User manual HANNA INSTRUMENTS HI 98312

[. . . ] These instruments are in compliance with the directives. FUNCTIONAL DESCRIPTION Range SPECIFICATIONS 0. 0 to 60. 0°C / 32. 0 to 140. 0°F 0 to 3999 µS/cm (HI 98311) 0. 00 to 20. 00 mS/cm (HI 98312) 0 to 2000 ppm (HI 98311) 0. 00 to 10. 00 ppt (HI 98312) Resolution 0. 1°C / 0. 1°F 1 µS/cm ; 1 ppm (HI 98311) 0. 01 mS/cm ; 0. 01 ppt (HI 98312) Accuracy (@20°C/68°F) 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. Each meter is supplied with: · HI 73311 EC/TDS probe · HI 73128 probe removal tool · batteries (4 x 1. 5V) and instructions Note: Conserve all packing material until the instrument has been observed to function correctly. Any defective item must be returned in its original packing. ±0. 5°C / ±1°F ±2% f. s. [. . . ] Measurements are highly accurate with a unique stability indicator right on the LCD. 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 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. 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. 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. To turn the meter off Press the /MODE button while in normal measuring mode. 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. In addition, the instrument must be recalibrated whenever: a) The EC/TDS probe is replaced. [. . . ] · 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. To reset to the default calibration To clear a previous calibration, press the MODE button after entering the calibration mode. [. . . ]