105446 06  23-03-2009  71 
 
Warning  
REMEMBER to wear goggles when using compressed air 
and cleaning oil.  
 
If the calibrator has reached a temperature below 0°C/32°F, ice 
crystals may form on the well. This, in turn, may cause verdigris to 
form on the material. 
To prevent this from happening, the well must be dried. This is 
done by heating up the calibrator to min. 100°C/212°F and any 
water left will evaporate. 
Remove the insulation plug while heating up. 
It is very important that humidity in the well is removed to prevent 
corrosion and frost expansion damages. 
 
 The stirring magnet and sensor basket (ATC-140/250 A/B 
only) – When removed from the calibrator the items must be 
cleaned thoroughly with dry disposable paper towels to avoid 
spilling of fluid. Drops of silicone oil can be removed using a 
special cleaning oil. 
 
 The sensor-under-test (ATC-140/250 A/B only) - When removed 
from the calibrator the sensor must be cleaned thoroughly with dry 
disposable paper towels to avoid spilling of fluid.  Drops of silicone 
oil can be removed using a special cleaning oil. 
 
 
Caution… 
Avoid getting silicone oil on the clothes. It is impossible to 
wash off. 
 
 The filtered air intake (ATC-125 A/B only) – The dust filter, 
located in the bottom of the instrument, must be changed when it 
is fouled up.