What is considered negative and positive?? A line in the heart window?
1274441
I have not gotten a positive with these since I havent gotten pregnant yet, but they are like ept, first response, walgreens brand etc. it has a test line that will show up no matter what and if pregnant there should be a second line. hope this helps!
1943681
If the top line only appears, it is positive. If both lines appear, it is negative.
2120022
Not necessarily. If the test line is not as dark or darker than the control line then it is neg. Not bother trying to analyze negative tests.
1298874
Not 100% sure. There might be some traces present if line is faint. When I tested it the lines were very strong lines.
1797264
It sounds like the positive and negative are reversed. I use it on my dog and she definately reacts to the negative. I have learned that you can't be too far from your dog/dogs or the alarm will not have any effect on them. Hope this helps you.
1567056
negative or positive voltage is simply a reference to ground. reverse your power connections (leads) and you now have negative voltage. it does not have a dual output for both positive and negative voltagesgood luck
1190236
vertical line will show positive. watch out for the dye runs it takes a while for them to settle
1947877
There is NO "positive" and "negative" in house wiring. Please do a web search on "lamp re-wiring". An improperly wired lamp can give you a bad shock (or worse) even with the switch off.
2023052
Hard to tell. It makes a metallic sound when hitting something against it, but the opening is pretty small is it's hard to know for sure. Definitely not plastic lines though.
1072526
When you cut the strip you get a positive and a negative tab for each side...so if you have a strip pre-cut, you have a positive and a negative tab on one end and another positive and negative on the other end.
1975773
One on positive. Usually negatives are attached to metal on car body...as long as car body is "one piece" or ground wires -thick like the one from battery to engine block-are connected from engine to cab (passenger section). Also, anytime you attach a negative (black wire) to the body, make sure there is bare metal where the screw holds wire into body (use wire brush or wire brush on drill to make sure there is bare metal at the connection). In other words, make sure you have a good "ground" (negative from battery to car engine AND body). Power side (red/12 volts/positive terminal) is the one you need to have an in-line fuse for. Hope this helps. One on positive. Usually negatives are attached to metal on car body...as long as car body is "one piece" or ground wires -thick like the one from battery to engine block-are connected from engine to cab (passenger section). Also, anytime you attach a negative (black wire) to the body, make sure there is bare metal where the screw holds wire into body (use wire brush or wire brush on drill to make sure there is bare metal at the connection). In other words, make sure you have a good "ground" (negative from battery to car engine AND body). Power side (red/12... » Read More One on positive. Usually negatives are attached to metal on car body...as long as car body is "one piece" or ground wires -thick like the one from battery to engine block-are connected from engine to cab (passenger section). Also, anytime you attach a negative (black wire) to the body, make sure there is bare metal where the screw holds wire into body (use wire brush or wire brush on drill to make sure there is bare metal at the connection). In other words, make sure you have a good "ground" (negative from battery to car engine AND body). Power side (red/12 volts/positive terminal) is the one you need to have an in-line fuse for. Hope this helps. « Show Less
1665030
I don't think it matters but I just tried it and got different readings from one arm to the other. It is important to have your arm at the level of your heart and not below.
1947878
It matters how the wires are made.... If the wires are of a ZipCord, then the Ridge Side is Always Negative. The Round / Smooth Side is Always Positive. If the wire is Black and hooked to AC, then the Wire is Positive and White is Negative. If the wires are Red and Black (for DC Purposes), then Red is Always Positive and Black is Always Negative.
2102475
Yes, but not sure what's your concerns since there's a red line that becomes visible and in the screen the "slashed bell" appears. I hope this helps.
1514980
According to the instructions a negative (not pregnant) response is one line in the control window. A positive (pregnant) response is two lines - one in each window.
1190238
I believe mine had the same window. If I remember correctly I had a control line that was horizontal and the instructions said a '+' symbol was the indicator for pregnancy.
1675492
I think it means that the unit is taking your heart rate as it continues to inflate. When it has gone into error for me the little heart is not flashing ...