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
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