Siemens SITRANS T4200, Operating Instructions Manual

Page: 72 / 100

SITRANS TH200/TH300
Operating Instructions, 06/2010, A5E00393069-03
71
Technical data
11
11.1 Technical data
Input point
Resistance thermometer input point
Measured variable Temperature
Sensor type

According to IEC 60751
Pt25 ... Pt1000

According to JIS C 1604; a=0.00392
K
-1
Pt25 ... Pt1000

According to IEC 60751
Ni25 ... Ni1000

Special type
Via special characteristic curve (max. 30 points)
Sensor factor 0.25 ... 10 (adaptation of the basic type, e.g. Pt100, to
version Pt25 ... Pt1000)
Units of measurement °C or °F
Interface
 Standard connection
1 resistance thermometer (RTD) in two-wire, three-wire
or four-wire input
 Averaging 2 equal resistance thermometers in two-wire input for
averaging the temperature
 Differentiation 2 equal resistance thermometers (RTD) in two-wire input
(RTD 1 - RTD 2 or RTD 2 - RTD 1)
Connection

Two-wire input
Line resistance can be assigned in the parameters
≤100 Ω (loop resistance)

Three-wire input
No trim necessary
1)
 Four-wire input
No trim necessary
Sensor current ≤ 0.45 mA
Measuring cycle ≤ 250 ms for 1 sensor with break monitoring
Break monitoring Always active (cannot be switched off)
Short circuit monitoring Can be switched on/off (default value = ON)
Measuring range Can be set in the parameters (see table in chapter Digital
measuring error (Page 78))
Min. measuring span 10 °C (18 °F)
Characteristic curve Linear to temperature or special characteristic curve
1)
Prerequisites: same resistance for all three lines.