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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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MWD and LWD 967<br />

Gage response to axial load is<br />

(F0R.L)<br />

AR =<br />

(E A)<br />

(4-20 1)<br />

where R = gage resistance in R<br />

AR = resistance variation in R<br />

F = gage factor<br />

L = load in Ib<br />

E = Young modulus<br />

A = sub cross-section or area in in.2<br />

Gage response to torque is<br />

(T F. R. R")<br />

AR = f<br />

G K (R: - Rf )<br />

(4-202)<br />

where T = torque in in*lb<br />

F = gage factor<br />

R = gage resistance in L2<br />

R

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