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r <br /> RECORD OF CALIBRATION <br /> _pH_ <br /> Date: 0�-06 -- 0 �_ Personnel: S E2Bfi-r+ �. <br /> Instrument brand: � )A-(f C O <br /> Known pH for standard !: 2,M <br /> Known pH for standard 2: 4 OQ <br /> Pre-calibration .instrument reading: Standard Y: 36 Standard 2: 2-3 <br /> Post-caligation instrument readings; Standard 1: 02- Standard 2: 4 60 <br /> Temperature: V 14F <br /> Comment— <br /> I = 5 LI !.0. S 2 r-0 2 O t1 - <br />