UR24 Process RefractometerUR24 Process Refractometer

UR24 Refractometer

UR24 - Optical Path

1

2

34

5

6

1 - LED SOURCE

2 - BICONVEX LENS

3 - ENTRANCE LENS

4 - PRISM

5 - EXIT LENS

6 - CCD DETECTOR

85 Brix

10 Brix

0 Brix

UR24 - The four basic elements

In order to obtain a refractometric measure need four basic elements:

1) A light source (LED source)

2) An optical sensor (CCD sensor)

3) A well defined optic path (lenses and instrument geometry)

4) A prism made in high nD material

1

2

UR24 - Interface detection

Threshold

Derivative

UR24 - Technical features

• Measurement limits: 0-95 Bx

• Measurement range UR24 ST: min 30 Bx, max 95 Bx

• Accuracy ST version: 0.5% measurement range (+/- 0.15 Bx)

• Measurement range UR24 H.A.: min 15 Bx, max 95 Bx

• Accuracy H.A. version: 0.3% measurement range (+/- 0.05 Bx)

• “User” range on request

• Pt100 external temperature sensor (internal on request)

• Automatic temperature compensation: -5 °C / 105 °C

• Long probe version for boule applications and/or high temperature applications (up to 140 °C)

• Analog output: 0-20, 4-20 mA

• Serial output: RS422/485

• Profibus module on request

• Washing/Alarm contact

• Hold measure contact

• Power supply:

18-36VDC 10W or 12-24VAC 50-60Hz 10VA (AC 115/230V ±10% 50…60Hz 10VA on request)

• Sapphire prism

• Removable prism-holder

• High efficiency LED light source

• CCD optical sensor (2048 pixels)

• Single board SMD electronics

• Serial port software upgrade

• Dehydrating cartridge

• Interfacing with water proof connector

• LCD graphic display

• 4-keys polyester membrane keypad

• 3A enclosure on request

• Materials in contact with product:

AISI316, sapphire/glass (others on request)

• Working pressure: -1 / 15 bar

• Weight: 3Kg

• Enclosure: stainless steel IP67

UR24 - Technical features

UR24 Standard

UR24 Long Probe with Tri-Clamp at 21mm

UR24 Long Probe with Tri-Clamp at 70 mm

UR24 Adaptors

UR24 - Installation examples

on line

by pass

UR24 - Installation examples

pump

on boule

UR24 - Special plug for selfcleaning

speed = flow rate

clearance section =

flow rate

* clearance widthclearance heigth

Each product has its own optimal speed for prism selfcleaning

Changing the clearance height allows to have the optimal cleaning

for each product

UR24 - Cleaning systems

• special plug with

washing

• special plug with

mechanical cleaner

UR24 - Cleaning systems

• special plug with

mechanical cleaner

and washing

• washing on pipe • washing on tank

UR24 - User configuration

% weight/weight

nD

0 168 25 33 42 501,33

1,38

• nD - concentration

Instrument takes into account typical behaviour for nD

• nD - temperature

nD1,30 1,40

10

20

30

T (°C)

20% in water

Default configuration: sucrose solution curves

UR24 - User configuration

Product sampleProduct sample

TermostatingUnit

1st STEP: at 20°C fixed temperature find the relationship between the concentration and the refraction index.

2nd STEP: at fixed concentration find the relationship between the corrections, you have to add to the 20°C value and the temperature

3rd STEP: transfer data in the UR24 refractometric unit

UR24 - User configuration

• REFRACTION INDEX-CONCENTRATION configuration

Found the relationship between concentration and nD at seven

different values of concentration at 20 °C for desired product

nD %

1.3345 0.0

1.3401 5.1

1.3487 12.7

1.3576 19.1

1.3612 29.7

1.3762 38.5

1.3832 49.7

UR24 - User configuration

• TEMPERATURE COMPENSATION configuration

Measuring the refractive index at three different concentrations at

three different temperatures, insert the errors in temperature table

(difference between read values of each concentration at that

temperature and at 20°C)