Dhhs - Statements - Siemens PORTARAY HELIODENT 70 Maintenance Instruction

— 66 —
1020.30 (h) (3) (i)
Rated nominal line voltage
Permissible maximum line-voltage
regulation at terminal strip K3
Line voltage range
Maximum line current at the nominal
values of
70k Vand 7DCmA
1020.30 (h) (3) (v)
Generator duty cycle at the nominal
values of 70 kV/ 7 DCmA
Rest minimum
20 sec. between two exposures
1020.30 (h) (3) (vi)
Maximum deviation from indicated values
a. peak tube potential nominal 70 kV
b. tube current nominal 7 DCmA
c. exposuretime see table
1020.30 (b) (vii)
Measurement base of technique factors:
a. kV measurements have been obtained employing the following methods:
60 HZ
125 V
230 V
6 V
109-133 V
207-242 V
125V: 9.5A
230V: 5.0A
1: 60 in sec.
+ 10kV
Z:
+ 1.2 DCmA
2.0 DCmA
50 HZ
=
125 V o;
230V
6V
109-132 V
207-240 V
17.0A
9.0A
1 : 60 in sec.
+10kV
ー 9kV
+ 1.0 DCmA
— 2,5 DCmA
Oscilloscope with frequency compensated bleeder resistors and a spectrum analyzer.
b. Tube current is measured by a DCmA-meter, accuracy 1,5 % at full scale.
c. The exposure time is measured with an oscilloscope, and is determined by the time
of high - voltage without the pre - heat time.