Phantom Installation, Operation & Service Manual
Calibration 5-7
5
Make another exposure and note the measured mA. Re-adjust if
necessary and repeat step 4
6
If the filament pre-heat requires calibration and the leading edge of
the waveform on channel 2 is low, add to the waveform by adjusting
R12 (located on the High Voltage control PCB #500978) counter
clockwise. If the leading edge is high, subtract from the waveform by
adjusting R12 clockwise.
7
Make an exposure and verify change, repeat the above step if
necessary. There is an interaction between steps 6 and 7 to steps 1-5,
therefore, it is necessary to re-check one after adjusting the other.
5.2.5 Tube potential
To enter the kVp calibration mode, turn the control (main power switch)
off.
Depress the “TIME UP, “KVP’ UP end “RESET” buttons at the same time.
With all three buttons depressed turn the control unit ON. When the
displays illuminate hold all three buttons for an additional four seconds
until the displays go blank. When the displays go blank, release the button
combination.
After an additional four seconds the displays will illuminate with the
following information; 50 kVp, 1.25 mAs, and 5 seconds. The exposure
time in the calibration mode is pre-set at 0.1 seconds.
1
Make an exposure and store the wave shape. Compute the kVp by
counting the base line as 42 kVp and each division as 10 kVp.
2
Use the “UP” and “DOWN” arrow keys of the “TIME” adjust to
calibrate the kVp. If the output is high, then use “DOWN” key to
subtract from the kVp reference. If the output is low, then use the
“UP” key to add to the kVp reference. Each 0.5 increment of the
displayed time value is equal to 0.5 kVp for a total range of +/- 4.5
kVp.
3
Depress the “RESET” button to enter the change into the
microprocessor. The kVp meter will now display 60 kVp.
4
Repeat steps 1,2 and 3 for the 60 - 100 kVp range in 10 kVp increments.
5
Once all the calibration points are completed, the kVp display will
show 50 kVp and the other displays will be blank.
6
Recycle the power switch on the control unit. If any points need to be
fine tuned, re-enter the calibration mode and toggle through the
calibration points using the “RESET” button until the correct range is
found.
Содержание DynaRad Phantom-8000
Страница 6: ...Phantom Installation Operation and Service Manual 4...
Страница 24: ...Phantom Installation Operation Service Manual i 18 Applicable Standards...
Страница 26: ...Phantom Installation Operation Service Manual ii 2...
Страница 66: ...Phantom Installation Operation Service Manual 3 24 Folding Phantom...
Страница 74: ...Phantom Installation Operation Service Manual 4 8 Check tube head rotation friction lock...
Страница 84: ...Phantom Installation Operation Service Manual 5 10 Adjustments 5 3 Adjustments Not applicable for this product...
Страница 106: ...Phantom Installation Operation Service Manual 6 22 Release Cable Replacement...
Страница 116: ...Phantom Installation Operation Service Manual 8 2 Electrical Schematics...
Страница 117: ......
Страница 118: ......
Страница 119: ......
Страница 120: ......
Страница 121: ......
Страница 122: ......
Страница 123: ......
Страница 124: ......
Страница 125: ......
Страница 126: ......
Страница 127: ......
Страница 147: ...Phantom Installation Operation Service Manual 9 20 Control Chassis Assembly 501203...
Страница 148: ...Phantom Installation Operation Service Manual n 1 Notes...
Страница 149: ...Phantom Installation Operation Service Manual n 2 Notes...
Страница 150: ...Phantom Installation Operation Service Manual n 3 Notes...
Страница 151: ...Phantom Installation Operation Service Manual n 4 Notes...