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METTLER TOLEDO Weigh Module Systems Handbook

(12/99)

5-12

Tank Interaction

When tank scales are located next to each other, the weight of one tank can affect

the load sensed by the other tank’s weigh modules. There is a strong potential for

this type of interaction when the tanks share a common foundation. The following

figures show four tank scale installations, ranging from best (Figure 5-17a) to

worst (Figure 5-17d).

Figure 5-17a Figure 5-17b

Figure 5-17a: The best choice is to mount weigh modules on concrete foundations.

Since concrete deflects very little, two tanks can share the same foundation without

interacting.

Figure 5-17b: The next best choice is to mount the weigh modules near vertical

beams, with a separate support structure for each tank. This limits deflection and

tank interaction.

Figure 5-17c Figure 5-17d

Figure 5-17c: The next to the worst choice is to mount the weigh modules at the

mid-span of a horizontal beam, using a separate support structure for each tank.

This limits vessel interaction but not support structure deflection.

Figure 5-17d: The worst choice is to mount the weigh modules at the mid-span of

a horizontal beam, with the two tanks sharing a common support structure. This

allows both deflection and vessel interaction.

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Mettler Toledo LJ16 Spécifications Page 54