PCM-2 Manual.pdf - Voss Associates

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In Figure 6 the shaded area corresponds to the Gaussian Cumulative Distribution operating on SF - mathematically equal to equation 31. The distribution represents the probability that the background count rate will be less than RA(MIN)' so the false alarm rate is determined by Eq. 36 where F(SF) is short-hand notation for the Gaussian Cumulative Distribution Function operating on SF. p = 1 - F(SF) Eq. 36 EXAMPLE: In light of earlier comments, the false alarm rate is controlled entirely by SF, and is independent of R B • (If Table 2 is invoked, the independent variable ... "x" is substituted for "SF." It is noted that if SF is equal to 3.09. the table indicates F(SF) is equal to 0.9989991 and p = 1 F(SF) = 0.0010009. Consistent with Eq. 33, in the case of N channels or N measurements, the overall false alarm probability is indicated by Eq. 37. P = 1 - F(SF)N Eq. 37 Because F(SF) is always less than 1, raising it to a power greater than 1 will reduce the value and increase the overall false alarm probability. This suggests that with an increasing number of channels, larger Sigma Factors are required to maintain an acceptable false alarm rate. Larger Sigma Factors decrease sensitivity as will be discussed later in this writing, so some compromise is always in order. Table 2 can be used in inverse fashion by entering its field with p and extracting SF. This is the more logical approach to using the table. Eq. 38 expresses this technique mathematically where pI is notation for "the inverse function of F." Eq. 38 The process of invoking Eq. 38 and entering Table 2 with the results is greatly simplified by using the Sigma Factor Nomograph illustrated by Figure 7. To use the nomograph, extend a straight line from the tick mark on the left-hand column that corresponds to the number of channels in use through the desired false alann probability in the middle column until it intersects the right-hand column. The required Sigma Factor will be indicated. In analogous fashion. any of the three variables can become the dependent variable. <strong>PCM</strong>2.MAN
NUMBER elF CHANNELS :1 JO1 i 20 1 PROBABILITY OF FALSE ALARf,l .01 SiGMA FACTOR c= JOO f .001 1 9 8 7 6 5 .0001 .00001 .000001 s.OO .0000001 Figure 7, Sigma Factor Nomograph <strong>PCM</strong>2.MAI\'
Page 1 and 2:
Table of Contents Response Check .
Page 3 and 4:
Modular Detector Board Parts List1
Page 5 and 6:
List of Illustrations PCM-2 8 PCM-2
Page 7 and 8:
Detectors Installation Assembly, 11
Page 9 and 10:
The image is one of a user's body o
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Counting Computers High Voltage Sup
Page 13 and 14:
Theory of Operation Operational Mod
Page 15 and 16:
Section 2 Installation Unpacking Th
Page 17 and 18:
Electrical Power ~nsta~ Each of the
Page 19 and 20:
The RDA confidence should be edited
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1400 to 1900 volts) using long coun
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To determine which detector(s) are
Page 25 and 26:
Restoring Default Values To force a
Page 27 and 28:
Computer Interface The user is inst
Page 29 and 30:
Main System Menu Upon entering test
Page 31 and 32:
Section 4 View Measurement Results
Page 33 and 34:
Section 5 Edit I View PCM-2 VERSION
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v./henever the above parameters are
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Where: R bkg = The new computed ave
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Alpha & Beta Sum Zone Alarm Alpha &
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R new = The most-recently measured
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Alpha & Beta Sum Zone Alarm Alpha &
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WF= Weight Factor R new = The most-
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Count Rate Units Activity Units Cou
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Hand Switch Req'd? Hip switch Req'd
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The alarm precedence scheme preclud
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The keyboard arrow keys may be used
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Background Plateau Source Plateau D
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arcing potential. Once a high volta
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27.0 BACKGROUND PLATEAU - DETECTOR
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False Alarm Test Calibration Report
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Voice Annunciator Test boards are d
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Manual Ins ert: PCM-2 Personnel Con
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OPTIONS Hand Probe Option (PCM2 OPT
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performed as often as twice daily,
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exercising care to avoid detatching
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• Detector channels whose correct
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High & Low Count Fail Verify that t
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Section 11 Front Panel Board Genera
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Al6 is buffered to and from RS-232
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Connector Pinout: 06 DSR (from exte
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09 Output bit 1 @ A003Dispiay 1 clo
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PCM-2 Front Panel Board, YP11526000
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Front Panel Board Schematic 11526-D
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; P2 5 1 P3s 1 P4 5 ~ I o R;_-;;;;;
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Special Functions The RS-485 transm
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8S I t\:l ~ NOTES: 1. RESISTANCE VA
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Section 13 Modular Detector Board G
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Setup and Calibration High voltage
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Modular Detector Board, YP11543000
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~. ,,:Jrq II TJ2 I A2 CR2 CR3 CR4!
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~ ~ Q.. >::: ...... ~ .., b "" :::
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position 1 2 3 - 8 SI-8 Switch Sett
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PJ +5V AAAAA 1 1 ] .. ~ 'It GND ~ P
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Section 15 Traffic Light Board Gene
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\/\/\/\/\ 2 J 4 5 J 1 I , I 1\ I I'
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Section 16 Detectors General Descri
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Detector Part No. Detector Descript
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Revised Detector \ssemblies Parts L
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Reference 11534-D562 PCM-2 Revised
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~ o ....: 0 ~ ,.; j l I ~' --------
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0 -, ~ "
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ef R---- Anod~ I\'ire Spnng ! I Imr
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tones, which emanate from the perfo
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vec "0 (\ ~ ..... I N Q "?;- ....
