Hanna Instruments HI 9813-5 Instruction Manual

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Hanna Instruments HI 9813-5 Instruction Manual Manual pdf 7 page image

7INITIAL PREPARATIONEach meter is supplied complete with a 9V battery. Remove thebattery compartment cover on the back of the meter and install thebattery while observing its polarity.Connect the probe to the DIN socket on the top of the meter byaligning the pins with the socket and pushing in the plug.Always remove the probe protective cap before takingany measurements, and make sure the meter hasbeen calibrated.Turn the meter on by pressing the On/Off key.TAKING pH MEASUREMENTSIf the probe has been left dry, soak the tip in HI 70300 storage solutionfor 30 minutes to reactivate it.• To take a pH measurement simplysubmerge the tip (4cm/1½") of theprobe into the sample to be tested.• Select the pH mode.• Stir briefly and wait a couple ofminutes for the reading to adjustand stabilize. The display showsthe pH value.• If measurements are taken in different samples successively, it isrecommended to rinse (clean) the probe thoroughly to eliminatecross-contamination. After cleaning, it is recommended to rinse theprobe with some of the next sample to be measured.TAKING EC/TDS MEASUREMENTS• Immerse the tip of the probe (4cm/1½") into thesample to be tested. If possible, use plastic beakersor containers to minimize any EMC interference.• Tap the probe lightly on the bottom of the beakerto remove any air bubbles which may be trappedinside the tip.OPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDE