HF Series Generators
Maintenance
MA-1004R4
12
2.8.2 TEST FOR DIGITAL mA LOOP OPEN
1. Set the dip switch 3000SW2-4 on the HT Controller Board in “On”
position (Digital mA Loop Open / Filament Current Constant).
Only for Generators with LF-RAC (LSS):
-- When the mA Loop is open (dip switch 3000SW2-4 in “On”), the
rotor runs for two minutes after release the handswitch
push-button from “Preparation” position.
-- When the mA Loop is closed (dip switch 3000SW2-4 in “Off”),
the Tube will brake after release the handswitch push-button from
“Preparation” position.
2. Enter in Manual Calibration selecting the “Direct”(No Bucky) workstation
of the corresponding X-ray Tube.
3. Select 80 kV and the following mA stations. Make an exposure and note
the mAs values read on the mAs Meter.
G Minimum mA for Small Focal Spot.
G Maximum mA for Small Focal Spot.
G Minimum mA for Large Focal Spot.
G Maximum mA for Large Focal Spot.
4. Check that the mAs values read on the mAs Meter must be the same mAs
displayed on the Console with a tolerance of ±6% mAs.
If the mAs values do not comply with the above values, perform the
respective Auto-Calibration procedures.
5. Repeat this test for the second X-ray Tube.
6. Turn the Generator OFF and set the dip switch 3000SW2-4 on the HT
Controller Board in “Off” position (Digital mA Loop Closed).
Note .
To Next Page
Loading...