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3.8 Prepare for measurement
• Wait for the tempering time of the sample in the thermostat bath, depending on the application
type, 5…15 minutes
• Pumping the sample into the measuring sphere of the viscometer:
The liquid should be pumped to approx. 1 - 2 cm above the top measuring level.
For Ubbelohde viscometers, the feeder bulb (24) is located above the measuring bulb (25)
(see Fig. 2). This feeder bulb should be filled with liquid to at least half by the end of the
pumping process.
The pumping process must be ended in due time to prevent sample liquid from spilling out of
the viscometer!
Description of the handling:
Manually place the adapter (28) of the manual pump onto the silicone plug (8), either
(a) with pressure applied to the silicone plug (8D) above the filling tube (see Fig. 8)
Fig. 8 Pressure mode liquid handling with manual pump VZ 6550
The pressure mode is the standard procedure.
The manual pump VZ 6550 required for this is part of the delivery scope of the ViscoClock plus.
Do not pump the sample liquid into the measuring sphere using the manual pump after
pressing the start key! (16)! The installed ventilation valve of the ViscoClock plus is open. When using
Ubbelohde viscometers (with ventilation tube) and for pushing operation, the sample would be pumped
into the ViscoClock plus via the ventilation tube. This results in damage to the unit!
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