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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
1.2
Radiation Protection Information
Dear Customer:
You received equipment for X-ray generation from our company. It contains the radiating
unit with the built-in X-ray tube which constitutes the actual X-ray generating source.
Our company is legally obliged to point out to the customer those measures that serve
radiation protection. Therefore, we recommend the following steps to you.
1. Carefully read the Operating Manual, in particular the descriptions pertaining to
functions of the control units and display units.
2. Take advantage of equipment-specific protective devices, e.g. door switches and light
barriers that can guard off-limit areas.
3. Never choose a beam cone angle in excess of what is absolutely necessary for an
economical inspection. Not only is the operator’s radiation dose kept to a minimum
this way. The quality of the test results is improved as well.
In practical terms this means that the beam cone should always be restricted to the
film format or the fluorescent screen format by applying a beam limiting diaphragm
of a highly absorbent material such as lead in sufficient thickness. This diaphragm can
be either provided by the supplier or by the customer.
4. Frequently, the cheapest und most convenient radiation protection is achieved by
keeping the distance from the radiation source as large as possible. In case of mobile
X-ray units, make use of the full length of the connecting cable between the radiating
unit and the control.
All automated
GE Sensing & Inspection Technologies
controls render operator-guided
monitoring of the operating values unnecessary during radiation time. Therefore,
immediately after HV switch-on, the operator can further increase the distance from the
X-ray tubehousing or the radiating unit. The benefit of this measure is even enhanced
by a slow HV increase from zero to the preselected value within approximately five
seconds.
5. During film exposures, always cover the back of the film with an additional lead sheet.
The general radiation level is considerably lowered this way. The film is protected from
contrast-reducing scattered radiation.
6. Always remember that X-radiation is generated as long as the amber pilot light of the
control is on or flashing and the warning lamp is active.
7. Never forget to remove the key from the control during non-operational intervals. Keep
it in a safe place to prevent its use by unauthorized personnel.
8. Always exploit existent shielding facilities. Often structural features can be used to
great advantage.
