PCM-2 Manual.pdf - Voss Associates

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possible accuracy, or if the sources used are of relatively low activities, background information acquired with the background plateau routine may be subtracted from source plateaus. In order to do this, the background plateau must include the voltage range of the source plateau and have been run at the same voltage steps. Source plateau graphs show four curves representing alpha and beta rates and crossover rates from alpha to beta and beta to alpha. To select the optimum high voltage setting for a detector while viewing its source plateau first move the cursor line to that point where the Beta as Alpha counts begin to rise. Select a high voltage setting just below that point, move the cursor there and press F2 to save that high voltage. If you want to set all other detectors to the same high voltage use the Override edit display. As with background plateau data, source plateau data can also be displayed as actual or normalized data. The alpha and beta source plateaus are normalized for each source type; the two curves that result from the beta source are normalized to the maximum value in that data. The curves generated by the alpha source are normalized in an analogous fashion. Thus, all four curves are displayed in comparable scale -- a feature that is especially useful if the alpha and beta sources differ greatly in activity level. If the hand probe option is installed and the hand probe board is communicating properly, a source plateau may be obtained for the hand probe detector as well. Pressing F5 in the "Select Detectors" screen toggles the selection of the hand probe detector. If the hand probe option is installed but the board is not communicating, a message will appear in the "Select Detectors" screen informing the user that the hand probe is not communicating. Pressing F5 when choosing to view plateau data also selects the hand probe detector. Plateau data may be viewed even if the hand probe board has a communication failure. Special Considerations The Modular Detector Boards' operating voltages have been preset at 1550 vdc during the initial unit testing and checkout at Eberline's Santa Fe, New Mexico facility which is at @6480 ft. ASL. The MDB's have an upper operating voltage of 1750 vdc which the PCM-2's operating software deliberately limits. Users are, therefore, not allowed to set their operating voltages above this high limit. This feature of the PCM-2 software prevents detector high voltage arcing failure potential due to over-volting at sea level. The potential for over-volting does, however, exist at altitudes above sea level. The general rule for adjusting the MDB's operating voltage is to increase it by 30 vdc per each 1000 f1. of elevation drop below the initial 6480 ft. setup elevation in Santa Fe, NM. Users should try to minimize their MDB operating voltages, as much as possible for their monitoring needs, to avoid this destrUictive over-voltage ---------------_._-----_._.__ ._--_._~- ------------------- PCM2.MANI REV AI April 1995 7-3
arcing potential. Once a high voltage discharge "arc" path has been established in a detector, a minute amount of carbon is deposited at the point of discharge on the detector chamber. This carbon deposit then becomes a point of decreased resistance in the probe chamber for subsequent arc potential. If arcing is allowed to continue by further over-volting the detector, additional carbon deposits will occur due to arcing and the detector's performance will begin to deteriorate at an increasing rate. 7-4 PCM2.MAN/ Rev A/April 1995
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
Page 11 and 12: 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
Page 21 and 22: 1400 to 1900 volts) using long coun
Page 23 and 24: 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
Page 35 and 36: v./henever the above parameters are
Page 37 and 38: Where: R bkg = The new computed ave
Page 39 and 40: Alpha & Beta Sum Zone Alarm Alpha &
Page 41 and 42: R new = The most-recently measured
Page 43 and 44: Alpha & Beta Sum Zone Alarm Alpha &
Page 45 and 46: WF= Weight Factor R new = The most-
Page 47 and 48: Count Rate Units Activity Units Cou
Page 49 and 50: Hand Switch Req'd? Hip switch Req'd
Page 51 and 52: The alarm precedence scheme preclud
Page 53 and 54: The keyboard arrow keys may be used
Page 55: Background Plateau Source Plateau D
Page 59 and 60: 27.0 BACKGROUND PLATEAU - DETECTOR
Page 61 and 62: False Alarm Test Calibration Report
Page 63 and 64: Voice Annunciator Test boards are d
Page 65 and 66: Manual Ins ert: PCM-2 Personnel Con
Page 67 and 68: OPTIONS Hand Probe Option (PCM2 OPT
Page 69 and 70: performed as often as twice daily,
Page 71 and 72: exercising care to avoid detatching
Page 73 and 74: • Detector channels whose correct
Page 75 and 76: High & Low Count Fail Verify that t
Page 77 and 78: Section 11 Front Panel Board Genera
Page 79 and 80: Al6 is buffered to and from RS-232
Page 81 and 82: Connector Pinout: 06 DSR (from exte
Page 83 and 84: 09 Output bit 1 @ A003Dispiay 1 clo
Page 85 and 86: PCM-2 Front Panel Board, YP11526000
Page 87 and 88: Front Panel Board Schematic 11526-D
Page 89 and 90: ; P2 5 1 P3s 1 P4 5 ~ I o R;_-;;;;;
Page 91 and 92: Special Functions The RS-485 transm
Page 93 and 94: 8S I t\:l ~ NOTES: 1. RESISTANCE VA
Page 95 and 96: Section 13 Modular Detector Board G
Page 97 and 98: Setup and Calibration High voltage
Page 99 and 100: Modular Detector Board, YP11543000
Page 101 and 102: ~. ,,:Jrq II TJ2 I A2 CR2 CR3 CR4!
Page 103 and 104: ~ ~ Q.. >::: ...... ~ .., b "" :::
Page 105 and 106: position 1 2 3 - 8 SI-8 Switch Sett
Page 107 and 108:
PJ +5V AAAAA 1 1 ] .. ~ 'It GND ~ P
Page 109 and 110:
Section 15 Traffic Light Board Gene
Page 111 and 112:
\/\/\/\/\ 2 J 4 5 J 1 I , I 1\ I I'
Page 113 and 114:
Section 16 Detectors General Descri
Page 115 and 116:
Detector Part No. Detector Descript
Page 117 and 118:
Revised Detector \ssemblies Parts L
Page 119 and 120:
Reference 11534-D562 PCM-2 Revised
Page 121 and 122:
~ o ....: 0 ~ ,.; j l I ~' --------
Page 123 and 124:
0 -, ~ "
Page 125 and 126:
ef R---- Anod~ I\'ire Spnng ! I Imr
Page 127 and 128:
tones, which emanate from the perfo
Page 129 and 130:
vec "0 (\ ~ ..... I N Q "?;- ....
Page 131 and 132:
Revised Clicker Board Parts List Th
Page 133 and 134:
o n a o o ~Q -i-oL-CJ-~ a -1 SCJ ~
Page 135 and 136:
j---------------------l I p I I I I
Page 137 and 138:
Switches SW1-6 set the RS-485 board
Page 139 and 140:
Voice Annunciator Board, YP11513000
Page 141 and 142:
co N u ~ '" N U +~ co 0:: o~ ~ ~r
Page 143 and 144:
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 and 196:
4 req'd §r' J--~ o ' n m t : Det
Page 197 and 198:
Gas Management Option (PCM2 OPT12)
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 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 245 and 246:
Page 247 and 248:
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 294 and 295:
In Figure 6 the shaded area corresp
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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