Xylem SI Analytics AVS 370 Manual De Instrucciones página 37

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 from
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SI Analytics : Ubbelohde viscometers according to DIN and ASTM, micro Ubbelohde viscometers
according to DIN, Cannon-Fenske routine and micro Ostwald viscometers as well as TC viscometers.
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
of national standard gauges, SI Analytics
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 guards
etc.). Depending on the intended use of the AVS
these devices, please refer to the items below.
TC-Viscometer with thermistor sensors
2.3.1
Fill the viscometer (approx. 18 - 20 ml), then place it in the thermostat bath. Connect the AVS
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 III module VZ 8562 (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
pneumatic screwed connections to the ViscoPump III module of the AVS
Viscometer with light-barrier sending
2.3.2
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. 5, 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. 5 Inserting or replacing a viscometer with light-barrier sensing
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guarantees an absolutely precisely reproducible calibration.
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370, it may be highly recommendable to connect
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370.
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