TM 11-5840-208-30-1
(3)
Connect the test probe to J873.
Set detent switch S856 at OFF and place the ∆ RANGE and ∆ AZIMUTH handwheels in detent.
(4)
(5)
Set the bridge potentiometer at 0000. If the meter nulls, proceed to the next step. If the meter does not null,
mechanical alignment of R833 is required. See paragraph 5-6c.
(6)
Connect the red test lead to J893.
(7)
Set the bridge potentiometer to 5000.
Set detent switch S856 to DETENT RELEASE and position the ∆ RANGE handwheel for meter null.
(8)
(9)
Connect the red test lead to J891.
(10) Set the bridge potentiometer to 3372.
(11) Adjust + ∆ R potentiometer R987 for meter null.
(12) Connect the red test lead to J894.
(13) Set the bridge potentiometer to 5000.
(14) Position the ∆ RANGE handwheel for meter null.
(15) Connect the red test lead to J890.
(16) Set the bridge potentiometer to 3372.
(17) Adjust - ∆ R potentiometer R988 for meter null.
(18) Disconnect the test lead.
Alignment of C ∆ R Potentiometer R834.
j.
(1)
Connect the red test lead to J890.
(2)
Connect the black test lead to J897.
(3)
Connect the test probe to J874.
Set detent switch S856 at OFF and place the ∆ RANGE and ∆ AZIMUTH handwheels in detent.
(4)
(5)
Set the bridge potentiometer to 0000.
(6)
Adjust potentiometer R882 for meter null.
Note: If necessary to obtain meter null, slightly reduce the gain of C ∆ R servoamplifier
AR928B.
(7)
Set RW counter to 7500.
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