Extech RF12 Bedienungsanleitung
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RF12-en-US_V1.2 3/15
User's Guide
0 to 18% Brix Refractometer with ATC
Model RF12
Introduction
Congratulations on your purchase of the Extech RF12 Brix Refractometer.
Precision optical instruments should be handled gently; avoid touching the
optical surface. Careful use of these instruments will provide years of
reliable service.
Specifications
Range 0 to 18% Brix
Resolution 0.1%
ATC range 50 to 86ºF / 10 to 30ºC
Dimensions 6.7 x 1.6 x 1.2" (170 x 40 x 30mm);
Weight 5.5 oz. (155g)
Description
1. Eyepiece
2. Mirror Tube
3. Adjustment screw
4. Cover Plate
5. Prism
Scale
Operation
This instrument measures the refractive index of a sample and displays the
results in % Brix.
1. Zero Adjustment
Cover the prism with a few drops of distilled water from the included vial.
Close the cover plate and view the light/dark boundary (shadowline). If
necessary, turn the adjustment screw until the shadowline aligns with the
scale’s zero line. The zero calibration should be performed at 68ºF/20ºC.
After the zero adjustment, clean the prism with a soft cloth.
2. Sample Preparation and Reading
To take a sample reading, open the cover plate and place a few drops of
the sample on the measurement prism. Close the cover plate so that the
liquid spreads across the entire surface of the prism without air bubbles or
dry spots. Allow the sample to
remain on the prism for
approximately 30 seconds.
While holding the instrument under
a light source, look through the
eyepiece. The brix concentration is
determined by the intersection of
the boundary of the light and dark
fields on the scale. . If the scale
appears out of focus, adjust by
rotating the eyepiece until the scale
is in focus.The instrument also features an eye-guard to prevent stray light
from entering the eyepiece and causing reflections.
It may be necessary to adjust the position of the light source to maximize
the contrast of the shadowline. Under normal conditions, optimal contrast
is obtained by holding the instrument underneath and perpendicular to a
light source.
Once a reading has been taken, wipe dry with a clean cloth (do not wash
or rinse) and place the instrument in the supplied plastic case. Store the
instrument in a safe, dry environment.
3. Automatic Temperature Compensation (ATC)
Temperature is one of the single most important factors influencing
accurate refractometer readings and is one of the largest sources of
measurement error. Automatic temperature compensation relieves the
user of the responsibility to measure temperature and apply a correction
factor when taking readings. The RF12 makes this correction
automatically. Using 68°F (20°C) as a reference, readings are
automatically adjusted to compensate for temperature variance between
50°F to 86°F (10°C to 30°C).
International Brix% Scale
Brix to Refractive Index (nD) Conversion Table
% nD % nD % nD % nD
0 1.333 5 1.3403 10 1.3478 15 1.3557
1 1.3344 6 1.3418 11 1.3494 16 1.3573
2 1.3359 7 1.3433 12 1.3509 17 1.3589
3 1.3373 8 1.3448 13 1.3525 18 1.3605
4 1.3388 9 1.3463 14 1.3541
Source: International Sugar Analysis Committee
Warranty
FLIRSystems,Inc.warrantsthisExtechInstrumentsbranddevice to befreeof
defectsinparts and workmanshipfor oneyear from date of shipment(asixmonth
limitedwarrantyappliestosensorsandcables).Ifitshouldbecomenecessaryto
returntheinstrumentforserviceduringorbeyondthewarranty
period, contact
the theCustomerServiceDepartment authorization.for Visit website
www.extech.comforcontact information. A ReturnAuthorization(RA)number
mustbeissuedbeforeanyproductisreturned.Thesenderisresponsiblefor
shippingcharges,freight,insuranceandproperpackagingtopreventdamagein
transit.This applywarrantydoesnot
todefects fromresulting actionoftheuser
suchasmisuse, improper wiring, operation outside of specification,improper
maintenanceor orrepair, unauthorizedmodification.FLIRSystems,Inc.specifically
disclaimsanyimpliedwarranties merchantabilityor orfitnessfor a specific
purposeand bewillnot liableforanydirect,indirect,incidentalor
consequential
damages.FLIR’s liabilitytotal islimitedtorepair or of replacement theproduct.
Thewarrantysetforthaboveisinclusiveandnootherwarranty,whether written
or ororal,isexpressed implied.
Calibration, CustomerRepair,and CareServices
FLIRSystems,Inc.offersrepairandcalibrationservices for the
ExtechInstrumentsproductswesell.NISTcertificationformost
productsisalsoprovided.CalltheCustomerService
Departmentfor forinformationoncalibrationservicesavailable
thisproduct.Annual becalibrationsshould performedtoverify
meterperformanceand andaccuracy. Technical support
generalcustomerservice theisalsoprovided,referto contact
informationprovidedbelow.
Copyright ©2013 2015‐ FLIRSystems,Inc.
Allrightsreservedincludingtherightof orreproductioninwhole in inpart any
form
www.extech.com
X X
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Support 439 8324;Lines:U.S.(877) ‐ International:+1 ‐ (603) 324 7800
TechnicalSupport:Option3; ‐E mail:support@extech.com
Repair & Returns:Option4; ‐E mail:repair@extech.com
Productspecificationsaresubjecttochangewithoutnotice
Pleasevisitourwebsiteforthe datemostup‐to‐ information
www.extech.com
FLIRCommercialSystems,Inc., 9 TownsendWest,Nashua,NH03063 USA
ISO9001Certified
Produktspezifikationen
| Marke: | Extech |
| Kategorie: | Messung |
| Modell: | RF12 |
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