Hanna Instruments HI847492 User Manual

Instruction Manual

HI 847492

Portable Haze Meter

ASBC compliant

www.hannainst.com

Dear Customer, Thank you for choosing a Hanna Instruments product. This manual will provide you with the

necessary information for correct use of the instrument. Please read this instruction manual carefully before using the instrument. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com

or see the back side of this manual for our worldwide sales and technical service contacts. This instrument is in compliance with directives.

TABLE OF CONTENTS

WARRANTY .......................................................................................................................... 3

PRELIMINARY EXAMINATION ................................................................................................. 3

GENERAL DESCRIPTION ......................................................................................................... 4

ABBREVIATIONS .................................................................................................................. 5

PRINCIPLE OF OPERATION .................................................................................................... 6

MEASUREMENT UNITS.......................................................................................................... 6

SPECIFICATIONS................................................................................................................... 7

FUNCTIONAL DESCRIPTION ................................................................................................... 8

GENERAL TIPS FOR AN ACCURATE MEASUREMENT................................................................. 10

CALIBRATION PROCEDURE .................................................................................................. 11

HAZE MEASUREMENT ......................................................................................................... 14

LOGGING ........................................................................................................................... 16

GOOD LABORATORY PRACTICE (GLP) .................................................................................... 19

SETUP ............................................................................................................................... 20

LCD BACKLIGHT .................................................................................................................. 24

TAG INSTALLATION ............................................................................................................. 24

BATTERY MANAGEMENT ...................................................................................................... 25

ERROR CODES.................................................................................................................... 26

PC INTERFACE .................................................................................................................... 26

ACCESSORIES .................................................................................................................... 27

WARRANTY

HI 847492 is warranted for two years against defects in workmanship and materials when used for its 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 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 failure. 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.

To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase.

PRELIMINARY EXAMINATION

Please examine this product carefully. Make sure the instrument is not damaged. If any damage has occurred during the shipment, please notify your dealer.

This HI 847492 Portable Haze Meter is supplied complete with:

• One HI 98501-1 Checktemp thermometer

• Checktemp instruction manual

• Five Sample Cuvets and Caps

• Four Calibration Cuvets (HI 847492-11)

• Five Tag Holders with Tags (HI 920005)

• Cloth for wiping the cuvets

• Silicon oil

• Four 1.5V AA Batteries

• AC Adapter

• Instruction Manual

• Instrument Quality Certificate

• Rigid carrying case

Note:Save all packing material until you are sure that the instrument works correctly. Any

defective item must be returned in the original packing with the supplied accessories.

GENERAL DESCRIPTION

The HI 847492 is an auto diagnostic microprocessor meter that benefits from Hanna’s years of experience as manufacturer of analytical instruments. The HI 847492 is a ASBC (American Society of Brewing Chemists) compliant haze meter that is part of the new HI 84749x series, especially designed for haze measurements. The other models included are: HI 847491 ISO compliant haze meter and HI 847493 MEBAK compliant haze meter. The optical system, consisting of a 580 nm LED and multiple detectors, assures low power consumption, long term stability and minimizes the need of frequent calibration. Calibration can be easily performed at any time in two, three or four adjustable points (<0.1, 15, 100 and 800 FTU), using the supplied or user prepared standards. The meter has all necessary GLP (Good Laboratory Practice) functions to allow maximum traceability of data like a real time clock, log-on-demand (up to 200 measurements), and T.I.S. -Tag Identification System to give all recorded data a location, time and date stamp.

The meter measures haze of samples from 0.00 to 1000 FTU (Formazin Turbidity Units) . It has a continuous measurement mode to verify the settling rate of suspended matter, and a signal average (AVG) mode to accumulate multiple readings giving a final average value. The AVG setting is particularly useful to measure samples with suspended particles with different dimensions. The HI 847492 has a user-friendly interface, with a large backlit LCD (Liquid Crystal Display). Acoustic signals and displayed codes to guide the user step by step through routine operations. This splash proof portable haze meter is supplied in a rigid carrying case that offers protection for harsh environments.

GENERAL DESCRIPTION

Haze

Beer haze may be defined as an insoluble or semisoluble particulate matter which is small enough to form a colloidal suspension in beer, (typically <2mm). These particles scatter transmitted light and are observed as a degradation in the brilliance of the beer.

Beer clarity is a parameter constantly controlled in the brewery, and to assure 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 exist in equilibrium in beer and manifest themselves as a haze when polyphenols combine with proteins to form an insoluble colloidal haze.

A range of stabilization treatments is available for avoiding haze problems, and the product has to be controlled in several steps during the brewing process, in particular after filtration and before the beer enters the bright tanks.

TAG IDENTIFICATION SYSTEM

Hanna is the first manufacturer of turbidity instruments that has added the unique T.I.S. - Tag Identification System to portable turbidity meters, to meet the more restrictive needs for traceability and data management of our clients.

The system is designed for scientific and industrial applications, as well as for safety audits and inspections to show that measurements have been taken on pre-established locations.

The system is as easy to install as to operate. Just fix the iButton® tags near your sampling sites that need to be checked often, and with this the T.I.S. is setup. The tag contains a computer chip embedded in durable stainless steel. It is designed to withstand the harsh environments, indoors or outdoors. The number of tags that can be installed is practically unlimited, because each tag has a unique identification code.

Immediately after installation of the tags you can start collecting data. Use the meter to take measurements and memorize the test result by pressing the Log-on-Demand key. Then, the instrument will ask for the tag identification. By simply touching the iButton® with the matching connector on the meter it will identify and authenticate logging, by storing the iButton® serial number, time and date stamp events.

