HF Series Generators
Maintenance
MA-1004R4
11
2.8 RADIOGRAPHIC PARAMETERS
With the generator power OFF, connect:
G Non-invasive kV Meter to measure kV.
G mAs Meter to the banana plug connections on the HV Transformer
to measure mA or mAs (connect the mAs Meter for Digital mA
Loops calibration).
Test points on the HT Controller PCB can also be used to monitor
the kV and mA readings but should not be used
to calibrate the
unit. These test points must be checked with scope. (Refer to
Calibration chapter -- Section 2 “Calibration Procedures”, for test
points and scale factors).
2.8.1 TEST FOR kV LOOP
1. Verify that dip switch 3000SW2-2 on the HT C ontroller Board is in “Off”
position (enables Filament and Rotor Interlocks).
2. Turn the Generator ON and select the “Direct”(No Bucky) workstation in
one of the X-ray Tubes.
3. Select 80 kV, 200 mA (or the first mA station for Large Focus), 100 ms.
Make an exposure and note the kV at the end of the exposure.
4. Check that the kV value read on the kV Meter must be 80 ±1 kV.
If the kV value does not comply with the above value, perform the
respective Calibration procedures.
Note .
To Next Page
Loading...