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Continuous-Flow Process Viscometer PV100-DM64
     
     
 
     

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    The process viscometer PV100-DM64 works on the principle of a rotational viscometer  
    with coaxial cylinder systeme.  
       
    Its basic components are a measuring head and a continuous-flow measuring unit  
    connected by a flange sleeve. The measuring head holds the drive unit, which is either a  
    controllable d.c. motor or a synchronous motor, as well as the torque sensor und the  
    electronics producing the measuring signal.  
       
    From the measuring head, the rotation is transferred through a spacer shaft to the  
    permanent-magnetic coupling, which is supported in the pressure-proof measuring  
    sleeve. The magnetic field transfers the torque through the thin-walled measuring sleeve to  
    the rotating measuring element. The latter is enclosed by the measuring beaker. The  
    measuring element is supported by low-friction pin suspensions in the measuring sleeve  
    and measuring cup.  
       
    Measuring sleeve, measuring element and measuring cup form a coaxial double-slotted  
    cylinder measuring system. The measuring system is enlosed by the continuous-flow cell  
    through which the measured substance can flow in a main and a partial stream.  
    Due to a specific design, part of the substance flow is continuously led through the  
    measuring gap of the cylinder system. The viscosity-proportional torque occurring on the  
    measuring bob is measured in the measuring head and converted into an electric  
    standard current signal 4...20 mA, which can be used for display and as a control signal.  
       
    The immersion measuring device is designed for use with open containers or closed  
    vessels up to high operating pressures. The immersion depth of measuring system is  
    variable within wide limits by the length of the flange sleeve.  
       
    The process viscometer can be completed with an electronic unit for more functions of  
    instrument control, signal processing, as well as temperature adjustment of viscosity.  
       
 

Recommended Applications

 
    The process viscometer PV100-DM64 is suited for continuous viscosity measurement in a wide variety of substances, such as  
   
  • suspensions     		 
       
  • diary products    		  
       
  • lacquers or varnishes    		  
       
  • printing inks    		  
       
  • emulsion paints    		  
       
  • lubricants    		  
       
  • latex    		  
       
  • polymer solutions    		  
       
  • coal suspensions    		  
       
  • glues or adhesives     		 
       
  • resins     		 
       
  • coating slips     		 
       
  • chocolate suspensions     		 
       
  • sealing compounds     		 
       
  • fruit mash or preparations    		  
       
  • vegetable mash     		 
       
  • coating colours     		 
       
  • cosmetics     		 
       
  • solutions     		 
       
  • emulsions     		 
       
  • mud    		  
        The rheology consultants of RheoTec will be pleased to help you analysing your specific application probleme, and, based on their profound rheological knowledge, they will find exactly the equipment configuration you need to solve it.  
           
      Technical data  
       
    Measuring Head MH10 MH16 MH16G
    viscosity range
    [mPas]     		2 to 10 4 20 to 10 5 10 3 to 10 7
    speed range [rpm]
    (8 adjustable steps)     		1 to 250 1 to 250 0.01 to 2.5
    in connection
    with spindle systeme     		MS-ZP1 MS-ZP2 MS-ZP2
    shear rate range
    [s -1 ]     		4.4 to 1.1 * 10 3 7.64 * 10 -1 to 191 7.64 * 10 -3 to 1.91
    shear stress range [Pa] 2.2 to 44 4 to 76.4 4 to 76.4
    accuracy 2.5 %
    pressure range up to 64 bar
    temperature range -20 °C to +300 °C
    mechanical connections of flow cell flange connections DN25 to DN100
    flow rate range (for DN40) 0.1 to 6 m 3 /h
    materials for components that are exposed to the measured substance 1.4571 (DIN 17440)
    explosion protection II 2G EEx de IIB T6
    (according to ATEX standard)
    protection class IP54
    climatic conditions -25/55/30/90//42 (S0 2 )1-3
    installation position max. 30° deviation from vertical
    (or overhead operation)
    power supply motor:
    24 V DC, 500 mA
    signal circuit:
    24 V DC, 20 mA
    (supplied from an external source or by PV100 control unit VC1)
    measuring signal 4...20 mA to R a ≤ 350 Ohm analogous, digital via RS485 interface
    		 
           
      Optional  
        1. PV100 control unit VC1  
       
    		 
       
    PV100 control unit VC1
    		 
        operations:  
       
  • supply of voltages 24 V DC for motor, signal circuit and temperature sensor    		  
       
  • setting of viscosity range, speed step, limit value monitoring    		  
       
  • measuring signal 4... 20 mA analog or digital via interface RS485 for viscosity and   temperature    		  
       
  • data output on display (viscosity, measuring range, temperature, shear rate, shear   stress)    		  
       
  • temperature correction of viscosity based on a fixed viscosity-temperature-equation   regarding a wide temperature range, display and output of reference viscosities    		  
       
  • automatic range search run, overload protection    		  
        The process viscometer electronics is available as plug-in rack in 19" systemes for one or two viscometers, or as splash-proof surface-type casing.  
           
        power supply : 90 to 253 V AC, 50/60 Hz  
        protection : IP20 (rack)
    		 
                    IP54 (surface-type casing)  
        2. Temperature sensor Pt100  
       
  • optional delivered with transducer    		  
       
  • 4 temperature ranges: -30°C to +60°C, 0°C to +100°C, 0°C to +200°C, 0°C to +500°C     		 
           
        3. Cooling unit KL  
        for reduction of heat conduction from probe to measuring head