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<br />TR-66 2.05 - 43 09/24 <br />measures temperature in degrees Celsius and a Cole Parmer <br />microprocessor-controlled tester (Temptester). Range: -28 to <br />1500 C. Resolution: 10 C. Accruacy: +/-1% FS. <br /> <br />Dissolved oxygen - Horiba Model U-7, membrane type with <br />automatic temperature compensation to 0 to 400 C, galvanic <br />cell 0 to 20 ppm +/- 1.0 ppm. <br /> <br />The electronic water monitoring instruments may vary. <br />However, the stated accuracy of the instruments will be equal <br />to or greater than that listed above. <br /> <br />The pH meter and the conductivity meter are calibrated prior to <br />all sampling events. The pH meter is calibrated using the 2- <br />point method. The expected pH is bracketed by the pH of the <br />calibration solution. In most cases the pH meter will be <br />calibrated at 7.0 and 10.0 which will bracket all of the current <br />monitoring results. If an expected pH is less than 7, the pH <br />meter will be calibrated at 4.0 and 7.0. <br /> <br />Flow - One of two methods, 1) time of flow into a container of <br />known size and 2) utilize a portable 60" V-Notch weir. <br />