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x 'R w a. <br /> I <br /> GROUNDWATER '!'NC®3OLAf'Y <br /> STANDARI3 OPERATING PROCEMRE <br /> CONCERNING OPERATION/CALIBP_?.TION OF <br /> pHOTO-IONIZATION ANALYZER <br /> sop 19 <br /> The IM Model 101 Photo-ionization Analyzer sha11-beeused to <br /> of <br /> measure the concentration of trace gasps over a <br /> less than ' part per million (ppm) to 2,000 ppm by <br /> employing the principle of photo-ionization for detection. <br /> The specific instrument used for investigations related to <br /> hydrocarbon contamination should be calibrated for direct <br /> ble <br /> readings ill ppm volume/volusae of benzene. This =ob <br /> field analyzer coeawhich <br /> nsists of two components: 1) p <br /> contains a fan for moltra- <br /> ving air into the sensan+ionization <br /> violet light (provides ionization energy) , <br /> chamber and signal amplifier; 2) readout assembly which <br /> contains a battery, ion chamber bias, meter-readout <br /> uand <br /> theory <br /> control panel. Specifics of the detection found Ple/ <br /> n the <br /> and functions of various components ccs ste ,Inc. ) . <br /> manufacture's instruction manual (HNU Y <br /> ie, the potoanal <br /> on <br /> To assure optimumerwithaacstandardngas-mixture�of knownzer <br /> should be calibrated <br /> concentration from a pressurized container• thecracking <br /> and <br /> procedure far calibration itoothescalibratgion gas, cracking <br /> readout in close proximity the instrument reading. <br /> the valve on the tank and checking <br /> ' This provides a useful spot check for the instrument. <br /> p, procedure conducted weekly for more accurate calibration <br /> 4.x of the instrument from a pressurized container is to canned <br /> one side of a "T" to the pressurized container of calibra- <br /> tion gas, another side of the "T" to a rotameter and the <br /> �x third side of the "T" directly to the a-inch extension to <br /> ation probe. Crack the valve t, <br /> f the <br /> the photo-ionizon <br /> pressurized containeThe �nsttrumentsdraws inothesvolume dofdsample <br /> �,. the rotameter. ec <br /> tion, and the flow in the rotameterso <br /> required for detess of ec <br /> indicatesan <br /> exc instrument is reading the exacts value of the <br /> pot <br /> the <br /> that the <br /> calibration gas. (If the instrument span setting s <br /> R changed, the instrument should be turned back to the standby <br /> c zero should be readjusted, if <br /> position and the electroni <br /> necessary) . <br /> E <br /> I TCCH%o")CN,lac. <br />