Hanna Instruments HI 255 - Manual (Page 2)

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TABLE OF CONTENTS
WARRANTY ................................................................................................................... 2
PRELIMINARY EXAMINATION ........................................................................................... 3
GENERAL DESCRIPTION .................................................................................................... 3
FUNCTIONAL DESCRIPTION ............................................................................................. 4
HI 255 SPECIFICATIONS .................................................................................................. 5
OPERATIONAL GUIDE ....................................................................................................... 7
AUTORANGING ................................................................................................................ 11
pH CALIBRATION ................................................................................................................ 12
RELATIVE mV CALIBRATION .......................................................................................... 15
ECS/TDS CALIBRATION ................................................................................................... 16
NaCl CALIBRATION .......................................................................................................18
GOOD LABORATORY PRACTICE (GLP) .....................................................................................19
LOGGING FUNCTION .......................................................................................................25
SETUP .................................................................................................................................31
TEMPERATURE CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) .................................36
mV CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) .............................................. 38
PC INTERFACE ............................................................................................................... 39
pH VALUES AT DIFFERENT TEMPERATURES .................................................................... 41
CONDUCTIVITY VERSUS TEMPERATURE CHART ................................................................ 42
ELECTRODE CONDITIONING & MAINTENANCE ................................................................. 43
TROUBLESHOOTING GUIDE ........................................................................................... 46
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS .............................................47
ACCESSORIES .................................................................................................................... 48
WARRANTY
HI 255 is guaranteed for two years against defects in workmanship and
materials when used for its intended purpose and maintained according to
instructions. Electrodes and probes are guaranteed for six months. This
warranty is limited to repair or replacement free of charge.
Damage due to accidents, misuse, tampering or lack of prescribed maintenance
is not covered.
If service is required, contact the dealer from whom you purchased the
instrument. If under warranty, report the model number, date of purchase,
serial number and the nature of the problem. If the repair is not covered by
the warranty, you will be notified of the charges incurred. If the instrument is
to be returned to Hanna Instruments, first obtain a Returned Goods Authori-
zation number from the Technical Service department and then send it with
shipping costs prepaid. When shipping any instrument, make sure it is
properly 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 of
the instrument, as well as a precise idea of its versatility.
If you need additional technical information, do not hesitate to e-mail us at
[email protected] or turn to the back cover for our worldwide contact list.