Sedecal SHF-310 - Test for Digital Ma Loop Closed; AEC Checks

HF Series Generators
Maintenance
MA-1004R4
13
2.8.3 TEST FOR DIGITAL mA LOOP CLOSED
1. Turn the Generator ON and select the “Direct”(No Bucky) workstation in
one of the X-ray Tubes.
2. Select the following parameters, make an exposure and note the mAs
values read on the mAs Meter.
G 80 kV, 100 ms, 50 mA.
G 80 kV, 100 ms, 200 mA.
3. Check that the mAs values read on the mAs Meter must be the same mAs
displayed on the Console with a tolerance of ±4% mAs.
4. If the mAs values do not comply with the above values, perform the
respective Auto-Calibration procedures.
5. Turn the Generator OFF.
2.9 AEC CHECKS
For AEC calibration, use the same Film and Cassettes used by the
customer. AEC calibration must be performed
using the Medium
Film/Screen speed combination. The Medium Film/Screen speed
has to be double of the Slow and half of the Fast (a.e. 200--Slow,
400-- Medium, 800--Fast).
When using C R (Computer Radiography) or DR (Digital
Radiography) instead of measuring Optical Density:
-- measure the Image Gray level by using the needed software
tools inside each application (refer CR or DR documentation).
-- or measure the Dose level:
-- For CR, placing the Dosimeter as close as possible to the
Cassette and centered with the Central Area of the Ion Chamber.
-- For DR, placing the Dosimeter as close as possible to the
Panel, centered with the Central Area of the Ion Chamber and with
the Grid removed.
Note .
Note .