Máy đo độ đục phân tích Bia Hanna HI 847492

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Máy đo độ đục phân tích Bia Hanna HI 847492

Hãng sản xuất: Hanna

Model: HI847492

 

Giá: Liên hệ 0977.459.400

HI847492 Haze Turbidity Meter for Beer

The HI847492 Haze Meter is a highly accurate portable meter for beer analysis that reflects HANNA’s years of experience. The HI847492 is ASBC (American Society of Brewing Chemists) compliant, utilizing a nephelometer to test for turbidity caused by haze. The meter is specially designed for beer quality measurements, providing accurate and precise readings every time.

Signal averaging and continuous measurement mode

Fast Tracker™ - Tag Identification System (T.I.S)

Details

The HI847492 Haze Meter is specially designed for measurement of haze in beer quality analysis. The instrument is based on a state-of-the-art optical system which guarantees accurate results, assures long term stability, and minimizes stray light and color interferences. It also compensates for variations in intensity of the lamp, although proper calibration ensures measurements are fully validated, comparable, and in compliance with regulatory requirements. The 25 mm round cuvettes composed of special optical glass guarantee the repeatability of turbidity measurements.

Features at-a-glance

ASBC Compliant Measurement - The HI847492 meets and exceeds the requirements of the ASBC method for haze measurements. Measurements are taken from beer samples that have been chilled and degassed, and results are reported in Formazin Turbidity Units (FTU).

Calibration –A two, three, or four-point turbidity calibration can be performed by using the supplied (<0.1, 15, 100, and 800 FTU) standards. Calibration points can be modified if user-prepared standards are used.

AMCO AEPA-1 Primary Turbidity Standard - The AMCO AEPA-1 supplied standards are recognized as a primary standard by the USEPA. These non-toxic standards are made of styrene divinylbenzene polymer spheres that are uniform in size and density. The standards are reusable and stable with a long shelf life.

Fast Tracker™ - For users taking measurements throughout their brewery, the HI847492 is equipped with Fast Tracker™ - Tag Identi˜fication System (T.I.S.) that makes data collecting and management simpler than ever. Fast Tracker™ allows brewers to record the time and location of a speci˜fic measurement or series of measurements using iButton® tags on specific tanks for quick and easy readings. Each iButton® tag contains a computer chip with a unique identi˜cation code encased in stainless steel.

GLP Data – The HI847492 features complete GLP (Good Laboratory Practice) functions that allow traceability of the calibration conditions. Data includes calibration points, date, and time.

Data Logging – Up to 200 measurements can be stored in the internal memory and recalled at any time.

Data Transfer – For further storage or analysis options, logged data can be downloaded to a Windows compatible PC using the RS232 or USB port and the HI92000 software.

Backlit Display – A backlit LCD display provides an easy to understand, user-friendly interface. Displayed codes guide the user step-by-step through routine operation and calibration.

Significance of Us

Beer clarity is a parameter constantly controlled in the brewery. Clarity can be affected by haze, or insoluble or semi-soluble particulate matter which is small enough to form a colloidal suspension in beer, typically less than 2 mm. These particles scatter transmitted light and are observed as a degradation in the brilliance of the beer. 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 polyphenols and proteins. These materials exist in equilibrium in beer and manifest themselves as a haze when they combine to form insoluble colloids. 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, particularly after filtration and before the beer enters the bright tanks.

The HI847492 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:

Conversion Table

 

FTU/NTU/FNU

EBC

ASBC

HELM

1 FTU

1 NTU

1 FNU

1

0.25

17.25

10

1 EBC

4

1

69

40

1 ASBC

0.058

0.014

1

0.579

1 HELM

0.1

0.025

1.725

1

Beer Haze Table

Grade

EBC

ASBC

Brilliant

0.0 to 0.5

0.0 to 34.5

Almost Brilliant

0.5 to 1.0

34.5 to 69

Very Slightly Hazy

1.0 to 2.0

69 to 138

Slightly Hazy

2.0 to 4.0

138 to 276

Hazy

4.0 to 8.0

276 to 552

Very Hazy

> 8.0

> 552

 

The HI847492 is designed according to the ASBC standard for haze in beer measurements, compensating for beer color to guarantee accuracy. The light beam that passes through the sample is scattered in all directions. The intensity and pattern of the scattered light is a‰ffected by many variables, such as wavelength of the incident light, particle size and shape, refractive index, and color. The optical system includes an LED light with a 580 nm wavelength, a scattered light detector (90°) and a transmitted light detector (180°).

