22 Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin C (AC).
23 Measure, with the ratiometers, the voltage ratio DE/DF between pin D and pin E and between pin D and pin
F.
24 Set the actuator to the ELECTRICAL RETRACTED position (door flight opened).
Make sure that the voltage ratio AB/AC =
0.902 + 0/- 0.010. Record AB/AC.
Make sure that the voltage ratio DE/DF =
0.902 + 0/- 0.010. Record DE/DF.
Page 1014
Mechanical Stop Extended Position
pin E
VERSIONS ABC - STROKES, MICROSWITCHES AND POTENTIOMETER TEST
Figure 1005/GRAPHIC 21-53-12-991-006-A01
Page 1015
21-53-12
JUN 15/10
(b) For Versions DE
ACTION RESULT
1 Connect the actuator to the Electrical Test Set-Up (ratiometers) (Ref. to Fig. 1001).
2 Carefully set the auto-transformer to have a very low displacement speed (lower than 1 mm/s (0.039 in/s)) (Ref. to Fig. 1003).
3 Set the actuator to the MECHANICAL STOP RETRACTED position (door fully closed).
4 (Ref. to Fig. 1006).
5 Measure the distance DRF between the measurement point X and the measurement point Y.
6 Measure the total resistance X of the main potentiometer between pin A and pin C of the connector.
7 Measure the total resistance Y of the secondary potentiometer between pin D and pin F of the connector.
8 Calculate |X – Y|.
9 Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin
C.
10 Measure, with the ratiometers, the voltage ratio DE/DF between pin D and pin E and between pin D and pin
F.
11 Carefully set the auto-transformer to have a displacement speed between 3 mm/s and 5 mm/s (between 0.118 in/s and 0.197 in/s).
Record DRF.
Make sure that X = 6600 ± 660 .. Record X.
Make sure that Y = 6600 ± 660 .. Record Y.
Make sure that |X – Y| < 660 .. Record |X – Y|.
Make sure that AB/AC = 0.0634 +0.0080/-0.
Record AB/AC.
Make sure that DE/DF = 0.0634 +0.0080/-0.
Record DE/DF.
Page 1016
ACTION RESULT
12 Set the actuator to the ELECTRICAL EXTENDED position (door flight opened).
13 Measure the distance E between the measurement point X and the measurement point Y.
14 Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin
C.
15 Measure, with the ratiometers, the voltage ratio DE/DF between pin D and pin E and between pin D and pin
F.
16 Set the actuator to the ELECTRICAL RETRACTED position (door flight closed).
17 Measure the distance D between the measurement point X and the measurement point Y.
18 Measure, with the ratiometers, the voltage ratio AB/AC between pin A and pin B and between pin A and pin
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