INPUT SENSORS AND RANGES
RTD (Pt100)
Sensor Range (-200 to 850) °F, (18 to 390 Ω)
Minimum Span*¹ 25 ºC
Linearisation BS-EN60751 BS1904 DIN43760 JISC 1604
CUSTOM [X]*³
Basic Measurement Accuracy ± 0.01 % FRI ± 0.05 % rdg
FRI = Full Range Input
Thermal Drift Zero 0.008 °C/°C
Span 0.01 %/°C
Excitation Current (300 to 550) μA
Maximum Lead Resistance 50 Ω/leg
Lead Resistance Effect 0.002 °C/Ω
Basic Measurement Accuracy*² ± 0.04 % FRI ± 0.04 % rdg or
0.5 ºC (whichever is greater)
Linearization BS 4937/EC 584-3
Cold Junction Error ± 0.5 °C
Cold Junction Tracking 0.05 °C/°C
Cold Junction Range (-40 to 85) ºC
Thermal Drift Zero 0.1 μV/°C
Span 0.01 %/°C
MILLIVOLTS
Input Voltage source
Range (-10 to 75) mV
Characterisation Linear Custom [X]*³ (5th Order Polynomial)
Minimum Span*¹ 5 mV
Basic Measurement Accuracy*² ±10μV ±0.07% rdg
Input Impedance 10 MΩ
Thermal Drift Zero 0.1 μV/°C
Span 0.01 %/°C
SLIDEWIRE
Input 3 wire potentiometer
Resistance Range (10 to 390) Ω [End to End]
(Larger values can be accommodated by fitting an external resistor)
Characterisation Linear Custom [X]*³ (5th Order Polynomial)
Minimum Span*¹ 5 %
Basic Measurement Accuracy*² 0.1 %
Temperature Drift 0.01 %/ºC
OUTPUT
Output Range < 3.8 to > 20.2 mA
Max Output 23 mA
Accuracy ± 5 μA
Voltage Effect 0.2 μA/V
Thermal Drift 1 μA/°C
Supply Voltage (10 to 35) V
Max. Output Load [(V supply -10)/20] KΩ
(700 Ω @ 24 V) |
Description:
The SEM210 is a second generation ‘Smart’ Universal input in-head
temperature transmitter that accepts any commonly used
temperature sensor, Slide wire transducer or Millivolt signal and converts
the output to the industry standard (4 to 20) mA transmission signal. The
sensor type and range are easily programmed using a PC and a simple Windows
based software program. Connection from the PC serial port is made using the
same wires that carry the (4 to 20) mA output signal. This simplifies
connection and allows for re-programming or interrogation of the SEM210
while it is installed in the loop. Sensors can be changed without the need
for re-calibration. Isolation is a standard feature, removing all ground
loop effects as the input is electrically and physically isolated from the
loop power supply (see the schematic below). The use of two micro-processors
results in error free data transmission across
the isolation barrier. The very small size coupled with the versatility of
this universal transmitter make it the ideal choice for every temperature
measurement application, resulting in lower inventory, greater operational
flexibility and, in common with our other products, a low cost of ownership.
SEM210X also offers ATEX approved option.
Click to download technical specification/manual.
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