
                          FIEL REPORT


Date          12/16/83


Customer      J Alle  Dimensio Support


Location      Burlingam Offic  Penninsul Hospital


By            Bo Gropp (Engineering)
               Nor Tillbur (Custome Service)



O Friday Decembe 16 1983  mad  visi alon wit Nor 
Tillbury t th busines offic o J Allen  The hav bee 
complainin o problem wit system whic the hav installe i 
hospital aroun th Ba are an L.A  Sinc the claime tha 
th system woul di o comman a thei locatio whe  T.V o 
dril wa turne of w sen Nor t investigat (abou tw week 
ago)  Nor checke th revisio leve o th board an planne 
 retur tri t updat thei boards I th meantim the coul 
no ge th system t fail.

 decide t visi th sit t chec o wirin an groundin i 
th compute systems  Sinc the ha bee buil quit  whil 
ag an th custome though th proble wa relate t power, 
suspecte incorrec groun wirin whic  di no find   di 
fin tha th Dj/DM an MPZ8 board i th  system i thei 
offic wer no curren revisio leve an s w brough the u 
t curren level whil there  I additio w foun tha the 
hav bee modifyin thei MPZ8 board t ru a slowe speeds  
I turn ou the hav  wir-wra board the instal i ou 
system an the wil no ru a ou norma syste speeds  

Th syste whic ha bee remove fro thei Watsonvill 
installatio wa bein use b th enginee fo da t da 
devlopemen an testin withou  problem  Whe w powere i o 
howeve  detecte  ver hig pitc soun (inaudibl t Nor an 
th engineer probabl aroun 1 Khz  Sinc th norma switchin 
frequenc i aroun 2 Khz w remove th syste fo replacemen 
o th suppl b custome service.

W visite thei Penninsul hospita locatio t se wha thei 
typica installatio wa like  W intende t brin wit u  
powe lin disturbanc monito fro Leasametric bu th onl on 
the ha availabl turne ou t b inadequate I wa th 
feelin o th Dimensio Suppor enginne tha th environmen i 
th hospital wa "severe an extremel nois electrically  I 
woul hav bee idea i w coul hav measure th line ove  
lon perio bu th tes equipmen wa no available   di measur 11 VA an ver littl nois o Frida wit m scop 
(ove  ver shor sampl perio however).

Th perso i th compute roo wa unabl t sa exactl whe 
th las proble ha occurre althoug thei termina (no  
Morrow ha die  day earlier  Eve thoug w ha suggeste  
proble log ther wa n suc record  

Thei syste wa connecte t 10,00 f o cabl whic wa tie 
t syste ground  Ther wa als  ru withou ant-stati ma 
i th room  Th compute wa plugge int th wal directly 
withou a isolatio transformer  Th MPZ8 i th syste wa 
no curren revisio bu w wer unabl t upgrad i du t 
thei modification t th board  W recommende the replac i 
wit on fro th  system i thei offic whic w updated.

I i importan t not tha th system faile durin th summe 
an th enginne ha no bee abl t ge the t fai i hi 
location  H als state tha al o th board the buil an 
installe o thei T.V set i th hospital die s ofte tha 
the ha t pu  remot rese o the fo reliabilit reasons.

 stil suggeste the monito th A line fo  week an ge 
al thei system t curren levels  The shoul als pu i 
anti-stati mat an kee lo book o th systems.


Ther i als  posibilit o  proble wit thei custo 
softwar o thei custo hardwar whe i ou systems.


Bo Groppo
12/17/83
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