Differential Pressure Transmitter MEokon 4-20mA+Hart

Short Description:

Technical parameters:
1. Basic error: ± 0.075%, 0.25%, 0.5%.
2. End-base consistency error: ± 0.25%.
3. Repeatability error: 0.25%.
4. Return error: 0.25%.
5. Stability: within the range of measurement, the basic error is not exceeded within one year.
6 temperature influence: for DP, GP class, range code 4 ~ 8, error < ± 0.15% /10ºC, the maximum range limit; For other types and other ranges, the error is doubled.
7. Constant current performance: variation < 0.075%.
8. Insulation performance: Power supply resistance to earth >400M ω.
9. Response time: when power-on starts, the response time is less than 2 seconds.
10. Sensitivity: lower limit and range variation < 0.01%.
11. Supply voltage change: lower limit and range change < 0.02%.
12 steady state change: short interruption of power supply, change < 0.02%.
13. Over the limit: lower limit and range variation < 0.05%.
14. Static pressure error: DP class, for 14MPa, the change of the lower limit value is < ± 0.3%; HP class, for 32MPa, the change of the lower limit value is < ± 0.5%.
15. Influence of external magnetic field: in 400A/m(root mean square) magnetic field, the variation is less than 0.05%.
16. Mechanical vibration: vibration frequency: 50Hz, full amplitude: 0.2mm, vibration lasted for 2 hours, residual lower limit and range variation < 0.075%.
17. Installation position influence: when the sensor center measurement diaphragm is not vertical, may produce no more than 0.24kPa zero system error, but this error can be eliminated by adjusting the zero pressure fine tuning, has no impact on the range.
18. Structural materials: pressure chamber, joint, relief valve, isolation diaphragm and other parts contacting with the medium, please refer to the selection sample for details.
19. Pressure guide connection: the connection hole on the pressure chamber is 1/4-18NPT, and the connection hole on the pressure guide joint is 1/2-14NPT. The center distance can be changed by adjusting the connection head.
20. Electrical connection: the transmitter housing has two M20 x 1.5 or 1/2-14NPT screw holes for connecting cable conduits. The housing has a terminal and a test gasket. If connected with a communicator, it can be fixed on the test gasket.
21 volume absorption: < 0.16C square meters.
22. Weight: 3351 about 4kg; EBJA is about 3.5kg (excluding accessories).
23. Flameproof: flameproof Exd II BT 4; Intrinsically safe Exia II CT6.

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Functional parameters:
1. Scope of use: liquid, gas and steam.
2. Signal output: two wire system 4 ~ 20mA isolated DC signal superimposed HART digital signal output, linear or square root output can be selected, the maximum output current is not more than 22mA.
3. Power supply: DC 12 ~ 45V; HART communication, power supply voltage range: 15.5 ~ 45V DC; General operating voltage: 24V DC.
4. Load range: HART communication, the resistance in the power circuit is more than 250 Europe, the power supply voltage is more than 15.5 volts.
5. Communication distance: the diameter of the connecting wire is greater than 0.6mm, and the communication distance is about 1500m.
6. Display device: smart LCD liquid crystal backlight 5-digit display; Use a combination of
LCD The M, Z, and S keys on the liquid crystal display, the display can be cyclic or fixed display: KPa, mA, %, mmH2O, MPa, Pa, bar, ATM, PSI, Torr and other engineering units, can be implemented without pressure to modify the measurement range (passive migration), set the fixed current output, modify the damping time, set linear, square output and backup and restore data and other functions.
7. Zero and range migration: the lower limit of the measuring range shall not be lower than the lower limit of the maximum measuring range, and the upper limit shall not exceed the upper limit of the maximum measuring range, that is, the working range shall not exceed the limit of the sensor. The zero and range can be set at any corresponding point from 4 to 20mA.
8 zero pressure fine tuning: use M+Z button to clear the zero, correct the transmitter installation position change or zero drift caused by the error, the transmitter pressure adjusted to zero pressure value.
9 resistance value: electronic damping adjustable range of 0 ~ 32 seconds.
10. Fault alarm: When the fault is detected by the self-diagnosis program, the analog output is higher than 20.8mA or lower than 3.9mA.
11. Data recovery: when the data is damaged, the damaged data can be recovered by three keys.
12. Temperature compensation: the computer collects temperature data and sends it to the transmitter for temperature compensation.
13. Temperature indicator: indicates the ambient temperature value of the transmitter.
14. Operating temperature: electronic circuit: -40 ~ +85ºC, with LCD LCD: -30 ~ +80ºC; Sensitive element (filled with silicone oil) : -40 ~ +104ºC;
15 storage temperature: -45 ~ +90ºC.
16. Safety protection: AND circuit protection design, anti-static impact, surge current, overload protection function is powerful.