Samson TROVIS 3730-1 Notice De Montage Et De Mise En Service page 134

9. This certificate relates to the design, examination and testing of the products specified herein. The FM
Approvals surveillance audit program has further determined that the manufacturing processes and quality
control procedures in place are satisfactory to manufacture the product as examined, tested and Approved.
10. Equipment Ratings:
Intrinsically Safe for Class I, II, III, Division 1, Groups A, B, C, D, E, F, and G hazardous (classified)
locations in accordance with drawing EB 8484-1, Intrinsically Safe for Class I, Zone 1, Group IIC hazardous
(classified) locations in accordance with drawing EB 8484-1; Nonincendive for Class I, II, III, Division 2,
Groups A, B, C, D, F and G hazardous locations, indoors and outdoors (Type 4X, IP66) with an ambient
temperature rating per the table in Section 12 below
11. The marking of the equipment shall include:
IS Class I, II, III, Division 1, Groups A, B, C, D, E, F, G; T* Ta*
IS Class I, Zone 1, AEx ia IIC T* Gb
NI Class I, II, III, Division 2, Groups A, B, C, D, F and G; T* Ta*
Type 4X; IP66
For Entity and NIFW parameters – refer to document no. EB8484-1
T* - See below
Description of Equipment:
12.
General – The TROVIS 3730-1 Positioner is a single acting positioner for attachment to pneumatic control
valves. The positioner mainly consists of a non-contact travel sensor system, an i/p converter and the
electronics with the microcontroller. The valve position is transmitted either as an angle of rotation or a
travel to the pick-up lever, from there to the travel sensor and forwarded to the microcontroller. The PID
algorithm in the microcontroller compares the valve position measured by the travel sensor to the 4 to 20
mA DC control signal issued by the control system after it has been converted by the AD converter. In
case of a set point deviation, the i/p converter causes the actuator to be either vented or filled with air. As a
result, the closure member of the valve is moved to the position determined by the reference variable. The
pneumatic module is supplied with supply air and the flow rate of the module's output can be restricted by
software
Construction - The Type TROVIS 3730-1 Positioner mainly consists of the electronics part. The parts are
assembled in an enclosure made of aluminium die cast or stainless-steel die cast. The enclosure has a
cover with a polymeric inspection window. As an alternative to the polymeric material, the window can be
made from aluminium. The enclosure has an ingress protection rating of Type 4X and IP66
THIS CERTIFICATE MAY ONLY BE REPRODUCED IN ITS ENTIRETY AND WITHOUT CHANGE
FM Approvals LLC. 1151 Boston-Providence Turnpike, Norwood, MA 02062 USA
T: +1 (1) 781 762 4300 F: +1 (1) 781 762 9375 E-mail:
F 347 (Apr 21)
15-18
SCHEDULE
US Certificate Of Conformity No: FM21US0096
information@fmapprovals.com www.fmapprovals.com
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EB 8484-1 FR