Spellman LORAD LPX-200, Руководство оператора

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LPX-200
Industrial Imaging System
5-8
Chapter 5: LPX-200 X-ray System Operation
X-RAY TUBE SEASONING
It is normal in new tubes, or in tubes that have not been used
for extended periods, to have tube seasoning reactions during
use (OPERATE or AUTOWARM). These reactions are a
necessary part of the seasoning process in the tube, and can be
expected until the tube operates for at least 30 hours.
If seasoning reactions occur during AUTOWARM, x-ray
generation automatically stops, and the Message / Mode LCD
displays the error condition: ARC DETECTED - RESTART.
To clear the error, re-activate x-ray generation by pressing the
X-RAY ON control. The kV level will rise to 20kV below the
level where the reaction occurred and operate for 2 minutes.
After 2 minutes, the kV level rises to the next highest
incremental kV level on the selected AUTOWARM schedule,
then proceeds normally.
If the automatic reduction of kV reduces the kV level below
100kV, the Message / Mode LCD displays the error condition:
ARC SERVICE. When this occurs, switch the MAINS power
switch OFF, then back ON to restart the AUTOWARM
sequence.
Occasionally with a new tube, or with a tube that has been
dormant, reactions occur at kV levels below 100kV. This
prevents the kV level to rise to 100kV, and causes the ARC
SERVICE error message to show immediately after pressing
the X-RAY ON button.
When this occurs, press SCROLL to place the system in the
OPERATE : X-RAY READY mode, then set the system for an
exposure at 5.0mA, and 0kV. Press the X-RAY ON button
and increase the kV level - one kV per second - for 30 seconds
(to 30kV), and verify that the mA rises to 5.0mA. After 30
seconds of operation at 30kV, 5.0mA, advance the kV level in
10kV increments every 30 seconds to 100kV. Switch the
MAINS OFF, then back ON, then use the appropriate
AUTOWARM sequence to warm-up the x-ray tube to the level
for the exposure.