How to eliminate the impact of using a walkie-talkie next to a temperature transmitter on temperature measurement
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When a walkie-talkie is used near the temperature sensor, the temperature values fluctuate rapidly, and the values on the DCS side also change frequently. How does everyone avoid such situations? Are there any other good ways besides staying away from the transmitter?
1. How far is the distance for the walkie-talkie to be affected by temperature changes? 2. Provide a shielding cover for the temperature sensor assembly; the cover should be grounded, and it’s likely that the cables also need to be enclosed in shielding tubes. 3. At the wiring terminals of the temperature sensor, connect 15uF and 0.033uF tantalum capacitors, choosing capacitors with a voltage rating of over 35V. This approach could indeed be tried
There’s even that kind of thing – I’ve learned something new! Can walkie-talkie wireless FM also affect wired instruments? Ground the signal line; trying adding an isolation barrier might work
Add an isolation module before the signal is connected to the DCS to see...
Interference from walkie-talkies is difficult to eliminate, which is why many companies prohibit bringing them into the cabinet rooms. The impact on the work site is quite significant; walkie-talkies are used during debugging. Perhaps the power level is too high, or trying a different channel might help.
Wrap the surface of the transmitter with aluminum foil
That doesn’t make sense. The casing of your transmitter is made of cast aluminum, right? A metal casing provides shielding; if it’s interfered with by electromagnetic waves, then it’s probably because the grounding of the device and its shielding system aren’t properly done