Hanna Instruments HI 255 Instruction Manual

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2TABLE OF CONTENTSWARRANTY ................................................................................................................... 2PRELIMINARY EXAMINATION ........................................................................................... 3GENERAL DESCRIPTION .................................................................................................... 3FUNCTIONAL DESCRIPTION ............................................................................................. 4HI 255 SPECIFICATIONS .................................................................................................. 5OPERATIONAL GUIDE ....................................................................................................... 7AUTORANGING ................................................................................................................ 11pH CALIBRATION ................................................................................................................ 12RELATIVE mV CALIBRATION .......................................................................................... 15ECS/TDS CALIBRATION ................................................................................................... 16NaCl CALIBRATION .......................................................................................................18GOOD LABORATORY PRACTICE (GLP) .....................................................................................19LOGGING FUNCTION .......................................................................................................25SETUP .................................................................................................................................31TEMPERATURE CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) .................................36mV CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) .............................................. 38PC INTERFACE ............................................................................................................... 39pH VALUES AT DIFFERENT TEMPERATURES .................................................................... 41CONDUCTIVITY VERSUS TEMPERATURE CHART ................................................................ 42ELECTRODE CONDITIONING & MAINTENANCE ................................................................. 43TROUBLESHOOTING GUIDE ........................................................................................... 46TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS .............................................47ACCESSORIES .................................................................................................................... 48WARRANTYHI 255 is guaranteed for two years against defects in workmanship andmaterials when used for its intended purpose and maintained according toinstructions. Electrodes and probes are guaranteed for six months. Thiswarranty is limited to repair or replacement free of charge.Damage due to accidents, misuse, tampering or lack of prescribed maintenanceis not covered.If service is required, contact the dealer from whom you purchased theinstrument. If under warranty, report the model number, date of purchase,serial number and the nature of the problem. If the repair is not covered bythe warranty, you will be notified of the charges incurred. If the instrument isto be returned to Hanna Instruments, first obtain a Returned Goods Authori-zation number from the Technical Service department and then send it withshipping costs prepaid. When shipping any instrument, make sure it isproperly packed for complete protection.Dear Customer,Thank you for choosing a Hanna Instruments product.Please read this instruction manual carefully before using the instrument.This manual will provide you with the necessary information for correct use ofthe instrument, as well as a precise idea of its versatility.If you need additional technical information, do not hesitate to e-mail us attech@hannainst.com or turn to the back cover for our worldwide contact list.