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
from the thermostatic bath regularly. Recommended flow: 15 l/min.
Materials:
The metallic parts are made of stainless steel; the lids are made of Delrin plastic. 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).
12.3 HELDAL UNIT – Helicoidal Movement Unit
NOTE:
The Heldal adapter doesn’t come with the standard delivery. It can be ordered as an accessory. The unit is
completely supplied with T-shaped spindles, in this case.
The Heldal accessory is used with substances that do not flow by themselves (like ice or pastas). The engine
moves the viscometer slowly in a vertical movement and at the same time the spindle makes the rotation
movement. This generates a helicoidal movement that makes that 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. 15 Heldal Unit in its case
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