VPAD Manual
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Temperature range of circulation jacket and thermostatic flow conditions:
Permitted temperature range: -10 a +100°C (14 a 212 °F)
Use a thermostatic bath with demineralised water or refrigeration special liquid. Change the liquid
form the thermostatic bath regularly. Recommended flow: 15 l/min.
Materials:
The metallic parts are made of stainless steel; the lids are made of plastic in Delrin. The parts in contact
with the sample (sample container and spindle) are made of AISI 316 suitable for food industry.
The lid inferior washer is made in black Delrin. It is designed to get a maximum temperature of 100ºC (212
ºF)
The circulation jacket is made of acetal and Delrin.
The O-ring on the plastic stopper (M) of the APM Adapter is made of Delrin.
The softening point is 110 °C (230 °F).
11.3 HELDAL UNIT – Helicoidally Movement Unit
NOTICE:
The Heldal adapter it’s not included in the standard delivery. It can be ordered as an accessory. The unit is
supplied complete with T-shaped spindles, in this case.
The Heldal accessory is used with substances that do not flow by themselves (like ice or pastas). It’s motor
moves the viscometer slowly in a vertical movement and at the same time the spindle makes the rotation
movement. This generates a helicoidally movement so the T-shaped spindle is always in contact with the
sample.
The measurements obtained with Heldal do not measure absolute viscosity! They are only comparative
measurements with the same geometry as T-shaped spindles.
Fig. 16 Heldal Unit in its case
