SMART PT-100 TEMPERATURE TRANSMITTER  SEM205P

SEM205P Temperature Transmitter
  • Potted
  • Sensor Matching
  • Easily Re-Programmable
  • In Loop Interrogation
  • PC Configurable
  • Low Cost
  • FM IS Version

 
INTRODUCTION
The SEM205P is an encapsulated low cost 'Smart' in head temperature transmitter that accepts PT100 temperature sensors and converts the output to the industry standard 4 to 20 ma transmission signal.   It can be mounted directly in a connection head of a sensor assembly, in a separate remote junction box, or on a DIN rail using optional mounting clips.

The SEM205PX version carries both FM and CENELEC intrinsically safe approvals when used with the appropriate barriers.

Ranges and other parameters are easily programmed using a "Windows™" based software package without the need for recalibration.   If range is not specified at time of order the default settings are 0-100 ºC, adaptive filtering, Pt100 - DIN 385, and upscale burnout.

In addition to the standard RTD inputs it is possible to customize the input range and linearization.  This is done at the factory using the "X" input option.

The "Adaptive" filter function adjusts the incoming signal to noise ratio in order to achieve the appropriate level of filtration.  A slowly changing signal will be heavily filtered until there is a sudden change.  The filter then quickly reduces allowing for rapid response.  Other filter settings are off, 2 seconds and 10 seconds.

The user programmable offset along with the sensor referencing feature allow the sensor and transmitter to be calibrated together for the best performance.


INPUT SPECIFICATION @ 68 °F

.RTD (Pt100)
.Sensor .Pt100 to BS EN 60751
.100 ohms at 32 °F 2 or 3 wire
.Sensor Range .-328 to +1562 °F [18-390 ohms]
.Minimum Span .50 °F
.Linearization Standard .BS-EN60751 / BS1904 / DIN43760 /
.JISC 1604-1
.Linearization Custom .Consult Sales Office  [X] option
.Basic Measurement Accuracy .±0.18 °F (±0.1 °C) ±0.05% Reading
.Thermal Drift .Zero = 0.008 °F/°F
.Span = 50 ppm/°F
.Excitation Current .1 ma max.
.Maximum lead resistance .50 ohms/leg
.Lead resistance effect .0.004 °F/ohm

OUTPUT

.Output Range .4 to 20 ma (>3.8 to <20.2 ma)
.Max. Output .23 ma
.Accuracy .±5 µA
.Voltage effect .0.2 µA/V
.Thermal drift .0.05 µA/°F
.Supply voltage .10 to 35 V
.Max. output load .[(V supply - 10)/20] K ohm
.(700 ohms @ 24 V)

GENERAL SPECIFICATIONS

.Update time .1 second to final value
.Filter Factor Programmable: .Off, 2 second, 10 second
.Or Adaptive
.Stability .0.1% Full Range Input or 0.2 °F / year
.Case Size .43 mm dia. x 21 mm
.Enclosure .Molded case NORYL
.Flammability .SEI UL94 V1 rated

APPROVALS

.EMC .Emissions .BS EN 50081
.Susceptibility .BS EN 50082
.Hazardous area .FM3610 & IS EEx ia T4..T6

ENVIRONMENTAL

.Ambient operating range .-40 to 185 °F
.Ambient storage temperature .-58 to 212 °F
.Ambient humidity range .0 to 100% RH non-condensing

ENCLOSURE

.Material .NORYL™
.Flammability .SEI UL94-V1

COMMUNICATIONS

The transmitter is accessed via the comms interface adapter for reprogramming or examination of the process variable and Sandeliusinformation.  The interface adapter converts the special communications signals on the transmitter power connection cable to the standard RS232 in order to connect directly to a PC serial port.   There are two methods of connecting the interface adapter to the transmitter i.e. using the adapter's own power supply or using the power from an existing loop.  Power supply must be capable of supplying 40 ma when powered from the loop.  If other RCPW driver products have been purchased, RCPW latest upgrade is available free of charge via the internet.
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.PC Interface .RS 232 via interface adapter
.Comms protocol .ANSI X3.28 1976
.Data Rate .1200 baud
.Minimum output load .100 ohms for "in loop" programming
.Maximum cable length .1000 meters
.Configurable Parameters .Sensor type: Burnout: ºC/ºF: Output: Hi/Lo: Filter: Tag: User offset
.Software .RCPW

SEM205P Instruction Manual


ORDER CODE

.SEM205P Standard Unit
.SEM205PX Approved for Hazardous Area Use to FM3610 and EEx ia IIC T4..T6
.CONFIG 205 Pre Configured to Specified Range (State Range on Order)
.RCPW-205-USA Programming Kit for SEM205
.Consisting of: I/F Adapter Box RCPW Software PSU and Carry Case
.(Kit for USA/Canada)

 

Call (713) 861-1100 for literature and pricing. If you prefer to ask for information via the internet, email info@sandelius.com.

 

© 2001 Sandelius Instruments, Inc. - All Rights Reserved