Help with blocking RF signal

[oaklandopen]

First off, im sorry if this is in the wrong section, or site in general. I am looking for a simple fix so i turned to whatever online forum seemed the most appropriate

I work in maintenance at a facility that utilizes patient monitoring. we have a patient that is housed directly above one of our doorways utilizing a wander-management system. this includes receivers at the doors below, and a transmitter on the patient.

the alarms have been going off at night where the doors are, non-stop. after some testing we determined that it's most likely due to the patient being above the receivers, and while office fluorescent lights are off (located next to the doors).

aside from moving the patient and/or adjusting the receiver strength, i was looking into trying to block the signal between the receivers and where the patient sleeps. it's a drop ceiling and concrete between floors. i found some materials on amazon i am willing to try, but before i did that i wanted to ask about any specific material i should look for and how to set it up

the system is running at 262kHz, and after testing in the patient's room it's a very narrow field near the floor that gets picked up and alarms downstairs. i would say no more area than a hula hoop

thanks for your help

 

[kb4mdz]

Disclaimer: IANAL, I do not play one on TV or in any court of law, but this is my firm opinion on this trouble:

This sounds like a very serious problem that should (IMO) involve the manufacturer of the receivers and transmitters. This is not something that should be handled in-house with your average set of troubleshooting skills. And that's not to say you and your facility aren't intelligent, but there are several avenues that are probably unfamiliar to you. Among other words, liability, expertise with the equipment and its functions and limitations are ones that come to mind.

 

[prcguy]

VLF frequencies would be difficult to block and no carbon doped RF absorber like "EchoSorb" will work. Even sheet metal shielding would need special attention and thorough testing to see if it works. I would also suggest you work with the transmitter/receiver mfr to fix the problem.