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SEASONING SUGGESTIONS
After checking electrical standard controls, connections, filament supply, cooling etc., we recommend the following procedure:
- start with 1/3 of the maximum kV: 5 minutes
- each 10 kV up to 50 % of max kV: 5 minutes
- from 50 % to 75 % of max kV: each 10 kV step 10 minutes
- from 75 % up to 100 %: each 10 kV step 15 minutes
- at maximum kV: 30 minutes
The tube current should be about 50 % (of max.) until the final 30 minutes. Then at maximum values.
IMPORTANT
As described in our
“tube talk” the formation of glass metallization may lead to some reactions inside the tube. They are necessary and lead to a safe long term operation.
Sometimes it might be necessary to lower the kV in order
to stabilize the tube operation after reactions. In some cases it might help to pass the critical point by increasing the kV. Experience and responsibility are always required of the operator who handles the new
tube.
TUBE OPERATION AFTER LYING IDLE
For the seasoning (and re-seasoning after one year): start with 1/3 of the maximum kV and run 5 minutes, then raise in steps of 10 kV each 5 minutes, run full kV
until possible reactions disappear, always lower kV one step if discharges occur.
The tube current should be 50% of the maximum until final full kV operation.
For re- seasoning after three-to-six
months of laying idle: start from 70 kV and raise in steps of 10 kV every 30 seconds.
For re- seasoning after six-to-twelve months of laying idle: start from 70 kV and raise in steps of 10 kV every 60 seconds.
IMPORTANT
If the tube is isolated by transformer oil it is very important for the tube's life that the oil in the tube head is uniformly warm in the whole
tube head (about 50 degrees C) before the tube can be operated at its maximum.
Gas SF is homogeneous at normal temperatures and a fast operation even at maximum levels is possible.
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