Q: How does the output of radar / guidedral belt and how to achieve Double 4-20mA? What variables can be implemented?
a) Selection of the output of the switch
In addition to a conventional 4-20mA output, there is an attached amount.
Settings to generate a working condition for alarm output, easy to monitor measurements.
Switch signal output can be set according to the following parameters:
• Location
• distance
• Terminal voltage
• Electronic module temperature
• Relative echo
Note that the switching signal output is the collector path unpacking therefore need to be external.
b) Selection of Dual Road 4-20mA Output
In addition to the four conventional 4-20mA output, the 2nd road 4-20mA output is added.
Settings Similar to the above A).
Q: What is the requirements when the capacitors and guidelines measurement interfaces, what is the advantages and disadvantages of the two?
Prerequisite for capacitor applications:
Two media must be a conductive medium and another non-conductive medium or two media are non-conductive media and their conductivity difference is large;
Advantages of Parada Leaders: Safety measurements are not affected by the height of suspension;
Disadvantages: The total level height cannot be output;
Medium components must be stable.
Prerequisite of the application of the wireless radar:
The dielectric constant of the upper medium must be a known constant value (the upper layer thickness is known to automatically calculate the dielectric constant by Fieldcare); the dielectric dielectric constant is not greater than 10; the dielectric constant difference between the upper dielectric and the lower dielectric It must be greater than 10; the thickness of the upper medium is at least 80 mm; there is no emulsifying layer.
The total level and interface signal can be output simultaneously compared to the capacitance level meter.
Disadvantages: Do not adapt to an emulsified layer
FMP55 Application Prerequisites: Tommation, but not affected by emulsifying layer
Advantages: Combined with the advantages of capacitance and guidedral radar.
Question: How does the tirate density implementation?
The sensor works based on the principle of component vibration, and the component portion is immersed in the tuning fork portion in the subjected to the liquid. The tuning fork portion is induced by inductive vibration through the inherent pressure appliance fixed to the bottom of the fork. The volatile frequency is detected by the secondary piezoelectric apparatus fixed to the other end of the fork and then enlarges the signal through the top circuit.
The liquid density is closely related to the vibration frequency when the liquid flows is subjected to the liquid, and when the density of the liquid is measured, the vibration frequency at the time of liquid flow also changes. By the following equation, the density of the subjected to the liquid can be accurately calculated.
D = K0 + K1T + K2T2
D = unclear measured medium density (kg / m3)
T = vibration frequency (μs). K0, K1, K2 = constant, reading full text, original title: E + H instrument FAQ and Q & A
Article Source: [Micro Signal: HGYBWH, WeChat public number: lazy work control] Welcome to add attention! Please indicate the source of the article.
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