SEM104TC Datasheet, PDF (2/8 Pages) List of Unclassifed Manufacturers – SEM104 SERIES

SEM104P
Pt100 TEMPERATURE TRANSMITTER
1.0 DESCRIPTION
The SEM104P is a temperature transmitter designed to accept a standard platinum resistance sensor (Pt100
2 or 3 wire) to BS EN60751, BS1904 or DIN43760 and convert the temperature to industrial (4 to 20) mA.
It is housed in a purpose designed DIN standard connecting block enclosure.
The transmitters are available in 6 standard factory calibrated ranges, but the transmitter can be user
re-ranged to operate over most temperature ranges encountered in both industrial and building management
applications. Non standard ranges can be supplied to special order. The enclosure provides trim
potentiometer access, allowing fine re-calibration adjustments to be made at both ends of the scale.
2.0 SPECIFICATION @ 20 ºC
Input
Output
Loop Supply
Loop Resistance
Loop Protection
Loop Sensitivity
Accuracy
Temp Stability
Ambient Temp
Zero Drift
Span
Ambient Humidity
Connection
Cable Size
EMC
Pt100 sensor to BS EN60751, BS 1904 or DIN 43760 100 Ω @ 0 ºC.
FI = 38.5 Ω, 2 or 3 wire.
(4 to 20) mA loop powered, maximum 30 mA
(10 to 30) VDC
700 Ω @ 24 V
Reverse connection protected
10 µA/V
± 0.2 ºC plus ± 0.2 % of reading
Typically 0.05 % full range output/ºC
Typically 0.002 % full range output/ºC
(0 to 70) ºC operating
(-40 to 70) ºC storage
(0 to 95) % non condensing
Screw terminal
Recommended maximum wire 2.5 mm²
Conforms to BS EN 0081-1, BS EN50082-1
3.0 INSTALLATION
3.1 MECHANICAL
The transmitter is mounted using two 5.5 mm diameter holes, on standard 33 mm fixing centres. This
transmitter has been specifically designed to be mounted inside a DIN standard probe head enclosure,
which must provide adequate protection from moisture, corrosive atmosphere etc. All cable entries should
be sealed using the correct size cable gland. Care must be taken when locating the transmitter to ensure
the ambient temperature will remain inside the specified range of (0 to 50) ºC. The diagrams below and
overleaf show the mechanical layout and a typical application of the transmitter mounted inside a probe
head enclosure, with sensor wires entering through the centre hole.
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