PCM-2 Manual.pdf - Voss Associates

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Network Cable Option (PCM2 OPT10) Network Cable Option Parts List This option provides a means of connecting one or more PCM-2 units to a host computer through a network and consists of a single cable assembly which provides a connection at a point external to the instrument's electronics enclosure. Reference PCM-2 Option 10; Network Cable Item Ref # Part Name Description Manufacturer and Part Number Eberline Part Number 010 Cable Assembly Host Port, PCM-2 Eberline Instruments YP11534517 High Heel Perforated Grid Base Plate Option (PCM2 OPT11 ) High Heel Base Plate Option Parts List The 1/4" dia. perforated grid base plate option serves as a simple substitute for the standard slotted base plate in support of users with high heeled shoes. This perforated grid configuration reduces the open area over the foot detector to 58 %. Reference PCM-2 Option 11; Perforated (High Heel) Base Plate Item Ref # Part Name Description Manufacturer and Part Number Eberline Part Number II 010 I Footplate Perforated I Grid I Eberline Instruments I YP11534175 I PCM2.MAN/ REV Ai April 1995 17-73
Gas Management Option (PCM2 OPT12) Theory of Operation In concept, gas proportional detectors are very simple. In the real world, however, seals leak and materials come with random flaws. In practice, detectors require a constant flow of counting gas primarily to overcome the following: 1. Loss of counting gas through pinholes in mylar detector faces and through imperfect seals elsewhere. 2. Contamination with air (oxygen, water vapor, etc.) via the same routes. 3. Organic vapors released from plastics, gaskets, foam seals, adhesives and other construction materials, particularly in newly (re)built detectors. 4. Gradual degradation of the counting gas itself, especially when exposed to high radiation fields. The ideal solution is to provide each detector with a continuous flow of fresh counting gas to sweep out air and other contaminants as fast as they appear. In large multiple-detector instruments, this may not be economically or logistically feasible. Compromises may be made, such as plumbing several detector chambers in series, however the performance of each detector in such a chain becomes lower as gas purity decreases. A corollary of this is that instruments should ideally be plumbed in a parallel manner, so that no detector receives the used gas from another. Unfortunately if each detector is operated at a normal flow rate of 200 cclmin, gas consumption in a large system is relatively high. In addition, each detector must be provided with its own flow meter and adjustment valve to insure that counting gas is evenly distributed among all of the detectors. Finally, if the outlet of a detector is left open, chamber pressure will be very low and air will diffuse in relatively quickly. Flow rates must be adequate to maintain adequate working pressure and to prevent air from diffusing upstream from the gas omleI. The PCM-2 Gas Manager System incorporates the following features to reduce the gas consumption rate of gas flow proportional detectors: 1. Detectors are plumbed in parallel so that each receives fresh counting gas directly from the source. 2. A flow restrictor is inserted in front of each detector to insure even distribution of gas to every chamber. 17-7 4 rCM2.MMJI liuv AIArJ!l I ! ~~!:J
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Table of Contents Response Check .
