RFM300+ refractometer

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RFM340+ Prism Dish

 

Measurement Features:
• Very high accuracy Brix*
• Easy clean prism
• Wide Range – 1.32 to 1.58 RI
• Standard RI and Brix range
• User Scale Library
• Sucrose SG Scales
• 5-decimal place RI
• Wide Temperature Range
• Peltier Temperature Control
• SMART temperature stability
• Auto read function

Software Features:
• Dual scale display
• Improved navigation
• Measurement Methods
• Rapid method offsetting
• Method specific resolution
• Auto-resolution function
• Temperature Stability Checks
• Reading Limits Check
• Calibration Log/Audit Reports
• PIN Protection
• Barcode Reader option
• GLP Printout
• 700 stored results
• Tabular form of saved results
• 21 CFR Part 11
• Audit Trails
• Display language options

Methods:
• Equivalent Brix/SG
• Coffee Total Solids
• Daily Offsets

Conforms to GLP, OIML; ASTM D 5006, USP/EP/BP; and with optional software, operational requirements of FDA regulation 21 CFR Part 11.

RFM300+ Refractometers

RFM300+ series refractometers are considered by many leading companies as the ultimate instrument for installation in demanding factory environments as well as for use as a primary quality control tool. Since it’s original launch in 1992, over 5,000 models have been installed across the globe and following a complete re-design in 2008, the RFM300+ series of refractometers still offers all the original design attributes but with a wider refractive index range, Peltier temperature control and a more versatile software structure. A shallow, easy to clean prism dish houses a single sapphire prism optical system protected by a sample presser that may also be used to instigate a measurement without the need to press the read button. A large sampling area on the prism surface allows measurement of not only homogenous fluids like juices, sodas, sauces and edible oils but also difficult to read samples like fruit pulps and industrial resins.

Intelligent software ensures rapid temperature response to change in prism temperature, whilst the SMART temperature stability check makes sure that the result is displayed only when the sample is stable. A Methods system allows rapid configuration of instrument setup and provides limit checks against stored data as well as product specific offsets and acid corrections. Over 700 readings may be stored within the instrument memory and the on-screen menu may be displayed in a number of different languages.

The instrument is available in two formats, the most popular being the 2-decimal place RFM340+ refractometer, which following improvements to the thermodynamic control system, now has an increased measurement performance between 0-20°Brix and so reduces potential measurement error in the critical range covering finished products like the aforementioned juices and sodas. By improving the performance at the low end of the scale, users may now trim syrup dilution to the absolute minimum without the risk of breaching manufacturing specifications!

SG scales for sucrose are also common to the series. These scales may be used to express the relative density of pure sucrose solutions and when used in conjunction with a product offset from within the Methods system, can express finished beverages as an equivalent SG and by doing so, contract packers of beverage products may now use a refractometer in situations where density °Brix or SG is dictated as the method of analysis, whilst retaining all the measurement advantages held by a refractometer.

Additionally, all RFM300+ series refractometers have the ability to display the measured result in two scale formats such as a Brix value based on SG alongside the original refractive index measurement. Optional software is also available at point of order to allow use in an environment controlled by FDA regulation 21 CFR Part 11 as well as optional devices that allow use in wet and humid factory environments, offering ultimate protection under the worst of environmental conditions.

RFM340+ Refractometer Enhanced Performance
RFM340+ RI °Brix
Scale 1.32-1.58
  1) 1.32-1.36
  2) 1.36-1.58
0-100
  1) 0-20
  2) 20-100
Accuracy*   1) ±0.00002
  2) ±0.00004
  1) ±0.01
  2) ±0.03

Specifications RFM330+ RFM340+
Scales
  Refractive Index
  Sugar (°Brix)
  User-defined (100 scales - configurable)

1.32 – 1.58
0-100
Yes

1.32 – 1.58
0-100
Yes
Resolution
  Refractive Index
  Sugar (°Brix)
0.0001
0.1
0.00001
0.01
Accuracy
  Refractive Index

  
  Sugar (°Brix)

±0.0001


±0.1

±0.00002 (1.32 – 1.36 RI) ±0.00004 (1.36 – 1.58 RI)

±0.01 (0 – 20 °Brix)
±0.03 (20 – 100 °Brix)
User Scale Library on-board 20+ preprogrammed scales including HFCS (3), wine (5), sugar (4), urine SG (3), Urea, sucrose SG (3), FSSI, NaCl, Butyro etc.
Plus customer programmable scales by PC software.
Presser Type Polyacetal
Reading Time Minimum 4 seconds
Measuring Temperature Range 10 °C below ambient to 70 °C
Temperature Sensor Accuracy ± 0.03 °C
Sample Temperature Stability ± 0.05 °C
Temperature Compensation
  Sucrose (°Brix)
  AG Fluids
  User-defined
5 – 70 °C
Simple coefficient (units/ °C) or polynomial
function
Temperature Stability Checks SMART, DELAY, NONE - independently selectable by Method
Ambient Humidity Range <90% RH


Physical Specification
Prism Artificial Sapphire (Single). 12mm sample area diameter
Prism Dish 316 Stainless Steel / PEEK
Prism Seal Silicon/Resin
Interfaces 1 Parallel (printer), 2 x Serial (RS232)
Sample Illumination Light Emitting Diode (life 100,000hr +) 589nm
Temperature Control Peltier
Power Supply External 100-240V, 50-60Hz. Supplied with instrument

Order Code Description
22-30 RFM330+ Refractometer incl. standard power supply and instructions
22-40 RFM340+ Refractometerwith enhanced measurement performance incl. standard power supply and instructions
22-80 Enhanced Protection Pack
55-250 Waterproof Power Supply Unit
26-155 Splash Cover
22-121 Optional on-board software and user license – 21 CFR Part 11 (factory option only at time of manufacture)
22-017 “Contact Presser” insert for jams and marmalades

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