Sedecal SPL-HF 2.0, Service Manual

Page: 27 / 222

Portable X-ray Units
Service Manual
SM-1076R2 17
SECTION 3 CALIBRATION
Calibration procedures should only be performed at field if
Portable Control Board, Control Driver Board or the High
Voltage Transformer are replaced or the EEPROM memory is
re-initialized.
The Calibration process is as follows:
CALIBRATION PROCESS
STEP ACTION COMMENTS
1
Connection of the Oscilloscope for kVp and mA
measurements.
for kVp: 1 V = 30 kV
for mA: 1 V = 10 mA
(
Refer to Section 3.1 )
2 Preliminary calibration of Filament Current.
Minimum mA station in Large Focus at 40 kVp and 80 kVp.
(
Refer to Section 3.2.1).
3 Calibration of kVp Gain. P01 ( Refer to Section 3.2.2).
4 Calibration of mA Gain. P02 ( Refer to Section 3.2.3).
5 Autocalibration.
If the Autocalibration process is done properly, the
Calibration is finished. If not, perform the Manual
Calibration of the Filament Current (step 6).
(
Refer to Section 3.2.4).
6 Manual Calibration of Filament Current.
To be performed only when the Autocalibration did not work
properly.
All mA stations in Small Focus and Large Focus at 80 kVp,
40 kVp and 110 kVp (or 100 kVp).
(
Refer to Section 3.2.5).
The kV values to be selected in Calibration Mode are: 40, 80, 100
and 110 kVp depending on the maximum kVp of the Unit.
Note
.