User manual HANNA INSTRUMENTS HI 983301N

[. . . ] These instruments are in compliance with the directives. FUNCTIONAL DESCRIPTION EC Range Resolution SPECIFICATIONS ­ HI 983302N 0. 00 to 9. 99 mS/cm 0. 01 mS/cm ±2% f. s. Automatic 5 to 50°C (41 to 122°F) Manual with one trimmer HI 7632 (fixed) IP54 12 Vdc adapter (included) 86 x 110 x 43 mm (3. 4 x 4. 3 x 1. 7") 215 g (7. 6 oz) ­ HI 983301N & HI 983301N/5 0 to 1990 mg/L (ppm) 10 mg/L (ppm) ±2% f. s. 0. 7 (HI 983301N) 0. 5 (HI 983301N/5) Automatic 5 to 50°C (41 to 122°F) Manual with one trimmer HI 7634 (fixed) IP54 12 Vdc adapter (included) 86 x 110 x 43 mm (3. 4 x 4. 3 x 1. 7") 215 g (7. 6 oz) On-line, Waterproof EC-TDS meter with large LCD PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully. [. . . ] When shipping any instrument, make sure it is properly packaged for complete protection. Reproduction in whole or in part is prohibited without the written consent of the copyright owner. GENERAL DESCRIPTION EC and TDS are instruments specially designed to meet the needs of growers in greenhouses hydroponic applications. They are equipped with a large display for an easy reading also from distance. You can simply hang the meter right above the sample to be tested for continuous measurement and the unit will run without interruption on 12 Vdc power supply. The meters are supplied with a probe that automatically compensates for the temperature variation. Measurements are highly accurate and the meters can be calibrated at one point. In addition, the two TDS use a specially devised formula which perfectly reflects the needs of growers. In fact, the TDS factor of the HI 983301N model is 0. 7 while for the HI 983301N/5 is 0. 5. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. OPERATIONAL GUIDE TAKING MEASUREMENTS · Turn the meter on by connecting the 12 Vdc power adapter to the meter and to the mains. · Immerse the tip (4 cm / 1½") of the probe in the sample. Note: In order not to affect the accuracy of measurements, it is important that the probe body does not touch nor stand close to the side walls of the vessel. Any initial variation of reading may be due to temperature compensation and to the fact that the probe is adjusting itself to the new sample. Allow the reading to stabilize and the meter will start continuous monitoring. CALIBRATION For the greatest accuracy, frequent calibration of the instrument is recommended. · Pour a small quantity of the indicated calibration solution in a beaker: 1413 µS/cm for HI 983302N, 1500 ppm for HI 983301N or 1382 ppm for HI 983301N/5. · Immerse the EC or TDS probe in the solution, making sure that metal pins are completely submerged. Note: the probe should be submerged approximately 4 cm (1½") in the solution and it does not touch nor stand close to the side walls of the beaker. · Wait for a couple of minutes for thermal equilibrium to be reached. [. . . ] The metal band at the end of the probe is sensitive to electrostatic discharges. During operation, ESD wrist straps should be worn to avoid possible damage to the probe by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. [. . . ]