Portable X-ray Units
Service Manual
SM-1076R2
27
3.2.5 MANUAL CALIBRATION OF FILAMENT CURRENT (SMALL AND LARGE FOCAL SPOTS)
Perform this Manual Calibration only when the Autocalibration
process has not finished properly.
1. To enter Calibration of Filament current press and hold “Collimator
Light” push-button and then press and release “mAs Increase”
push-button (two beeps sound). (CAL iFiL) appear on the displays while
“Collimator Light” is pressed. Then release “Collimator Light”
push-button (the kVp Display shows 40, 80, 110 or 100 and the selected
Focal Spot Led blinks).
kVp
mAs
1
2
Press and hold Collimator Light
Press and release mAs Increase
Release Collimator Light
3
2. Select the corresponding Focal Spot. The Led blinks.
3. Select the corresponding kVp value where the Autocalibration stopped
(40, 80, 100 or 110 kVp) pressing “kVp Increase“ or “kVp Decrease”
push-buttons, and the corresponding mA Station where the
Autocalibration stopped by pressing the mAs push-buttons.
Values above 999 are shown on mAs display as “= XX”, a.e. “=23“
means 1023.
4. Make an exposure and measure kVp and mA signal values with the
Oscilloscope.
a. Verify that both signals are flat and noiseless.
b. If the mA value obtained is not the selected, increase or decrease
the filament current value (shown on the kVp Display) by pressing
“mA” or “s” push-buttons.
Note .
Note .
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