Table 6-11.--Controls and Indicators for the Current Flow Test

Table 6-11.--Controls and Indicators for the Current Flow Test--Continued

CONTROL OR INDICATOR

FUNCTION

Lever switch; provides additional

ADD RES

resistance (less current) to all four

resistance circuits.

In ZERO position - provides no

additional resistance.

In 10,000 position - provides

10,000 ohms additional resistance.

In 30,000 position - provides

30,000 ohms additional resistance.

Lever switch; selects meter scale

METER SCALE

used.

In 15 position - selects 15-milli-

ampere scale.

In 75 position - selects 75-milli-

ampere scale.

In 750 position - selects 750-

milliampere scale.

Binding post; used for connecting

NEG RLY

relays having external battery on

one terminal.

Binding post; used for connecting

POS RLY

relays having external ground or

positive battery potential on one

terminal,

Power cord.

BAT GRD

Three-scale dc milliammeter; indic-

Milliammeter

ate current being applied to relay

under test.

at time of installation. If it is desired that the features

DYNALEC 200/500 CENTRALOFFICE

to a station be changed, this is easily done. Contact the

TELEPHONE SYSTEM

IC room supervisor.

The central office telephone system (figs. 6-48

and 6-49) provides point-to-point communication for

Central Office Switchboard

ship's personnel in the same manner as commercial

telephone systems. Special features provide

The central office switchboard (fig. 6-48) is made

capabilities that accommodate emergency conditions,

up of from one to five switchboards and a power

protect secure compartments from compromise, allow

supply unit. The equipment is in modular form. Except

command level people to obtained right-of-way, and

for crossbar switches and dc converters, the modules

increase the probability of call completion. All

are mounted on swing out gates. This gives easy access

stations connected can be either private line service or

to the module terminals. Each unit is enclosed in a

two-party line service. These features are established

freestanding steel cabinet.

6-59