Sedecal SPL-HF 2.0, Service Manual

Page: 172 / 222

Portable X-ray Units
Service Manual
SM-1076R2
162
7. kVp Test:
G
Place a Non-Invasive kVp Meter aligned to the X-ray beam at SID
100 cm to measure kVp. Open the light field to center it with the
kVp Meter.
G
Select 80 kVp and the lowest mA station in Large Focus. Make an
exposure and note the kVp read on the Non-invasive kVp Meter
at the end of the exposure.
G
Check that the kVp value read must be the selected on the Control
Panel: 80
±
(3% +1 kVp). If the kVp value does not comply with
it, perform the respective Calibration procedures ( refer to
Section 3 ).
8. mA Test:
G
Select 80 kVp, Small Focus and the highest mA station in Small
Focus (read the mA station on the Control Panel by pressing any
“
Focal Spot ” and “ mAs Decrease ” push-buttons at the same time).
Make an exposure and measure the mA signal value with the
Oscilloscope. Verify that the signal is flat and noiseless.
G
Select 80 kVp, Large Focus and the lowest mA station in Large
Focus (read the mA station on the Control Panel by pressing any
“
Focal Spot ” and “ mAs Decrease ” push-buttons at the same time).
Make an exposure and measure the mA signal value with the
Oscilloscope. Verify that the signal is flat and noiseless.
G
Check that the mA values read must be the selected on the Control
Panel
±(
4% + 1 mA). If any mA value does not comply with it,
perform the respective Calibration procedures ( refer to Section 3 ).
9. Turn the Unit OFF. Disconnect the Oscilloscope and re-install the Upper
Cover of the Unit.
6.7 ALIGNMENT OF THE X-RAY BEAM AND FIELD SIZE INDICATOR TEST
Check the “ Alignment of the X-ray Beam ” and the “ Field Size Indicator Test ” as
described in Section 4.