GE Senographe DS Manual page 1650

GE Healthcare
Revision 1
Job Card CAL A001 - Heater Current Scale Factor
6-1 Preparation
1. Turn the Senographe OFF.
2. Open the HV converter control signal inputs by disconnecting flat cable WG8 from generator com-
mand board 400-PL1 connector XJ7. This eliminates any possibility of energy build-up in the HV unit
during this calibration procedure.
3. Disconnect the Senographe HV cable at the HV tank end.
4. Connect the HV cable to the HV unit HV cable adaptor (36003399).
5. Connect the HV unit HV cable adaptor to the Senographe HV tank.
6. Connect the multimeter (running in true RMS AC ammeter mode) in series with the filament being
calibrated on the HV unit/cable adaptor; and place a jumper on the other track (see illustrations 1 and
2).
Note:
1. See "important note" in section 2 to ensure an accurate measurement.
2. Keep the other filament connected in order to avoid error messages when the Senographe is
switched on.
ILLUSTRATION 1 - HV UNIT HV CABLE ADAPTOR 36003399
From HV tank
-HT
TRACK 2 (Rh)
TRACK 1 (Mo)
BIAS
Ground (+HV)
Note:
For safety reasons, -HT is permanently connected to ground
ILLUSTRATION 2 - HV CABLE CONNECTOR PIN CONNECTION DIAGRAM
NOTE: THIS IS A HEAD-ON VIEW
OF THE HV CABLE CONNECTOR
AFTER BEING DISCONNECTED
FROM THE HV UNIT.
The HV cable connector is marked with the standard X-ray industry markings (L, S, C, and G). However,
the functions of the corresponding conductors in the Senographe are as follows:
Chapter 9
Service Information and Procedures Class A 2385072-16-8EN
Track 2 (Rh): jumper or ammeter
C
L S
G
C G
Bias measurement
Track 1 (Mo): jumper or ammeter
POLARIZING TAB
Page no. 1650
HV cable
shield
C
L
S
G
L
G
S
Senographe DS
To X Ray tube
-HT
TRACK 2 (Rh)
TRACK 1 (Mo)
BIAS
Ground (+HV)
C
JC-CAL-A-001.fm