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Transducer
The transducer should be installed, and connected, in accordance with the
installation instructions contained in the Transducer User Guide.
The entire range of, standard dB transducers are certified for use in
hazardous areas and different models, for each, are available for use in Zone
1 or Zone 0.
Wire the transducer to the Ultra 3’s transducer terminals, terminal numbers
will depend on the unit type, as follows:
If splicing, it is recommended using a junction box with standard twisted,
shielded pair at 20 AWG.
When using 2 core screened extension cable, the Black and Green wires of
the transducer should be connected to the screen of the extension cable.
When installing a transducer in a hazardous area use an approved transducer
suitable for the proposed application as detailed below:
FM
For EEx m (Zone 1) applications a transducer certified to FM Class I Div 1
Group A, B, C & D, ClassII Div 1 Group E, F & G, Class III is used, and
must be supplied via a 1500A breaking fuse, which is fitted as standard to
the Ultra 3.
Restrictions do not use in the presence of these groups of Chemicals,
Aliphatic Hydro Carbons, Ketones or Esters
For EEx ia (I.S.) a transducer certified to FM Class I Div 1 Group A, B, C
& D, ClassII Div 1 Group E, F & G is used, which must be connected to
the Ultra 3 via an external Zener barrier.
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