Document jyVb68bzoryLLJ99g9LYLD7YQ

_!i Anniston, Alabama iSr* H, 0, Eehner Plant B r-fy/S, >5^. ^ 31, 1940 He ssrs. K#I# Jenkins - C.E. Put gin F^ai II. Hardy J Stickly - Plcnt B C Barbra - D.B, Eosnor - Plant B H.OJI, to R*L#!T# y,j, Holzapfel - Plant B 4/21/48 Aroclor 126C -- Viscosity Determination *rt * V^'T' i- . 4> > -{S' 4 /js - i* ' <" - u f ''> --.rdA- A jNj-k 3&&* V'* d' ,; Any comments whichwe would have made in answer toyour memos of 3/A4/48 end 4/21/48 on this subject would be valueless unless critloal date were ev&lleble In our laboratory# Therefore, we amlt^d the arrival of your sample s for making our study# The test samples have been measured to the best oi bur knowledge as you have desired# Referee and atandardizati^-conflitioha have been uaed with the exception of one factor which we couK~not-eosWs^., Ihe room tenperature approached 97*?# on the day teste were mad^tnd it was above 86*F# during all tests# This high temperature, sceorSiK^g to ABTSi D 83-44, may introduce errors up to 1%, A^^yOu^onsider our re suite please keep this In mind# It will help axpJAjd different results obtained on standards at various times during the y Samples of Aroclor 1260, Lota E-s^x X-9 were tested after standardizing our viscosity tube with your s&aple-,, API Oil Itand&rd Alpha 47, Testa were made by two'diffprpnt-en^lyats Lag in rotation. API Oil 3f 7 (Bated Kardh 25, 1947) ty (Saybolt Unlversal Seconds) 210*?. Certlfica Analyst Averu Correction needed 51*7 SI *4 51*4 51.4 51.3 51.4 51.38 0,32 j:-'y- J'f , DSW 330828 STLCOPCB4077472 Mr* S* 0. Erimer - - May 11, 1948 Vv-. : Arottlor 1260 from Plant B Sample U-85 A ' W Viscosity (;gaybolt Universal reconds) 10*f. =- ~`A^A ,p.v )p,; A":-'A- 1a Average (un corrected) Average (corrected) A-$ A B A B a , : , ' .. . \ : '. . .. ' ,1;-pa Average (uacorrected) v Average (corrected) / 3 Our Q3ureJfaenta arc made with^/donventi&j!al stopwatch, tut it has not been checked lately* Vrovi^a checra/with standard oil have been satisfactory, thuc leading all ca^e-rji^to believe that the stopwatch is precise enough* v' Sine# your recent let Ion that the previously re ported comparison ml y errors in your timer, no Cozsaenta will t map.- ' ' - '/ f' Tour principle that Xtha correction factor la .proportional to the time of flow aa^comp^ed vaxthfir_afefipdardlaatian time agrees with our views on this /Subject* HOrtevcbj-i'mve read no authority on viscosity measure-. monte* /have added a correction Is the above comparative tests in aoeordai/ce with tbipVeaaoning* >: ;>",v . V'' * , On staiidia'disatlojytcDts made lest fall, no correction nas found accessary for our vufceJL_J3*^yefore bo have not made any corrections to our routine teasurejenti)b A-' ' ' ^ * *vV. >/, v . . -..-.v v.- . j;: r" . .. - V-- ^ . . =W-v;- Our Bethoa of handling. Aroclor?-.iBBBl.ce la aisdlnr to yCur routine* . Semple bottles arc warmed until the contents are evenly heated to 60 -- 80*C* A clear beaker is then filled by straining the Aroelor. Eo further straining is considered necessary when filling the viscosity tube* Con- trory to your finding we do not heat the Aroelor over the 3?. rice stipulated by Ag'Bi, however, this has no bearing on the re suite In ray opinion. The both temperature required to maintain'the Aroelor samples at 210,,f . was found to be 11.4 - 211.6*F. in the cosjpnrison work with your samples* DSW 330829 STLCOPCB4077473 Hr. H. 0. Behnar * s ** my 11, 1948 We ran routine test* on Aroclor at only one temperature, so we have no infoiraation on the variance In the correction factor with tempera ture. ?Unc the viscosity coefficients of two liquids very in direct proportion to the densities and the times of flow, lt ls reasonabie to assume that for liquids of approximately the same density that time la the mejo? consideration* ` In converting from Saybolt to Centlpoieaalt la iaoeoe^arjf} a .density factor, so the. density can he eltwinsted i|p i'fvGa. our'coiudderaUan, therefore ,\IhwaI,d add .tfefe'Jstee eorreetier W fbetor fo$:>$i tine* etall tempifatarep* In;:flffeher words:^e;/iae h?\ factor at 50 3tJ3ihether taken at 1O0*F# or 210*F swuld he added * The' proportional factor would he used on the eorreetlon far longer or shorter times of floar, Calibration at another temperature'Vith the same oil would he repaired to caswer the Ration definite On reviewing your General Method. - 25 on Scybolt these comments are cade under the sane nug' write-up. '\ . ...:';?v';:^, , versal Viscosity, jig as used in your 1. I presume that your flash* wer^ lzed at 2 2* C* In the use of a stlrrl similarly to the aetho touching the hottest. Th to the orifice* t he wise to support it eat the therso&eter from mtnate any accidental damage We hope that this cof^fe-ria'5^of\S.^ta Mil he of vulu in ohtsinir agreement between tbe/tw labor^W-leai^Let ua know if we can be of further h$lp in erriylng at a satisfactory conclusion to the viscosity differences between!konsanto and] General Klectrlc Compsny. ... : Mtn Y^.r tK -` . f- V; A' `i r .. . i.: A. K. Sllcnburg OS*350,110 STLCOPCB4077474