPARE PARTS ORDERING INFORMATION......................................................49
F. DRAWINGS............................................................................................................................50
1. INTRODUCTION page 1
Model BM-286A
1. 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 BM-286A. 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 TSA.
1.2. GENERAL DESCRIPTION
TSA’s Barrel Monitor, Model BM-286A, is a large barrel monitoring device, designed to screen
bulky items of up to 1,000 pounds for radioactive contamination. It uses six plastic scintillation
detectors, one on each side of the chamber. An optional sodium iodide scintillation detector can
be provided for spectral monitoring.
Operation of the instrument is controlled from a touch screen LCD monitor or optionally using
an external computer keyboard. All access is controlled by user-assigned password protection.
A printer can be connected for report printing or the printing of container data labels.
The instrument performs a self-test and acquires a new background count each time it is powered
up. It also monitors its own operation during normal use and indicates any failures. It runs
continuously, updating backgrounds whenever no weight is detected inside the chamber. A new
count is initiated every time a door open/door close sequence is detected.
The BM-286A displays the total activity, scaled to appropriate units (µCi, nCi, etc.) and specific
activity in pCi/gram. These units are also included in reports and data sample information that
are created by the unit. The unit operates on 120Vac, 60Hz power with circuit breaker
protection.
1. INTRODUCTION page 2
Model BM-286A
1.3. SPECIFICATIONS
Sensitivity: See graph on page 4 (section 1.3. Specifications).
Detectors: Two 12"w x 24"h x 1.5"d (30 x 47 x 3.75cm) plus
Four 12"w x 35"h x 1.5"d (30 x 90 x 3.75cm) plastic scintillation detectors
coupled to photo-multiplier tubes via light pipes.
Total detector volume is 3,384 in3(55 liters)
Optional Detector: One 3" x 3" NaI(Tl)
Display: Super VGA color flat panel monitor with touch screen
Power:
Input: 120V, 60 Hz, 3A
Requirements: 115/230 Vac, 47 – 63 Hz, 400 VA
Time:
Scan 1 to 50,000 seconds, user-programmable
Background : 20 to 10,000 seconds, user-programmable
Serviceability: May be repaired to the board/subassembly level in the field
Dimensions:
Overall: 75" h x 44" w x 44" d (191 x 100 x 110cm)
Internal Cavity: 12" h x 12" w x 12" d (30 x 30 x 30cm)
1. INTRODUCTION page 3
Model BM-286A
Weight:
Unit ≈12,000 lb (5,455kg) with 1.75" lead shielding
Sample Weight: 5 to 1,000 pounds (2.3 to 455kg)
Environmental:
Temperature: 32 to 100˚ F (0 to 40˚C) operating; 0 to 120˚ F storage
Humidity: 0 to 95% Relative Humidity (non-condensing)
Accessories: (included with system) VGA color monitor, 101 key keyboard
Components: (optional) Printer, NaI(Tl) detector
and 1,024 channel MCA for spectral isotopic identification
1. INTRODUCTION page 4
Model BM-286A
2. INSPECTION AND INSTALLATION page 5
Model BM-286A
2. INSPECTION AND INSTALLATION
The following procedures should allow on-site personnel to correctly install and set up the
BM-286A for normal operation. Follow the procedures in the order given. It is recommended
that a copy of the Initial Installation Checklist (section 3.7.) be filled out after initial installation
and whenever the BM-286A is put into service after prolonged storage.
Use the Configuration Tracking Sheet (Appendix D) for maintenance and tracking instrument
modifications.
If necessary, consult TSA Systems for assistance in case of unusual site conditions or special
requirements.
2.1. INSPECTION
2.1.1. Incoming 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.
2.1.2. Damage Claims:
If the instrument is damaged in transit or fails to meet specifications upon receipt, notify the
carrier and TSA Systems immediately. Shipping cartons, packing materials, waybills and other
such documentation should be preserved for the carrier’s inspection. TSA will assist in
providing replacement or repair of the instrument if necessary.
2.1.3. Storage:
Care should always be taken to avoid subjecting the instrument to severe mechanical or
environmental shock. The instrument should be stored in a dry location and in a temperature
range of 0 to 50˚ C, temperature constant location.
2. INSPECTION AND INSTALLATION page 6
Model BM-286A
2.1.4. Shipping:
Before returning the instrument for any reason, notify TSA Systems of the difficulty
encountered, giving the model and serial numbers of the equipment. TSA will furnish specific
shipping instructions.
2.2. INSTALLATION
The instrument is complete and ready to operate when it is shipped. The touch screen LCD
monitor, stored inside the chamber, must be connected to the NT computer by removing the top
and right side panels. Mount the monitor with the screws provided on the right side and connect
the cables marked 1, 2, and 3 (power, VGA, COM2) to the back of the Windows NT computer
chassis. The optional keyboard is stored next to the computer and can be connected for
data entry. The power cord located on the left side of the unit plugs into a standard 115 volt,
60 Hz ac receptacle. When the instrument is installed at its operating location, the set-up and
operating procedures should be performed as described in General Overview (section 3.1.).
3. OPERATING INSTRUCTIONS page 7
Model BM-286A
3. OPERATING INSTRUCTIONS
3.1. GENERAL OVERVIEW
When the BM-286A is initially installed at its operating location, the operating parameters must
be adjusted to meet the local conditions and testing requirements. Most of the adjustments are
accessed via the software set-up mode.
A touch screen keyboard will appear any time you are required to enter data into the instrument.
Use the provided stylus to help in accessing buttons and entering information.
An Initial Installation Set-Up Checklist (section 3.7.) and a Waste Stream Programming
Worksheet (section 3.8.) can be found at the end of this section. The Set-Up Checklist should be
duplicated and filled in for each test source that will be used with the system. A copy of the
completed form should be kept in a convenient location as a reference for identifying future
problems.
The Waste Stream Programming Worksheet contains entries for each of the operating parameters
in the individual waste streams. The instrument permits up to 20 pre-programmed waste streams,
and the form may be copied as required to assist in programming these waste streams.
The set-up mode is password protected, with two levels of user access provided. Both level 0
and level 1 operators have access to the normal operation of the BM-286A. Operators with level
0 (administrative) access may change operating parameters and change discriminator settings.
Determining the operating parameters is largely dependent on local requirements and conditions.
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