User manual HANNA INSTRUMENTS HI 87314

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Manual abstract: user guide HANNA INSTRUMENTS HI 87314

Detailed instructions for use are in the User's Guide.

[. . . ] This warranty is limited to repair or replacement free of charge. 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. [. . . ] Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance. To avoid damages or burns, do not perform any measurement in microwave ovens. Battery Life Environment Dimensions Weight OPERATIONAL GUIDE INITIAL PREPARATION The meter is supplied complete with a 9V battery (not rechargeable). Remove the battery compartment cover on the back of the meter, install the battery while paying attention to its polarity. Connect the desired probe (HI 76302W for EC or HI 3316D for resistivity measurements) to the DIN socket on the top of the meter. The instrument will automatically recognize which probe is connected. Turn the meter ON by pressing the ON/OFF key. 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) or HI 7034 (80 mS/cm) conductivity solution. For the µS ranges, use HI 7031 (1413 µS/cm) for the 0 to 1999 µS/cm range, or HI 7033 (84 µS/cm) for the 0 to 199. 9 µS/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 µS if calibrating with HI 7033 solution, 1999 µS 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 conductivity calibration trimmer located in the battery compartment, to read the calibration solution value @25°C (77°F). · All subsequent measurements will be referenced to 25°C. · If you need to reference the measurements to 20°C, adjust the calibration knob to read the calibration solution value @20°C (68°F). temperature chart on the calibration solution sachet or bottle label. · Calibration is now complete and the instrument is ready for use. 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. · Immerse the probe in a solution of known resistivity value, and wait for the reading to stabilize. [. . . ] 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. Replacement must only take place in a safe area using an alkaline 9V battery. You can also install a 9V rechargeable battery and recharge it using the optional HI 710040 battery charger. [. . . ]

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