TM 11-5840-208-30-1
(18) Disconnect the test leads.
h. Alignment of C ∆ A Potentiometer R842.
(1)
Connect the red test lead to J890.
(2)
Connect the black test lead to J897.
(3)
Connect the test probe to J879.
Set detent switch S856 at OFF and place the ∆ RANGE and ∆ ZIMUTH handwheels in detent.
(4)
(5)
Set the bridge potentiometer to 0000.
(6)
Adjust potentiometer R883 for meter null.
Note: If necessary to obtain meter null, slightly reduce the gain of C ∆ A
servoamplifier AR929B.
(7)
Record the AZW counter reading__________________________.
(8)
Connect the red test lead to J889.
(9)
Connect the test probe to J880.
(10) Set the bridge potentiometer to 5000.
(11) Set detent switch S856 to DETENT RELEASE and position the ∆ AZIMUTH handwheel for meter null.
(12) Disconnect the red test lead and the test probe.
(13) Set the TEST-NORMAL switch at TEST (C dials must read 1.00).
(14) Adjust -C ∆ A potentiometer R994 for an AZW reading 35 mils less than the reading recorded in (7) above.
(15) Connect the red test lead to J892.
(16) Connect the test probe to J880.
(17) Position the ∆ AZIMUTH handwheel for meter null.
(18) Disconnect the test leads.
(19) Adjust +C ∆ A potentiometer R995 for an AZW reading 35 mils more than the reading recorded in (7) above.
(20) Return the TEST-NORMAL switch to NORMAL.
i.
Alignment of A R Potentiometer R833.
(1)
Connect the red test lead to J890.
(2)
Connect the black test lead to J897.
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