Temperature Measurement
Transmitters for rail mounting
SITRANS TR300
two-wire system, universal, HART
3/38
Siemens FI 01 · 2012
■
Technical specifications
Input
Resistance thermometer
Measured variable Temperature
Sensor type
• to IEC 60751 Pt25 … Pt1000
• to JIS C 1604; a=0.00392 K
-1
Pt25 … Pt1000
• to IEC 60751 Ni25 … Pt1000
• Special type over special characteristic (max.
30 points)
Sensor factor 0.25 ... 10 (adaptation of the
basic type, e.g. Pt100 to version
Pt25 ... 1000)
Units °C or °F
Connection
• Standard connection 1 resistance thermometer (RTD)
in 2-wire, 3-wire or 4-wire system
• Generation of average value 2 identical resistance thermome-
ters in 2-wire system for genera-
tion of average temperature
• Generation of difference 2 identical resistance thermome-
ters (RTD) in 2-wire system (RTD
1 – RTD 2 or RTD 2 – RTD 1)
Interface
• Two-wire system Parameterizable line resistance
≤ 100 Ω (loop resistance)
• Three-wire system No balancing required
• Four-wire system No balancing required
Sensor current ≤ 0.45 mA
Response time T
63
≤ 250 ms for 1 sensor with open-
circuit monitoring
Open-circuit monitoring Always active (cannot be
isabled)
Short-circuit monitoring can be switched on/off (default
value: ON)
Measuring range parameterizable (see table
"Digital measuring errors")
Min. measured span 10 °C (18 °F)
Characteristic curve Temperature-linear or special
characteristic
Resistance-based sensors
Measured variable Actual resistance
Sensor type Resistance-based, potentiome-
ters
Units Ω
Connection
• Normal connection 1 resistance-based sensor (R) in
2-wire, 3-wire or 4-wire system
• Generation of average value 2 resistance-based sensors in
2-wire system for generation of
average value
• Generation of difference 2 resistance thermometers in
2-wire system
(R1–R2 or R2–R1)
Interface
• Two-wire system Parameterizable line resistance
≤ 100 Ω (loop resistance)
• Three-wire system No balancing required
• Four-wire system No balancing required
Sensor current ≤ 0.45 mA
Response time T
63
≤ 250 ms for 1 sensor with open-
circuit monitoring
Open-circuit monitoring Always active (cannot be dis-
abled)
Short-circuit monitoring can be switched on/off (default
value: OFF)
Measuring range parameterizable max. 0 ... 2200 Ω
(see table "Digital measuring
errors")
Min. measured span 5 ... 25 Ω (see table "Digital mea-
suring errors")
Characteristic curve Resistance-linear or special char-
acteristic
Thermocouples
Measured variable Temperature
Sensor type (thermocouples)
•Type B Pt30Rh-Pt6Rh to DIN IEC 584
•Type C W5 %-Re acc. to ASTM 988
•Type D W3 %-Re acc. to ASTM 988
•Type E NiCr-CuNi to DIN IEC 584
•Type J Fe-CuNi to DIN IEC 584
•Type K NiCr-Ni to DIN IEC 584
•Type L Fe-CuNi to DIN 43710
•Type N NiCrSi-NiSi to DIN IEC 584
•Type R Pt13Rh-Pt to DIN IEC 584
•Type S Pt10Rh-Pt to DIN IEC 584
•Type T Cu-CuNi to DIN IEC 584
•Type U Cu-CuNi to DIN 43710
Units °C or °F
Connection
• Standard connection 1 thermocouple (TC)
• Generation of average value 2 thermocouples (TC)
• Generation of difference 2 thermocouples (TC) (TC1 – TC2
or TC2 – TC1)
Response time T
63
≤ 250 ms for 1 sensor with open-
circuit monitoring
Open-circuit monitoring Can be switched off
Cold junction compensation
•Internal With integrated Pt100 resistance
thermometer
• External With external Pt100 IEC 60571
(2-wire or 3-wire connection)
• External fixed Cold junction temperature can
be set as fixed value
Measuring range parameterizable (see table
"Digital measuring errors")
Min. measured span Min. 40 ... 100 °C (72 ... 180 °F)
(see table "Digital measuring
errors")
Characteristic curve Temperature-linear or special
characteristic
mV sensor
Measured variable DC voltage
Sensor type DC voltage source (DC voltage
source possible over an exter-
nally connected resistor)
Units mV
Response time T
63
≤ 250 ms for 1 sensor with open-
circuit monitoring
Open-circuit monitoring Can be switched off
© Siemens AG 2011
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