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The process viscometer PV100-TM64 works on the principle of a rotational viscometer
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with coaxial cylinder systeme. |
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Its basic components are a measuring head and a continuous-flow measuring unit |
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connected by a flange sleeve. The measuring head holds the drive unit, which is either a |
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controllable d.c. motor or a synchronous motor, as well as the torque sensor und the |
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electronics producing the measuring signal. |
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The rotation is transmitted from the measuring head over a connecting shaft to the |
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permanent-magnet coupling, which is located in the pressure-resistant measuring sleeve. |
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The magnetic field transfers the torque through the thin-walled measuring sleeve onto the |
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rotating measuring bob. This mesuring bob is enclosed by the measuring cup. In the |
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measuring sleeve and in the measuring cup, the measuring bob is held in low-friction pin |
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supports. |
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Measuring sleeve, measuring bob and measuring cup form a coaxial double gap cylinder |
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system. |
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Due to a specific design, part of the substance flow is continuously led through the
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measuring gap of the cylinder system. The viscosity-proportional torque occurring on the |
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measuring bob is measured in the measuring head and converted into an electric |
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standard current signal 4...20 mA, which can be used for display and as a control signal. |
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The immersion measuring device is designed for use with open containers or closed |
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vessels up to high operating pressures. The immersion depth of measuring system is |
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variable within wide limits by the length of the flange sleeve. |
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The process viscometer can be completed with an electronic unit for more functions of |
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instrument control, signal processing, as well as temperature adjustment of viscosity. |
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Recommended Applications |
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The process viscometer PV100-TM64 is suited for continuous viscosity measurement in a wide variety of substances, such as |
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suspensions |
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diary products |
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lacquers or varnishes |
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printing inks |
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emulsion paints |
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lubricants |
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latex |
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polymer solutions |
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coal suspensions |
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glues or adhesives |
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resins |
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coating slips |
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chocolate suspensions |
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sealing compounds |
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fruit mash or preparations |
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vegetable mash |
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coating colours |
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cosmetics |
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solutions |
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emulsions |
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mud |
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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. |
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Technical data
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| 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 |
flange connection DN80 |
| immersion depth |
250 mm / 500 mm / 1,000 mm
or 1,500 mm (other on request) |
| 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 |
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Optional
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1. PV100 control unit VC1 |
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PV100 control unit VC1 |
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operations: |
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supply of voltages 24 V DC for motor, signal circuit and temperature sensor |
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setting of viscosity range, speed step, limit value monitoring |
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measuring signal 4... 20 mA analog or digital via interface RS485 for viscosity and temperature |
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data output on display (viscosity, measuring range, temperature, shear rate, shear stress) |
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temperature correction of viscosity based on a fixed viscosity-temperature-equation regarding a wide temperature range, display and output of reference viscosities |
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automatic range search run, overload protection |
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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. |
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power supply : 90 to 253 V AC, 50/60 Hz |
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protection :
IP20 (rack)
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IP54 (surface-type casing) |
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2. Temperature sensor Pt100 |
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optional delivered with transducer |
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4 temperature ranges: -30°C to +60°C, 0°C to +100°C,
0°C to +200°C, 0°C to +500°C |
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3. Cooling unit KL |
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for reduction of heat conduction from probe to measuring head |
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