Torsional Stress - Hioki MEMORY HiLOGGER LR8450 Instruction Manual

Measuring Strain

Torsional stress

Gage method
2-gage method
(adjacent side)
(torsion strain)
4-gage method
(torsion strain)
Even in measurements that are affected by temperature, you can compensate for temperature
by using a self-temperature-compensated strain gage. Longer wires are more susceptible
to the effects of temperature. Long wiring runs make lead wires susceptible to the effects of
temperature. You can make measurements with a high degree of precision by using wireless
modules to shorten wiring lengths.
For information about self temperature-compensated strain gages, contact your strain gage's
manufacturer.
272
Bridge circuit diagram
Output
voltage
e
Applied voltage
E
Output
voltage
e
Applied voltage
E
Output
e = 2ε When measuring strain in the
rotational direction, two strain
gages are offset so that they
intersect at an angle of 90°. Use
a scaling conversion ratio slope
of 1/2.
e = 4ε This connection method is not
affected by temperature changes
of the measurement target or
tension/compression/bending
strain. Use a scaling conversion
ratio slope of 1/4.
Remarks