User manual HANNA INSTRUMENTS HI 98312

[. . . ] Battery compartment Liquid Crystal Display (LCD) ON/OFF/MODE button HI 73311 EC/TDS probe Temperature sensor Probe (included) Battery Auto-off Type/Life HI 73311 EC/TDS probe 4 x 1. 5V with BEPS/approx. 100 hours After 8 minutes of non-use 163 x 40 x 26 mm (6. 4 x 1. 6 x 1. 0") 100 g (3. 5 oz. ) WARRANTY HI 98311 and HI 98312 are warranted for one year against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. The probe is warranted for a period of six months. This warranty is limited to repair or replacement free of charge. [. . . ] The HI 73311 EC/TDS probe, supplied with the meter, is interchangeable and can be easily replaced by the user. The stainless steel encapsulated temperature sensor facilitates faster and more accurate temperature measurement and compensation. Dimensions Weight SET/HOLD button Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. 1. Automatic temperature compensation indicator 2. Measuring units for primary display Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential areas could cause unacceptable interferences to radio and TV equipment. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance. To avoid electrical shock, do not use this instrument 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. IST98311R3 07/05 OPERATIONAL GUIDE To turn the meter on and to check battery status /MODE button for 2-3 secPress and hold the onds. All the used segments on the LCD will be visible for a few seconds, followed by a percent indication of the remaining battery life (E. g. Taking measurements Submerge the probe in the solution to be tested. Use plastic beakers to minimize any electromagnetic interferences. Select either EC or TDS mode with the SET/HOLD button. The measurements should be taken when the stability symbol on the top left of the LCD disappears. The EC (or TDS) value automatically compensated for temperature is shown on the primary LCD while the secondary LCD shows the temperature of the sample. To change the temperature unit To change the temperature unit (from °C to °F), from measurement mode, press and hold the /MODE button until TEMP and the current temperature unit are displayed on the lower portion of the LCD (E. g. Use the SET/HOLD button to change the temperature unit, and then press the /MODE button twice to return to the normal measuring mode. To freeze the display Press the SET/HOLD button for 2-3 seconds until HOLD appears on the secondary display. Press either button to return to the normal measuring mode. To turn the meter off Press the /MODE button while in normal measuring mode. OFF will appear on the lower part of the display. Notes: · Before taking any measurement make sure the meter has been calibrated. · If measurements are taken in different samples successively, rinse the probe thoroughly to eliminate cross-contamination; and after cleaning, rinse the probe with some of the sample to be measured. CALIBRATION For better accuracy, frequent calibration of the instrument is recommended. [. . . ] · Release the button and immerse the probe in the proper calibration solution: HI 7031 (1413 µS/cm) for HI 98311 and HI 7030 (12. 88 mS/cm) for HI 98312. · Once the calibration has been automatically performed, the LCD will display OK for 1 second and the meter will return to normal measurement mode. · Since there is a known relathionship between EC and TDS readings, it is not necessary to calibrate the meter in TDS. If the EC/TDS conversion factor is either 0. 5 or 0. 7, the meter will allow a direct calibration in ppm by using the Hanna calibration solutions listed below. [. . . ]