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Manual abstract: user guide HANNA INSTRUMENTS HI 83141
Detailed instructions for use are in the User's Guide.
[. . . ] 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. If service is required, contact the dealer from whom you purchased the instrument. [. . . ] Any variation introduced by the user to the supplied equipment may degrade the instruments' EMC performance. To avoid electrical shock, do not use these instruments when voltages at the measurement surface exceed 24Vac or 60Vdc. To avoid damage or burns, do not perform any measurement in microwave ovens.
Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice.
OPERATIONAL GUIDE
The meter is supplied complete with a 9V battery. Remove the battery compartment cover on the back of the meter, install the battery while paying attention to its polarity. Always remove the electrode protective cap before taking any measurements. If the electrode has been left dry, soak the tip in HI 70300 Storage Solution for half an hour to reactivate it. Connect the pH electrode and the temperature probe to the proper connectors on the top of the instrument. Turn the meter ON by pressing the ON/OFF key.
CALIBRATION
The ORP (mV) and temperature ranges are factory calibrated. Contact the nearest Hanna Service Center for recalibration, if needed. For greatest accuracy, frequent pH calibration of the instrument is recommended. The instrument should be recalibrated for pH: a) Whenever the pH electrode is replaced. · Rinse and immerse the pH electrode in pH4. 01 or pH10. 01 buffer (2nd calibration point) and stir gently. · Wait a couple of minutes and adjust the SLOPE trimmer on the lower right of the front panel until the LCD shows the pH value at the noted temperature.
pH
BATTERY REPLACEMENT
When the battery becomes weak, the meter displays a blinking additional decimal point on the left side of the LCD. When the low battery indicator appears only a few hours of battery life is remaining. A low battery level may also result in unreliable measurements. It is recommended to replace the battery immediately. Replacement must only take place in a non-hazardous area using an alkaline 9V battery.
To take pH measurements simply submerge the pH electrode (at least 4cm/1½") and the temperature probe (as close as possible to the electrode) into the sample to be tested. The temperature probe can be used independently to take temperature measurements, or it can be used in conjunction with the pH electrode to utilize the meter's ATC capability. [. . . ] If a calibration with NBS standards is needed, use pH6. 86 (HI 7006) instead of pH7. 01 and pH9. 18 (HI 7009) instead of pH10. 01.
The pH calibration is now complete.
Unscrew the 3 screws on the back of the meter, remove the battery cover and replace the battery while paying attention to its polarity.
Procedure
· Connect pH electrode and temperature probe to the meter and switch it ON. · Remove the protective cap, rinse the tips of pH electrode and temperature probe with some pH7. 01 solution. Immerse them into a pH7. 01 buffer solution, stir gently and wait a couple of minutes for stable reading. [. . . ]
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