3
SM5 Tension Meter
Operation Instructions
1. PRESS button (1) one second to activate meter
2. AIM light beam at belt back with a sensor distance of 0.4
to 1.2 inches
3. TAP belt to generate a vibration and SM5 will display a
frequency
4. WAIT for “Ready” display and repeat measurement to
confi rm reading
5. PRESS button (1) one second to turn off meter or meter will
auto power off after one minute
Tips and Notes:
• Turn off the machine as well as nearby machinery that could cause vibration interference while measuring.
• For best results take readings on the belt back rather than tooth side or edge.
• Take a few readings to confi rm consistency.
• For long belt spans better reading and resolution can be achieved by temporarily shortening the vibrating
free span L to around 1 meter.
• Frequency recommendations from calculations or our belt sizing program are initial theoretical settings and
should be confi rmed as optimal by observation for no signs of sag or apping during operation. Once
optimal tension is found then a new reading should be taken and recorded for future use.
• New belts conform to the geometry of a system and lose up to 10% pre-tension within the fi rst few hours of
run-in. Machine manufacturers often recommend diff erent frequency settings for new and used belts for this
reason.
• We off er a certifi cation service for traceability. Calibration interval depends on use/environment and is up to
the customer. Please contact customer service for pricing, turn around time and a return authorization
number.
Types of Belt Drives:
Select the type of belt drive below to determine required pretension (Fv) as a function of peripheral force.
These values are a starting point and tension should be increased as necessary to eliminate sag or apping
during peak peripheral belt loading.
Linear Drive
Belt Span Pre-tension Fv
Multiple Pulley Drive
Belt Span Pre-tension Fv
Two Pulley Drive
< 60 teeth Fv = 1/3 peripheral force
60 to 150 teeth
> 150 teeth
Fv = 1/2 peripheral force
Fv = 2/3 peripheral force
Any Fv = peripheral force
Taut Length < slack length
Fv = peripheral force
Fv > peripheral force
Pre-tension Fv# of belt teeth
Taut Length > slack length
To Next Page
Loading...