TB 9-6625-1062-24
Table 4. General Radio, Type 722-D Check
Type 722-D Low Range
Type 722-D High Range
Settings
Tolerances (pF)
Settings
Tolerances (pF)
25
0.08
100
0.40
30
0.08
150
0.40
35
0.08
200
0.40
40
0.08
250
0.40
45
0.08
300
0.40
50
0.08
350
0.40
55
0.08
400
0.40
60
0.08
450
0.45
65
0.08
500
0.50
70
0.08
550
0.55
75
0.08
600
0.60
80
0.08
650
0.65
85
0.08
700
0.70
90
0.09
750
0.75
95
0.10
800
0.80
100
0.10
850
0.85
105
0.10
900
0.90
110
0.11
950
0.95
115
0.12
1000
1.00
---
---
1050
1.05
---
---
1100
1.10
---
---
1150
1.15
(16) Disconnect capacitance bridge from LOW and center terminal and move
shorting bar of TI to LOW and center terminals.
(17) Connect capacitance bridge UNKNOWN HIGH and LOW terminals to TI HIGH
and center terminals
(18) Adjust TI for indication of 100 on dial.
(19) Measure capacitance and record value.
(20) Subtract value recorded in (11) above from value recorded in (19) above.
Calculated value will be within 0.4 pF of previous test report value. Record value on test
report.
(21) Repeat technique of (18) through (20) above at each remaining high range
setting on test report. Values will be within the tabulated tolerances listed in table 4 of
previous test report values. Record values on test report.
(22) Adjust TI for indication of 350 on dial.
(23) Measure capacitance and record value.
(24) Subtract value recorded in (11) above from value recorded in (23) above. Record
value on test report.
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