SECTION 6 : POST INSTALLATION CONFIRMATION
[ 1 ] CONFIRMATION OF POWER SUPPLY VOLTAGE
As specified in Electrical Requirements (page 5), power supply voltage must be within the
operable range
. (Rated
line
voltage ±10%)
.
Confirm the power supply voltage again before
turning on
the
unit.
1. Open the front panel of main controller by loosening two screws on top of the controller.
2. Set the range of digital multimeter at
3
00 VAC, connect probes of multimeter to L and N of the
3P terminal block.
Do not touch the restriction plate (refer to Fig.3-3) with the probes of multimeter during
measurement, or a short circuit occurs.
3. Confirm that the reading is
rated line voltage ±
10%
.
NOTE : PHOT-XIIs
505
x-ray can not be operated unless the power supply voltage is
within
this range.
WARNING
[ 2 ] CONFIRMATION OF TUBE POTENTIAL COMPENSATION VALUE
Tube potential is kept to be the constant and specified value by the feed-back control system.
Hight voltage is converted into low voltage feed back signal by the voltage divider. The precision
of tube potential depends on the accuracy of this voltage divider, although each divider has little
deviation. To compensate this deviation, we prepare the compensation value for each tube head.
Before making an exposure, check this value to be same as the value stored in the subcontroller.
1. Confirm the tube potential compensation (CP) values for 60kV and for 70kV written on the label
attached inside of the head yoke.
2. Turn on the main power switch. Keep depressing P(patient), C(cone) and kV selection switches
together until “CP. ” is displayed in exposure time window. This value is for 60kV and should
be the same value on the label. If displayed value is different, press Exposure Time Adjusting
Switches ( or ) and make the CP value to be same as the label and press patient switch to
store it
3. Press kV switch, then CP value for 70kV will be displayed. This value should be same as the
value for 70kV written on the label. If it is different, adjust displayed value by the Exposure
Time Adjusting Switches ( or ) and press patient switch to store it.
[ 3 ] MA
(
TUBE CURRENT
) ADJUSTMENT
PHOT-XIIs
505
x-ray incorporates self diagnose and adjusting system to check if the tube
current
are within specified ranges at the beginning of exposure.
1. Keep depressing tooth selection switches T1, T4 & T5 together until “h. ” is appeared on the
exposure time display window
2. Wait until the display changes to be “0.
50
”.
3. Make exposure by depressing the exposure switch.
X-radiation is generated for 0.
5
second.
4. Repeat step 2. and 3. until “Fin” is displayed. This self diagnose and adjustment is automatically
done for 3mA
and
6mA.
WARNING
24
Summary of Contents for PHOT-X IIs 505
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