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Page Title:
Transducer Linearity Record - CAL 50 |
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|  MIL-C-14858A (AR)
AMENDMENT 3
APPENDIX A
ANNEX 1
EXAMPLE
TRANSDUCER LINEARITY RECORD - CAL 50
Transducer Mfg: KISTLER
Pressure Stand:
Transducer Mod: 6215
Amplifier:
Transducer SN:
Digital Voltmeter:
No. of Rounds:
Cert by:
Date:
=====================================================================
Pressure Transducer output (volts)
Levels
First Second Third
Mean Linear T.S. F.S.
40K = 4.075 4.077
4.073
4.075 -0.3
9816 IN
50K = 5.109
5.112
5.113
5.111 0.0
9782
IN
60K = 6.139
6.141
6.139
6.140
0.1
9773 IN
=====================================================================
ERROR BAND LINEARITY VALUES
40K LOW 4.027
50K LOW 5.049
60K LOW 6.071
40K MEAN 4.088
50K MEAN 5.110
60K MEAN 6.132
40K HIGH
4.149
50K HIGH
5.171
60K HIGH
6.193
=====================================================================
TRANSDUCER LINEARITY DETERMINATION
(METHOD OF LEAST SQUARES)
Least squares line that passes through the origin to
Obtain a straight line fit in which y = Bx where
B = x1y1 + x2y2 + x3y3 = Slope
x1^2 + x2^2 + x3^2
= 40*4 .075 + 50*5 .111 + 60*6 .140 = .1022
40^2 + 50^2 + 60^2
Bx1 = .1022*40 = 4.088
Bx2 = .1022*50 = 5.110
Bx3 = .1022*60 = 6.132
Error band width = + .01*6 .132 = + .06132
14 (30)
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