Laserfiche WebLink
0 <br /> GROUNDWATER TECHNOLOGY <br /> _ STANDARD• OPERATING PFOCEDURE <br /> CONCERNING OPERATION/CALIBRATION OF <br /> PHOTOIgNIZATION ANALYZER <br /> r SOP.19 <br /> The :IINU Model 101 Photoionization Analyzer <br /> used ,to measure the concentration of trace gases over a <br /> range of legs than I ppm to'.2,000 �ipm. b <br /> print#ple of photoi0nizatioin..for detectiorim then the <br /> Specific instrument used for, 'irivetigat_ion,s related to <br /> hydrocarbon contamination should �be �alibrated for <br /> diidat•"readings In parts,',per - illfon <br /> of -.14nzene, . This portable fi'e'jd anal'YPRr 11'i e/ ofume <br /> two COMponentcs (1) probe :wh:lch 'coma $ :a• fan .for` <br /> Oir into the sensor,. an ultravimoving <br /> olet 1Yght.-(provi�es <br /> kation On6rgy), mides <br /> n. 16niihtion c a bez `anc3.:si <br /> amPfr '.(2) readoeit. assemb'l'y which coiitain;.-41 '-battery, <br /> ' .. ion,chaber bias, mater <br /> readout and. contxal. <br /> SPecif � of the detection. principle/tli�ory andel. <br /> functions <br /> of varSoua components can be found iri 'the,.manufacttares <br /> nstuction manual (liIU' Systems, xnc. j::: <br /> : .To atasUre oPt:imUm performance, 'the I toicnzzation:analy- <br /> zer .should be caliEirated with'a :standard gas.mixture of <br /> i known .concentrAtiori.from a pressurized mixture <br /> � 'A <br /> daily . roaedurL-• for',calibration:'involves',lirir�giriq. the ' <br /> probe and readout in-close.'Proximity. to the. calibration <br /> gas,•;:crackin9 the valve bn the tank and '.chi eking the <br /> instrument reading. This provides a ase uc6k <br /> for the instrument. � spot check <br /> A procedure cone, <br /> ucted weekly for more <br /> on accurate calibre <br /> tiof the instrument from a' <br /> to connect one side of a "T" ':tortheurized container-is <br /> of ca'13brati0 gas, another side of.thes'°T"�toa-a�rotameter <br /> i ontain <br /> and 'the' third side of. th.e.."Tp,:-'.directly to <br /> the ,:9''. extension <br /> s; to •the;`photoionization .' robe <br /> P E en. 'Fi.gAre,,2 _ .'Crack .the <br /> valve•;of the pressurized ,containeaC -ciniY a s�.ight flc�► .is <br /> inaTcrea ori 'the rotameta;r xIie x.nst'rlinient- Ya:�s.':in .the <br /> volume.;®f sample required forc3etection,. and . 'he-' .1cw 3n <br /> the'kotamater indicates an ;excests.:;of;`sdmpye. :Now`'ac� ust <br /> the 'span pot';so that th'e: fratri meht:..is x "" " <br /> 1 g the exacts.-of value.' of the calibration qac., f.If:. the instziititenfi: span- - <br /> settihg; 3s- changed, the .in'strumgnt.should 'be .tund, back - - -- <br /> t; `standby position. and- the•electronic zero'""sho�ild:; <br /> �. be''.read justec3, if .necessary} <br /> 1F <br /> GROUNDWATER_ <br /> TECHNOLOGY,INC.. <br /> COlvsutTINQ GROUNRWATER GEOLOGISTS <br />