33
08/24/2016
6. Edition, ID No.: 37020GB-F
Operating Manual ERESCO MF4 Type Series
Copyright by GE Sensing & Inspection Technologies GmbH Bogenstrasse 41 D - 22926 Ahrensburg
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.
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:
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.
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
key.
NOTE:
Operational readiness for switching on the radiation is always displayed
via the green illuminated X-RAY ON button.
