WÖHWA Waagenbau GmbH

Questionnaire and Accuracy Specification
WÖHWA Belt Scale SFB

* Required fields


1/21 Installation location for the belt scale

Please select the installation location for the belt scale matching your local conditions.


2/21 Belt inclination

The degree of belt inclination must be such that there is no relative movement of the conveyed bulk material (material must not roll back on the belt).


3/21 Material feeding point

 
Ideal values

actual values on site
user input

M

measurement range = belt speed * 1/s =

E

zone of influence = 3 * measurement range =

A

minimum distance = belt speed / 3 * 1/s * E =


4/21 Minimum distance to head pulley

 
ideal value

actual transition length
user input

S

Safe distancemin = 2,5 * E =


5/21 Troughing angle


6/21 Idlers near the scale area

Consistent troughing and a low idler runout tolerance must be guaranteed.


7/21 Idler roll runout tolerance


8/21 Idler alignment tolerance


9/21 Idler level tolerance


10/21 Stationary or mobile plant


11/21 Environmental conditions

The belt scale is installed in a conveyor that is protected from wind, weather and extreme temperature variations.


12/21 Conveyor chassis and dimensions


13/21 Belt quality


14/21 Belt type


15/21 Weight-loaded belt tensioning device


16/21 Flow rate


17/21 Material density


18/21 Installation in loadout conveyor


19/21 Lateral feeding points


20/21 Skirtings


21/21 Legal-for-trade scale




Remarks

The belt scale installation site must be easily accessible during installation works.

Belt speed fluctuations have a detrimental effect on the belt scale accuracy.

Legal-for-trade belt scales require strict observance of the Verification Ordinance.

The final scale accuracy can only be established by in-service measurements.

The accuracies listed can only be achieved by strictly observing the regular maintenance intervals as indicated in the Operating Manual.