Rapid Visco Analyser

The Rapid Visco Analyser is a unique tool for product development, quality and process control and quality assurance.

The RVA is a cooking, stirring viscometer with ramped temperature and variable shear capability optimized for testing the viscous properties of starch, grain, flour and foods. The instrument will analyze as little as two or three grams of sample using international standard methods or your own tailor-made test routines of mixing, measuring, heating and cooling.

Applications include: flour and grain quality, native starches, modified starches and starchy samples, formulated foods (e.g. sauce, ketchup, gravy, dressing, mayonnaise, soup, dairy beverages) other ingredients and foods (e.g. hydrocolloids & proteins), cooked and extruded foods (e.g. ready to eat breakfast cereals, snack foods, pet foods, fish feeds and animal feeds), meltability tests (e.g. process cheese, chocolate and confectionery)  and “Miniature Pilot Plant” small scale process emulation.

The new RVA 4800 can perform regular tests below 100°C, as well as high-temperature tests up to 140°C in a specially designed pressure vessel.

Features and benefits - RVA viscometers

Rapid Visco Analyser: Temperature and Viscosity Range to suit your samples: Mid viscosity range for most samples (RVA-TecMaster), extended range for high viscosity combined with high sensitivity for low viscosity (RVA 4500), and mid range with four preconfigured methods for routine samples (RVA-StarchMaster2). High temperature range, up to 140°C (RVA 4800). Rapid Viscosity Profile: Standard starch pasting test in 13 minutes. Easy to Use: Automated operation of RVA 4500 and RVA-TecMaster using Thermocline for Windows (TCW) minimizes training and ensures reliability. Stand-alone option: Preconfigured RVA-StarchMaster2 operates simply; no computer required; no software to learn. Calibration: Check with traceable standards to comply with ISO9000 and Quality System requirements. Glass-free: Safe for food manufacturing areas. Relevant: Tailor test routines to emulate processing conditions in industry.

Thermocline for Windows (TCW) Software: Programmable Instrument Control:“Profile” style method set up with advanced options and auto functions for flexibility and ease of use. Flexible Data Analysis: Auto functions for commonly derived parameters and advanced functions for research. Real Time Graph Display: Interactive and overlay functions for clarity. Single Page Report: Traceability data, results and the graph all on a single page. Traceability: Complies with ER/ES (electronic records/electronic signatures) requirements for data security.

RVA Viscometer Models

Perten Instruments offers a range of Rapid Visco Analyser  models and accessories to suit your needs.

The RVA 4800 offers an extended temperature range up to 140°C.

The RVA 4500 and RVA-TecMaster combine speed, precision, flexibility and automation with Thermocline for Windows (TCW) software for viscometric data acquisition and analysis.

The RVA-StarchMaster2 offers the same speed and precision with simple stand alone operation. The RVA-StarchMaster2 is ideal for routine testing, process and quality control.

NEW - RVA 4800

With the extended temperature range (up to 140°C), the RVA 4800 provides a tool for performing more relevant analysis for a variety of applications, including ingredient (e.g. starch and hydrocolloid) performance under conditions relevant to ultra-high-temperature (UHT) pasteurization of dairy and food products, retorting, pressure cooking, extrusion and other aseptic processing conditions.

RVA 4500

The best choice for analyzing low viscosity samples (down to 10 cP at 160 rpm) because of its exceptional sensitivity and accuracy.

Low viscosity applications include: low solids starches (e.g. ethylated & cationic starch for paper & packaging), low viscosity food starch (e.g. acid/enzyme thinned), low viscosity products (e.g. sauce, ketchup, gravy, dressing, mayonnaise, soup, dairy beverages) and other low viscosity non starch foods (e.g. with hydrocolloids & proteins).

Also optimized for the widest viscosity range (up to 25,000 cP at 160 rpm).

High viscosity applications include: extruded and cooked foods (e.g. ready to eat breakfast cereals, snack foods, pet foods, fish feeds and animal feeds), meltability tests (e.g. process cheese, chocolate and confectionery) and high solids and high viscosity modified starches (e.g. substituted and cross linked cook up food starches).

RVA-TecMaster

A fully featured viscometer for analyzing most samples. It covers the mid viscosity range (20 - 8,000 cP at 160 rpm). General purpose applications include: starches and starchy samples, hydrocolloids, proteins, formulated, cooked and extruded foods and “Miniature Pilot Plant” small scale process emulation.

RVA-StarchMaster2

The easy to operate, stand alone (no computer or software required), economical viscometer for routine analysis of  most samples. It covers the mid viscosity range (20 - 8,000 cP at 160 rpm). Routine applications include: starches and starchy samples, hydrocolloids, proteins, formulated, cooked and extruded foods, flour and grain quality.

Specifications

MODELS	RVA 4800	RVA 4500	RVA- TecMaster
Power Requirements:	240 VAC, 3,5 A, 50/60 Hz / 115 VAC, 5 A, 50/60 Hz
Input/Output	USB port, RS232 serial port		USB for PC, LIMS, USB drive, label printer, keyboard, barcode scanner
Dimensions: (HxWxD)	382x306x345 mm	382x306x345 mm	320x254x398 mm
Net Weight:	19 kg	18 kg	18 kg
Temperature Range:	0-140°C	0-99.9°C
Heating/Cooling Rate:	Up to 14°C/minute (infinitely variable).
Coolant Consumption:	Water, 1 l/min at cooling, 100-250 kPa.*
Speed Range:	Computer controlled infinitely variable 0,20 – 2000 rpm
Viscosity Range:	20-50,000 cP at 80 rpm, 10-25,000 cP at 160 rpm	20-50,000 cP at 80 rpm, 10-25,000 cP at 160 rpm	40-16,000 cP at 80 rpm, 20-8,000 cP at 160 rpm
Viscosity Accuracy:	+/- 2% for S2000 oil nom. 5000 cP.		+/- 3% for S2000 oil nom. 5000 cP.