32PRELIMINARY EXAMINATIONRemove the instrument from the packing material and examine itcarefully to make sure that no damage has occurred during shipment.If noticeable damage is found, notify your Dealer.Each meter is supplied with:• Combination probe with 8-pin DIN connector & 1 m (3.3') cable:• HI 1285-0, pH/EC/TDS probe, for HI 9811-0• HI 1285-5, pH/EC/TDS/°C probe, for HI 9811-5• HI 70007, pH 7.01 sachet, 1 pc• HI 70031, 1413 μS/cm sachet, 1 pc• HI 70032, 1382 ppm (mg/L) sachet, 1 pc• HI 700661 cleaning solution sachet, 2 pcs• Instruction manual• 1 x 9V alkaline battery.Note: Save all packing material until you are sure that theinstrument functions correctly. Any defective item must bereturned in the original packing together with the suppliedaccessories.GENERAL DESCRIPTIONHI 9811-0 and HI 9811-5 are the complete, versatile and rain-proofportable combined meters designed with utmost precision and simplic-ity. Both models provide measurements for pH, EC and TDS ranges,which are easily selectable through a membrane keyboard on thefront panel.Conductivity measurements are automatically compensated for tem-perature changes with a built-in temperature sensor. The temperaturecoefficient is fixed at 2%/°C.• HI 9811-0 is a pH/EC/TDS meter designed for simplicity of use intaking pH, μS/cm and mg/L measurements. Suited for hydro-ponics, greenhouses, farming and ground water applications.• HI 9811-5 offers all the features of HI 9811-0 with the additionof temperature measurement in the °C scale.Dear Customer,Thank you for choosing a Hanna product.Please read this instruction manual carefully before using the meter.This manual will provide you with the necessary information forcorrect use of the instrument, as well as a precise idea of its versatility.If you need additional technical information, do not hesitate to e-mailus at tech@hannainst.com.These instruments are in compliance with the directives.TABLE OF CONTENTSPRELIMINARY EXAMINATION ........................................................ 3GENERAL DESCRIPTION ................................................................ 3FUNCTIONAL DESCRIPTION .......................................................... 4SPECIFICATIONS........................................................................... 5OPERATIONAL GUIDE ................................................................... 6pH CALIBRATION ......................................................................... 8pH VALUES AT VARIOUS TEMPERATURES ..................................... 9EC/TDS CALIBRATION ................................................................. 10EC/TDS CONVERSION FACTOR..................................................... 10BATTERY REPLACEMENT .............................................................. 11PROBE MAINTENANCE ................................................................ 12ACCESSORIES ............................................................................. 13CE DECLARATION OF CONFORMITY .............................................. 14All Hanna Instruments meters are warranted for two years against defects inworkmanship and materials when used for their intended purpose and maintainedaccording to instructions. Probes are warranted for a period of six months.This warranty is limited to repair or replacement free of charge.Damages due to accidents, misuse, tampering or lack of prescribed maintenance arenot covered.If service is required, contact the dealer from whom you purchased the instrument. Ifunder warranty, report the model number, date of purchase, serial number and thenature of the failure. If the repair is not covered by the warranty, you will be notified ofthe charges incurred. If the instrument is to be returned to Hanna Instruments, firstobtain a Returned Goods Authorization number from the Customer Service departmentand then send it with shipping costs prepaid. When shipping any instrument, makesure it is properly packaged for complete protection.WARRANTY