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Revised Clicker Board Parts List Th
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o n a o o ~Q -i-oL-CJ-~ a -1 SCJ ~
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j---------------------l I p I I I I
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Switches SW1-6 set the RS-485 board
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Voice Annunciator Board, YP11513000
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co N u ~ '" N U +~ co 0:: o~ ~ ~r
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Voice Annunciator Option Parts List
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Printer Option (PCM2 OPT3) Printer
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Remote Annunciator Option (PCM2 OPT
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RED YELLOW OS1 I~ ~~~ ~I 10 9 5 7LJ
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Wall Mount Remote Annunciator Optio
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Wall !J,OUr1t Base0\ (Accepts up to
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NOTE: The gate locks used on the PC
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~3DNV~ 3iV/l [~~ ~ ~ I 1 2,3 4 XVrI
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Optional Features Parts List The fo
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Reference 11534-D478, Access Contro
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Reference 11534-D480, Access Contro
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RED lights oriented100'--/ " I on t
Page 167 and 168:
Ceiling Assembly, per 11534-0478 I
Page 169 and 170:
Swiveling Casters Option (PCM2 OPT6
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020 (Right) CfJ ;:§. (]) ' '" tJ
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lei Insert Card Reader Option Parts
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ICI Swipe Card Reader Option (PCM2
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XICO Insert Card Reader Option (PCM
Page 179 and 180:
Side Door Ass'y, per 11534-0330, re
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CI Swipe Card Reader Option (PCM2 O
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HP Smart Wand Bar Code Reader Optio
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Intermec Bar Code Reader Option (PC
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to item 042 interlace Box Power J2
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Mylar/Poly Film Dispenser Option (P
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------ ---------- 3, 19" lengths no
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Gas Bottle Enclosure Option (PCM2 O
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4 req'd §r' J--~ o ' n m t : Det
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Gas Management Option (PCM2 OPT12)
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Gas use is expressed as the percent
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Reference Designation AlO Pmi Name
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~ Ql (I) ~ ::J Ql crq ~ '"tI @ a Ql
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Gas Management Option Parts List Re
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€D)rel. €D) reI. 8 reI. Purge I
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from to PC-AT Disk I/o pwr suppy, C
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Reference 11534-D542; Spare Purging
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High Sensitivity Detector Screens O
Page 215 and 216:
Head & Shoulders Position Sensor Op
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Photocell Emitter and Receiver to c
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RF Spread Spectrum Modem Option (PC
Page 221 and 222:
Central Computer RF Modem Option (P
Page 223 and 224:
PCMHOST Program (PCM2 OPT20) The PC
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Item Ref # PCM-2 Miscellaneous Part
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PCM-2 Miscellaneous Parts List Refe
Page 229 and 230:
Page 231 and 232:
Page 233 and 234:
Page 235 and 236:
Page 237 and 238:
Page 239 and 240:
Page 241 and 242:
Section 19 Recommended Spare Parts
Page 243 and 244: PCM-2 Recommended Spare Parts List
Page 249 and 250: o :> l:\:I W / / ,--- Base Assemb
Page 251 and 252: CejJjng J1ssembly 11534-D315, sheet
Page 253 and 254: (( '\ 29 C/ttIj tl) 8-- §-- ~
Page 255 and 256: '~'" .~~ 1j . I ~ '-... '< ~ Q) t:
Page 257 and 258: :0 front panel board. Pl0 II I I ~
Page 259 and 260: IL~~~-----)}-------54". rer.------1
Page 261 and 262: 1i O 1: C " 0 e ~i h n '-., n -0
Page 263 and 264: 10 foot exhcust length (584 Gas Man
Page 265 and 266: "-"-"-"-"-"-"-"-"-"-"-"-"-"-"-"-"-"
Page 267 and 268: (lSsy ~- see Detail 6 i 336 001--'_
Page 269 and 270: § Speaker cable § '" ~ ~ (]) C) N
Page 271 and 272: .... ~ /'--/ Gal rd stationary sect
Page 273 and 274: Ceiling Assembly per 11534-D315 _ G
Page 275 and 276: 110 Lower Electronics E.nclosure As
Page 277 and 278: ~ ;g if
Page 280 and 281: Statistical Control Of Radiological
Page 282 and 283: Eq. 8 EXAMPLE 2: An alpha CAM equip
Page 284 and 285: DISTRIBUTION FUNCTIONS Binomial Dis
Page 286 and 287: x pix) Pix) 0 0.082085 '000000 1 02
Page 288 and 289: P(x) Eq.31 As illustrated by Figure
Page 290 and 291: Chi-Squared Distribution Function T
Page 292 and 293: can only assume a single value, det
Page 296 and 297: Controlling Sensitivity Qualitative
Page 298 and 299: 1. Minimum Count time Since adjusti
Page 300 and 301: The term (Js is derived using the m
Page 303 and 304: '-----r~J aUAN, [~.-. DESC;~TI~N ':
Page 305 and 306: CAUTION: DO NOT use compressed shop
Page 307 and 308: NOTE: String the wire such that the
Page 309 and 310: detector clips have been reused mor
Page 311 and 312: DESCRIPTION t: Eberline ;"Jr1laFe N
Page 313 and 314: Long probes Medium probes Small
Page 315 and 316: - A 1/8" ID gas "supply" hose with
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