Hanna Instruments C 125 User Manual
Instruction Manual
C 125
Portable Limpidity Meter
for Rosè & White Wine
www.hannainst.com
1
2
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 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.
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.
TABLE OF CONTENTS
Preliminary examination .............................................................. 4
Principle of operation ................................................................... 4
General description ...................................................................... 5
Functional description .................................................................. 6
Specifications ................................................................................7
Operational guide .......................................................................8
Calibration................................................................................. 10
Tips for accurate operation ......................................................... 12
Battery replacement ..................................................................13
Accessories .................................................................................. 14
CE Declaration of Conformity ....................................................... 15
3
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.
C125 is supplied complete with:
• Glass Cuvette & Cap (2 pcs.)
• Calibration solutions HI93703-0, HI93703-10 and HI93703-5
• Tissue for wiping cuvettes (HI731318)
• 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.
PRINCIPLE OF OPERATION
C125 has been designed to perform measurements according to the ISO 7027
International Standard.
The instrument functions by passing a beam of infrared light through a vial
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 FTU (=FNU) values.
4
GENERAL DESCRIPTION
C125 is a portable, microprocessor-based limpidity meter, especially designed for
application in wine making process for white and rosè wines.
Wine limpidity, like all other liquids, is determined by suspended small particles that
deviate the light beams.
During wine making process, the wine turbidity can be caused by several
phenomena, which can reduce the limpidity degree and render the product not
appreciable for the consumer.
A reduced wine limpidity often goes together with unpleasant fragrance and flavor.
The most common causes of wine turbidity are:
• salts (salts of tartaric acid, calcium, iron and copper)
• enzymes
• colloids (proteins, polyphenols)
• biological factors
For preventing turbidity, the wine can be treated with particular additives which
act as wine limpidity stabilizers for long time.
During wine production the limpidity is measured on three critical steps:
1. Alcoholic fermentation: expected value is below 600 FTU
2. Malolactic fermentation: expected value is below 100 FTU
3. Filtration: expected value is within the 0.3 to 0.5 FTU range
Normally the limpidity value for bottled wine should not be greater than 4.00 FTU.
The below table gives a correspondence between limpidity values and product
appearance:
Limpidity value (FTU) Appearance
0.10 to 0.50 Very limpid
0.50 to 1.00 Limpid
1.00 to 1.80 Slightly blurred
1.80 to 3.00 Blurred
3.00 to 4.00 Opalescent
> 4.00 Cloudy
5
Loading...