Protective Devices - GE ERESCO MF4 Series Operating Manual

5

Protective Devices

1. When the following messages appear
2. Due to sporadic gas eruptions in the the X-ray tube and extremely high mains voltage
3. The yellow high voltage lamp i located on the front of the control unit, the red warning
Copyright by GE Sensing & Inspection Technologies GmbH
56
Operating Manual ERESCO MF4 Type Series
67: Temperature ERESCO control (70°C)
80: Temperature supervision power module (80°C)
105: Overtemperature generator (70°C)
the high voltage cannot be switched on until the temperature has fallen below the
critical level.
The tap symbol on the display flashes until the messages disappear. Press the CL key
to acknowledge a message.
Basically, heating up the radiating unit depends on the ambient temperature, the
pre-selected high voltage and the working position of the radiating unit. Due to the
complicated interdependence of these three factors, no general statement can be
made about a possible relationship between the operating time and non-operating
time. With an outside temperature of approx. 30° C and the maximum high voltage, a
working rhythm of
75% exposure time: 25% non-operating time
is generally possible.
fluctuations, the tube current can temporarily reach extremely high values which cannot
always be regulated via an automatic current control.
In this case, the overcurrent cut-off responds and immediately interrupts the high
voltage supply to protect the X-ray tube against consequential damages.
A restart is only possible after the cascade has been discharged (approx. 1 - 2
min).
blinker light on the radiating unit and the optionally connectable warning flash light
are all fail-safe lamps.
To test the fail-safe operation of the optional warning flash light, press the button on
the bottom of lamp. The high voltage should then be switched off and the message
Flash lamp faulty must appear on the display.
In case of short circuiting or interruption of the lamp circuit, the high voltage cannot be
switched on via the X-RAY ON button and thus no X-ray radiation can be generated.
The following messages appear:
53: High voltage lamp defective for the yellow high voltage light i
104: Warning lamp failed for the red warning light on the radiating unit
87: Flash lamp faulty for the optional warning flash light.
After eliminating the faults, press the CL key to confirm the messages.
(If one of the warning lights fails during operation, the high voltage is immediately
switched off and the messages described above appear)
62: Overtemperatur anode (110°C)
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08/24/2016
6. Edition, ID No.: 37020GB-F