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  The oil level rises several centimetres when the 
temperature is rising. To stop overflow switch off the 
main power and the oil level will decrease. 
 Carefully wipe off all silicone oil from the sensor under 
test to avoid spreading of the silicone oil. 
 Be careful to select the right oil for the right task. Using 
other than the recommended oils might cause damage 
to the calibrator or degrade the performance. 
 Remove excess hot fluid with the outmost care, as it 
might be very hot. 
 Do not attempt to remove hot fluid with the liquid 
drainage tube, as it might melt. 
About the well, insertion tube and sensor: 
 The well and the insertion tube must be clean and dry 
before use. 
 Do not use any alkali, acid or ionic fluids in the 
aluminium well as it might be damaged. 
 Scratches and other damage to the insertion tubes 
should be avoided by storing the insertion tubes 
carefully when not in use. 
 The insertion tube must never be forced into the well. 
The well could be damaged as a result, and the 
insertion tube may get stuck. 
 Before using new insertion tubes for the calibration, the 
insertion tubes must be heated up to maximum 
temperature – 250°C (482°F) / 320°C (608°F) / 650°C 
(1202°F) - for a period of minimum 30 minutes (ATC-
250/320/650 A/B only). 
 The insertion tube must always be removed from the 
calibrator after use. 
  The humidity in the air may cause corrosion oxidation 
on the insertion tube inside the instrument. There is a 
risk that the insertion tube may get stuck if this is 
allowed to happen. 
 If the calibrator is to be transported, the insertion tube 
must be removed to avoid damage to the instrument.