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1. High-precision pressure output with an accuracy of 0.05% FSO.
2. Digital output, directly read the pressure value, the reading resolution is less than 0.01%.
3. At the same time provide high-precision temperature digital output, the accuracy of ± 1 °C.
4. Support RS485 twisted pair network, can carry 32 LDD series transmitters. When more than 32, add RS485 repeater.
5. Low power consumption, quiescent current less than 6mA, wide DC voltage supply range: 12V~24V. Suitable for battery or solar power supply.
6. Arbitrary switching of nine commonly used pressure units MPa, KPa, PSI, Kg/cm2, mH2O, Bar, mmHg, atm, usr. The error caused by the switching between the pressure units is less than 0.01% FSO.
7. The tare weight function, at any pressure point, shifts the digital output at that time to zero without affecting the output sensitivity of the LDD product.
8. The scale factor function can set the scale factor between 0.75 and 1.25 so that the current digital output is equal to the product of the current pressure value and the scale factor. In the liquid level measurement, you can set the proportional factor equal to the reciprocal of the liquid's specific gravity so that the digital output is directly equal to the current liquid level height.
9. Embedded DSP, digital processing of the LDD, digital compensation using piecewise polynomial fitting methods, including full-temperature pressure nonlinear compensation, zero and sensitivity compensation.
10. RS485 half-duplex serial asynchronous digital communication interface, there are seven kinds of communication rates to choose from, namely (BPS): 1200,2400,4800,9600,19200,38400,57600. The working protocol of the digital communication interface is: 1 start bit, 8 data bits, 1 stop bit. The transmission distance is 1200 meters. The command returns a delay of about 10ms.
11. The address of each LDD can be changed. The address range of ASCII commands is 0~9, or A~Z, or a~z of ASCII characters.
12. ASCII command format and binary command format, two formats can be used simultaneously, user-friendly and secondary development
13. Dedicated zero and sensitivity (full scale) calibration commands facilitate the calibration of LDD series products.
14. The pressure reading refresh cycle is 100 milliseconds (sampling frequency 10 times/second). The initial power-on period is 2 seconds.
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