Heidolph Heat-On - Manual (Page 7)

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Important, Important,
Important, Important,
Important, Important,
Important, Important,
Important, Important,
Important, Important,
Important, Important,
Page 6
Set-Up
- continued
Heat-On Instructions
Using a separate temperature controller
For accurate temperature control of your block and/or solution temperature we recommend
using a temperature controller such as the (509-88000-00) Hei-con temperature sensor V2A.
All Heat-On blocks feature a hole (3.5mm ID) for inserting a temperature probe.
Warning
Temperature controller wire/cable should not come into contact with the Heat-
On Block. Always rotate the block to ensure that the probe hole is nearest to
the probe socket on the stirring hotplate.
Important Note
Please note that typically temperature controllers should be set between
5˚C and 15˚C above the boiling point of the solvent to achieve a gentle reflux.
Optimising the stirring performance of your Heat-On
The Heat-On system uses the magnetic field of the stirring hotplate to stir your sample. The Heat-On blocks have been optimised to work
with leading brands of stirring hotplates with a top plate diameter of up to 145mm.
The stirring performance of Heat-On will be affected by:
1. The limit of the maximum stirring speed of the stirring hotplate.
2. Power and size of the magnet within the stirring hotplate.
3. Selection of an appropriate magnetic stirring bar for your chosen flask
4. Viscosity of sample.
Wide choice of magnetic stirring bars
The selection of an appropriate magnetic stirring bar for your chosen flask is key to the
performance of stirring within the Heat-On block.
Heidolph-Heat-On Instructions 23-03-09:2nd draft amends 16-03-09 23/3/09 15:37 Page 7