Setting The Stirring Speed; Heating Without External Contact Thermometer - Heidolph MR Hei-Standard Instruction Manual

8

Setting the stirring speed

9

Heating without external contact thermometer

Use the control knob (C) to adjust the set temperature for the hotplate. The temperature
can range from room temperature to 300 °C according to the scale. The heater will be
activated when a temperature higher than 20 °C is set. The LED (D) is lit.
The LED (D) flashes when the heater is active.
Note:
The jumper plug (J) must be in place. The instrument will not heat
otherwise.
Notes on setting the hotplate temperature:
The contents of the mixing vessel will always have a lower temperature
than the set hotplate temperature due to differences in heat conductivity
of various mixing vessels, the volume of material to be heated, and heat
loss due to radiation.
As a rule of thumb, the hotplate temperature should be 1.5 to 4 times
that of the desired temperature of the medium.
The value should be increased according to the specific heat capacity,
volume and desired temperature of the medium.
Note
Note on heating time:
Higher hotplate temperatures will result in a shorter heat-up period.
Set the desired speed with the control
knob (B) according to the scale.
The motor will start when the speed is set
to 100 rpm or higher.
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E