Siemens Shaanxi 4-20mA Thermocouple RTD Head Temperature
Transmitter With ODM Support
Model 444-3H Smart Temperature Transmitter accepts 2-, 3- and
4-wire RTD, thermocouple and other resistance and millivolt inputs,
with HART protocol communication or FOUNDATION fieldbus
communication capabilities. When communicating using the HART
protocol, the output is 4-20 mA/HART linear to the input; when
communicating using the FOUNDATION fieldbus, it is an all-digital
output. Features: ·Use HART or FOUNDATION fieldbus communication ·Transmitter and
sensor matching function, after inputting the temperature impedance
curve of the specified RTD sensor into the transmitter, the
transmitter and the sensor can be perfectly matched, avoiding the
interchangeability error of the sensor, and improving the accuracy
by 75% Accuracy: 0.03% of range + 0.15°C (Pt100 as an example)
Stability: When inputting thermal resistance and thermocouple,
within 24 months, ±0.15% of reading or 0.15℃, whichever is greater
Wide range: -200~1768℃, (within the sensor range, the range setting
is unlimited) Advanced self-diagnostic features reduce the number
of on-site repairs ·Temperature correction circuit to reduce the
influence of ambient temperature Input/output galvanic isolation
·Excellent electromagnetic compatibility ·Independent parallel
alarm circuit design Arbitrary configuration of input options Functional indicators: Input: User selectable. For input options, see the "Input
Options/Precision" table on page 5. Output: When using HART
protocol communication, two-wire 4~20mA/HART output, linear with
temperature or other input signals. When using FOUNDATION fieldbus
communication, it is all digital output, conforming to ITK4.5.
Isolation: Input and output are isolated to 500 Vac reluctance (707
Vdc reluctance) at 50/60 Hz. Humidity Limits: 0-99% relative
humidity, non-condensing. Update time: ≤0.5 seconds Performance: Power supply effect: less than ±0.005% of range per volt.
Stability: With RTD and thermocouple input, transmitter stability
will be ±0.15% of reading or ±0.15°C (whichever is greater) within
24 months. Self-calibration: The transmitter analog-to-digital
conversion measurement circuitry automatically self-calibrates for
each updated temperature data by comparing dynamic measurements to
an extremely stable and accurate internal reference. Vibration Effects: The following specifications can be achieved
with no impact on performance:
Frequency | Vibration |
10～60Hz | 0.21mm displacement |
60～500Hz | 3g peak acceleration |
