Product Info

iTEMP TMT142
Endress+Hauser 7
Surge current resistance
• Lightning surge current D1 (10/350 µs)
• Nominal discharge current C1/C2 (8/20 µs)
• I
imp
= 1 kA (per wire)
• I
n
= 5 kA (per wire)
I
n
= 10 kA (total)
Series resistance per wire 1.8 Ω, tolerance ±5 %
4
+
-
1
2
3
+
-
3
4
S1
S2
-
+
!
+
1
-
Bus connection and
supply voltage
A0041390-EN
 4 Electrical connection of surge arrester
1 Sensor connection
The device must be connected to the potential equalization via the external ground clamp. The
connection between the housing and the local ground must have a minimum cross-section of
4 mm
2
(13 AWG) . All ground connections must be secured tightly.
Performance characteristics
Response time
Resistance thermometer (RTD) and resistance
transmitter (Ω measurement)
≤1 s
Thermocouples (TC) and voltage transmitters (mV) ≤ 1 s
Reference temperature ≤ 1 s
When recording step responses, it must be taken into account that the times of the internal
reference measuring point are added to the specified times where applicable.
Reference operating
conditions
• Calibration temperature: +25 °C ±3 K (77 °F ±5.4 °F)
• Supply voltage: 24 V DC
• 4-wire circuit for resistance adjustment
Maximum measured error
In accordance with DIN EN 60770 and the reference conditions specified above. The measured error
data correspond to ±2 s (Gaussian distribution). The data include non-linearities and repeatability.
ME = Measured error
MV = Measured value
LRV = Lower range value of relevant sensor
Typical
Standard Designation Measuring range Typical measured error (±)
Resistance thermometer (RTD) as per standard Digital value
1)
Value at current
output
IEC 60751:2008 Pt100 (1)
0 to +200 °C (32 to +392 °F)
0.11 °C (0.2 °F) 0.13 °C (0.23 °F)
IEC 60751:2008 Pt1000 (4) 0.14 °C (0.25 °F) 0.15 °C (0.27 °F)