• Created by Unknown User (pm7fm), last modified on Jul 23, 2018

General

If the EIO is to be stored for an extended period of time, it should first be inspected and operated when initially received. It is also recommended that the EIO be taken out of storage once per year and operated.

Preferred storage conditions are a vibration free and stable, clean, dry atmosphere at room temperature. It is recommended that whenever the EIO is not in use, the waveguide flange is covered, the high voltage lead wires are dressed to avoid strain, and the cooling tubes are dried.

Yearly operation of the EIO should consist of the following procedure:

  1. A visual inspection, looking for damage; corrosion; shrinking or cracking of any silicone rubber, ferrous material build up around the permanent magnets.
  2. Install the EIO onto a test set consisting of a power supply, a cooling system, and RF load for the EIO.
  3. Verify that all the cooling interlocks are functioning before operating the EIO. 
  4. Turn on the heater power for a minimum of five minutes and a maximum of 15 minutes before applying high voltages. An EIO with extremely poor vacuum will exhibit significantly increased heater current at the operating heater voltage after a warm up period. If the heater current remains higher than the value on the Test Data Sheet after the warm up period, then the EIO is faulty. Do not proceed any further and contact CPI.
  5. Turn the beam power supply ON and set the beam voltage to the value specified for the desired frequency of operation on the Test Data Sheet.
  6. Switch the anode power supply ON and slowly increase the anode voltage to the value specified on the Test Data Sheet.
  7. Adjust the tuner until the EIO oscillates at the desired frequency. Operate the equipment for a minimum of one hour under these conditions.
  8. Compare the resultant beam current, body current, and output power against the values recorded on the Test Data Sheet. If after one hour the beam current differs by more than 5% from the Test Data Sheet, or the body current differs by more than 20% from the Test Data Sheet, Contact CPI.
  9. If no significant variation in currents are noted, return the EIO to storage. Ensure the RF flange is covered, the cooling pipes are cleared and dried out and the EIO, in particular the high voltage leads, are protected from damage.
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