Connecting The Viscometers And Other Devices; Tc-Viskosimeter Mit Thermistor-Sensoren; Viskosimeter Mit Lichtschrankenabtastung - Xylem SI Analytics AVS 370 Manual De Instrucciones

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2.3

Connecting the viscometers and other devices

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The AVS 370 Viscosity Measuring Unit allows the use of most various viscometer types:
DIN, ASTM, Ubbelohde and Micro Ubbelohde viscometers as well as Cannon-Fenske Routine, Micro
TC and Micro Ostwald viscometers.
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Owing to careful manufacture and quality-assurance procedures, all viscometers from SI Analytics
meet the highest accuracy standards.
The K viscometer constant is determined individually by way of a calibration of each glass capillary
viscometer. Owing to the use of high-quality measurement and testing equipment and the application
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of national standard gauges, SI Analytics guarantees an absolutely precisely reproducible calibration.
For Ubbelohde viscometers having the same constant, the same correction seconds (Hagenbach
correction) are valid. Gauging by the user is not necessary, since the corrections correspond to the
theoretical values as taken from the operating instructions for the viscometers. This statement is true
for both Ubbelohde viscometers of normal size as well as for micro viscometers.
It is also possible to connect or control other devices (such as absorption traps, overflow
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guards etc.). Depending on the intended use of the AVS 370, it may be highly recommendable to
connect these devices, please refer to the items below.

2.3.1 TC-Viskosimeter mit Thermistor-Sensoren

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Fill the viscometer (approx. 18 - 20 ml), then place it in the thermostat bath. Connect the AVS 370
Viscosity Measuring Unit and the TC viscometer using the hose/cable combination which comes with
the device. To do so, place the device in the holders, then attach the quadruple plug of the cable to
the viscometer and the ViscoPump II module (first plug, then screw); subsequently, make the screwed
connections in accordance with the numbers indicated on the hoses and the rack. In the case of
"pressing" operation, the capillary tube remains open, for "sucking" operation the filling tube is to be
left open. Please observe the colour codes (red = sucking, black = venting) when attaching the
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pneumatic screwed connections to the ViscoPump II module of the AVS 370.

2.3.2 Viskosimeter mit Lichtschrankenabtastung

Use the hose/cable combination to make an electrical and pneumatic connection between the
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AVS 370 and the measurement stand. The plugs are firmly connected to the sockets by rotating the
union sleeve. Please observe the colour codes (red = sucking, black = venting) when screwing the
threaded pneumatic connections into the ViscoPump II module. Please insert the selected capillary
viscometer into the fixating rack as is shown in fig 4., then fill it. Insert the fixating rack together with
the viscometer into the measurement stand (with the cut-out at the bottom sheet pointing forwards).
The cut-out will latch into the lug provided. Pressing the viscometer slightly against the fixating rack
will latch it into the holding spring located on the measurement stand.
Fig. 4 Inserting or replacing a viscometer with light-barrier sensing