I meant a strip of tape not a covering of tape. Tape, in a covering, will cause the concrete to dry differently.
That is my point.
When some conduct long term testing, the probes are covered with a LOT of tape to keep out water, dust and prying eyes. So we get these questions asking why the probes are hanging for months with little change and why do new probes read significantly less than the old probes in the concrete.
Hysteresis explains some of the phenomenon, but I think we need to get some advice in the installation instructions advising against covering the sensors with tape, plastic, cardboard etc. It just throws off our readings.
What is the difference between a covering and a strip?
I usually see an "X" over a probe with 2" tape.
I always place a couple of strips of lightweight bright colored tape over the sensor caps and write "DO NOT DOSTURB" on the tape. This seems to work to keep the trades respectful of the testing process (until today). My return trip after 72 hours revealed a couple of locations where someone removed the tape, wadded it up and left it next to the open sensor. Very professional behavior, eh?
There have been times when I wondered if others may have dribbled some water in the hole.... Just to mess with us.
or throw in a little dirt or half a turkey sandwich
07-12-2012, 12:50 PM
(This post was last modified: 08-02-2012, 07:55 PM by eaadams.)
I have a 2nd tester now using a puddy like caulking between the cap and sleve / concrete. Fails often but doesn't prevent surface moisture from coming out.
Is there such a thing as a duct type tape that breaths? like a mesh tape? I'd be more comfortable with that.
In reality I picture a new wagner product. It would be a cylinder (battery shaped) made to fit in the meter hole. It would fill the hole and prevent debris from entering and then I would also have a metal core running the full length so I could remove it with a [edit: magnet]. If you wanted to get fancy you could integrate a mushroom cap shape to it to protect the edges.
I believe caulk does have some water in it. As minimal as it is who would want to get grilled on it in court.
How about pure silicone? Probably sticks and seals better than caulk.