Checking The Tension Of The Driving Belt With The Frequency Test - h/p/cosmos 150/50 Operating And Service Manual

8.7.2

Checking the tension of the driving belt with the frequency test

Check the belt tension with measuring device for belt tension [cos14863]:
Switch off the running machine at the main switch.
N
Visually inspect the drive belt for abrasion and
N
correct fitting.
Switch on the tuning device.
N
Ensure that the tuning device is in „BASS" mode,
N
change with button GUITAR/BASS.
Hold the tuning device with the microphone (MIC)
N
close to the bottom run of the drive belt and pick the
run (see picture).
The tension of the drive belt at the bottom run (see
N
picture) should be between 98 Hz and 102 Hz
(frequency during oscillation).
Check the tone in the display: target = 1G – adjust
N
the tension of the drive belt if necessary.
Check the amplitude of the needle: target 440 ... 460 – adjust the tension of the drive belt if necessary.
N
When the tuning device indicates the tone 1G and an amplitude of the needle of 440 ... 460, the tension of the
N
drive belt is OK.
Chart with tones to the corresponding frequency:
Target value
X
X
X
The frequency target value is between 98 Hz and 102 Hz. This is equivalent to the tone 1G. If the result of the test
is outside of this area, the tension of the drive belt must be adjusted.
frequency < value 98: belt tension needs correction to higher tension.
frequency > value 102: belt tension needs correction to lower tension.
The driving belt must be rechecked after changing the tension of the driving belt.
© 2013 h/p/cosmos sports & medical gmbh
Frequency driving
belt (Hz)
70
76
79
81
82
85
87
90
92
95
98
100
103
104
106
109
file: n:\article\cos14310m5-v1_07hpc-en\20130207_cos14310m5-v1.07hpc-en_h-p-cosmos_treadmill_manual.doc
author: fh email@h-p-cosmos.com
maintenance and safety inspections
bottom belt run / place to pick
Tone Scale
LB
2D 420
2D 455
4E 425
4E 440
4E 440
4E 447
4E 457
1G 422
1G 425
1G 432
1G 440
1G 450
1G 457
3A 425
3A 427
3A 437
HC
created 07.02.2013 printed 04.03.2013
upper belt run
page: 121 of 197