Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: Looking at manometer which port is + and which is -?
Document: I bought this unit after looking locally for a manometer and only finding the glass tube type (ie simplistic) for more than I got this unit for. Having the multiple units of measurement is nice, zeros easily.
Purchased Manometer to monitor crank case pressure on marine diesel engines. Have not actually used unit but seems intuitive and easy to operate.
I'm happy to say that so far this manometer is functioning very well for me. I've had a couple before this one over the years and so far it appears to be handling gas line measurements accurately. It's a no brainer to use, it's bright screen helps for working in dark or dim lit spaces, and it's priced accurately. I've no complaints, only a good working piece of equipment.
Here I am, about to return a 5 star product... This manometer is great, but the product description says 10 PSI max in two places. That is incorrect - this unit reads to 2 PSI max, then it goes to an error code. I purchased this for servicing a 4 PSI tank, so 2 PSI does not do it. Amazon needs to modify their description, while I figure out if I should keep a great meter I don't need.
Maybe not onto carpet. The cheap protective sleeve that comes with it might help a little bit, but not enough.To store and carry my Pyle manometer, I bought a small (10 x 6 x 2.5 inch) hard sided plastic pistol case (search under Pistol Case) for under $10. I cut partially thru some of the foam to make a "pocket" for the meter. The case has room for the included plastic tubes and fitting, an extra battery and the instructions.
I use this to check and adjust furnace gas valves. Worked well initially and on the second day the display broke. Amazon promptly sent me a free exchange. No issues so far with the replacement meter. It comes with 4 hoses and 1 barb fitting that will screw into port on gas valve. My only issue is that since it is a dual meter I think it should have come with 2 barb fittings vice 1. Of course, the fittings can easily be found at most hardware stores.
this unit is a good one and the price was great.
Worth the money. Does a great job. Maybe I should not rave about it too much the price might go up..lol Did everything I needed it to do so far.
Works great i used for tuning boilers to hot water heaters!! Works greatWorks greatWorks greatWorks greatWorks greatWorks greatWorks greatWorks great
Worked fine. Done the job I bought it for. Could have got it off ebay and saved some money but thought this would be a better meter. Same as ebay-- China stuff!. But hey it worked, I bought it and it's done. We'll see how it holds up.
Answer: yes