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PRELIMINARY EXAMINATION
The HI 3512 instrument is state-of-the-art, professional bench meter
with graphical LCD, designed to provide laboratory results and accuracy.
Two input channels are available.
• Channel 1: pH/mV/ISE and temperature
• Channel 2: EC/TDS, NaCl/Resistivity and temperature
HI 3512 is provided with a series of new diagnostic features which add
an entirely new dimension to the measurement of pH and EC, by allowing
the user to dramatically improve the reliability of the measurement:
pH channel:
• 7 standard pH buffers (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01
and 12.45) for calibration.
• pH calibration up to five calibration points (see instrument specifications).
• Custom calibration with up to two custom buffers.
• Messages on the graphic LCD for an easy and accurate calibration.
• Diagnostic features to alert the user when the electrode needs cleaning.
• User selectable “Out of cal. range“ warning.
• User selectable “Calibration Timeout“ to remind when a new
calibration is necessary.
Remove the instrument from the packing material and examine it carefully
to make sure that no damage has occurred during shipping. If there is any
damage, notify your Dealer or the nearest Hanna Customer Service Center.
Each instrument is supplied with:
• HI 1131B Glass body combination double-junction pH electrode
• HI 76310 Four Ring Conductivity Probe with built-in temperature
• HI 7662-T stainless steel Temperature Probe with 1 m (3.3') Cable
• HI 70004 pH 4.01 Buffer Solution (20 mL sachet)
• HI 70007 pH 7.01 Buffer Solution (20 mL sachet)
• HI 700661 Cleaning solution (2x20 mL each)
• HI 7082S Electrolyte Solution
• HI 76404N Electrode Holder
• 12 Vdc Power Adaptor
• Instruction Manual
HI 3512-01 is supplied with 12 Vdc/115 Vac power adapter
HI 3512-02 is supplied with 12 Vdc/230 Vac power adapter
Note: Save all packing material until you are sure that the instrument
functions correctly. All defective items must be returned in the
original packing with the accessories supplied.
Dear Customer,
Thank you for choosing a Hanna Instruments product.
Please read this instruction manual carefully before using this instrument.
This manual will provide you with the necessary information for correct use
of this instrument, as well as a precise idea of their versatility.
If you need additional technical information, do not hesitate to e-mail us
at tech@hannainst.com or view our worldwide contact list at
www.hannainst.com.
The HI 3512 is guaranteed for two years against defects in workmanship
and materials when used for their 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 Authorization 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.
WARRANTY
TABLE OF CONTENTS
GENERAL DESCRIPTION
WARRANTY ............................................................................................. 2
PRELIMINARY EXAMINATION ...................................................................... 3
GENERAL DESCRIPTION ............................................................................ 3
FUNCTIONAL DESCRIPTION ........................................................................ 5
SPECIFICATIONS ....................................................................................... 7
OPERATIONAL GUIDE .............................................................................. 10
AUTO-RANGING EC CHANNEL ................................................................... 15
TEMPERATURE COMPENSATION EC CHANNEL ............................................. 16
CONDUCTIVITY VERSUS TEMPERATURE CHART ......................................... 17
USER CALIBRATION ................................................................................ 18
pH CALIBRATION .................................................................................... 19
pH BUFFER TEMPERATURE DEPENDENCE ................................................. 27
RELATIVE mV CALIBRATION .................................................................... 28
ISE CALIBRATION ................................................................................... 29
EC CALIBRATION .................................................................................... 33
GOOD LABORATORY PRACTICE (GLP) ........................................................ 37
SETUP .................................................................................................. 40
LOGGING .............................................................................................. 55
mV CALIBRATION (for technical personnel only) .......................................... 58
TEMPERATURE CALIBRATION (for technical personnel only) .......................... 59
PC INTERFACE ....................................................................................... 61
TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ............................. 71
ELECTRODE CONDITIONING AND MAINTENANCE ......................................... 72
EC PROBE MAINTENANCE ........................................................................ 75
TROUBLESHOOTING GUIDE ..................................................................... 76
ACCESSORIES ........................................................................................ 77
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