Online Rheological Measurement Experience the Benefits of Online Rheology Measurement

THE VISCOSENSOR RSU 

The ViscoSensor employs a stacked pair of metering pumps to isolate it from the process, to direct the molten polymer across interchangeable capillaries, and to pump the molten polymer back into the process. A three wire platinum RTD is used to control and measure the temperature of the molten polymer. Two Dynisco Vertex Mercury Free pressure transducers (now comes standard) mounted directly before and after the die, are used to capture the pressure drop across the capillary.

VISCOSENSOR RCU: ULTIMATE PERFORMANCE

Our high performance RCU combines the rheological properties of a Laboratory Capillary Rheometer with MFI readings delivered by a Melt Flow Indexer.  It has been updated with a Siemens S7-1500 PLC with a Siemens 7” (178mm), Comfort Panel Touch Screen HMI. This combination provides increased processing pow-er and hi-end graphics enabling the RCU to provide +/- .5% Full Scale Accuracy.  This allows the RCU to better align measurements  with those taken from laboratory instruments.  Furthermore, it is certified for hazardous environments as needed.
 

 

 

 

VISCOSENSOR e-RCU: PERFORMANCE SIMPLIFIED 

The ViscoSensor e-RCU offers a simplified PLC with the digital and analog I/O that most plants would need for a  cost effec-tive approach to measuring online rheology.  It  has a Siemens S7-1200 PLC with a Siemens 7” (178mm) Comfort Panel Touch Screen HMI. This combination provides the system with processing power and hi-end graphics allowing the e-RCU to provide +/- 2% Full Scale Accuracy. The e-RCU provides the processor the ability to measure Melt Flow Ratio, Relative Viscosity, Intrinsic Viscosity, and Melt Viscosity in typical end-user environments. All of which create a cost-effective system that reduces the risk of failure to an acceptable level. If conditions change and the system is needed in a hazardous and/or classified location, compatibility with the standard RCU allows for an easy upgrade. 
 

PERFORMANCE CHARACTERISTICS 

 

Melt Flow Index	0.1 - 25000 g/10 min
Viscosity Range	10 – 105 Pas
Shear Stress	150 - 1.5 x 105 Pa
Shear Rate	0.1 – 7500 s-1 (standard die) max 50,000 s-1 (special die)
Dies
Temp. Range	40 – 350°C
Pressure Range	3 x 105 – 3.5 x 107 Pa
Metering Pump	0.16 cm3 / RPM (standard) 0.297 cm3/ RPM (optional) 0.584 cm3/ RPM (optional)
Pump Speed	3 – 75 RPM
Polymer Flow	225 g/hour (average)

 

 

MEASUREMENT AND CONTROL FUNCTIONS

 

 

Test Modes
Shear Stress Mode
Set point	Pressure
Measurement	Melt Flow Index
Shear Rate Mode
Set point	Pump Speed
Measurement	Apparent Viscosity
Temperature Control	3 Heating Zones

 

 

ANALOG OUTPUTS: (4 – 20 MA STANDARD)

 

 

Options	• Melt Flow Index • Apparent Viscosity  • Melt Temperature • Melt Pressure • Pump Speed • Temp. Pump Zone • Temp. Die Zone	Select any 2 of the following: • Melt Pressure • Delta-Pressure • Melt Flow Index • Apparent/Intrinsic Viscosity