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STP01 온도프로파일 | |
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Measurand | Temperature at 5 depths from 0 to 0.5 m |
Temperature sensors |
|
Uncertainty of temperature difference measurement |
1.5 % of measured value plus
measurement system uncertainty in x 10-6 V/40 |
Uncertainty of relative position | ± 0.001 m |
Rated opertating environment | Surrounded by soil |
On-line functionality testing |
|
Reference temperature sensor | Pt100, IEC 751:1983 class B |
Sensor foil thickness |
|
Measurement depths |
0.02, 0.05, 0.1, 0.2 and 0.5 m |
Measuerment range | -30 to +70 °C |
Standard cable length (2 cables) | 5 m, longer cable (option) |
IP protection class |
|
Optional non-traceable measurand | Thermal conductivity at 3 depths |
Heater | |
Heater resistance (nominal) | 200 Ω |
Heater rated power supply |
|
Power consumption daily average |
0.005 W |
Interval between self-tests | 24 hr |
Self-test duration | 600 s |