Service Instructions
Multimobil 5C
Siemens Ltd. Med India
Version 5.0
Page 25 of 73
Copyright
©
SIEMENS LTD. All rights reserved. For internal use only
¾
Observe the voltage on C.R.O with the scale corresponding to 1V= 20 kV at
kVist, 1V= 30kV at kVsoll.
¾
The readings should be within
±
5% of the selected value.
¾
Repeat the measurement with the following parameters
1. 40kV 10mAs
2. 81kV 16mAs
3. 100kV 20mAs
5.3.4.2
Checking the tube current
¾
Connect oscilloscope to D915.TP.JRS & D915.TP.JR
¾
Turn the unit ON.
¾
Select radiography mode.
¾
Set parameters of 60kV 10mAs
¾
Trigger an exposure.
¾
Observe the voltage on C.R.O with the scale corresponding to 1V= 20mA.
¾
The readings should be within
±
5% of the value as per the exposure chart.
5.3.4.3
Checking the kV and tube current
¾
Connect oscilloscope to D915.TP.KV & D915.TP.JR
¾
Turn the unit ON.
¾
Select radiography mode
¾
Set any parameter combination
¾
Trigger an exposure.
¾
Observe the voltage on CRO (1V=20kV & 1V = 20mA) for selected kV & mAs.
¾
The readings should be
5.3.4.4
Checking the mAs values
¾
Turn the Unit OFF.
¾
Remove the Shorting Link “mAs +/-” on D506 PCB banana sockets.
¾
Connect mAs meter to “mAs +/ mAs-” on D506 PCB.
¾
Turn the Unit ON.
¾
Trigger an exposure with 40kV 200mAs.
¾
The mAs reading on the meter should be within
±
5% of the selected value.
¾
Repeat the measurement with the following parameters.
¾
52kV, 64mAs
¾
100kV, 2.5mAs