CPI Canada Inc.
Acceptance Testing
4
Millenia / Indico 100 Series Service Manual Ch # 740904-08 Rev. F
Page 4-11
4.5.1 Generator
Rad
Tests
(Cont)
CAUTION: THE FOLLOWING TESTS REQUIRE THE PRODUCTION OF X-RADIATION. USE APPROPRIATE
SAFETY PRECAUTIONS TO PROTECT PERSONNEL.
NOTE: IF USING TEST POINTS TP6 & 8, TP7 & 10, TP11 & 14 IN FIGURE 4-3 FOR
ACCEPTANCE TESTING, THE SCALING FACTORS SHOWN MUST BE
VERIFIED USING AN APPROPRIATE CALIBRATED REFERENCE STANDARD.
THE ACTUAL MEASURED SCALING VALUES SHOULD THEN BE USED IN
THIS PROCEDURE.
NOTE:
A DYNALYZER IS NOT RECOMMENDED FOR MA MEASUREMENTS WITH 100 KHZ INDICO 100
GENERATORS. BANDWIDTH LIMITATIONS OF THE DYNALYZER WILL RESULT IN
INACCURATE MA MEASUREMENTS AT MA VALUES LESS THAN APPROXIMATELY 100 MA.
MA MEASUREMENTS SHOULD BE MADE WITH AN MA/MAS METER CONNECTED TO THE MA
TEST JACKS ON THE HT TANK. EXPOSURE TIMES MUST BE GREATER THAN 100 MS TO
ENSURE ACCURATE MEASUREMENTS.
Refer to figure 4-3 for test point locations referenced in the following section(s).
Step
Action
Result
Check
1.
SEE NOTE ABOVE RE USE OF TEST
POINTS FOR VERIFYING CALIBRATION
Connect ‘scope probe channel 1 input to TP6
and TP8 (kVp)
Connect ‘scope probe channel 2 input to TP7
and TP10 (Rad mA).
Adjust ‘scope gains as required. Use the KV
signal to trigger the ‘scope.
N/A
2.
Switch ON the generator and after initialization
select the following radiographic technique:
kVp = 100, mA = 100, Time = 50 ms
Select an off-table receptor.
N/A
3.
Make an exposure and measure the kVp at
TP6 and TP8 and the Rad mA at TP7 and
TP10. Using scaling factors in figure 4-3, verify
the following results:
kVp = 100 KV
±
3%.
mA = 100 mA
±
4% (Millenia).
mA = 100 mA
±
5% (Indico 100).
Time = 50 ms
±
2 ms.
4.
Repeat step 3 but set the values to
kVp = 65, mA = 200.
kVp = 65 KV
±
3%.
mA = 200 mA
±
4% (Millenia).
mA = 200 mA
±
5% (Indico 100).
Time = 50 ms
±
2 ms.
