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Basic Multimeter Functions & Accessory Cables for eBike Owners

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  • AZguy
    replied
    Picked up a used one of these (very good deal IMO) for the shop a few months ago:

    Click image for larger version

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  • treolan
    replied
    I bought a Bikemaster multimeter at 4WO| ATV Parts last month because it was on sale. I use this multimeter for testing and diagnosing electrical problems on my bike and atv machine. I can say that It is accurate enough for my purposes.

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  • AZguy
    replied
    My greatest grief with the inexpensive meters is their accuracy is often specified around 1%. I've measured several and some meet their specifications and some don't. Regardless, if you are trying to calibrate a charger or measure battery SOC 1% is too big an error for me. Even if it's 1% of the measured value (not the full range - some mean it this way), 1% at 50V is 0.5V (1% of a 200V full scale is 2V!!!!).

    Having said that I have an even smaller old meter that has a hinged cover that sets in my toolbag for troubleshooting. Even an inaccurate meter is good for basic stuff!

    I take my meters and compare them to uber accurate bench meters. I haven't bothered opening them up and calibrating but then I know which ones are more trustable and how far off they are at the typical voltages. Some get pretty close but the best cheap one I have is still about 0.2V off at ~50V...

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  • max_volt
    commented on 's reply
    Did you check the internal fuses? oh wait, you need another meter to do that.

  • dakori
    replied
    I was looking for a cheap multimeter and thus I bought Klein MM400 multimeter. After 3 weeks, it's stopped working. Cheap product means luck! Although, I ask their support about this problem. Waiting for their response.
    I bought it after reading this review https://bestmultimeterreviews.org/klein-mm400-review/. Because,at that time I was looking for cheap option like this.
    Last edited by dakori; 05-14-2018, 06:40 PM.

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  • Eric Luna
    replied
    we added to the luna cycle website the multi meter we figured to be the ultimate volt meter

    Although it does not seem like much on first site it has auto ranging which makes it really simple to use and it is tiny and well made.

    Perfect for taking along with you in a small tool bag.

    we actually put a lot of thought into sourcing this meter....

    and weighted through all the clones of this particular product and got in with the factory direct.

    The Slim Pocket Digital Multimeter is an extremely slim and highly portable multi-meter that you can take wherever you go on your ebike.

    Click image for larger version

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  • Louis
    replied
    Don't forget about that auto off feature. I found 9V batteries got expensive.

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  • Bicycle365
    replied
    spinningmagnets Thanks for that one. I have a analog meter that I have been using. Im going to get one of these Sparkfuns as my backup..
    Great site in general too...

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  • Louis
    replied
    Spot on. My list of two has grown. I hate being shut down and somethings, like it or not are consumables. I went two years without needing my back up display, but when I did, I was done in 20 minutes. Not shut down for a week. Or shipping poor for an overnight or two day delivery. We should maybe have a recommended "Two, One for the Pats Box" list... I agree a Multimeter is one. Also nice to keep things honest.
    Although common wisdom, two throttles has yet to pay off. Speed sensors, sensor magnet, brake lever, battery, and thrust bearing has.

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  • spinningmagnets
    replied
    There is no doubt in my mind that the Klein MM400 in the first post is worth every penny of the $40 price. However, if you can't quite swing $40 for that right now, consider the $15 sparkfun as a starter unit.

    If any tool is important for what you do, you should have two of them. A "good" one, and a cheaper one that you take when you're going where it might be broken or stolen...

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  • Louis
    replied
    I'm a huge eBay, Aliexpress, and Amazon fan. The core principle in building from kits is finding creative solutions. That's where forums are so incredibly helpful. Sharing creative solutions.
    I use my knife sharpening stone to make points on my probes.

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  • Bicycle365
    replied
    I bought a $3 gun from the craft store. It's used to make those puffy ink cat sweatshirts you see on the old ladies at the mall...

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  • Bicycle365
    replied
    commuter ebikes Yes and they can store clipped to the back of the meter. They are sharp enough to draw blood if you're not careful, trust me on that one:eek:

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  • commuter ebikes
    replied
    Does the multimeter in the OP have the "stock sharp needle probes"? I need those.

    Thanks for the recommendation. I am just about to buy a multimeter.

    I am also looking for recommendations for a nice soldering station and heat gun (for heat shrink tubing).

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  • Louis
    replied
    I'm finding that having a multimeter with alligator clip probes is also very useful. The suggestion to buy an auto off version would have paid for a better multimeter in my case. My first, still working meter went through enough 9V to inspire me to buy a new auto off. I use it now to occasionally confirm the meters are within range. My frequent use version os the auto off and I'd be buying a 9V a week without it. So I'm old and forgetful...

    I forget to mention the continuity function is great for testing brake sensors. Another case where the alligator clips are useful when there's no third hand available.
    Last edited by Louis; 06-28-2016, 01:26 AM.

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