TB 9-5855-1891-40
APPENDIX A
(Continued)
LAB STANDARD MIRROR IN PLACE
HORIZONTAL (ARC
VERTICAL (ARC
SECONDS)
SECONDS)
WINDOW 1 (UPPER)
1. ________________________
1. ________________________
2. ________________________
2. ________________________
3. ________________________
3. ________________________
4.
4.
__________________________
__________________________
5. ________________________
5. ________________________
AVERAGE _______________
AVERAGE _______________
STD DEV ________________
STD DEV ________________
WINDOW 2 (MIDDLE)
1. ________________________
1. ________________________
2. ________________________
2. ________________________
3. ________________________
3. ________________________
4. ________________________
4. ________________________
5. ________________________
5. ________________________
AVERAGE _______________
AVERAGE _______________
STD DEV ________________
STD DEV ________________
WINDOW 3 (BOTTOM)
1. ________________________
1. ________________________
2. ________________________
2. ________________________
3. ________________________
3. ________________________
4. ________________________
4. ________________________
5. ________________________
5. ________________________
AVERAGE _______________
AVERAGE _______________
STD DEV ________________
STD DEV ________________
HORIZONTAL DIFFERENCES
(AVG WINDOW 1) - (AVG WINDOW 2) = __________________________________
(H3)
AVG WINDOW 1) - (AVG WINDOW 3) = ___________________________________
(H4)
VERTICAL DIFFERENCES
(AVG WINDOW 1) - (AVG WINDOW 2) = __________________________________
(V3)
(AVG WINDOW 1) - (AVG WINDOW 3) = __________________________________
(V4)
DIFFERENCES BETWEEN MIRRORS
NOTE:
HORIZONTALS
If STD DEV (standard
Hl - H3= ____________________________________________ (X1)
deviation) equals 1.0 or
H2 - H4= ____________________________________________(X2)
greater, this indicates a
VERTICALS
probable error in taking the
V1 - V3 =____________________________________________(Y1)
readings. Repeat the test.
V2 - V4= ____________________________________________(Y2)
(WINDOW 1 - WINDOW 2) DEVIATION _______ X12 + Y12
>3.71 = Fail
=
(WINDOW 1 - WINDOW 3) DEVIATION _______ X22 + Y22
= >3.71 = Fail
A-2