Safety; Safety Precautions; Overload Protection; Radiation Protection - Siemens MULTIMOBIL 5C Troubleshooting Manual

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1 Safety

1.1 Safety Precautions

WARNING
WARNING

1.2 Overload Protection

The unit is designed to work on 110 / 190-240V, single phase, 15A socket. For safety
purposes 16A HRC fuses are provided which will blow when a current exceeding 16A
sustains for its response time.
WARNING
In case of fault if the kV tries to build beyond the safe limit of X-ray tube the protection
circuit blocks the HT.
In case of fault if the Filament current tries to increase beyond the safe limit the
protection circuit blocks filament boosting.
Maximum permissible resistance between the Earthing lead terminal in the control and
on the HT transformer shall not exceed 0.1 ohms.

1.3 Radiation Protection

WARNING
Siemens Ltd. Med India
Before opening / closing the covers ensure that the
mains is switched off and the plug is removed from
the socket.
Ensure that the protective earth connections of the
sub assemblies are properly connected.
Precaution should be observed while working on the
single tank. During continuos fluoroscopy, the
temperature of the oil in the single tank raise. The
thermal switch provided on the single tank cuts off
the radiation after the temperature is reached to
60+5°C. Hence the surface becomes hot and can
cause burns. Avoid contacting the surface of the
single tank at this instance.
Ensure that the mains socket is properly earthed.
• Do not put any part of your body in the direct line of
radiation. Collimate the X-ray beam.
• Keep maximum possible distances from the object
being radiographed. For this make the best use of 5
mtr of recoilable hand held exposure release switch.
• In the room, wear protective clothing (lead Apron).
• Monitor radiation received using the personal TLD-
badges or pen-dosimeter.
Version 5.0
Copyright © SIEMENS LTD. All rights reserved. For internal use only
Service Instructions
Multimobil 5C
Page 5 of 73

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