To leverage the fast-ramping capability of resources to provide great value to the grid, electricity system operators such as the Midcontinent Independent System Operator (MISO) continue to evolve their approaches for integrating energy storage resources, including pumped-storage hydro (PSH), into the electricity markets. High accuracy fuel gas metering requires knowledge and diligent efforts but the rewards and benefits are significant. Accurate incremental heat rate curves, which cannot be developed from poor or inconsistent flow measurement data, can provide for reliable economic dispatching.
The rewards of accurate flow measuring are first the cost savings that come from avoiding poor metering and secondly the advantages of accurate data for accounting, performance determinations, and future cost projections.
This summary of information about flow metering technologies will aid power plant engineers in making correct choices to avoid poor flow measurement. The effects of dynamic flow and pulsating flow more » conditions which generally cause meters to over register will be reviewed. Factors that affect turbine meter performance and long term accuracy will be explained so that plant engineers can check turbine meter accuracy. The errors created by distorted velocity profiles and even certain types of flow conditioners upstream of orifice meters will be explained in detail so that plant engineers can avoid these installations. The lack of well developed velocity profiles can cause significant errors for orifice and other flow meters. This paper will review and provide information about many of the error mechanisms that affect the common types of fuel gas meters.
Waveform cutted on the negative Slope, IDrive 0xD000Īmplitude on the Limit, see spike on the 5th cycle, IDrive 0A000Īmplitute in range except of the first cycle, IDrive 0x3000Ģ.= , If i set IDrive according to the Manuel, i need to apply the Value 0xD000 to achive 1.2V (minimum recommended value) on the Antenna Output. In the Datasheet on page 16, the plots shows continuous oscillation, without interrputs and cuts, also with a normal negative slope. Is this a internal diode in the sensor device, and do I have to care about this cut of the Waveform? I read something in the Datasheet, that the internal clamping diodes will limit the Voltage to 1.8V, what about the negative slope? In snou139.pdf, there are some plots, which also shows only the positive slope, but with a clean end at 0V, not starting the negative slope and cutting it on -0.7V. Then I saw, that when IDrive is set to 0x3000 to 0xA000, the conversion takes 1.5 periods, but with higher values the waveform is cutted always at -0.7V. First, i thought, this is because the FDC2214 has finished the conversion at this time, and cuts the rest of the cycle. If i configure IDrive higher than 0xA000, the negative slope will be cutted at -0.7V.
I tried different constellations, always in the single ended configuration.ġ.) with the EVM, i get the Waveform like in the attachement, Measured from Sensor CH0 Antenna Pin (IN0A) to GND. I use the Sensor EVAL Board FDC2214EVM, trying to fitt the sensor to our application. I have some questions regarding the normal behavior of the FDC2x1x sensor Family. Other Parts Discussed in Thread: FDC2214EVM, FDC2214
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