SMAR LD290, Operation And Maintance Manual

Page: 17 / 66

Installation
1.11
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 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 1.4).
Consult the Appendix A for further information about certification.
Explosion/Flame Proof
WARNING
Only use Explosion Proof/Flameproof certified Plugs, Adapters and Cable glands.
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.
The standard plugs provided by Smar are certified according to CEPEL certificate. 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.
For NEMKO ATEX certificate please to follow the installation guidelines in hazardous locations
below: Group II Category 2G, Ex d, Group IIC, Temperature Class T6, EPL Gb U = 28VDC
Ambient Temperature: -20 to 60ºC for T6
Environmental Protection: IP66/687 or IP66W/687W
The electrical connection available are ½ - 14NPT and M20x1,5.
Cable entries must be connected or closed using metal cable gland and metal blanking plug, both
with at least IP66 and Ex-d certification or any appropriate ATEX approved metal cable gland and
metal blanking plug. 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.
It is not recommended to remove the transmitter cover when the power is ON.