User manual HANNA INSTRUMENTS HI 98321

[. . . ] These instruments are in compliance with the directives. FUNCTIONAL DESCRIPTION SPECIFICATIONS Range Temperature: HI 98321 HI 98322 Resolution HI 98321 HI 98322 Accuracy (@20°C/68°F) 0. 0 to 60. 0°C or 32. 0 to 140. 0°F EC: 0 to 3999 µS/cm TDS: 0 to 2000 ppm EC: 0. 00 to 20. 00 mS/cm TDS: 0. 00 to 10. 00 ppt 0. 1°C or 0. 1°F 1 µS/cm ; 1 ppm 0. 01 mS/cm ; 0. 01 ppt Temperature ±0. 5°C or ±1°F EC/TDS ±2% f. s. ±2% f. s. PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully. If any damage has occurred during shipment, immediately notify your Dealer or the nearest Hanna Customer Service Center. The meters are supplied with: · HI 7031 1413 µS/cm calibration solution, 20 mL sachet (for HI 98321) · HI 7030 12. 88 mS/cm calibration solution, 20 mL sachet (for HI 98322) · 4 x 1. 5V AA batteries · Instruction manual Note: Conserve all packing material until the instrument has been observed to function correctly. [. . . ] A low battery symbol warns the user when the batteries are to be replaced. In addition the Battery Error Prevention System (BEPS) avoids erroneous reading caused by low voltage level by turning the meter off. The built-in temperature and EC/TDS sensors are protected inside the cell cup. 1. Stability indicator 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. ISTR98321R2 05/02 Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. OPERATIONAL GUIDE To turn the meter on and to check battery status Press and hold the MODE button for 2-3 seconds. All the used segments on the LCD will be visible for a few seconds, followed by a percent indication of the remaining battery life. Taking measurements Rinse and fill the cell cup with the solution to be tested. The measurements should be taken when the stability symbol ¹ 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 LCD. Use the SET/HOLD button to change the temperature unit, and then press MODE button twice to return to normal measurement mode. To freeze the display Press the SET/HOLD button for 2-3 seconds until HOLD appears on the secondary display. To turn the meter off Press the MODE button while in normal measurement mode. Notes: Notes · Before taking any measurement make sure the meter has been calibrated. · If measurements are taken in different samples successively, rinse the cell cup thoroughly to eliminate cross-contamination; and after cleaning, rinse it with some of the sample to be measured. CALIBRATION For better accuracy, frequent calibration of the instrument is recommended. In addition, the instrument must be recalibrated whenever: a) After testing aggressive chemicals. [. . . ] To reset to the default calibration To clear a previous calibration, press the MODE button after entering the calibration mode. The lower LCD will display ESC for 1 second and the meter will return to normal measurement mode. The meter will be reset to the default calibration. To change the batteries, remove the 4 screws located on the bottom of the meter. Remove the screw and the washer in the battery compartment and carefully replace the 4 batteries located in the compartment while paying attention to their polarity. [. . . ]