Samson 3730-2 - Technical Data

EB 8384-2 EN 29
Design and principle of operation
3.6 Technical data
Table12: Type3730-2 Electropneumatic Positioner
Type3730-2 Positioner
The technical data for the explosion-protected devices may be restricted by the
limits specied in the test certicates.
Valve
travel
Adjustable
DirectattachmenttoType3277Actuator 3.6to30mm
AttachmentaccordingtoIEC60534-6(NAMUR) 3.6to300mm
AttachmentaccordingtoVDI/VDE3847 3.6to300mm
Attachmenttorotaryactuators(VDI/VDE3845) 24 to 100° opening angle
Travel
range
Adjustable
Adjustablewithintheinitializedtravel/angleofrotationofthevalve;travelcanbe
restrictedto1/5atthemaximum.
Set point
w
Signal range 4to20mA·Two-wiredevice,reversepolarityprotection·Minimumspan4mA
Static destruction limit 100mA
Minimum current 3.6 mA for display · 3.8 mA for operation
Load impedance
Withoutexplosionprotection:≤6V(correspondingto300Ωat20mA)
Explosion protection: ≤7V(correspondingto350Ωat20mA)
Supply
air
1.4to7bar(20to105psi)
Air quality acc. to
ISO 8573-1
Max. particle size and density: Class 4 · Oil content: Class 3 · Pressure dew point:
Class 3 or at least 10 K below the lowest ambient temperature to be expected
Signal pressure (output)
0baruptothesupplypressure·Canbelimitedto1.4bar/2.4bar/3.7bar
±0.2barbysoftware
Charac-
teristic
Adjustable
Linear/Equalpercentage/Reverseequalpercentage
User-dened(overoperatingsoftwareandcommunication)
Butteryvalve,rotaryplugvalveandsegmentedballvalve:Linear/equalpercent-
age
Deviation ≤1%
Hysteresis ≤0.3%
Sensitivity ≤0.1%
Transit time Ventingorllingwithairadjustableseparatelyupto240sbysoftware
Direction of action Reversible
Air consumption, steady state Independentofsupplyairapprox.110l
n
/h
Air
output
capacity
Tollactuatorwith
air
AtΔp=6bar:8.5m
n
³/h·AtΔp=1.4bar:3.0m
n
³/h·K
Vmax(20°C)
=0.09
To vent actuator AtΔp=6bar:14.0m
n
³/h·AtΔp=1.4bar:4.5m
n
³/h·K
Vmax(20°C)
=0.15
Permissible ambient temperature
–20to+80°C All versions
–45to+80°C Withmetalcablegland
The temperature limits for the explosion-protected devices may be restricted by
the limits specied in the test certicates.