UNI-T LM320B: do not buy it for the 0.01° resolution

Рет қаралды 5,603

2 жыл бұрын

Пікірлер: 15

@TheBonbenk Жыл бұрын

Hi dude, have you burn it down? Lol. If not, maybe you can calibrate it to stop value changing while sitting dead still on a flat surface. I have a similar cheap digital level like yours (minus the laser feature), and have exactly the same problem. I look through the internet and found out that it can be calibrated. I use my precise 100x70mm machinist square as a base, and a glass as a table base to ensure its dead flat when I did this. Here's the procedure : 1. When the level is off, press "on/off" button and "zero" button at a same time. The display would show CAL1. 2. Hold it firmly, press "zero" button, the display would show CAL2. 3. Rotate the level by 90d clockwise, press "zero" button, the display would show CAL3. 4. Rotate it again 90d clockwise, the level is now upside down. Press "zero" button, the display would show CAL4. It's tricky to press the button, try use some pick tools to press it if you don't have a square as a base. 5. Rotate it again 90d clockwise, press "zero" button, the display would show CAL5. 6. Rotate it again 90d clockwise to its original position, press "zero" button, the display would show PASS. 7. Done After doing that the drifting value is no more, and the repeatability is improved. Well looking at its price, maybe it doesn't meant for precise machining tools. But for woodworking, carpentry, or everyday DIY, it works fairly well. I hope it helps. Here's mine if you're interested to see : ibb.co/cN83cqJ

@precisiongarbage Жыл бұрын

i have actually destructively disassembled it lol, mostly to see how it's made and what accelerometer they used. i did try to calibrate it before the disassembly using the internal calibration procedure but it was not as thorough as you describe; it's the typical rotate 180 degrees calibration routine. i even performed the calibration with a surface plate to no avail. the angle meter you have shown probably has a different accelerometer; most accelerometers drift to various extents over time and temperature. i have since created my own angle meter using Analog's ADXL355 accelerometer and it holds 0.01 degrees for days on end. the ADXL355 is more expensive than the entire uni-t meter though lol so i guess you just can't expect something to be that accurate for that price

@PokkutoolsMalaysia 2 жыл бұрын

Thank you for your video..it's help me before making purchase 🙏

@take1one Жыл бұрын

OK I'll buy the one with the tape on it. What's the name of that one? I'm not using it for machining so accuracy is not that important but I'd like as much as I could get. And the taped one looks to have held up for a bit in a shop so its at least its got that going for itself.

@precisiongarbage Жыл бұрын

if you search for "Dasqua Digital Angle Gauge with Flip Out Display" you will find it. i've had it for a long time. the tape is there to apply pressure to the display because otherwise some segments would not light up lol. it might not be available for purchase anymore

@precisiongarbage 2 жыл бұрын

tl;dw the displayed angle drifts by 0.15 degrees over the course of a few minutes. the LM320B is outperformed by a 0.1 degree resolution angle meter. save your money, buy something else

@ntrdoentuc 2 жыл бұрын

Can you make a recommendation for a device like this? in the low-medium budget range please

@precisiongarbage 2 жыл бұрын

@@ntrdoentuc my frame of reference is limited to the two devices in the video, so i'm afraid i can't recommend anything specific. i'm currently making my own

@brianpayne3468 2 жыл бұрын

Have you ever thought that your battery is low -- that is maybe the root cause of the problem.

@sml2238 2 жыл бұрын

I wonder if that is the case. I just ordered this one thinking the same thing as the buyer and also seeing it somewhere else I was hoping it was a decent budget option but now not so sure. I guess ill find out since I already ordered it.

@precisiongarbage 2 жыл бұрын

it is unfortunately not the root cause of the problem; it was full when i started experimenting with it and i've charged it since. the result is the same

@precisiongarbage 2 жыл бұрын

@@sml2238 let us know your findings

@sml2238 2 жыл бұрын

@@precisiongarbage oh gotcha thanks for your comment. I will definitely let you know once I test it out. I also have the iGaging gen 3 angle cube and the Klein angle cube. Both of those are pretty good, the Klein is probably the best even though the specs don't appear to be as good it seems to be more consistent. But the form factor of the Klein isn't as convenient for my use case.

@kwinzman Ай бұрын

You know that resolution is not the same accuracy, right? Never has been. What accuracy is advertised for the UNI-T?

@precisiongarbage Ай бұрын

i'm not stupid, so of course i know that. the point of the video is to show that the extra decimal place contains no useful information and may as well not have been displayed. at 2:54 in the video i mention that 0.16 degrees is close to the stated accuracy specification, which is ± 0.2 ° as listed on the product page. _technically_ the maximum permissible deviation (indicated) is 0.24 °; the specification is presented with a single significant figure after all