Specifications

Setting up the MVDs
The MVDs work best if they are mounted on signals on the near side of the road.
A vehicle approaching the MVD, within the range given on page 5, should be detected. The indicator
will be illuminated on the MVD (see page 5). If this does not happen, check the alignment and readjust
as necessary. If the indicator still does not illuminate when the next vehicle approaches, call out the
service engineer.
If the indicator stays on regardless of approaching vehicles, the MVD probably needs replacing – call
the service engineer.
Specifications MCE 0114(C), TR 2147 and TR 2504 require that, if a detector has not registered a
demand for 2.5 minutes, the detector generates a demand via its ‘nudge circuit’. This will mean that
at quiet times the signals will change at least every two and a half minutes.
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