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Measuring belt tension with frequency meter
1.
Remove protective cover.
2.
Tap against the belt with the handle of a hammer or with a wrench to initiate belt vibration.
3.
Hold measuring tip of the frequency meter over belt drive.
4.
The measured frequency value appears in the display of the frequency meter.
5.
Compare measured value with value in the table.
6.
If the measured values deviate from the specified values, adjust drive belt tension (→ Page 108)
7.
Install protective cover.
Belt length ‒ Application
Specification
Initial installation (new belt)
Specification
Operating tension (used belt)
Drive belt 1522 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1558 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1623 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1665 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1707 mm – fan
Frequency: 113 ±1 Hz
Frequency: 103 ±1 Hz
Drive belt 1800 mm – fan
Frequency: 118 ±1 Hz
Frequency: 104 ±1 Hz
Drive belt 1854 mm – fan
Frequency: 114 ±1 Hz
Frequency: 104 ±1 Hz
Drive belt 1936 mm – fan
Frequency: 117 ±1 Hz
Frequency: 110 ±1 Hz
Drive belt 1971 mm – fan
Frequency: 116 ±1 Hz
Frequency: 106 ±1 Hz
Drive belt 2008 mm – fan
Frequency: 115 ±1 Hz
Frequency: 105 ±1 Hz
Table 8: Specified values ‒ Measurement with frequency meter 16V
Belt length ‒ Application
Specification
Initial installation (new belt)
Specification
Operating tension (used belt)
Drive belt 1800 mm – fan
Frequency: 88 ±1 Hz
Frequency: 77 ±1 Hz
Drive belt 1520 mm – fan
Frequency: 104 ±1 Hz
Frequency: 92 ±1 Hz
Table 9: Specified values ‒ Measurement with frequency meter 18V
MS150117/01E 2014-10
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