Warning Flag Deflection Test

TM 11-5840-270-24-1

d. Continue to hold S2 depressed and adjust R1

t. Adjust R1 until horizontal pointer is aligned

counterclockwise until vertical pointer just moves

over second dot below airplane. Observe that M1

away from the stop. Observe that M1 indicates not

indicates 10711 microampere.

less than 130 microampere.

u. Adjust R1 until horizontal pointer is aligned

e. Release S2 and rotate R1 to maximum

over third dot below airplane. Observe that M1

counterclockwise.

indicates 1507.5 microampere.

j. Set S1 to L.

v. Rotate R1 full counterclockwise.

g. Depress and hold S2.

w. Set S8 to OFF position.

h. While holding S2, adjust R1 until M1 in-

4-22. Warning Flag Deflection Test

dicates 750 microampere. Observe that vertical

a. Check that S8 is in OFF position.

pointer is off-scale (beyond dots and against left

b. Set S1 to V position

internal stop).

c. Adjust R1 until vertical warning flag (fig. 1-1)

i. Continue to hold S2 depressed and adjust R1

just moves. O b s e r v e that M1 indicates 125

counterclockwise until vertical pointer just moves

microamperes 6.25 A.

away from the stop. Observe that M1 indicates not

NOTE

less than 130 microampere.

In c above, if current is above 131.25 A,

j. Release S 2 and rotate R1 to maximum

mechanism spring tension must be adjusted

counterclockwise.

to reduce tension. Move the terminal on the

k. Set S1 to UP.

flag mechanism with the white wire clock-

l. Depress and hold S2.

wise slightly and recheck. If c above is

m. While holding S2, adjust R1 until M1 in-

u n d e r 118.75 A, move terminal on

dicates 750 microampere. Observe that vertical

mechanism counterclockwise slightly and

pointer is off-scale (Beyond dots and against top

recheck. The case must be removed to

internal stop).

obtain access to mechanism (para 4-8).

n. Continue to hold S2 depressed and adjust R1

d. Adjust R1 until vertical flag disappears behind

counterclockwise until vertical pointer just moves

mask. observe that M1 indicates 250 microam-

away from the stop. Observe that M1 indicates not

peres 12.5 A.

less than 130 microampere.

e. Rotate R1 to maximum counterclockwise

o. Release S2 and rotate R1 to maximum

position.

counterclockwise.

f. Set S1 to H position.

p. Set S1 to DWN.

g. Adjust R1 until horizontal warning flag (fig. 1-

q. Depress and hold S2.

1) just moves. Observe that M1 indicates 125

r. While holding S2, adjust R1 until M1 in-

microamperes 6.25 A.

dicates 750 microampere. Observe that vertical

NOTE

pointer is off-scale (beyond dots and against bottom

In g above, if current is above 131.25A,

internal stop).

mechanism spring tension must be adjusted

s. Continue to hold S2 depressed and adjust R1

to reduce tension. Move the terminal on the

counterclockwise until vertical pointer just moves

flag mechanism with the orange wire clock-

away from the stop. Observe that M1 indicates not

wise slightly and recheck. If g above is

less than 130 microampere.

under 118.75A, move terminal on

t. Release S2 and rotate R1 to maximum

mechanism counterclockwise slightly and

counterclockwise.

recheck. The case must be removed to

4-24. Pointer Response Time Test

obtain access to mechanism (para 4-8).

a. Set S1 to R.

h. Adjust R1 until horizontal flag disappears

b. Depress and hold S6.

behind mask. Observe that M1 indicates 250

c. While holding S6, adjust R2 until vertical

microampere 12.5A.

pointer is just tangent to inside edge of outermost

i. Rotate R1 to maximum counterclockwise

dot on indicator dial. Release S6.

position.

d. Observe and record M1 indication. Multiply

4-23. Pointer Stops Test

recorded indication by 1.1.

a. Set S1 to R position.

e. Adjust R2 to current value computed in d .

b. Depress and hold S2.

above.

c. While holding S2, adjust R1 until Ml in-

f. Depress S5 to reset timer to 00, and then

dicates 750 microampere. Observe that vertical

release S5.

pointer is off-scale (beyond dots and against right

g. Depress S4 and hold until vertical pointer is

internal stop).

4-9