Hanna Instruments HI 93124 User Manual
Instruction Manual
HI 93124
Portable Logging
Haze Meter
www.hannainst.com
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Dear Customer,
Thank you for choosing a Hanna product.
Please read this instruction manual carefully before using the meter.
This manual will provide all necessary information for a correct use.
If you need additional technical information, do not hesitate to e-mail us at
tech@hannainst.com or contact your nearest technical office.
This instrument is in compliance with the directives.
TABLE OF CONTENTS
Warranty................................................................................... 3
Preliminary Examination ............................................................. 3
Principle of Operation ................................................................. 4
General Description ..................................................................... 4
Functional Description ................................................................. 5
Specifications ............................................................................. 6
Operational Guide ..................................................................... 7
Taking measurements ......................................................... 7
Sources of interference ......................................................... 8
Log-on-demand .................................................................. 8
Cleaning logged data ......................................................... 8
Viewing logged data .......................................................... 9
Viewing and setting date and time ..................................... 9
RS232 connection ...................................................................... 9
Calibration .............................................................................. 10
Calibration procedure ........................................................ 10
Viewing calibration date ................................................... 11
Standard suspension ........................................................ 11
Tips for accurate operation........................................................ 12
LCD error codes ........................................................................ 13
Battery Replacement ................................................................ 14
Accessories ............................................................................... 14
CE declaration of conformity ...................................................... 15
WARRANTY
All Hanna Instruments meters are warranted for two years against defects in
workmanship and materials when used for their intended purpose and maintained
according to instructions.
This warranty is limited to repair or replacement free of charge. Damage due to
accidents, misuse, tampering or lack of prescribed maintenance are 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 Customer
Service department and then send it with shipping costs prepaid. When shipping
any instrument, make sure it is properly packaged for complete protection.
PRELIMINARY EXAMINATION
Remove the instrument from the packing material and examine it to make sure that
no damage has occurred during shipping. If there is any damage, notify your Dealer.
HI 93124 is supplied complete with:
• Glass Cuvet & Cap (2 pcs.)
• 1.5V AA alkaline batteries (4 pcs.)
• Instruction manual
• Rugged carrying case
Note: Save all packing material until you are sure that the meter functions
correctly. All defective items must be returned in its original packaging
with the supplied accessories.
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PRINCIPLE OF OPERATION
HI 93124 has been designed to perform turbidity measurements according to the
EBC (European Brewery Convention) Standard.
The instrument functions by passing a beam of infrared light through a cuvette
containing the sample being measured. The light source is a High Emission Infrared
LED with a wavelength peaking at 890 nm, ensuring that the interference caused
by colored samples is minimum.
A sensor, positioned at 90° with respect to the direction of light, detects the amount
of light scattered by the undissolved particles present in the sample.
The microprocessor converts such readings into EBC values.
GENERAL DESCRIPTION
FUNCTIONAL DESCRIPTION
Beer clarity is a parameter constantly controlled in brewery, and to assure a consistent
product quality, the brewmaster needs more than visual inspection.
Several substances can cause haze in beer, but the most frequently encountered
problem is due to a cross-linking of polyphenol and protein. These materials probably
exist in equilibrium in beer and manifest themselves as a haze when the polyphenol
polymerizes.
A range of stabilization treatments is available for avoiding haze problems, and
the product has to be controlled on several steps during brewing process, in particular
after filtration and before the beer enters the single tanks.
HI 93124 is a portable Haze meter, especially designed for application in brewery.
The instrument is also provided with a log-on-demand feature, which allows the
user to store up to 199 samples into the internal memory.
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1) RS232 connector
2) Measurement cell
3) Liquid Crystal Display
4) ON/OFF key, to switch the meter ON and OFF; CLR key, to clear log memory
(with ALT)
5) GLP key, to display last calibration date and time; CAL key, to enter calibration
mode (with ALT)
6) ALT key, to activate alternate functions
7) READ key, to perform measurements; DATE key, to display (toggle) current date
and time (with ALT)
8) STO key, to store sample after reading; VIEW key, to view log memory (with ALT)
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