Specifications

METTLER TOLEDO Weigh Module Systems Handbook
(12/99)6-4
Installation
The actual installation procedure will depend on the specific requirements of an
application. One of the first things to consider is the foundation on which the tank scale
will be placed. This is usually a concrete floor or steel support structure. Whichever you
are using, you will need to make sure that it is strong enough to remain rigid under the
weight of the full tank scale. The base plate bearing data in Table 6-1 lists the pressure
that each weigh module will exert on its foundation.
0958 Flexmount Weigh
Module lb (kg)
Base Plate Bearing psi
(pascal)
Top Plate Bolts (Metric) Base Plate Bolts (Metric)
250, 500, 1.25K, 2.5K & 5K
(220, 550, 1100 & 2200)
159 (1,094,413) 3/8”-16 UNC (M10 x 1.5) 3/8”-16 UNC (M10 x 1.5)
10K (4400) 180 (1,242,306) 5/8”-11 UNC (M16 x 2) 5/8”-11 UNC (M16 x 2)
20K 179 (1,231,214) 3/4”-10 UNC (M20 x 2.5) 3/4”-10 UNC (M20 x 2.5)
30K 268 (1,846,821) 3/4”-10 UNC (M20 x 2.5) 3/4”-10 UNC (M20 x 2.5)
45K 312 (2,154,625) 1”-8 UNC (M24 x 3) 1”-8 UNC (M24 x 3)
Bolts should be GR.5 / ASTM A325 minimum
Table 6-1: Flexmount Bearing Support and Mounting Bolt Sizes
General Procedure
1. Position a weigh module under each of the tank’s support legs or mounting lugs,
and slowly lower the tank onto the weigh modules. The jam nut and centering
washer on each weigh module’s hold-down bolt should be tightened against the
top plate so that no weight will be placed on the load cell.
2. Make sure that each load point on the tank is well supported by a weigh module’s
top plate and that all top plates are level within +1/16 inch. Otherwise, add shims
until each load point is supported and the top plates are level.
3. Bolt or weld the top plate of each weigh module to the support leg or mounting lug
that is resting on it. For welding use a 3/8-inch fillet, 1 inch long on 3-inch centers.
CAUTION
DO NOT PASS WELDING CURRENT THROUGH THE LOAD CELLS! WHEN WELDING
ON A SCALE, ALWAYS GROUND THE WELDING DEVICE AS CLOSE TO THE WORK AS
POSSIBLE. NEVER WELD CLOSER THAN 4 FEET (1.2 METERS) TO ANY LOAD CELL
WITHOUT REMOVING THE LOAD CELL.
4. Lower the tank onto the support foundation (concrete slab or support beam). Mark
the position of the base plate mounting holes on the foundation (see Figure 6-3).
METTLER TOLEDO can supply templates for the bolt holes.