HI98118
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Two-point calibration Proceed with steps 1 through 3 under single-point calibration using pH 7.01 buffer first. Then follow steps below: • The “pH 4.01 USE“ message is then displayed. • Place the electrode in the second calibration buffer (pH 4.01 or 10.01). When the second buffer is accepted, the LCD will display “Stor” for 1 second and the meter will return to the normal measurement mode. • The “CAL“ tag will be displayed in measurement mode with the calibrated buffers. • If the buffer is not recognized or the slope is out of accepted range “---- Err“ is displayed. Change the buffer, clean the electrode or press any key to exit calibration. It is always recommended to carry out a two-point calibration for better accuracy. Clear calibration Press CAL button. Meter enters in calibration mode. Press ON/OFF button and CLR is displayed. The meter will now be at default calibration. The “CAL“ tag will be cleared in measurement mode, indicating the missing calibration, until a new calibration will be performed. Error messages • During user calibration, if the reading is out of the accepted range, the meter will displayed “---- Err“. • pH 14.00 or 0.00 blinking means the limit of the measured value is out of range. Verify that the electrode is in solution. • If the measured temperature is higher than 50.0 ºC or lower than 0.0 ºC, the 50.0 ºC or 0.0 °C message is displayed blinking. • If the buffer is not recognised “----Err“ is displayed. Check the buffer, clean the electrode or press CAL button to exit calibration. • In case of erroneous readings even after an accurate conditioning and calibration, the reference junction might be contaminated or clogged. Pull out 2 mm (1/8’’) of the cloth junction to renew the electrode reference (it is recommended to cut the cloth leaving always at least 2 mm - (1/8’’) over the reference compartment) and recalibrate the meter. The cloth junction can be pulled out approximately 20 times. After that, the electrode will have to be replaced. Quick Calibration Solution Code HI5036-023 Quick Cal pH and EC one-point calibration solution, 230 mL bottle Quick Cal pH and EC one-point calibration solution, 20 mL sachets (25 pcs.) pH Buffer Solution • If the electrode or junction is dirty soak the tip in HI7061 cleaning solution for 30 minutes, rinse thoroughly in distilled water and then follow cleaning procedure. • Removal of films, dirt or deposits on the membrane/junction: • General Soak in Hanna HI7061 General Cleaning Solution for approximately 1 hour. • Protein Soak in Hanna HI7073 Protein Cleaning Solution for 15 minutes. • Inorganic • Oil and grease Soak in Hanna HI7074 Inorganic Cleaning Solution for 15 minutes. Rinse with Hanna HI7077 Oil and grease Cleaning Solution IMPORTANT: After performing any of the cleaning procedures rinse the electrode thoroughly with distilled water, and soak the electrode in HI70300 Storage Solution for at least 1 hour before taking measurements. Battery Replacement pH 4.01 buffer solution, 20 mL sachets (25 pcs.) pH 7.01 buffer solution, 20 mL sachets (25 pcs.) pH 10.01 buffer solution, 20 mL sachets (25 pcs.) pH 4.01 & 7.01 buffer solution, 20 mL sachets (10 pcs., 5 ea.) pH 10.01 & 7.01 buffer solution, 20 mL sachets (10 pcs., 5 ea.) Electrode Cleaning Solution Code General purpose cleaning solution, 230 mL bottle Electrode Storage Solution Code Electrode storage solution, 230 mL bottle Warranty The meter features a low battery indicator. When the battery is running low (under 10%), the battery indicator will blink on the LCD. When the battery is discharged “dEAd bAtt” will be displayed on the LCD for 2 seconds and the meter will turn off. To change the CR2032 Li-ion battery, turn the battery cover located on the back of the meter counterclockwise to unlock. Remove cover and replace with new battery + side facing up. ^ Note: Batteries should only be replaced in a safe area using the battery type specified in this instruction manual. Old batteries should be disposed in accordance with local regulations. INSTRUCTION MANUAL Care and Maintenance To obtain the highest accuracy for measurements it is important to follow these tips: • Calibration is only as good as the buffers being used. The pH buffers value change over time once the sachets are opened. Fresh buffer should be used for each calibration. • The electrode should be rinsed with purified water each time before placing in buffer or sample to be tested. • When the meter is not in use it is important to add several drops of storage solution to a sponge in the protective cap to keep the electrode hydrated. If storage solution is not available, then pH 4.01 or pH 7.01 buffer can be used. • For improved accuracy it is recommended to calibrate in two buffers. It is important to use buffers that bracket the expected value of the sample to be tested. For example, if the expected value is pH 8, the meter should be calibrated using pH 7.01 and pH 10.01 buffers. This meter is warranted for a period of 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. Damage due to accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact your local Hanna Instruments Office. If under warranty, report the model number, date of purchase, serial number and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization (RGA) number from the Technical Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly p