User manual HANNA INSTRUMENTS HI 98321

[. . . ] Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. [. . . ] 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. Select either EC or TDS mode with the SET/HOLD button. 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. Press either button to return to normal mode. To turn the meter off Press the MODE button while in normal measurement mode. OFF will appear on the lower part of the display. 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 change the EC/TDS conversion factor (CONV) and the temperature compensation coefficient (BETA) · From measurement mode, press and hold the MODE button until TEMP and the current temperature unit are displayed on the lower LCD. TEMP °C. BATTERY REPLACEMENT The meter displays the remaining battery percentage every time it is switched on. [. . . ] 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. The CAL tag on the LCD means that the meter is calibrated. 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. [. . . ]