PROBLEM 6.4
KNOWN:
R3 = R4 = 200
R2 = variable resistor
R1 = 40 x + 100
FIND:
a) R2 to balance the bridge with x = 0
b) Find a general expression for x = f ( R2 )
SOLUTION:
Under balanced conditions.
R2 R4
=
R1 R3
With x = 0, R1 = 100 , so
=
R2 (100 )(1

PROBLEM 5.10
KNOWN:
p = 20 kPa @ FSO (full scale output)
(uo)3 = 0.01 kPa
(uo)4 = 0.001 kPa
FIND: Select 3 1/2 or 4 1/2 digit display based on uncertainty
SOLUTION
A design-stage analysis is appropriate here as the selection pertains to identical
instrume

PROBLEM 4.2
KNOWN: N > 10 000; x = 192.0 units ; sx= 10 units
FIND: x' - z1 x x' + z1 at P = 90%
ASSUMPTIONS Measurand follows a normal density function
Data set sufficiently large such that x x and sx
SOLUTION
Given the large data set, the statistics ap