Page 3 and 4:
Modular Detector Board Parts List1
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List of Illustrations PCM-2 8 PCM-2
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Detectors Installation Assembly, 11
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The image is one of a user's body o
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Counting Computers High Voltage Sup
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Theory of Operation Operational Mod
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Section 2 Installation Unpacking Th
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Electrical Power ~nsta~ Each of the
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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
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Restoring Default Values To force a
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Computer Interface The user is inst
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Main System Menu Upon entering test
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Section 4 View Measurement Results
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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
Page 145 and 146: Printer Option (PCM2 OPT3) Printer
Page 147 and 148: Remote Annunciator Option (PCM2 OPT
Page 149 and 150: RED YELLOW OS1 I~ ~~~ ~I 10 9 5 7LJ
Page 151 and 152: Wall Mount Remote Annunciator Optio
Page 153 and 154: Wall !J,OUr1t Base0\ (Accepts up to
Page 155 and 156: NOTE: The gate locks used on the PC
Page 157 and 158: ~3DNV~ 3iV/l [~~ ~ ~ I 1 2,3 4 XVrI
Page 159 and 160: Optional Features Parts List The fo
Page 161 and 162: Reference 11534-D478, Access Contro
Page 163 and 164: Reference 11534-D480, Access Contro
Page 165 and 166: 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
Page 171 and 172: 020 (Right) CfJ ;:§. (]) ' '" tJ
Page 173 and 174: lei Insert Card Reader Option Parts
Page 175 and 176: ICI Swipe Card Reader Option (PCM2
Page 177 and 178: XICO Insert Card Reader Option (PCM
Page 179 and 180: Side Door Ass'y, per 11534-0330, re
Page 181 and 182: CI Swipe Card Reader Option (PCM2 O
Page 183 and 184: HP Smart Wand Bar Code Reader Optio
Page 185 and 186: Intermec Bar Code Reader Option (PC
Page 187 and 188: to item 042 interlace Box Power J2
Page 189 and 190: Mylar/Poly Film Dispenser Option (P
Page 191 and 192: ------ ---------- 3, 19" lengths no
Page 193 and 194: Gas Bottle Enclosure Option (PCM2 O
Page 195: 4 req'd §r' J--~ o ' n m t : Det
Page 199 and 200: Gas use is expressed as the percent
Page 201 and 202: Reference Designation AlO Pmi Name
Page 203 and 204: ~ Ql (I) ~ ::J Ql crq ~ '"tI @ a Ql
Page 205 and 206: Gas Management Option Parts List Re
Page 207 and 208: €D)rel. €D) reI. 8 reI. Purge I
Page 209 and 210: from to PC-AT Disk I/o pwr suppy, C
Page 211 and 212: Reference 11534-D542; Spare Purging
Page 213 and 214: High Sensitivity Detector Screens O
Page 215 and 216: Head & Shoulders Position Sensor Op
Page 217 and 218: Photocell Emitter and Receiver to c
Page 219 and 220: 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
Page 225 and 226: Item Ref # PCM-2 Miscellaneous Part
Page 227 and 228: PCM-2 Miscellaneous Parts List Refe
Page 241 and 242: Section 19 Recommended Spare Parts
Page 243 and 244: PCM-2 Recommended Spare Parts List
Page 245 and 246: PCM-2 Recommended Spare Parts List
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PCM-2 Recommended Spare Parts List
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o :> l:\:I W / / ,--- Base Assemb
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CejJjng J1ssembly 11534-D315, sheet
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(( '\ 29 C/ttIj tl) 8-- §-- ~
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'~'" .~~ 1j . I ~ '-... '< ~ Q) t:
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:0 front panel board. Pl0 II I I ~
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IL~~~-----)}-------54". rer.------1
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1i O 1: C " 0 e ~i h n '-., n -0
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10 foot exhcust length (584 Gas Man
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"-"-"-"-"-"-"-"-"-"-"-"-"-"-"-"-"-"
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(lSsy ~- see Detail 6 i 336 001--'_
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§ Speaker cable § '" ~ ~ (]) C) N
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.... ~ /'--/ Gal rd stationary sect
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Ceiling Assembly per 11534-D315 _ G
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110 Lower Electronics E.nclosure As
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~ ;g if
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Statistical Control Of Radiological
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Eq. 8 EXAMPLE 2: An alpha CAM equip
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DISTRIBUTION FUNCTIONS Binomial Dis
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x pix) Pix) 0 0.082085 '000000 1 02
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P(x) Eq.31 As illustrated by Figure
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Chi-Squared Distribution Function T
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can only assume a single value, det
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In Figure 6 the shaded area corresp
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Controlling Sensitivity Qualitative
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1. Minimum Count time Since adjusti
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The term (Js is derived using the m
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'-----r~J aUAN, [~.-. DESC;~TI~N ':
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CAUTION: DO NOT use compressed shop
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NOTE: String the wire such that the
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detector clips have been reused mor
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DESCRIPTION t: Eberline ;"Jr1laFe N
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Long probes Medium probes Small
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- A 1/8" ID gas "supply" hose with
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