Samson 3730-3 Safety Manual page 12

Electropneumatic positioner with hart communication 3730 series

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Required conditions

Particle size and quantity

Class 4

≤ 5 µm and 1000/m³

Tip

We recommend installing a supply pressure regulator/filter upstream of the positioner.

For example, the SAMSON Type 4708 Supply Pressure Regulator with 5 µm filter car-

tridge can be used.

Î The supply air line has a minimum inside diameter of 4 mm.

Select the cross section and length of the line to ensure that the supply pressure at the po-

sitioner on filling the actuator with air does not fall below the minimum limit.

Î The positioner is mounted as prescribed.

Î The vent opening at the back of the positioner remains open when the positioner is in-

stalled on site.

Electrical installation

Î The positioner is connected to the electric power supply properly as described in the

mounting and operating instructions.

Î Only cables whose outside diameters are suitable for the cable glands are used.

Î The electrical cables in Ex i circuits comply with the data that planning was based on.

Î The cable glands and cover screws are fastened tightly to ensure that the degree of pro-

tection is met.

Î The installation requirements for the applicable explosion protection measures are ob-

served.

Î The special conditions specified in the explosion protection certificates are observed.

Operation

Î When the optional inductive limit contact is used, Code 38 is set to YES.

Î The inductive limit contact is adjusted mechanically to meet the specifications.

Oil content

Pressure dew point

Class 3

≤ 1 mg/m³

–20 °C or at least 10 K below the lowest ambi-

ent temperature to be expected

SH 8384-3 EN

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