Transportation & Storage Environmental Condition:Temperature: -15℃～70℃ Relative Humidity: ≤80% Atmospheric Pressure: 50～106 kPa

1. Matters Needing Attention for Adjustment

1）Check the high voltage generator that provides the component part with power supply to see if it generates centre earthing single-phase or three phase full-wave switching high voltage supply

2）Make sure to switch off the beam machine or lay effective cover-device at the ray window of the component part in order to avoid damage caused by X-ray radiation during adjustment.

3）Make sure the power supply for the filament and stator complies with the index of them.

4）Check if the time relay and testing devices such as meters possess adequate precision.

5）No load of cold high (no tube circuit)

6）Adjust the filament circuit as carefully as possible to the proper tube circuit to prevent the filament from being burnt. The filament circuit should be kept below 5.5 A of all times.

2. Treatment before the first operation

The operation should follow the following procedures if the component part is operated for the first time or deposited for over a month before re-use.

1）With the tube circuit kept 2mA, increasing the tube voltage gradually from 50 KV to the rated voltage （125kV）at a speed of less than 10kV/min and keeping it at the rated voltage for 3 minutes.

2）Rest the component part for 5minutes after unloading.

3）According to the load characteristic diagram (diagram 2), the tube circuit should be half of the corresponding circuit of the tube voltage. The exposure intermittence time should be 0.1 second. From 60 KV, expose once or twice every 0.1 second then increase the voltage by 10 KV and continue to expose till the voltage gets 125 KV. (Pay attention to check if the X-ray tube works normally) The time between two exposures shouldn’t be less than 1 minute so as to cool the component part.

3. Operating Maintenance

Before using the component part, make sure the following operations are completed.

1）With the tube circuit kept 2mA, increasing the tube voltage gradually from 50 KV to the rated voltage （125kV）at a speed of less than 10kV/min and keeping it at the rated voltage for 3 minutes. (The rated tube voltage should be reduced properly after approximately half a year’s use.)

2）Rest the component part for 5minutes after unloading.

3）According to the load characteristic diagram (diagram 2), the tube circuit should be half of the corresponding circuit of the tube voltage. The exposure intermittence time should be 0.1 second. From 80 KV, expose once every 0.1 second then increase the voltage by 10 KV and continue to expose till the voltage gets 125 KV. (Pay attention to check if the X-ray tube works normally) The time between two exposures shouldn’t be less than 1 minute so as to cool the component part.

4.During adjustment, stop loading and get the component fully cooling when the tube wall temperature is too high （70℃）. If the temperature controlling switch is used, it will be switched on when the temperature of the component is too high and cut off the tube voltage

5.Clean the surface of the component with absolute alcohol and maintain the component part periodically. Replace the insulating oil in the interface of the high voltage cable. Check earthing and temperature switch and make sure there is no leakage in the body case of the component part.