Hanna Instruments HI 98240 Instruction Manual

Contents

Hanna Instruments HI 98240 Instruction Manual Manual pdf 4 page image

76INITIAL PREPARATIONEach meter is supplied complete with batteries. Remove the backcover, unwrap the batteries and install them while paying attentionto the polarity. Alternatively, connect the supplied 12 Vdc adapter tothe power adapter plug.To prepare the instrument for use, connect the pH or ORP (HI 98240only) electrode to the connector located on the top of the instrument.To switch the meter on, press the ON/OFF key.The batteries charge status or "LINE" message(if external power adapter is connected) will bedisplayed on the LCD for a few seconds.The meter is now ready to operate.To maximize battery life, the meter is automatically switched off after auser selectable period of non-use (default is 5 minutes). If in loggingmode, after the period of non-use, the meter will continue to monitorpH or mV (HI 98240 only) and temperature periodically at the end ofevery logging interval. Only the "LOG" indication will be visible onLCD. While storing data in memory, during the sleep mode, thereading will appear briefly on the LCD.Before proceeding with pH measurements follow the calibration proce-dure.Note: When the use of an alternate function (FNC, CFM and CAL) isrequested, press and hold the ALT key first and then thesecond listed key.Note: To prevent damage to the electrode, remove the pH electrodefrom the sample before turning the meter off.If the meter is OFF, detach the electrode from the meter beforeimmersing the electrode in the storage solution.ON/OFFSPECIFICATIONSRange -4.00 to 19.99 pH±400.0 mV / ±2000 mV autoranging (HI 98240 only)-10.0 to 120.0°C / 14.0 to 248.0°FResolution 0.01 pH0.1 mV (±400 mV) / 1 mV (outside) (HI 98240 only)0.1°C / 0.1°FAccuracy (@20°C/68°F) ±0.01 pH±0.5 mV (±400 mV) / ±2 mV (outside) (HI 98240 only)±0.5 °C (0 to 70°C) / ±1°C (outside)±1°F (32 to 158°F) / ±1.8°F (outside)Typical EMC Deviation ±0.03 pH±1 mV (±400 mV) / ±2 mV (outside) (HI 98240 only)±0.8°C / ±1.4°FpH Calibration Automatic, 1 or 2 point with 5 memorized buffer values(pH 4.01, 6.86, 7.01, 9.18 and 10.01)mV Calibration Automatic, 2 point at 0 and 350 mV or(HI 98240 only) 3 point at 0, 350 and 1900 mVTemperature CompensationAutomatic, -10 to 120°C (14 to 248°F)pH Electrode HI 1618D smart electrodewith built-in temperature, DIN connector and 1 m (3.3') cable (included)ORP Electrode Samrt ORP electrode with(HI 98240 only) DIN connector and 1 m (3.3') cable (optional)Input Impedance 1012 OhmPC Connection HI 9200 IR interfacePrinter Low power impact type-belt, 14 characters per line;38 mm plain paper (HI 710034)Printing/Logging IntervalSelectable at 1, 2, 5, 10, 15, 30, 60, 120 or 180 minutesPower supply 4 x 1.5V AA batteries / approx. 350 of use(without printing and backlight)or 12 Vdc inputEnvironment 0 to 50°C (32 to 122°F); RH max 95%Dimensions 220 x 87 x 75 mm (8.7 x 3.4 x 2.9")Weight 550 g (1.2 lb.)