Equipotential Bonding (Eb); Operating Environment - Mettler Toledo IND256 Série Guide D'installation

1.6.4. Warnings
1.6.4.1. CENELEC
Connection of EB per Country-Specific Regulations: It must be ensured that the housings of all
devices are connected to the same potential via the EB terminals. No circulating current may flow
via the shielding of the intrinsically safe cables.
1.6.4.2. cFMus
Connection of EB per ANSI/NFPA 70, Article 504, and ANSI/IA RP 12.06.01 or Canadian Electric
Code C22.2: It must be ensured that the housings of all devices are connected to the same
potential via the EB terminals. No circulating current may flow via the shielding of the intrinsically
safe cables.
1.7.

Equipotential Bonding (EB)

Equipotential bonding must be installed by an electrician authorized by the owner. METTLER
TOLEDO Service performs only a monitoring and consulting function for this procedure.
Connect equipotential bonding of all devices (power supply unit, weighing terminal, interface
converter and weighing platform) in accordance with the terminal diagram and all country-specific
regulations and standards. In the process, it must ensure that:
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1.8.

Operating Environment

When selecting a location:
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1.8.1.1. Temperature and Humidity
The IND256x can be stored and operated at temperatures and relative humidity conditions as listed
in Table 1-1.
1.8.1.2. Environmental Protection
The IND256x terminal has environmental protection as listed in Table 1-1.
1-10 METTLER TOLEDO IND256x Weighing Terminal Installation Manual
All device housings are connected to the same potential via the EB terminals.
No circulating current flows via the cable shielding for intrinsically safe circuits.
The neutral point for equipotential bonding is as close to the weighing system as possible.
Choose a stable, vibration-free surface to mount the terminal
Ensure there are no excessive fluctuations in temperature and there is no direct exposure to
sunlight
Avoid drafts on the weighing platform (for example, from open windows or air conditioning)
Calibrate the terminal after any major change of geographical location
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