Specifications

METTLER TOLEDO Weigh Module Systems Handbook
(12/99)14-40
4.2 Top and bottom mounting plates shall be made of type 304 stainless
steel and have an electro-polished finish.
5 Load Cell Specifications
5.1 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.
5.2 OIML load cells can be offered as an option.
5.3 Load cells shall have the following individual characteristics:
5.3.1 Rated Capacity (R.C.): ____________
5.3.2 Rated Output: ____________
5.3.3 Zero Balance: ____________
5.3.4 Combined Error Due To
Non-Linearity & Hysteresis: ____________
5.3.5 Non-Repeatability: ____________
5.3.6 Temperature Compensation: ____________
5.3.7 Terminal Resistance
Input: ____________
Signal: ____________
5.3.8 Excitation Voltage: ____________
5.3.9 Insulation Resistance: ____________
5.3.10 Maximum Loads
Safe Overload: 150% of R.C.
Ultimate Overload: 300% of R.C.
Safe Side Load: 100% of R.C.
5.3.11 Gauge Cavity & Wiring Seal Type: ____________
(potted or hermetic) seal
5.4 Each load cell shall have an integral conduit fitting on the cable
entrance into the load cell for enhanced moisture protection.
5.5 Each load cell shall have a data plate affixed to the load cell which
clearly shows:
5.5.1 Manufacturer
5.5.2 Capacity
5.5.3 Part Number
5.5.4 Serial Number
5.5.5 Class Number
5.5.6 NTEP Certificate of Conformance Number
5.5.7 Maximum Divisions (Nmax)
5.5.8 Load Cell Vmin
5.6 Load cells shall be mounted to the base plate with high strength
grade 5 bolts minimum.
6 Junction Box Specifications
6.1 Junction box enclosure shall be constructed of type 304 stainless
steel and shall be designed to NEMA 4X/IP65 standards.
6.2 The junction box enclosure shall have washdown duty connectors,
one for each load cell cable, and one additional connector for the
instrument cable. Multiple cables using single box connectors are not
acceptable.
6.3 The junction box shall contain a printed circuit board for the purpose
of individual load cell wiring termination, summing of the output
signals from each load cell, trimming/balancing the load cell signals,
and wiring the interface to the digital instrument.
6.4 The printed circuit board shall have individual connectors for each of
the load cells, and the instrument interface cable. Each wire shall