Electrical; Ma/Mas Measurement; Mas-Meter; Calibration - Siemens MULTIMOBIL 10 Troubleshooting Manual

Service Manual
Service Instructions

1.10.2 Electrical :

Connect oscilloscope at D915.TP.kV.
Set the exposure parameters as 60kV 16mAs.
Release an exposure.
The recorded waveform will read 2.9V - 3.1V.
Repeat with 100kV 10mAs.
The recorded waveform will read 5V +/-0.25V.
Lower kV indicates code in kVsoll / kV sensing / kV-regulator OR high mA.
Higher kV indicates code in kVsoll / kV sensing / kV regulator.

1.11 mA/mAs Measurement :

mAs measurement could be carried out either by mAs-meter or by electrical
measurement.

1.11.1 mAs-meter :

Remove mAs link on D800 PCB on the Single tank.
Insert mAs-meter leads in the banana sockets mA+ and mA- on D800.
Set meter at, 200mAs and in the mAs mode.
Set exposure parameters as 60kV 32mAs.
Release an exposure.
The meter will read 31 – 33 mAs.
Repeat for exposure parameters 100kV 40mAs.
The meter will read 39 to 41mAs.
1.11.2 Electrical :
Connect oscilloscope at D915.TP.JR.
Set exposure parameters 60kV 16mAs.
Release an exposure.
The recorded waveform will read 3 – 3. 2V.
The exposure time will be 95 - 105mS.
Lower mA indicates code in mAsoll / mA sensing / mA regulator circuit.
Higher mA indicates code in mAsoll / mA sensing / mA regulator or Low kV.
Incorrect mAs indicate code in timer circuitry.

1.12 Calibration :

It is advisable to re-calibrate the unit in case of undershoot or overshoot observed in
the mA wave shape.
Recalibration is required when the single tank is replaced.
Siemens Ltd. Med Division India Version 4.0 Page 7 of 48