Starting Exposure - GE ERESCO MF4 Series Operating Manual

2.7

Starting Exposure

Once all the settings have been carried out and all the safety measures for the expo-
sure have been set according to section 1, the exposure can be started by pressing the
X-RAY ON button.
NOTE:
After the set prewarning time (0,2,3...250s), the control lamp i at the control unit and the
indicator lamp at the radiating unit start to flash. If the optional warning flash lamp is
connected, it will start to flash after pressing the X-RAY ON button.
CAUTION:
The high voltage is switched on and starting from a minimum value it slowly increases up
to the pre-selected nominal values, and the exposure time runs down.
The prewarning time can be switched off in the set-up menu under point 04 (page 43).
6 seconds prior to the end of the exposure time an acoustic signal sounds until the high
voltage is switched off.
Once the exposure time has expired, the high voltage will be purposefully reduced to zero
and switched off after a short reheat period to discharge the high voltage cascade.
If technical faults occur during operation, the unit will be switched off and the operator
will be receive a message explaining the reason for unit shut-down. After eliminating the
technical fault, the unit can be restarted.
The message disappears and the remaining exposure time runs down.
If the mains supply fails during exposure, the displayed actual-value of the exposure time
remains at the current value.
As soon as the power supply returns, exposure can be continued by pressing the
X-RAY ON button again. An exposure time error cannot occur.
When changing or switching on the high voltage, an automatic check determines whether
warm-up is necessary or not.
If necessary, the message 106: Warm-up necessary is displayed, and the warm-up program
is called after pressing the F4
Copyright by GE Sensing & Inspection Technologies GmbH
08/24/2016
6. Edition, ID No.: 37020GB-F
Operating Manual ERESCO MF4 Type Series
Operational readiness for switching on the radiation is always displayed
via the green illuminated X-RAY ON button.
With a connected warning flash lamp, an prewarning time of at least 2
seconds m u s t be set, otherwise the high voltage cannot be switched on.
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