It is important to select correct loadcell rating for an application. This can be determined by calculating the net force by choosing the wrap configuration diagram shown.

The selected load rating may be 20% less than the computed Net Force. The actual force on the transducer will read 125% of the load rating before hitting the stops. This is acceptable because the Net Force formula contains an oversizing factor of 2, which means that the actual force exerted on the transducer will not exceed its rating. Sometimes, a roll is so heavy that its weight uses up most of the operating range of the transducer.

At this condition since the adjustment range of the electronic circuit has been exceeded possible to adjust the tension indicating meter to read zero when tension is zero.

To rectify if the load is too heavy to adjust the tension meter at zero

a. Compare the laod rating along with the effective weight of the roll

b. If Wcos(A) is more than 95% of the load rating chosen

If this case changes to be made to reduce Wcos(A) less than 95% of load rating

• Reduce the transducer roll weight
• Increase angle (A)
• Use the next higher load rating (This is the least desirable choice because it reduces transducer signal output)

Web Tension Load Cell , Load Cell For Metal Industry