Hanna Instruments HI 9811-5 Instruction Manual

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Hanna Instruments HI 9811-5 Instruction Manual Manual pdf 6 page image

6INITIAL 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 electrode protective cap before taking anymeasurements and make sure the meter has been calibrated beforetaking any measurements.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 storagesolution for 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 rinsethe probe with some of the next sample to be measured.TAKING EC/TDS MEASUREMENTS• Immerse the tip of the probe (4cm/1½")into the sample to be tested. If possible,use plastic beakers or containers to minimizeany EMC interference.• Tap the probe lightly on the bottom ofthe beaker to remove any air bubbleswhich may be trapped inside the tip.OPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDE