Hioki LR8450 User Manual

377
Measuring Strain
Torsional stress
Gage method Bridge circuit diagram Remarks
2-gage method
(adjacent side)
(torsion strain)
Applied voltage
E
Output
voltage
e
e = 2
ε
When measuring strain in the rotational direction,
two strain gages are o󰀨set so that they intersect
at an angle of 90°. Use a scaling conversion ratio
slope of 1/2.
DIP switch
ON ON OFF
1 2 3
Rg
1
Rg
2
4-gage method
(torsion strain)
Applied voltage
E
Output
voltage
e
e = 4
ε
This connection method is not a󰀨ected by
temperature changes of the measurement target or
tension/compression/bending strain. Use a scaling
conversion ratio slope of 1/4.
DIP switch
ON OFF OFF
1 2 3
Rg
4
Rg
2
Rg
1
Rg
3
Even in measurements that are a󰀨ected by temperature, you can compensate for temperature
by using a self-temperature-compensated strain gage. Longer wires are more susceptible
to the e󰀨ects of temperature. Long wiring runs make lead wires susceptible to the e󰀨ects 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.
Knowledge and Information
HIOKI LR8450A964-03
www.GlobalTestSupply.com
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Hioki LR8450 Specifications

General

Model	LR8450
Category	Data Loggers
Dimensions	330 mm (12.99 in) W × 221 mm (8.70 in) H × 120 mm (4.72 in) D
Weight	Approx. 2.8 kg (excluding battery)
Operating Temperature	0 to 40 °C (32 to 104 °F), 80% RH or less (no condensation)
Sampling Rate	1 ms to 1 hr
Memory	Internal memory
Interface	USB, Ethernet
Power Supply	AC adapter or battery
Measurement Range	Varies with module
Accuracy	Varies with module
Storage Media	SD card
Memory Capacity	Internal memory
Input Type	Voltage, temperature
Temperature Measurement	Varies with module
Communication Interface	USB, Ethernet
Measurement Channels	Up to 120 channels (with optional input modules)