RIDGID metal detector Guia do Utilizador descarregar pdf (Página 58)

Installation

Setting Up Reject Mechanisms

The conveyor system is supplied with the reject mechanism correctly set up. Normally, no further

adjustment should be required. If adjustment is required see Adjusting the Reject Mechanisms

for

further details.

If the reject Delay and Dwell times need to be adjusted, these are set up via the user interface from

the control panel. See Adding a New Product

Adding a New Product for further details.

Remote User Interface

The electronic controls for the metal detector are integrated into the search head along with the user

interface, but the user interface can be mounted remotely in it‘s own housing where access would

otherwise be difficult.

Two versions of remote user interface are available, one with an on-board power supply and one

without. The model with the on-board power supply must be used where the cabling between the

search head and user interface exceeds two metres in length.

Care must be taken when routing the cabling to the remote user interface to observe good EMC

practice – do not run with mains or high energy switching cables.

Installing a Serial Link

The main control electronics board must have the optional serial link board fitted.

In order to use any of the serial link options your detector will require a cable and connector assembly

which facilitates external connection to the on board serial link electronics. The connector is normally

located on the underside of the control box.

If a serial link option was ordered with your detector the necessary internal cables and external socket

complete with a blank mating external plug and connection diagrams will be supplied. If you wish to

add a serial link to an existing system please contact your local Service Centre who will be pleased to

assist. See the Setting Up Serial Links

Setting Up Serial Links section for further details.

Site Considerations

Electromagnetic Compatibility (EMC)

All Loma machines are designed, and tested, to operate under factory conditions and have been

tested to recognised international standards for Electromagnetic Compatibility (EMC), both in terms of

not emitting excessively and not being subject to undesirable operation in the presence of other

equipment whose emissions also meet the standards.

This approach allows Loma to offer stable operation, even in RF noisy environments, provided the

other equipment is to the same standards and the field wiring is suitably ‘hard’.

It is still necessary, however, to ensure that the machine is not subjected to excessive electrical noise

via its supply or airborne sources.

Selection of Frequency Band

If two or more metal detectors sited within the same area are operating at the same frequency, then

they will interfere with each other leading to false rejects and unstable operation.

To overcome this problem, the detectors can be set to operate on one of ten different bands through

the Menus > Service > Configuration > Head menu Search Head Setup screen. It is therefore very

important to ensure that detectors operating near one another are set to operate at different bands.

See Frequency Selection

Frequency Selection for further details.

Other EMC considerations

Any signal I/O which is connected to the auxiliary connections should be in screened cable, grounded

at one end by a low impedance path to RF, and kept free from sources of electrical noise (e.g. mains

supplies for large electrical machines).

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