GE Healthcare
Senographe DS
Revision 1
Service Information and Procedures Class A 2385072-16-8EN
Job Card CAL A009 - X-Ray Tube mA Measurement
Page no. 1665
Chapter 9
JC-CAL-A-009.fm
6-2
Perform the calibration procedure
1. Starting from application mode, select
SETUP/GENE/INSTAL/GENE/GENE/mA_meas/CALIB/
CALIB
on the X-ray Console. Press push button SW2 on generator kV/mA board 701-PL1 and
HOLD IT DOWN. Read and note down the value measured on the milliammeter. While still holding
SW2 down, select
MEASUR
on the X-ray Console (this request for a measurement of X-ray tube cur-
rent is needed by the calibration software, but the value displayed on the X-ray Console at this point
is of no importance to the service engineer). Release push button SW2.
2. Select
SETUP/I_MEAS
on the X-ray Console. Enter the value of current (in milliamperes) read from
the milliammeter by using the NEXT and VALID keys and rotating the kV dial. See Visual Display of
Parameter Values and Modification of a Parameter Value or Entry of a Measurement in Job Card
CFG "The X-ray Console".
Note:
Only values b4.000E+1 (40) and +6.000E+1 (60) mA are accepted by the calibration soft-
ware. An error message appears on the X-ray Console display if a value outside of this range is
entered.
3. Select
SETUP/CALCUL/VALID
on the X-ray Console to execute the calculation. If the calculated F/
mA value is between 850 and 1150 mA
calib END
appears on the X-ray Console display - if it is not,
then an error message appears.
6-3
Check results
1. Select
SETUP/CALIB
on the X-ray Console. Press push button SW2 on generator kV/mA board 701-
PL1 and HOLD IT DOWN. Read and note down the value measured on the milliammeter. While still
holding SW2 down, select
MEASUR
on the X-ray Console. Verify that the measurement on the X-ray
Console display now corresponds to the value read on the milliammeter ±400 µA ± milliammeter
error. Release push button SW2. DO NOT ENTER THIS MEASURED VALUE.
2. Change the milliammeter scale to 200 mA DC. Press push button SW1 on generator kV/mA board
701-PL1 and HOLD IT DOWN. Read and note down the value measured on the milliammeter (the
current should be approximately 120 mA). While still holding SW1 down, select
MEASUR
on the X-
ray Console. Verify that the difference between the measurement on the X-ray Console display and
the value read on the milliammeter is less than 2.4 mA. Release push button SW1. DO NOT ENTER
THIS MEASURED VALUE.
3. Select
SETUP/SETUP/PARAM
on the X-ray Console and note down the displayed value of F/mA.
4. Perform a checksum (
SETUP/SETUP/SETUP/SETUP/CKSUM/CKSUM
) and return to Application
mode.
5. Turn off the Senographe.
6. Disconnect the milliammeter and replace the strap between terminal lugs MES_M_NEG and
MES_M_POS of generator kV/mA board 701-PL1.
7
COMPLETION
If you are handing the machine back to the user at this point, switch the Senographe off, then on again.
