Siemens SIREMOBIL Iso-C Troubleshooting Manual page 147

Supplement: measuring the tube current
8-
8Supplement: measuring the tube current
NOTE
Switch off SIREMOBIL.
Remove jumper X97 from board D1.
Connect the mA measuring device at D1.X39 and D1.X40.
Switch on SIREMOBIL.
X
Release radiation and read the overall current.
Read out the kV value produced while the current is being measured.
Calculate the tube current as follows:
e.g.:
At 110 kV, an overall current of 5.275 mA is measured.
© Siemens, 2008
For internal use only
When measuring the tube current, the distribution current
must be derived from the measured value. The distribution
current depends upon the kV and is calculated according to
Ohm's law. The distribution resistance is 400 MOhm.
SPR2-230.840.01.01.02
08.08
Page 147 of 148
CS PS SP
147
SIREMOBIL Iso-C