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Saving you time & money solving challenging problems!
Static Control for Safe Operation of Process Machinery
Earth-Rite MULTIPOINT
- Self testing system
- Insures correct grounding
- Monitors up to 8 points
- LED status indication
- Includes interlock control contact(s)
- Intrinsically safe
- ATEX certified, FM pending
- Suitable for fixed and temporary clamped connections
Typical risks exist with items of process plant incorporating sections which must be removed periodically for cleaning or other purposes. An example of this is the product bowl on a Fluid Bed Dryer, but there are many other similar applications such as ductwork sections, conveying systems etc.
Removable parts may become isolated conductors if they do not have a sufficiently low resistance path to earth to enable any static generated to safely dissipate. If this happens, high levels of charge may accumulate on the isolated part posing the risk of energetic static discharges (sparks). If this occurs in a hazardous atmosphere there will be a chance of a resulting fire, explosion or dangerous physiological shocks for operators.
The Earth-Rite MULTIPOINT solves these problems by ensuring that all parts of the equipment are connected together and to earth by using a unique intrinsically safe monitoring system. An important design criterion of the Earth-Rite MULTIPOINT ensures that the sum of all circulating currents does not compromise the intrinsic safety of the monitoring system. This is achieved by supplying the monitoring system from a single I.S. supply, which may be used to monitor up to eight separate points.
The system provides permissive outputs only when the earth loop resistance of each utilised channel is less than 10 Ohms, as recommended in the various International standards for the control of undesirable static electricity. The Earth-Rite MULTIPOINT may be used to provide status indication for the equipment, or automatically linked back to a control system to prevent operation until the required bonding and earthing conditions have been achieved. The system is ATEX approved for use in hazardous atmospheres and meets all current EC directives. FM approval pending.
Brief Specification
| Approvals & Certification | Monitoring Unit: (ATEX) II 1 GD EEx ia IIC T4 Power Supply / Interface: (ATEX) II 1 GD [EEx ia] IIC |
| No. of Monitored Points | Up to 8 (hard wired or via clamps) |
| Monitored Resistance | Setpoint: 10 ohms (each point) |
| Status Indication | Red & green LEDs for each point |
| Interlock Contacts | Standard: one common contact ouput; Option: individual contacts |
| Options: | Ground monitoring clamps and cables, plug & socket connectors, etc. |
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