Quantcast Table 6-11.--Controls and Indicators for the Current Flow Test - Cont'd
 

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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.

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