Specifications

METTLER TOLEDO Weigh Module Systems Handbook
(12/99)14-56
Tension 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
Section 1.1 can be found in Table 14-37 for capacities in pounds (Table 14-38 for
capacities in kilograms). Information for the blanks in Sections 4.3.1 to 4.3.9 can be
found in Table 14-39.
1 General Provisions
1.1 Provide a complete system consisting of ______ (qty) ______ lb/kg
tension weigh modules.
1.2 Each module shall include S-cell, clevis pins, clevis, jam nuts, rod
ends, and hair-pin cotters.
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.
2 Mechanical Specifications
2.1 The load cells shall be positioned around the vessel so that each
support point carries an equal portion of the load.
2.2 Tension weigh module assemblies shall include a spherical rod end
bearing/clevis attachment on both ends of the load cell to
compensate for any misalignment of support rods.
2.3 Each tension weigh module in a system shall share an equal portion
of the gross load. Space the modules accordingly.
2.4 Always use a secondary safety support system of chains or rods to
prevent the vessel from falling in case of tension weigh module
component failure.
3 Material and Finish Specification
3.1 Load cells shall be made of 17-4ph stainless steel.
3.2 Clevis, hitch pin, and rod end bearing shall be electroless nickel or
zinc plated.
3.3 Pivoting ball in rod end shall be alloy steel, heat treated, and hard
chrome plated.
4 Load Cell Specifications
4.1 All load cells shall meet or exceed the National Institute of Standards
and Technology (NIST) Handbook 44 for Class III weighing devices
and shall be certified by the National Type Evaluation Program
(NTEP) for 3,000 division Class III accuracy.
4.2 OIML load cells can be offered as an option.
4.3 Load cells shall have the following individual characteristics:
4.3.1 Rated Capacity (R.C.): ____________
4.3.2 Rated Output: ____________
4.3.3 Zero Balance: ____________
4.3.4 Combined Error Due To
Non-Linearity & Hysteresis: ____________
4.3.5 Non-Repeatability: ____________
4.3.6 Temperature Compensation: ____________
4.3.7 Terminal Resistance
Input: ____________
Signal: ____________
4.3.8 Excitation Voltage: ____________
4.3.9 Insulation Resistance: ____________
4.3.10 Maximum Loads
Safe Overload: 150% of R.C.