SMAR TT400WH, Руководство пользователя

Страница: 20 / 46

TT400 WirelessHART ® - Operation, Maintenance and Instruction Manual
1.6
Installation in Hazardous Locations
WARNING
Explosions could result in death or serious injury, besides financial damage. Installation of this
transmitter in explosive areas must be carried out in accordance with the local standards and the
protection type adopted. Before continuing the installation make sure the certificate parameters are
in accordance with the classified area where the equipment will be installed.
The instrument modification or parts replacement supplied by other than authorized representative of
Smar is prohibited and will void the certification.
The transmitters are marked with options of the protection type. The certification is valid only when the
protection type is indicated by the user. Once a particular type of protection is selected, any other type
of protection can not be used.
The electronic housing and the sensor installed in hazardous areas must have a minimum of 6 fully
engaged threads. Lock the housing using the locking screw (Figure 1.3).
The cover must be tightened with at least 8 turns to avoid the penetration of humidity or corrosive
gases. The cover must be tightened until it touches the housing. Then, tighten more 1/3 turn (120 ° ) to
guarantee the sealing. Lock the covers using the locking screw (Figure 1.3).
Intrinsically Safe
WARNING
In hazardous areas with intrinsically safe or non-incendive requirements, the circuit entity parameters
and applicable installation procedures must be observed.
The configurator data to guarantee the intrinsically safe parameters are:
Uo(max.) = 5 V
Io(max.) = 100 µA
For free access to the HART bus in the explosive environment, ensure the instruments in the loop are
installed in accordance with intrinsically safe or non-incendive field wiring practices.
It is not recommended to remove the transmitter cover when the power is ON.