User manual HANNA INSTRUMENTS HI 98129

[. . . ] www. hannainst. com This Instrument is in Compliance with CE Directives Typical EMC Deviation Temperature ±0. 5°C or ±1°F WARRANTY HI 98129 and HI 98130 are warranted for one year against defects in workmanship and materials when used for their intended purpose and maintained according to instructions. The electrode is warranted for a period of six months. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. [. . . ] To avoid damages or burns, do not perform any measurement in microwave ovens. ISTR98129R2 01/02 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. 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. · 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 CAL symbol on the LCD will disappear. The meter will be reset to the default calibration. · 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. bration) or pH 6. 86 BUFF (for NIST 4. 01/6. 86/9. 18 calibration). · Press the SET/HOLD button to change the buffer value. · Press the MODE button to return to normal measuring mode. Calibration procedure From measurement mode, press and hold the MODE button until CAL is displayed on the lower LCD. The LCD will display pH 7. 01 USE or pH 6. 86 USE (if you have selected the NIST buffer set). · For a single-point pH calibration, place the electrode in any buffer from the selected buffer set (eg. The meter will recognize the buffer value automatically. If using pH 4. 01 or pH 10. 01, the meter will display OK for 1 second and then return to measurement mode. [. . . ] To change the batteries, remove the 4 screws located on the top of the meter. pH ELECTRODE MAINTENANCE · When not in use, rinse the electrode with water to minimize contamination and store it with a few drops of storage (HI 70300) or pH 7 (HI 7007) solution in the protective cap after use. DO NOT USE DISTILLED OR DEIONIZED WATER FOR STORAGE PURPOSES. · If the electrode has been left dry, soak in a storage or pH 7 solution for at least one hour to reactivate it. · To prolong the life of the pH electrode, it is recommended to clean it monthly by immersing it in the HI 7061 cleaning solution for half an hour. [. . . ]