Ht Check; Exposure; Timing; Kvp-Meter - Siemens MULTIMOBIL 10 Troubleshooting Manual

1.7

HT Check :

Presence of High Tension
Observe Safety Precautions.
Use radiation protection
1.8

Exposure :

Switch the generator ON.
Set exposure parameters as 60Kv, 16 mAs.
Pull the recoilable exposure release switch and release an exposure.
The yellow LED on top panel lights up for a short duration equal to exposure time.
Audible indication by a Buzzer from the control and muffled sound from inverter
confirms the working of the inverter.
The LED's on D915 light in the following sequence:
S27 - STEP 1(half press)
Exposure state
In case of code
Code corresponding to the code is displayed on the seven-segment display.
Sharps knocking sound from inverter indicates inverter short circuit, resulting in
code display on the top panel.
1.9

Timing :

Set 60 kV 16mAs
Release an exposure. The radiation indication LED will light for 100msec ± 5msec.
1.10 KVp,KVn &KV Measurement :
The kVp, KVn & KV measurement can be carried out either by kVp-meter or by
electrical measurement.

1.10.1 kVp-meter :

Switch the unit ON.
Insert the kV sensor into collimator channel and connect the cable to the meter.
Open collimator flaps such that the sensor is well covered by the field.
Set the kVp meter at 12pulse and 55-85kV ranges.
Set exposure parameters as 60kV 20mAs.
Release an exposure. The radiation LED will light up during exposure.
The meter will read 57-63kV.
Repeat with meter setting 77-150kV and exposure parameter setting, as 90kV
20mAs.The meter will read 85.5-94.5 kV.
Siemens Ltd. Med Division India
: V22
: V23
: V24
Version 4.0
Service Manual
Service Instructions
Page 6 of 48