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The low temperature
Viscometer has been designed to facilitate routine measurement
of the viscosity of paints. Good correlation with application
methods (e.g. brushing) is ensured by the use of a high
rate of shear (10,000 sec-1). The cone & plate principle
is selected because this is one of the most convenient
ways of obtaining high rates of shear. |
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The ranges of measurement of
0-2, 0-5 poises and 0-10 poises are chosen as suitable
for most normal paints. Alternative rates of shear or
ranges of measurement can be obtained by using cones of
alternative size or angle. |
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Temperature control is essential
in measuring the viscosity of paint. This Viscometer has
built-in provision for holding the sample at the temperature
reagdless of normal variations in the bulk sample or in
room temperature. Heating or cooling of the sample is
by a Peltier effect semi-conductor device. The sample
reaches the control temperature in no more than 15 seconds.
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"A sample a minute"
is well within the capacity of this Viscometer. |
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The high temperature Viscometer
has been designed for the control of the viscosity of
resins, bitumens, hot melts and similar products, during
manufacture. |
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These Viscometers enable a very
small sample from the cooking vessel to be checked for
viscosity in less than a minute. The instrument is thermostatically
controlled over a wide range of temperatures, one of which
is selected so that the melt viscosity of the resin comes
within the viscosity of the instrument. |
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In this way, thinning tests are eliminated
and a quick and accurate determination of resin viscosity
is obtained. |
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Ease of cleaning is ensured by virtue of
the small sample required and the ease of access which
is possible with the simple geometry of the cone and plate
principle. A wipe with paper tissue and suitable solvent
is all that is normally required.
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Specifications:
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| Electrical supply |
220-240 Volts or 110-120
Volts 50/60 Hz
single phase. |
| Power |
125 Watts |
| Standard viscosity range |
0-2 poises at 10,000 sec-1
0-2.5 poises at 10,000 sec-1
0-5 poises at 10,000 sec-1
0-10 poises at 10,000 sec-1
0-20 poises at 2,500 sec-1
0-40 poises at 2500 sec-1
0-100 poises at 2500 sec-1 |
| Cone Type |
To suit range: 0-2, 0-2.5, 0-5, 0-10,
0-20,0-40, 0-100 poises |
| Accuracy |
+/- 2% of full scale, confirmed using
PRAoils traceable to National Standards. |
| Warm-up from cold |
15 minutes |
| Temperature control of sample |
One or three switched temperatures
in
the range 10 degrees C - 75 degrees C,
six temperatures
in the range 25 degrees C - 230 degrees C. |
| Time for sample to obtain control
temperature |
20 seconds |
| Ambient Temperature H.T. Instrument |
To calibrate the high temperature
instrument at 25 degrees C, the ambient
temperature
should be <20 degrees C. |
| Ambient Temperature L.T. Instrument |
The ambient temperature will affect
the
instrument lowest temperature. Lowest
temperature
achieved is 10 degrees C.
below ambient. |
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