TB 9-6625-1878-40
8. Terminal Linearity (ESI, Model DT72A Only)
a. Performance Check
(1) Adjust oscillator and null detector for 1 kHz operation with approximately 10 V output.
(2) Set TI dials to 0.9000000 and set decade transformer to 0.9000000.
(3) Adjust decade transformer and phase compensator for best null on null detector.
Decade transformer will indicate between 0.8999900 and 0.9000100.
NOTE
Refer to decade transformer calibration test report for
corrections.
(4) Repeat technique of (2) and (3) above for each setting listed in table 3. Decade
transformer indication will be within limits specified.
(5) Repeat technique of (1) through (4) above with oscillator set at 50 Hz.
b. Adjustments. No adjustments can be made.
Table 3. Terminal Linearity (ESI, Model DT72A)
Test instrument
Decade transformer indications
settings
Min
Max
0.8000000
0.7999900
0.8000100
0.7000000
0.6999900
0.7000100
0.6000000
0.5999900
0.6000100
0.5000000
0.4999900
0.5000100
0.4000000
0.3999900
0.4000100
0.3000000
0.2999900
0.5000100
0.2000000
0.1999900
0.2000100
0.1000000
0.0999900
0.1000100
0.0900000
0.0899900
0.0900100
0.0800000
0.0799900
0.0800100
0.0700000
0.0699900
0.0700100
0.0600000
0.0599900
0.0600100
0.0500000
0.0499900
0.0500100
0.0400000
0.0399900
0.0400100
0.0300000
0.0299900
0.0300100
0.0200000
0.0199900
0.0200100
0.0100000
0.0099900
0.0100100
0.1111111
0.1111011
0.1111211
0.2222222
0.2222122
0.2222322
0.3333333
0.3333233
0.3333433
0.4444444
0.4444344
0.4444544
0.5555555
0.5555455
0.5555655
0.6666666
0.6666566
0.6666766
0.7777777
0.7777677
0.7777877
0.8888888
0.8888788
0.8888988
0.9999999
0.9999899
1.0000099
a. Performance Check
(1) Adjust oscillator and null detector for 1 kHz operation with approximately 10 V output.