Hanna Instruments HI 9023C Instruction Manual

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Hanna Instruments HI 9023C Instruction Manual Manual pdf 12 page image

23(1½") into the solution. For HI 9110 andHI 9210, place the thermometer closeto the pH electrode.• Adjust the OFFSET trimmer (#3 pages 9-10) until the LCD shows the pH value atthe buffer temperature (see page 24 for pH values at varioustemperatures). With HI 9210N, press RANGE to read the buffertemperature.• Rinse first with clean or distilled water and then with a smallamount of the next buffer (2nd calibration point). Dip theelectrode into pH 4.01 (or 10.01) buffer, stir gently and waituntil the display has stabilized.• Adjust the SLOPE trimmer (#4 pages 9-10) until the LCDdisplays the pH value at the second buffer temperature (seepage 24).• pH calibration is now complete. Once the calibration process iscomplete, replace the trimmer cover and tighten it to ensure aproper seal against water and humidity ingress.pHHI 700424Temperature has an effect on pH. The calibration buffer solutions areaffected by temperature changes to a lesser degree than normalsolutions.For manual temperature calibration (standard with HI 9110 andHI 9210 or optional with HI 9023C, HI 9024C and HI 9025C)please refer to the following chart.For instance, if the buffer temperature is 25 C, the display shouldshow pH 4.01, 7.01 or 10.01 at pH 4, 7 or 10 buffers, respectively.At 20 C, the display should show pH 4.00, 7.03 or 10.06. Themeter reading at 50 C will then be 4.06, 6.98 or 9.82.pppppH VALUES AT VARIOUSH VALUES AT VARIOUSH VALUES AT VARIOUSH VALUES AT VARIOUSH VALUES AT VARIOUSTEMPERATURESTEMPERATURESTEMPERATURESTEMPERATURESTEMPERATURESTEMP pH VALUES°C °F 4.01 6.86 7.01 9.18 10.01051015202530354045505560657032415059687786951041131221311401491584.014.004.004.004.004.014.024.034.044.054.064.074.094.114.126.986.956.926.906.886.866.856.846.846.836.836.846.846.856.857.137.107.077.047.037.017.006.996.986.986.986.986.986.996.999.469.399.339.279.229.189.149.109.079.049.018.998.978.958.9310.3210.2410.1810.1210.0610.019.969.929.889.859.829.799.779.769.75