Siemens MOBILETT Plus Manual page 52

17 - 2
The actual cooling curve is somewhat steeper than the calculated one.
If, following the last exposure, the calculated anode-plate heat energy is larger than 67 %
of the permissible thermal loading in HU, a new exposure is not allowed. Then the green
"ready" LED on the Control and display panel is turned on again, allowing a new expo-
sure, only after the calculated anode-plate heat energy is again below the limiting value of
67%.
This ensures that the thermal loading will never exceed 80%.
A special algorithm in the microprocessor software ensures that:
1.
2.
NOTICE
MOBILETT Plus/ Plus E
the maximum anode-plate heat energy can never become larger than 67 % of the
permissible thermal loading in HU + the maximum increase in thermal loading
from an exposure and
the mean X-ray tube power can not exceed 73 W during one hour.
To be able to calculate the cooling curve, the
MOBILETT must be switched on.
This means that if the MOBILETT, during the day has
been used for a large numbers of exposures, the oper-
ator must leave the device turned on for 10 to 20 min-
utes so that the HU-memory can be emptied.
Register 6
Tube-loading calculation
SPR8-215.850.02
Rev. 01 01.02
Page 2 of 2 Siemens-Elema AB
SPS-UD Solna, Sweden