Samson 3730-3 - Technical Data

EB 8384-3 EN 27
Design and principle of operation
3.7 Technical data
Table12: Type3730-3 Electropneumatic Positioner
Type3730-3 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 ≤8.2V(correspondsto410Ωat20mA)
Supply air
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
–55to+80°C Special version for low temperatures with metal cable gland
(Type3730-3xxxxxxxx0x02x0xx)
The temperature limits for the explosion-protected devices may be restricted by
the limits specied in the test certicates.