Application; Safety; Installation - Mettler Toledo 3390 GageMount Manual Del Usario

1 Application

The products listed in the Appendix are non-electrical weigh modules, their options and load cell accessories. They provide a convenient
means of mounting load cells to various platforms, tanks & hoppers to create a weighing scale. In potentially explosive atmospheres
they must be used with load cells that are independently and appropriately approved for the purpose; this applies also to junction
boxes, barriers, terminals and other equipment which may be included as part of the system.
The non-electrical weigh module hardware, weigh module options and load cell accessories listed in the Appendix are suitable for use
in haz-ardous areas of Zones 1 and 2 and Zones 21 and 22 when used under the following conditions and in accordance with the
Instructions contained herein:
Group:
Category:
Materials:
Temp. Class:
Max. Surface Temp:
Ambient Temp:
Note that the load cells are approved independently for use in hazardous areas and these approvals must be reviewed for suitability in
any given environment.
Mettler-Toledo has performed the Ignition Hazard Assessment required in EN 13463-1 and found that the non-electrical weigh module
hard-ware, weigh module options and load cell accessories fall outside the scope of the ATEX directive 94/9/EC when installed according
to this document. Hence, there are no ATEX markings on the products, other than those on the load cells. Dekra Certification B.V. reviewed
the Hazard Assessment and indicated their concurrence by issuing Attestation of Conformity number KEMA 211129000.
Go to http://www.mt.com to get copies of the latest certificates, drawings, Attestation of Conformity and Declarations of Conformity.

2 Safety

No modifications may be made to the products in the Appendix and the use of components not complying with the specifications is
prohibited.
Repairs may be made only by trained and authorized personnel.
Comply with the product's Installation Instructions and the following:
• Regulations and standards for the respective country
• Regulations and standards for electrical and mechanical systems in hazardous areas for the respective country
• All instructions related to safety issued by the owner.
Avoid static electricity build-up on non-conductive parts at all times. In particular, avoid any highly efficient charge generating mechanisms
to avoid propagating brush discharges. See also cleaning instructions in section 5.

3 Installation

Only install or perform maintenance work on the weighing system in the hazardous area if the following conditions are fulfilled:
• The intrinsically safe characteristic values and zone approval of the individual components are in accord with one another.
• The owner has issued a permit ("spark permit" or "fire permit").
• The area has been rendered safe and the owner's safety coordinator has confirmed that there is no danger.
• The necessary tools and any required protective clothing are provided (danger of build-up of static electricity).
Perform the installation in accordance with the product's general installation instructions.
In the Hazard Assessment of products with lift-off features, scale lift-off (tipping) was classified as a Rare Malfunction. If lift-off is
considered to occur more frequently, this should be eliminated by, for example, the application of check rods to prevent lift-off of the scale.
Note: On GageMount™ 15-100t lift-off protection is an option; CenterLign™ and GageMount™ 200-500t do not have lift-off protection
which must be provided externally in all cases where required.
30104376C Installation Instructions
II
2 & 3
Gas & Dust
T4
135°C
-40°C ≤ Ta ≤ +50°C
3
Application