Hanna Instruments HI2209 Instruction Manual

Also see for HI 2209: Instruction manual Instruction manual

8pH CALIBRATION• Connect the ORP electrode to the meter andsubmerge the tip (4 cm / 1½") into the sampleto be tested.Note: ORP measurements are taken withouttemperature compensation.• Press the mV key to enter the mV mode. Allowa few minutes for the reading to stabilize.• The display will indicate the mV value (positiveor negative).AFTER MEASUREMENTS• Press the ON/OFF switch to switch the instrument off.IMPORTANTThe instrument's pH range should be re-calibrated:• When the meter is new.• Whenever the pH electrode is replaced.• At least once a month.• After use in aggressive chemicals.• After cleaning procedure and changing the reference electrolyte.• For greatest accuracy.PREPARATIONPour small quantities (up to 4 cm / 1½" level)of pH7.01 (HI7007) and pH4.01 (HI7004) orpH10.01 (HI7010) solution into clean beakers(50 or 100 mL bottles). If possible use plasticbeakers to minimize any EMC interferences.TAKING ORP MEASUREMENTSHI2209 and HI22091 have the capability to take ORP measurements,using an ORP electrode. Hanna Instruments offers a variety of ORPelectrodes for this purpose (see accessories). Contact your local HannaInstruments Office for more information.