Effect of Device Warm-Up Time on Load-Voltage Relationship in S-Type Load Cells

Authors

Jherrica Phillips, California State University Monterey BayFollow
Marcus Pulido-Ojeda, California State University, Monterey BayFollow
Mikaela Kirkpatrick, California State University, Monterey BayFollow
Ashley Landa, California State University, Monterey BayFollow
Eric Martin, California State University, Monterey BayFollow
George Beckham, California State University, Monterey BayFollow
Steven Kim, California State University, Monterey BayFollow

Abstract

Warm up time may have an effect on voltage readings taken from s-type load cells, making prior load- voltage calibration equations inaccurate. PURPOSE: To evaluate the effect of warm up time on load- voltage relationship in s-type load cells. METHODS: Dead weight calibrations were performed on two load cells using 200kg after 15 minutes, 1 hour, and 2 hours of warm up time. A linear model was created to estimate the influence of warm up time on the load-voltage relationship (i.e. voltage = β0 + β1•load + β2•power.source(plug) + β3•time + β4•load • time.) RESULTS: Time did not affect voltage in one testedload cell (i.e. no main (p=0.2396) or interaction effect for load x time (p=0.7492)). In the second load cell, there was a significant interaction effect of load x time (p=0.0079). At 200kg (i.e. the maximum tested load), each minute of additional warm up time would change measured voltage by about -0.00005 volts on average. CONCLUSION: Although time did affect voltage and the load-voltage relationship, the size of the effect may be practically irrelevant.

Recommended Citation

Phillips, Jherrica; Pulido-Ojeda, Marcus; Kirkpatrick, Mikaela; Landa, Ashley; Martin, Eric; Beckham, George; and Kim, Steven (2022) "Effect of Device Warm-Up Time on Load-Voltage Relationship in S-Type Load Cells," International Journal of Exercise Science: Conference Proceedings: Vol. 14: Iss. 2, Article 163.
Available at: https://digitalcommons.wku.edu/ijesab/vol14/iss2/163