© SIKA • Ba_TP17-TPM-Multi_en.doc • 01/2014
4.4.4 Operating the magnetic stirrer
The best possible homogeneity is achieved by stirring the calibration liquid with the magnetic
stirrer.
Set the stirring speed to the respective max. speed. Turn the thumb wheel (Fig. 11) up-
wards to increase and downwards to decrease the stirring speed.
Liquid bath
Front of the controller with stirring speed wheel
Wearing part!
The magnetic stirrer is a wearing part.
Replace worn-out magnetic stirrers.
When using the multifunction calibrator remove the sensor cage after calibration. The ca-
libration liquid should be removed after use with the aid of the special bilge pump. Clean
the sensor cage and tank before putting any other insertion sleeves into the tank. This
will prevent the sleeves becoming jammed in the tank.
5 Commissioning
Before switching on the calibrator or the first time, please follow the instructions in the follow-
ing section.
Working surface:
The calibrator / micro calibration bath has to be placed in a vertical standing position for op-
eration, this position guarantees optimum temperature distribution in the metal block / liquid
bath.
5.1 Start-up procedure
If the calibrator is not used for a longer period, it is possible for moisture to enter the heating
elements due to the material used (magnesium oxide).
After calibrator transport or storage in a damp environment, the heating elements have to be
gently brought up to operating temperature. During the drying out procedure it has to be as-
sumed that the calibrator has not yet achieved the required insulation voltage for protection
class I.
The start-up set point is T
start
=120°C for a stop period of t
h
=15 min.
