Mass Technologies, Inc.

P.O. Box 173187

Arlington, TX 76003-3187

 

SEM 104
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User Re-Rangeable
Low Cost
Pt100 Inputs
T/C Input K, T, or J
EMC Tested

LOW COST TEMPERATURE TRANSMITTER  SEM104
INTRODUCTION
The SEM104 series are low cost 4 to 20 mA temperature sensor transmitters housed in a head mount DIN standard connector block.  Available for Pt100 or Thermocouple inputs the SEM104 is field rangeable if necessary by solder links on the printed circuit board and the use of on board SPAN and ZERO potentiometers.  The transmitters are low cost devices available in standard, factory calibrated ranges and can be re-ranged to suit most industrial and Building Management applications.

GENERAL SPECIFICATIONS @ 68 °F

.Output .4 to 20 mA loop powered, Max. 30 ma
.Loop Supply .10 to 30 VDC reverse connection protected
.Loop Resistance .700 ohms @ 24 V
.Loop Volts Sensitivity .0.05%/V
.Temperature Stability .ZERO drift = 0.01%/°F
.SPAN = 0.002%/°F
.Ambient Temperature .32 to 150 °F at 24 V supply 250 ohm load
.Ambient RH .0 to 95% RH non condensing
.EMC Compatibility .Emissions = BS.EN 50081
.Susceptibility = BS.EN 50082

INPUTS

.SEM104P PLATINUM RESISTANCE SENSOR
.Sensor .100 ohm - 3 wire - alpha = 0.00385 ohms
.Accuracy .±0.4 °F plus +0.2% of reading
.Offset adjustment .range dependant
.Span adjustment .76 °F to 932 °F

 

.SEM104K, T or J THERMOCOUPLE SENSOR (ISOLATED JUNCTION)
.Accuracy .±0.1% FS plus cold junction errors non-linearized
.Offset adjustment .±200 °F, solder link & potentiometer
.Span adjustment .212 to 1832 °F
.Impedance .>1M ohm
.Burn Out .Upscale standard, Downscale by link
.Cold Junction .Automatic 32 to 158 °F
  .Accuracy 0.4 °F @ 68 °F, tracking +0.02 °F/°F
.Thermocouple Types .J = Iron / Constantan
  .T = Chromel / Constantan
  .K = Chromel / Alumel

STANDARD RANGES °F

Range °F SEM104P   SEM104K SEM104T SEM104J
-40 to +140     * * *
-100 to +100 *     *  
0 to 200 *   * * *
0 to 300 *   * * *
0 to 500 *   * * *
0 to 750 *   * * *
0 to 1000 *   *   *
0 to 1500 *       *

STANDARD RANGES °C

Range °C SEM104P   SEM104K SEM104T SEM104J
-30 to +35 *        
-25 to +75 *        
0 to 50 *        
0 to 100 *   * * *
0 to 150 *   * * *
0 to 200 *   * * *
0 to 250 *   * * *
0 to 400 *   * * *
0 to 500 *   *   *
0 to 600     *    
0 to 800     *    
0 to 1000     *    

Other ranges can be supplied factory set or they can be configured by the use of solder links on the SEM pcb.  Full details are supplied with each transmitter.

DOWNLOADS
SEM104P Instruction Manual

SEM104TC Instruction Manual

SEM104 Literature


ORDER CODE

SEM104  /  SENSOR  /  Lo RANGE   /  Hi RANGE  /  °F or °C

Example:
SEM104/K/0/200/F is the code for an SEM104 with type K thermocouple input with 4 to 20 ma output over the range of 0 to 200 °F

 

 

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