12.2.3
General specifications
General specifications
SITRANS TH/TR
SITRANS TF
Supply voltage
7.5
1)
... 48
2)
V DC
7.5
1)
... 30
2)
V DC (Ex i)
Single chamber housing
Dual chamber housing
Without display:
7.5 ... 48 V DC
7.5 ... 30 V DC (Ex i)
With display:
10 ... 48 V DC
10 ... 30 V DC (Ex i)
Without display:
8.2 ... 48 V DC
8.2 ... 30 V DC (Ex i)
With display:
10.7 ... 48 V DC
10.7 ... 30 V DC (Ex i)
Maximum power loss
≤ 850 mW
Minimum load resistance at supply volt‐
age > 37 V insulation voltage, test/opera‐
tion
(Supply voltage – 37 V) / 23 mA
Insulation voltage, test/operation
2.5 kVAC / 55 V AC
2.5 kVAC / 42 V AC(Ex i)
Polarity protection
All inputs and outputs
Write protection
Jumper or software
Warming-up time
< 5 min.
Starting time
< 2.75 s
Programming
SIPROM T or HART
Signal-to-noise ratio
> 60 dB
Long-term stability, better than
± 0.05% of measuring span/year
± 0.18% of measuring span/5 years
Response time
• 4 to 20 mA
≤ 55 ms
• HART
≤ 75 ms (typically 70 ms)
Damping
0 ... 60 s
Signal dynamic, input
24 bit
Signal dynamic, output
18 bit
Influence of changes in supply voltage
< 0.005% of measuring span/V DC
1)
Note that the minimum supply voltage must correspond to the value measured at the terminals of the SITRANS TH320/TH420
and that all external voltage drops must be taken into consideration.
2)
Protect the device from overvoltage with the help of a suitable supply voltage or suitable overvoltage protection equipment.
12.2.4
Input accuracies
Basic values
Input type
Basic accuracy
Temperature coefficient
1)
Pt10
≤ ±0.8 °C
≤ ±0.020 °C/°C
Pt20
≤ ±0.4 °C
≤ ±0.010 °C/°C
Pt50
≤ ±0.16 °C
≤ ±0.004 °C/°C
Technical data
12.2 SITRANS TH320/TH420/TR320/TR420/TF320/TF420
SITRANS TH100/TH320/TH420/TR320/TR420/TF320/TF420 with 4 to 20 mA/HART
Operating Instructions, 05/2020, A5E41864807-AB
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