User manual HANNA INSTRUMENTS HI 216

[. . . ] 3 FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OPERATIONAL GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Tap the probe lightly on the bottom of the beaker to remove any air bubbles trapped inside the sleeve. · Adjust the conductivity TC knob to the temperature coefficient value of the solution (see "Determination of the temperature coefficient of a solution" section for details). · Select the appropriate conductivity range, by pressing the corresponding key. Note: If the display shows "1", the reading is over-range. · Allow a few minutes for the reading to stabilize, and the LCD will display the temperature compensated conductivity reading. Note: If the display shows "1", the reading is over-range. · The reading is automatically corrected for temperature variations by using the linear compensation method: R25=Rt(1+(t-25)) where Rt is the resistivity at the temperature t, and the reference temperature is 25ºC. · The temperature coefficient is selectable through a front knob, from 2 to 7%/°C. 6 7 CALIBRATION CONDUCTIVITY CALIBRATION · It is recommended to calibrate the instrument for the conductivity range at least once a month, or when the probe is changed. · For better accuracy, choose a solution with a conductivity value close to the sample to be measured. If you are measuring in the mS ranges, calibrate the meter using the HI 7030 (12. 88 mS/cm @25°C) or HI 7034 (80 mS/cm @25°C) conductivity solution. For the S ranges, use HI 7031 (1413 S/cm @25°C) when calibrating in the range from 0 to 1999 S/cm, or HI 7033 (84 S/cm @25°C) for the 0 to 199. 9 S/cm range. · Rinse the probe thoroughly with distilled water and, if possible, use plastic beakers to minimize any EMC interferences. · Pour a small quantity of the desired conductivity solution into a plastic beaker, and immerse the probe while making sure that the holes of the sleeve are completely submerged. Tap the probe lightly on the bottom of the beaker to remove any air bubbles trapped inside the sleeve. · Adjust the conductivity TC knob to 2%/°C. · Select the appropriate measurement range: 199. 9 S if calibrating with HI 7033 solution, 1999 S for HI 7031, 19. 99 mS for HI 7030, or 199. 9 mS for HI 7034. Note: If the display shows "1", the reading is over-range. · Allow a few minutes for the reading to stabilize and adjust the calibration knob to read the calibration solution value @25°C. · All subsequent measurements will be referenced to 25°C (77°F). · If you need to reference the measurements to 20°C (68°F), adjust the calibration knob to read the calibration solution value @20°C. · Calibration is now complete and the instrument is ready for use. CONDUCTIVITY VS. TEMPERATURE CHART °C 0 5 10 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 °F 32 41 50 59 60. 8 62. 6 64. 4 66. 2 68 69. 8 71. 6 73. 4 75. 2 77 78. 8 80. 6 82. 4 84. 2 86 87. 8 HI 7030 (S/cm) HI 7031 (S/cm) HI 7033 (S/cm) HI 7034 (S/cm) HI 7035 (S/cm) HI 7039 (S/cm) 7150 8220 9330 10480 10720 10950 11190 11430 11670 11910 12150 12390 12640 12880 13130 13370 13620 13870 14120 14370 776 896 1020 1147 1173 1199 1225 1251 1278 1305 1332 1359 1386 1413 1440 1467 1494 1521 1548 1575 64 65 67 68 70 71 73 74 76 78 79 81 82 84 86 87 89 90 92 94 48300 53500 59600 65400 67200 68500 69800 71300 72400 74000 75200 76500 78300 80000 81300 83000 84900 86300 88200 90000 65400 74100 83200 92500 94400 96300 98200 100200 102100 104000 105900 107900 109800 111800 113800 115700 117700 119700 121800 123900 2760 3180 3615 4063 4155 4245 4337 4429 4523 4617 4711 4805 4902 5000 5096 5190 5286 5383 5479 5575 RESISTIVITY CALIBRATION · The meter is factory calibrated for resistivity range, and usually needs recalibration only after a resistivity probe replacement. In this case, follow the below instructions. [. . . ] Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. 6296. 7118 · Fax 6291. 6906 MAN216 South Africa: Tel. [. . . ]