Miscellaneous Circuitry

TM 11-6625-444-14-1

5-13. Miscellaneous Circuitry

from either a 115 or 230V ac line. When S2 is set

to 115, the primary windings of T1 are connected

in parallel. The 230 position of S2 connects the

I n p u t power t o t h e i n s t r u m e n t a n d i n -

windings in series. Secondary windings of T1

terconnection of various assemblies is shown in

provide ac voltages to the power supply (A1) and

the interconnect and wiring diagrams (fig. FO-10

optional data output unit No. 2 (A6). Shielding

and FO-11). Line power is fused by F1 and ap-

between the primary and secondary windings

plied through the contacts of POWER switch S1

prevents coupling of any undesired line signals to

and transformer T1. The primary of T1 consists of

the internal sections of the voltmeter.

two windings which are parallel or series con-

nected through slide switch S2 to allow operation

5-19