MTE HYDROCAL1005 - Page 12

HYDROCAL 1005 Manual for Installation and Operation Page 10/111
Attention!!!
The following steps must be done according to the company procedures.
Work carefully in order to prevent air entering into the transformer. Use a
bucket to catch oil coming out as described on following drawing.
 Unscrew the aeration screw 3 – 4 turns with Allen key No. 4. (Aeration is active).
 Open the valve slowly until oil comes of the sample tube.
 As soon as no air bubbles sort on the sample tube, close the aeration screw. Then fully open the
valve. Remove the oil from the measuring head externally.
Do not use any solvents for cleaning!