Description; Preparation Of The Sample; Selection Of The Capillary; Cleaning The Viscometer - SI Analytics Cannon-Fenske 513 10 Mode D'emploi

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Description

The Cannon-Fenske Routine Viscometer consists essentially of 2 tubes, the tube with capillary (1) and the
venting tube (2), the reservoir (3), the upper timing mark M1 (4), the lower timing mark M2 (5), the pre-run
sphere (6), the capillary (7) and the measuring sphere (8).
The Cannon-Fenske Routine Viscometer is in accordance of technical measurements to standard like
ISO 3105, ASTM 446 and D 2515. With the tube expanding (9), the viscometer is also convenient for
automatic measuring system.
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Preparation of the sample

Low viscosity samples must be filtered through a SCHOTT glass filter porosity 2 to 4 (10 ... 100 µm)
before the measurement; high viscosity samples, through a sieve with 0.3 mm mesh width (test sieve
cloth 0.2, DIN 4 188). Samples, whose stock value in accordance with DIN 51 583 or pour point in
accordance with DIN 51 597 is not at least 30 °C lower than the test temperature must be heated up to
50 °C before the measurement.
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Selection of the capillary

The size of the capillary is to be selected in such a way that the uncertainty inherent in the kinetic energy
correction (HC) does not exceed the allowable error for the time measurement (see table). For precision
measurements, the correction seconds in brackets should not be used. If necessary, a viscometer with a
narrower capillary is to be used.
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Cleaning the viscometer

Before the first use, a cleaning with 15 % H
then be rinsed with a suitable solvent. It must be completely dry and dust-free and can thereby be used for
automatic measurements.
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Filling the viscometer

For filling, the Cannon-Fenske Routine Viscometer is placed on its „head". The tube with capillary (1) is
submerged in the liquid to be measured while suction using a hose is applied to the venting tube (2) until
the liquid reaches the lower timing mark M2. During automatic measurement after being turned back into
the normal measuring position, the viscometer connected with its particular hose accessories
( Operating Instructions for the corresponding AVS device) and fixed in the measurement stand with
the fitting type no. 065 99 is placed in a Transparent Thermostat from SI Analytics GmbH. During
manual measurement the viscometer will be fitted after inverting to normal measuring position with its
stand type no. 064 99 vertically into a Transparent Thermostat from SI Analytics GmbH.
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Adaptation of the sample to the bath temperature

If the accuracy of the viscometer measurement is to be fully utilised, the thermostat should keep the
measuring temperature constant within ± 0.01 °C (Transparent Thermostat from SI Analytics GmbH).
The measurement should only be carried out after a waiting time of approx. 10 minutes.
10
O and 15 % HCl is recommended. The viscometer should
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