Mettler Toledo LJ16 Spécifications télécharger pdf (Page 148)

METTLER TOLEDO Weigh Module Systems Handbook

(12/99)14-28

Appendix 11:

Engineering

Specifications

This appendix contains engineering specifications for Model 0958 Flexmount weigh

modules, Model 0958 Flexmount HD weigh Modules, Model 0958 Centerlign weigh

modules, Model 0972 Ultramount weigh modules, Model VLM2 Value Line weigh

modules, and Model 0978 Tension weigh modules.

Flexmount Weigh Modules

The portions of this specification that have been left blank ( __________ ) should be

filled with information about the specific application. Information for the blanks in

Sections 1.1 and 5.3.11 can be found in Table 14-21 (Table 14-23 for OIML

applications). Information for the blanks in Sections 5.3.1 to 5.3.9 can be found in

Table 14-22 (Table 14-24 for OIML applications). If carbon steel weigh modules are

specified in Section 1.1, use the Material and Finish Specifications for carbon steel

weigh modules (Section 3). If stainless steel weigh modules are specified in Section

1.1, use the Material and Finish Specifications for stainless steel weigh modules

(Section 4).

General Provisions

1.1

Provide a complete system consisting of ______ (qty) ______ lb/kg

_______________ (carbon steel or stainless steel) weigh modules to

convert a freestanding structure into a scale.

1.2

Each module shall include load cell, top and bottom mounting plates,

self-aligning suspension, and anti-lift restraints.

1.3

The system shall include a stainless steel NEMA 4X/IP65 summing

junction box.

1.4

Each weigh module shall be completely factory assembled.

Mechanical Specifications

2.1

The system shall be completely self-checking. No additional check

rods, links, or stays are required.

2.2

One module of the system shall be of a fixed-pin design so that all

vessel movements, including those caused by thermal expansion and

contraction, will be relative to that point. The influence of any

plumbing (inlet/outlet pipes, etc.) attached to the vessel at the fixed-

pin location shall have a minimal influence on weigh vessel

accuracy.

2.3

One module of the system shall be of a semi-floating design to allow

for movement of the vessel due to thermal expansion toward and

away from the fixed-pin module. This module shall also provide anti-

rotational vessel checking in a horizontal plane.

2.4

All remaining modules shall be of a full-floating design, allowing the

top mounting plates to move laterally in all directions without

imposing a side force on the cells, which would produce weighing

errors.

2.5

The load point on each load cell shall remain stationary. Modules

shall be designed to allow movement of the module top mounting

plate without changing the load point on the load cell, or allowing the

load introduction mechanism between the top plate and the load cell

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