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Table 1 Four different calibration settings for the MTI/CSA, varying in Frequency, radius, and acceleration

From: Unit-specific calibration of Actigraph accelerometers in a mechanical setup – Is it worth the effort? The effect on random output variation caused by technical inter-instrument variability in the laboratory and in the field

MTI instruments

Setting

Frequency (Hz)

Radius (mm)

Acceleration (m*s-2)

Output (counts*min-1)

#1

1.657

22.0

1.52

≈ 3000

#2

1.537

35.5

2.08

≈ 5000

#3

0.950

49.0

1.11

≈ 3000

#4

1.657

49.0

3.38

≈ 8000

CSA instruments

#1

1.705

22.0

1.61

≈ 3000

#2

1.578

35.5

2.22

≈ 5000

#3

0.970

49.0

1.16

≈ 3000

#4

1.717

49.0

3.63

≈ 8000

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BMC Medical Research Methodology

ISSN: 1471-2288

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