Seeking help regarding the output jump issue of pressure transmitters!
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Recently, I encountered a rather troublesome issue: the output fluctuations of the pressure transmitter supplied to the customer could not be resolved. The details are as follows: The pressure transmitter has a range of 20 MPa, is powered by 24 VDC, and provides an output of 0–5 VDC (three-wire system); its accuracy is 0.25%. The proportional valve is also powered by 24 VDC, with an actuation voltage range of 0–10 VDC. During installation on-site, the customer used the same 24 VDC power supply for both the pressure transmitter and the proportional valve, and that’s when the problem arose. After the proportional valve is opened, the output of the pressure transmitter at zero pressure increases by 2 mv and remains at this level; when the proportional valve is closed (that is, when a voltage of 0 VDC is applied to it), the transmitter’s output returns to normal. Testing revealed that the ground connected to the spool valve’s opening signal and the power ground were shared. If the two devices can operate properly with 24VDC power supply each, there should be no problem, but the customer still refuses and claims it’s a problem with my pressure transmitter, demanding a return. . . I’m reaching out to everyone here for help; I hope they can assist me in analyzing what the problem actually is Thank you!
Regarding pressure transmitters, domestic products are highly susceptible to changes in supply voltage. When the proportional valve operates, it causes a drop in the supply voltage, which in turn leads to variations in the output of the pressure transmitter
The issue is that the pressure transmitter operates on a voltage range of 15–32 VDC; the voltage drop caused by the operation of the proportional valve should not affect the output, right?
Wide voltage refers to the range of supply voltages; once the supply voltage is set, the zero point is adjusted after installation, and thereafter the supply voltage must not change anymore.
Thank you, expert, for the analysis! Ah, the problem is that customers are being so picky these days. . . They say there’s a problem with my transmitter!
Thank you, expert, for the analysis! Ah, the problem is that customers are being so picky these days. . . They say there’s a problem with my transmitter!