Table 6-9.--Operating Procedures for the Line Fault Routiner

Table 6-9.--Operating Procedures for the Line Fault Routiner

Operating Procedure

1.1

Connection to System

Place keys S1, S2 and S3 in their center positions. Connect the single black lead to cabinet

ground.

In the system to be tested, disconnect any finder X-Y Switch from its associated finder

assembly. Connect plug P404 of the test box to the vacated jack J404 and connect jack J404

of the test box to the X-Y Switch plug P404.

1.2

Lamp Test

All six lamps of the test box should now be on.

Place Key S1 in the position corresponding to the type of system under test. All six lamps

should now be off.

1.3

Power Fault Test

Momentarily operate Key S2 to the Neg Power Fault position.

If the System Negative to Hull fault lamp comes on, no further testing should be attempted

until this fault has been removed from the system.

Momentarily operate Key S2 to the Pos Power Fault position.

If the System Positive to Hull fault lamp comes on , no further testing should be attempted

until this fault has been removed from the system.

1.4

Line Testing

If a power fault condition is not encountered in either of the above tests, the test box will

automatically begin line testing.

1.5

Stop/Reset

Line testing may be stopped at any the by momentarily operating Key S3 to the Stop/Reset

position.

1.6

Re-Start after Line Fault

To manually re-start the test circuit after it has been stopped by the detection of a faulty

line, momentarily operate Key S3 to the Re-Start After Line Fault position.

Temporarily disconnect line 11 from the system and in its place connect a 2000 ohm

precision resistor. Proceed with steps 1.1 through 1.4 above. When the test circuit has

stopped on line 11, adjust the meter calibration potentiometer for a meter reading of 2000

ohms exactly. Reset the test circuit and reconnect line 11 to the system.