These meters also incorporate a continuous measurement mode to measure the settling rate of suspended matter, and a signal average mode to accumulate multiple readings, giving a ˜final average value. For beer analysis, the average mode is particularly useful to measure samples with suspended particles with di‰fferent dimensions.  

The HI847492 features a powerful microprocessor that calculates the FTU value from the signals that reach the two detectors by using an eff‰ective algorithm that corrects and compensates for interferences of color. The optical system and measuring technique also compensate for fluctuations in lamp intensity, minimizing the need for frequent calibration.

The HI847492-11 AMCO AEPA-1 standards ensure that measurements are traceable to a primary reference materials. These standards are used for calibration and performance verification of the turbidity meter.


Supplied with Certificate of Analysis

  • Lot number
  • Expiration date
  • Standard value @ 25 °C
  • Reference meter NIST traceable

Provided storage containers

  • Light tight
  • Protects from accidental breakage

Turbidity Specifications

Range 0.00 to 1000 FTU
Resolution 0.01 (0.00 to 9.99 FTU); 0.1 (10.0 to 99.9 FTU); 1 (100 to 1000 FTU)
Range Selection automatic
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 Detector silicon photocell
Method ratio nephelometric method
Measuring Mode normal, average, continuous
Turbidity Standards < 0.1, 15, 100, and 800 NTU
Calibration two, three, or four-point calibration

General Specifications

Light Source LED @ 580 nm
Display 60 x 90 mm backlit LCD
Log Memory 200 records
Connectivity USB or RS232
Environment 0 to 50°C (32 to 122°F), RH max 95% non-condensing
Power Supply 1.5V AA batteries (4) / 12 VDC adapter; auto-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.)
Ordering Information HI847492 is supplied with sample cuvettes and caps (6), HI847492-11 calibration cuvette, 25 mL glass vials with caps (4), cuvette cleaning cloth, batteries, AC adapter, instrument quality certificate, instruction manual, and rugged carrying case.

 

Details

The HI839800 COD Test Tube Heater features two predefined temperature profiles: 150ºC and 105ºC. Digestions for chemical oxygen (COD) and total phosphorus are conducted at 150ºC, while total nitrogen digestions are conducted at 105ºC. The test tube heater automatically heats up to the set temperature, holding it until the countdown timer has finished. Once the timer has ended, a beep will sound and the heating element will turn off. The outer casing of the HI839800 remains cool to the touch, even during a timed digestion. An optional lab safety shield and test tube cooling rack provide a complete setup for sample digestions.

Features at-a-glance

Predefined Temperature Settings - The test tube heater features two predefined temperature profiles at 150ºC (221ºF) and 105ºC (301ºF) that can be selected at the press of a button.

Temperature Alerts - The HI839800 alerts users in the event that the temperature of the heating block is either above or below the set temperature. A timer icon reminds users to wait until the heating block has cooled or warmed up before inserting their samples.

Built-in Timer - A built-in countdown timer of up to 180 minutes allows users to easily set the required digestion time by simply pressing the up and down arrows. Once a time has been set and the heating element is stable, a press of the START button begins the digestion procedure.

Status Indicator Lights - Three LED lights are featured on the HI839800. A green LED indicates the heater has been turned on; a yellow LED indicates when the heater is actively heating up to a set temperature; a red LED indicates when the heater goes above 50ºC, reminding the user that the aluminum element is hot.

Overheating Prevention - The HI839800 contains a thermal fuse that prevents overheating. Should overheating occur, the heater automatically shuts down and all LED indicator lights turn off.

Reference Temperature Well - In addition to the 25 vial capacity of the aluminum heating block, a small well is available for a temperature probe for users that wish to verify their heating block.

Two Operating Modes - The HI839800 features two operating modes: idle and heating. Idle mode is the default mode in which the heater measures and displays the current temperature, target temperature, set reaction time, and an “idle” tag. Heating mode is activated when users press the START button; it starts when actively heating and continues during the countdown timer.

Continuous LCD Display - The block temperature is continuously displayed on the easy to read LCD display, even when there is no active temperature program running. All relevant information in addition to temperature are easily visible during idle and heating mode.

Error Messages - Messages on display alerting to problems including high or low temperature, hot surface, or heating system malfunction.