The power of the T.I.S. features resides in the PC application. Download all test data to your PC and use our HI 92000 Windows® compatible application software for further data management. You can sort or filter all your collected data on different criteria (specific sampling location, parameter, date and time intervals) or fix range to filter measured values. The data can be plotted in a graph, exported to other common Windows® applications or printed for reporting purpose.

It is also possible to add new tags later on, thus increasing an already existing database. Each time the PC software recognizes an unregistered tag, it will ask for a description of the new sampling location.

ABBREVIATIONS

NTU Nephelometric Turbidity Units FTU Formazin Turbidity Units ASBC American Society of Brewing Chemists EBC European Brewery Convention LCD Liquid Crystal Display

RTC Real Time Clock TIS Tag Identification System

®®

iButton

is registered Trademark of “MAXIM/DALLAS semiconductor Corp.”

®®

Windows

is registered Trademark of “MICROSOFT Corporation”

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PRINCIPLE OF OPERATION

A light beam obtained from a High Emission 580 nm LED that passes through the sample is scattered in all directions. The intensity and pattern of the scattered light is affected by many variables like wavelength of the incident light, particle size, shape, refractive index and color. The light source LED with a wavelength peaking at 580 nm ensuring that the interference caused by colored samples is minimum. The optical system includes LED, a scattered light detector (900) and a transmitted light detector (1800). The microprocessor of the instrument calculates the FTU value from the signals that reaches the two detectors.

The lower detection limit of a haze meter is determined by the so called “stray light”. Stray light is the light detected by the sensors, that is not caused by light scattering from suspended particles. The optical system of HI 847492 haze meter is designed to have very low stray light, providing accurate results also for low haze samples. However, special care must be taken when measuring low haze samples (see General Tips for an Accurate Measurement, page 10).

MEASUREMENT UNITS

Many methods were used to measure turbidity over the years. The Jackson Candle Turbidimeter was used to measure turbidity as Jackson turbidity units (JTU). The method is visual and is not considered very accurate. To obtain more accurate readings a nephelometer should be used as a turbidity reading instrument.

The HI 847492 haze meter reports the measurements in FTU (Formazin Turbidity Units). FTU units are equal to NTU units (Nephelometeric Turbidity Units). The conversion table between these measurement units is shown below:

SPECIFICATIONS

Range 0.00 to 9.99 FTU

10.0 to 99.9 FTU 100 to 1000 FTU

Range Selection Automatically Resolution 0.01 FTU from 0.00 to 9.99 FTU

0.1 FTU from 10.0 to 99.9 FTU 1 FTU from 100 to 1000 FTU

Accuracy ±2% of reading plus 0.05 FTU Repeatability ±1% of reading or 0.02 FTU, whichever is greater Stray Light < 0.1 FTU Light Source LED @ 580nm Light Detector Silicon Photocell Method Ratio Nephelometric Method. Display 60 x 90mm backlit LCD Calibration Two, three or four point calibration LOG Memory 200 records Serial Interface USB 1.1 Environment 0 to 50°C (32 to 122°F); max 95% RH non-condensing Power supply 4 x 1.5V AA alkaline batteries or AC adapter Auto Shut-off After 15 minutes of non-use Dimensions 224 x 87 x 77 mm (8.8 x 3.4 x 3.0”) Weight 512 g (18 oz.)

FUNCTIONAL DESCRIPTION

INSTRUMENT DESCRIPTION

1) Cuvet Lid.

2) Cuvet Holder.

3) Backlit Liquid Crystal Display (LCD).

4) Splash proof keypad.

5) LED connector.

6) LED Holder.

7) Battery Compartment.

KEYPAD DESCRIPTION

8) ON/OFF: press to switch the meter ON and OFF.

9) GLP : press to enter/exit GLP (Good Laboratory Practice) feature. In SETUP this key is used to increase the set values. In Log Recall it is used to select a new record (scroll up). Hold the key for 3 seconds to activate/deactivate the backlight.

10) AVG : press to select the AVG (Signal Average Mode) on and off. In SETUP it is used to decrease the set values. In Log Recall it is used to select a previous record (scroll down).

11) CAL/RCL: this is a bi-functional key. Just press to enter/exit calibration or in setup mode to start/stop editing a parameter. Hold the key for 3 seconds to enter/exit viewing log content.

12) LOG/CFM: press to save a record or to confirm the selected option.

13) SETUP/DEL: press to enter/exit setup. The DEL function is available in Log Recall mode to delete one or all records. In GLP it is used to restore factory calibration.

14) READ : press to start a measurement. Hold the key to make a continuous measurement. In Log Recall mode it is used to view the content of a record. In GLP it is used to view all available information. In Setup, during date or time editing, it is used to select day, month or year and hour/minutes.

CONNECTORS DESCRIPTION

15) AC adapter connector.

16) USB connector.

17) Tag reader.

DISPLAY DESCRIPTION

1) Battery icon. This icon appears when the status of the battery is displayed or when the battery voltage is getting low.

2) Hour glass icon. It is displayed when the instrument performs an internal checkup.

3) LED and read status indicator.

4) Four digit main display.

5) Measurement units. When average or continuous mode is selected, the unit tag blinks for each new displayed value. For conversions in other units see Measurement Units section.

6) AVG icon appears when the Signal Average Mode is selected.

7) Four digit secondary display.

BEEPER

A long beep indicates an error or an invalid key pressed. A short beep means that the current operation is confirmed.

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