GE Healthcare Senographe DS
Revision 1 Service Information and Procedures Class A 2385072-16-8EN
Job Card CAL A001 - Heater Current Scale Factor
Page no. 1651 Chapter 9
JC-CAL-A-001.fm
L = track 1 (Mo) filament supply
S = track 2 (Rh) filament supply
C = filament supply return and X-ray tube cathode HV
G = focal bias voltage supply
7. Switch on the Senographe.
Note:
ERROR 007/024 is normal with 400 PL1 XJ7 disconnected.
6-2 Perform the calibration procedure for the desired X-ray tube track.
When you follow the procedure in section 6-2-2, Perform the Calibration Procedure on page 1651, you
must take into account the corrections described in section 6-2-1, Measurement Correction on page
1651.
6-2-1 Measurement Correction
• If you use a Fluke 87 first generation or a Fluke 87 type III, you must directly use the value measured
by the tool. Do NOT apply any correction.
• If you use a Fluke 87 type 5, you must add the following offset value to the value read on the Fluke.
The following example illustrates the described solution:
• For 4A measurement, if the value read at Fluke is equal to 3.85A, add 0.18. So, the final value is
4.03A.
• For 5A measurement, if the value read at Fluke is equal to 4.85A, add 0.2. So, the final value is
5.05A.
Note:
Correction factors are recommended by FLUKE in their datasheet in the case of Non-sinusoidal
waveforms. These correction factors have been obtained statistically by Engineering by comparing
correct measurement (from 87 III, scope and other accurate millimeters) with 87 V.
They are required because the measured signal is not sinusoidal. The signal is discontinued
20A Pulsed. The Fluke 87 V is not able to retrieve the proper RMS value with the Senographe DS
Ampere waveform.
6-2-2 Perform the Calibration Procedure
1. Select SETUP/GENE/INSTAL/GENE/GENE/HTR_SCL/TRACK1 (or TRACK2) /CALIB/1st pt/
CALIB on the X-ray Console for the first calibration point.
Note:
The default filament current command value for this first point is +4.000E+00 (4.0) A.
2. Press the Exposure button on the X-ray Console (no X-rays are produced) and hold it until the
multimeter reading stabilizes (this may take a few seconds).
3. Note the filament current value measured from the multimeter.
4. If it is required to apply a correction to the measured value, follow the instructions given in section 6-
2-1, Measurement Correction on page 1651.
5. Release the Exposure button .
If the measurement taken at Add the following offset value
4A 0.18
5A 0.2
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