Installation
1.13
Installation in Hazardous Areas
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 I n
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 1.4).
The cover must be tighten with at least 8 turns to avoid the penetration of humidity or corrosive gases.
The cover must be tighten until it touches the housing. Then, tighten more 1/3 turn (120) to guarantee
the sealing. Lock the covers using the locking screw (Figure 1.4).
Consult the Appendix A for further information about certification.
Explosion/Flame Proof
WARNING
In Explosion-Proof installations the cable entries must be connected or closed using metal cable gland
and metal blanking plug, both with at least IP66 and Ex-d certification.
As the transmitter is non-ignition capable under normal conditions, the statement “Seal not Required”
could be applied for Explosion Proof Version. (CSA Certification).
The standard plugs provided by Smar are certified according to the standards at FM, CSA and CEPEL.
If the plug needs to be replaced, a certified plug must be used.
The electrical connection with NPT thread must use waterproofing sealant. A non-hardening silicone
sealant is recommended.
Do not remove the transmitter covers when power is ON.
Intrinsically Safe
WARNING
In hazardous zones with intrinsically safe or non-incendive requirements, the circuit entity parameters
and applicable installation procedures must be observed.
To protect the application the transmitter must be connected to a barrier. Match the parameters
between barrier and the equipment (Consider the cable parameters). Associated apparatus ground
bus shall be insulated from panels and mounting enclosures. Shield is optional. If used, be sure to
insulate the end not grounded. Cable capacitance and inductance plus C
i
and L
i
must be smaller than
Co and Lo of the associated Apparatus.
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. Use only Ex Hart
communicator approved according to the type of protection Ex-i (IS) or Ex-n (NI).
It is not recommended to remove the transmitter cover when the power is ON.
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