TB 9-6625-1918-24
Figure 1. Test instrument - right side view.
(4) Adjust ZERO SET COARSE and FINE controls until TI meter indicates 0
(zero). If multimeter does not indicate between 0.460 and 0.470 V ac, perform b (1) and (2) below.
NOTE
In the following step, it may be necessary to advance BOLO
BIAS CURRENT (BIAS CURRENT on TS779/U) switch to
obtain a full-scale indication with ZERO SET COARSE and
FINE controls.
(5) Adjust ZERO SET COURSE and FINE controls until TI meter indicates full
scale. If multimeter does not indicate between 0.188 and 0.192 Vac, perform b (3) and (4) below.
b. Adjustments
(1) Adjust ZERO SET COARSE and FINE controls for a 0.465 Vac indication on
multimeter.
(2) Adjust R58 ZERO ADJ (fig. 1) for a 0 (zero) indication on TI meter (R).
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