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02/01/1994 00:59 3024530791 VIRONEX NEWARK PAGE 02 <br /> •••• •i• �o i i.u uEJPRCBE SYSTE <br /> �rPAGE 01P641-RdPes 'Fax NOVO" 7g71Dernlots / <br /> T ^Z/— papas► <br /> Fool- <br /> cc <br /> P r <br /> P <br /> PURGING GAS VOLUMES C <br /> WITH THE GEOPROBE VACUUM/VOLUME SYSTEM <br /> Note that the vacuum pump is not operated during the sanspliug/purging proctss. <br /> Instead, the vacuum pump is operated between Sampling/purging points to return <br /> tike vacuum tank on the system to the issitial vacuum pressure. The change in <br /> pressure of the vacuum tank is thea used to indicate the volutue of sample gas being <br /> added to the tank. This change in gas volume in liters is indiented on the outer scale <br /> of the tank pressure gauge. <br /> If sampling through the I.D. of 1" dianteier probe rods (I.D. Is 1/2") use the <br /> fullowing approximate volunkes <br /> LAICL2 DES .RIPTIOIV ��. -APPROX. VOLliMr <br /> AT-10B 36"Probe Rod (1"a 3611) 100ai1/rod <br /> AT-1039 1M Probe Rod (111x lm) 100m1/rod <br /> - AT-1048 48"Probe Rod (I"x 48") 125nAlrod <br /> AT-1049 1.25M Probe Rod (11'x 1.25at) 125 ml/rod <br /> One inch O.D. diameter(1/2"I.D.) rods of different lengthy would have internal <br /> voitimes of approximate proportional values. <br /> If saaqPling tJirougli tubing. list the following approximate volumes <br /> TUBING SfLE GEOMOBE TUB NG INT RUAr ADAPTER <br /> P RT NA "- <br /> VOLUME (m1Jftl PART NO <br /> 1/8 in. I.D. TX12T 2.41 Pit-12S <br /> 3,2 min I.D. Teflon Tubing <br /> 0.17 in J.D. TB-17L 4.46 PR-17S <br /> 4,3 mos I.D. Polyethylene Tubing <br /> 3/16 in. LD. TB-17T 5.43 <br /> 4,8 mm I.D. Tenon Tubing . <br /> 1/4 6s. 1.D. TB-25L 9.65 PR-25S <br /> 6,4 min I.D. Polyethylene Tubing <br /> 5/16 fit. I.D. TB-30T 15.08 PR-30S <br /> 7,9 tutu LD. Tenon Tubing <br /> f 3 �Y+wfS �.C�` fy�t�`h�7�• TA< Liv/a..s.0 <br /> b7 3 <br /> 16 c�/+e`v i�b� a�pecsr. P�•J< uoly.rae <br />