User manual HANNA INSTRUMENTS HI 9811-5

[. . . ] During operation, ESD wrist straps should be worn to avoid possible damage to the electrode by electrostatic discharges. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. To avoid electrical shock, do not use these instruments when voltages at the measurement surface exceed 24 VAC or 60 VDC. To avoid damages or burns, do not perform any measurement in microwave ovens. WARRANTY HI 9811-5 is guaranteed for two years against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. [. . . ] Any defective item must be returned in the original packing together with the supplied accessories. HI 1285-5 Combination, amplified pH/EC/TDS probe with built-in temperature sensor, 8-pin DIN connector and 1 m (3. 3') cable Combination, amplified pH/EC/TDS/temperature probe with built-in temperature sensor, 8-pin DIN connector and 1 m (3. 3') cable pH BUFFER SOLUTIONS HI 7004L pH 4. 01 buffer solution, 500 mL bottle HI 7006L pH 6. 86 buffer solution, 500 mL bottle HI 7007L pH 7. 01 buffer solution, 500 mL bottle HI 7009L pH 9. 18 buffer solution, 500 mL bottle HI 7010L pH 10. 01 buffer solution, 500 mL bottle CONDUCTIVITY & TDS CALIBRATION SOLUTIONS HI 7031L 1413 µS/cm solution, 500 mL bottle HI 7032L 1382 ppm (mg/L) solution, 500 mL bottle OTHER SOLUTIONS HI 700661P Cleaning Solution, 20 mL sachet (25 pcs) HI 70300L Storage Solution, 500 mL bottle HI 7073L Protein Cleaning Solution, 500 mL bottle HI 7074L Inorganic Cleaning Solution, 500 mL bottle HI 7077L Oil & Fat Cleaning Solution, 500 mL bottle OTHER ACCESSORIES HI 710007 Shockproof rubber boot, blue HI 710008 Shockproof rubber boot, orange HI 710050 Blue protective case GENERAL DESCRIPTION HI 9811-5 is the complete, versatile, with a large LCD and splashproof portable combination meter designed with the utmost precision and simplicity. The instrument provides measurements for pH, EC and TDS ranges, which are easily selectable through the keypad on the front panel. Conductivity measurements are automatically compensated for temperature changes with a built-in temperature sensor. The temperature coefficient is fixed at 2%/°C. HI 9811-5 is a pH/EC/TDS meter designed for simplicity of use in taking pH, µS/cm, mg/L and temperature measurements. Suited for hydroponics, greenhouses, farming and ground water applications. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner. 14 3 FUNCTIONAL DESCRIPTION PROBE MAINTENANCE PERIODIC MAINTENANCE Inspect the probe and the cable. The cable used for the connection to the meter must be intact and there must be no points of broken insulation on the cable or cracks on the probe stem or bulb. Connector must be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. CLEANING PROCEDURE For better accuracy in measurements and to ensure a good performance of the probe, a frequent cleaning is recommended. For this purpose, soak it in Hanna HI 700661 Cleaning Solution for 5 minutes. Notes: · For particular dirty (as for example protein, oil or grease) see the "Accessories" section for Hanna specific solutions. · After cleaning the probe, it is recommended to recalibrate the meter. If it is not possible to calibrate, the probe has to be replaced with a new one. · For field applications, it is always recommended to keep a spare probe handy. When anomalies are not resolved with simple maintenance, change the probe and recalibrate the meter. 1) 2) 3) 4) 5) 6) 7) 8) 9) 8-pin DIN connector for probe Liquid Crystal Display pH range selection key µS/cm (EC) range selection key mg/L (TDS) selection key pH offset calibration knob EC/TDS calibration knob °C (Temperature) selection key On/Off key 4 13 BATTERY REPLACEMENT These meters are powered by a 9V battery that is located on the rear of the instrument. When battery symbol is empty a low battery condition is indicated. Range SPECIFICATIONS 0. 0 to 14. 0 pH 0 to 6000 µS/cm 0 to 3000 mg/L 0. 0 to 70. 0 °C 0. 1 pH 10 µS/cm 10 mg/L 0. 1 °C ±0. 1 pH ±2% f. s. mg/L ±0. 5 °C ±0. 1 pH ±2% f. s. mg/L ±0. 5 °C 0. 5 Manual, 1-point through offset trimmer Manual, 1-point through slope trimmer Automatic from 0 to 50 °C (32 to 122 °F) with =2%/°C HI 1285-5 1 x 9V alkaline Approx. 150 hours of continuouse use 0 to 50 °C (32 to 122 °F) 100% RH 145 x 80 x 36 mm (5. 7 x 3. 1 x 1. 4") 230 g (8. 1 oz. ) When the low battery indication appears, only a few hours of working time remains. It is recommended to replace the battery immediately. [. . . ] · Press the µS/cm (or mg/L) key. · Turn the EC/TDS calibration knob until the display shows the EC or TDS reading at 25°C. EC/TDS CONVERSION FACTOR The TDS value in aqueous solutions is directly proportional to the conductivity. The ratio between the two parameters depends on the solution. HI 9811-5 model has a fixed conversion factor set to 0. 5. [. . . ]