CCDA Actuator Simulator Test (CRC)

TM 55-4920-430-13

(6) Disconnect No. 1 and No. 2 multimeters.

d. Integration Rate Test.

(1) Connect the dc power supply across receptacle pins J1-T (+) and J1-S. Connect No. 1 digital

multimeter across the dc power supply. Adjust the power supply for 15 volt dc on No. 1 multimeter.

Connect No. 2 multimeter between receptacle pins J3-x (+) to J3-AA. The multimeter shall indicate

-0.006 to +0.006 volt dc.

(2) Reverse the connections from the power supply. Apply +15 volt dc across receptacle pins J1-S

(+) and Jl-T. Within 2.5 to 3.7 seconds, No. 2 multimeter shall change to -1.0 to -3.0 volt dc. Wait 10

seconds. Allow output to saturate. The multimeter shall rise to -6.65 to 7.35 volt dc.

(3) Reverse the connections from the power supply. Apply +15 volt dc across receptacle pins J1-T

(+) and J1-S. Within 2.5 to 3.7 seconds, No. 2 multimeter shall change to -3.0 to -1.0 volt dc.

(4) Set the LCT switch to GND. Set No. 2 multimeter RANGE switch to 2V. The multimeter shall

indicate -0.001 to +0.001 volt dc.

(5) Disconnect the dc power supply and digital mulimeters.

4-60. CCDA Actuator Simulator Test (CRC). (See fig. 4-10.) This test ensures that the actuator

simulator provides the appropriate position signal in response to a drive signal.

a. Resistance Test (Power Disconnected).

(1) Set the TESTER POWER 115V 400 HZ switch to OFF.

(2) Connect the resistance test aid to receptacle AFCS J3.

(3) Connect the multimeter between test aid pins J3-E and J3-AA. Set multimeter RANGE to 20

K. The multimeter shall indicate 1,890 to 2,310 ohms. Do not disconnect the test aid.

Do not change the test connections between the power-off and power-

on resistance tests, If test connections are changed, test equipment

can be damaged.

NOTE

Power-on resistance tests are not usually performed but the circuit

under test is, in this case, passive. The test, as written, poses no hazard

to test equipment, provided that the test equipment remains correctly

connected to J3-E and J3-AA.

b. Resistance Test (Power Connected).

(1) Set the TESTER POWER 115V 400 HZ switch to ON. The multimeter shall indicate 35.1 to

42.9K ohms.

(2) Set the TESTER POWER 115V 400 HZ switch to OFF,

(3) Disconnect the resistance test aid.

c. Voltage Test (Power Connected).

(1) Set TESTER POWER 115V 400 HZ switch to ON.

(2) Set the CCDA switch to NORM.

(3) Connect a jumper between receptacle pins J3-E and J3-AA.

(4) Set the digital multi meter to measure 2 vdc. Connect the multimeter across receptacle pins J3-e

(+) and J3-AA. The multimeter shall indicate -0.02 to +0.02 volt dc. Set multimeter FUNCTION

switch to AC. The multimeter shall indicate less than 0.65 volt ac.

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