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1.4 Measuring with oscilloscope
For normal working, the protective earthing of mains must not be removed.
In case system noise is getting coupled to the scope, use the scope in differential
mode.
To measure high voltage use DIFFERENTIAL probe isolated from ground.
1.5 Handling precautions
WARNING
1.6 Mechanical Safety
Due to the manoeuvrability of the system, the collision probability of the image
intensifier and the single tank with the patient or the table is greatly increased if
adequate care is not taken.
While moving various parts of the unit with hand, use of handgrips and handles is
recommended. The figure shows location where there is a danger of crushing for
patient or user due to parts moving relative to each other.
Siemens Ltd. Med India
1. Strictly observe ESD precautions while
handling PCBs and ESD sensitive devices.
2. After the unit is switched on, the capacitors
charge to 300VDC. (Approx) After switching
the unit OFF, it takes about 4 minutes for
capacitors to discharge. Green LED on D61
indicates the presence of DC voltage.
3. Lead is used for radiation protection inside the
single tank. The collimator flaps are made of
lead. Lead rings are used on the Image
intensifier for counter balancing. Lead is used
inside the C-arm profile for counter balancing.
Hence, special precautions should be
observed during handling these parts to avoid
lead poisoning and contamination.
4. If the Temperature of the single tank exceeds
65°C, then the Temperature. Sensor (switch)
operates and D915 blocks the firing pulses to
the inverter. This overload protection will
automatically again switching ON after the
temperature of single tank goes below the
threshold level (65°C) of the thermal switch
which is indicated by the thermometer symbol
on the top panel. Cool-down periods are
recommended if used extensively.
Version 5.0
Copyright © SIEMENS LTD. All rights reserved. For internal use only
Service Instructions
Multimobil 5C
Page 6 of 73
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Troubleshooting
