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Immersion-Type Process Viscometer
PV100-TM06(250)
The process viscometer PV100-TM06(250) works on the principle of a
rotational viscometer with cylinder measuring unit.
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.
The rotation is transmitted directly from the measuring head to the
measuring bob, which is screwed into the measuring shaft. The
measuring shaft is held in the flange sleeve in low-friction bearings.
The measuring bob rotates freely in the measured substance. To maintain
the correctness of the displayed viscosity values, the diameter of the
process vessel must be large in relation to the diameter of the measuring
bob (10 times minimum).
To prevent a contamination of the measuring shaft bearings, a gas counter
flow is led from the measuring head towards the measuring bob. The gas
counterpressure to be applied through a threaded fitting in the flange
sleeve must always be slightly higher than the process pressure.
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
and closed vessels with low operating pressures. The immersion
depth is determined by the length of the measuring bob.
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-TM06(250) 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] |
30 to 1.6*105 |
60 to 3.5*105 |
6*103 to 3.5*107 |
speed range [rpm]
(8 adjustable steps) |
1 to 250 |
1 to 250 |
0.01 to 2.5 |
in connection
with spindle |
ZP20 |
ZP21 |
ZP21 |
shear rate range
[s-1] |
0.208 to 52 |
0.201 to 51.8 |
2.07*10-3 to 0.518 |
shear stress range
[Pa] |
1.6 to 33.3 |
3.1 to 70.35 |
3.1 to 70.35 |
| accuracy |
2.5 % |
| pressure range |
up to 6 bar (by gas counter pressure) |
| temperature range |
-30 °C to +150 °C |
| mechanical connections |
flange connection DN80; PN06
threaded fitting M10x1 for gas counter pressure |
| immersion depth |
250 mm |
| 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 (S02)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 Ra ≤ 350 Ohm analogous,
digital via RS485 interface |
Optional
1. PV100 control unit VC1
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| 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)
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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
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