Poskom PXP-40HF, Operation & Service Manual, Page: 28 / 37

Product Manual: PXP-40HF Poskom Co.,
Ltd.
The display indicates as follows.
kV mAs
Calibration code Calibration data
C01 is calibration code of tube current (40mA at 61kV~70kV).
153 is calibration data of tube current (40mA at 61kV~70kV).
-Adjust mA by the mAs up/down switch (see operation sheet).
-After it is adjusted, push the store switch (see operation sheet).
-DIP switch 1 on the PCB OP board is turned off then exposure X-ray.
-If it is not 6V, set the calibration data again.
-Table .1 shows the calibration code and the calibration data against an each tube current.
C. Filament preheat calibration
-This is preheating filament for making tube current.
-The overshoot or the undershoot may occur from the tube current if the preheat calibration data or
the VR3(preheat gain volume) is set by mistake.
-There are two methods to make preheat calibration setting. The calibration data is possible to be
changed in accordance with the tube condition.
-The VR3(preheat gain volume) adjusts the whole range of tube current. Filament preheat
calibration data adjusts each tube current.
kV
mAs
-Turn off the line switch.
-Lift up the control panel from the unit, and then the PCB OP Board appears.
-DIP switch 1 on the PCB OP board is turned on.
-Turn on the line switch.
-Push APR switch
①
and then the display indicates as follows.
Preheat calibration code Preheat calibration data
P00 is Filament preheat calibration code (Preheat calibration code of 60mA).
17 is Filament preheat calibration data (Preheat calibration data of 60mA).
-Adjust data by the mAs up/down switch (see operation sheet).
-After it is adjusted, push the store switch (see operation sheet).
-DIP switch 1 on the PCB OP board is turned off then exposure X-ray.
If overshoot or undershoot occur in the waveform, set the calibration data again.
Then push the kV up switch (see operation sheet).
The display indicates as follows.
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