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Member's Forum Should Handheld multimeters have color LCD displays?
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Should Handheld multimeters have color LCD displays?

scottiebabe
scottiebabe over 2 years ago

As I am waiting for my OWON HDS242 to come in the mail, I thought I might ask other members how they feel about a handheld multimeter having a power hungry color LCD display.

The product webpage suggests a battery life of 3-6 hours. https://www.owon.com.hk/products_owon_hds200_series_digital_oscilloscope 

Even more interesting/exciting is the batteries can be recharged with a USB-C cable.

Based on Kerry Wong's teardown: http://www.kerrywong.com/2021/09/18/teardown-of-an-owon-hds272s-3-in-1-handheld-oscilloscope-dmm-awg-compared-with-hantek-2d72/ the multimeter functionality is galvanically isolated from the usb connector.

What do you think?

First time trying the poll feature, hopefully I didn't goof it!

Based on Kerry's notes the meter also has the bones of a real oscilloscope (ADC, FPGA, Sample memory, etc..) How performant is oscilloscope it? I don't know yet.... But I am intrigued!

Update: The scopemeter arrived!

Indoors the color LCD looks awesome! For me my multimeter ends up either sitting flat on my desk on in my lap and in both those cases the display is 10x easier to read than a segment LCD without a backlight.

Outdoors with direct sunlight the segment LCD is easier to read than the color LCD.

In the shade outdoors, I think both display technologies are equally legible.

image

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  • baldengineer
    baldengineer over 2 years ago +6
    So.... I'd say, "yes," but, I'd rather have a higher-quality monochrome than a lower-quality color. That said if I can slightly flex, a company called Kaitweets sent me one of their meters. These are…
  • Jan Cumps
    Jan Cumps over 2 years ago +4
    I voted Yes! although I don't know why I'd need it yet. In other instruments, colour has often been a gimmick in the beginning. But then real good use was found for it. I put my money on this: "in a…
  • dang74
    dang74 over 2 years ago +4
    I voted yes, but it was in context to the additional information that was provided, namely that in this case it's perfectly acceptable because the product also doubles as an oscilloscope. Should all manufacturers…
Parents
  • baldengineer
    baldengineer over 2 years ago

    So.... I'd say, "yes," but, I'd rather have a higher-quality monochrome than a lower-quality color.

    That said if I can slightly flex, a company called Kaitweets sent me one of their meters. These are a MUCH slimmer form factor than traditional DMMs. They're like a bulky smartphone. They have an (innovative | annoying) auto-mode feature where it tries to determine if you're measuring voltage or resistance.

    But, the most striking thing about them is the front display. It's all plastic with a huge multi-color LCD. It is a discrete-segment LCD with backlights. It is NOT an OLED or dox matrix LCD.

    kaitweets dmm measuring a diode forward voltage

    And to be upfront, when you have the right angle, it is much easier to read than a traditional DMM's LCD.

    However, in this next shot, you can start to see how it is kind of muted with even a slight angle.

    image

    It is still readable, for the most part. But it's that angle of visibility that starts to bug me. But not nearly as much as this next issue.

    kaitweets dmm with a huge glare

    I think to enhance the visual appeal of the front display, they used highly reflective plastic. Which comes with a couple of problems. First, it's going to scratch SOOOO easily. And second, the glare from lights is going to be unbearable in many situations. I highly doubt this would be usable outside. If you have a bench light, it's going to reflect. Etc.

    (I don't have a picture where my overhead light caused glare on the LCD -- I need to get that.)

    And I know, not everyone has overhead lighting like I do. But it really doesn't take much to pick up glare.

    image

    Some of that is polarization but some of it is also glare. Plus, it is blurry! (oh wait, that's because of me.)

    For what it is worth, these sell for $40-60 depending on the specified accuracy. From a usability perspective, they're fine. I haven't had a chance to evaluate their accuracy though.

    So. tldr, having used a DMM with one option for a color display, I would prefer:

    A) Matte Screen

    B) Higher-quality LCD > Color

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  • baldengineer
    baldengineer over 2 years ago

    So.... I'd say, "yes," but, I'd rather have a higher-quality monochrome than a lower-quality color.

    That said if I can slightly flex, a company called Kaitweets sent me one of their meters. These are a MUCH slimmer form factor than traditional DMMs. They're like a bulky smartphone. They have an (innovative | annoying) auto-mode feature where it tries to determine if you're measuring voltage or resistance.

    But, the most striking thing about them is the front display. It's all plastic with a huge multi-color LCD. It is a discrete-segment LCD with backlights. It is NOT an OLED or dox matrix LCD.

    kaitweets dmm measuring a diode forward voltage

    And to be upfront, when you have the right angle, it is much easier to read than a traditional DMM's LCD.

    However, in this next shot, you can start to see how it is kind of muted with even a slight angle.

    image

    It is still readable, for the most part. But it's that angle of visibility that starts to bug me. But not nearly as much as this next issue.

    kaitweets dmm with a huge glare

    I think to enhance the visual appeal of the front display, they used highly reflective plastic. Which comes with a couple of problems. First, it's going to scratch SOOOO easily. And second, the glare from lights is going to be unbearable in many situations. I highly doubt this would be usable outside. If you have a bench light, it's going to reflect. Etc.

    (I don't have a picture where my overhead light caused glare on the LCD -- I need to get that.)

    And I know, not everyone has overhead lighting like I do. But it really doesn't take much to pick up glare.

    image

    Some of that is polarization but some of it is also glare. Plus, it is blurry! (oh wait, that's because of me.)

    For what it is worth, these sell for $40-60 depending on the specified accuracy. From a usability perspective, they're fine. I haven't had a chance to evaluate their accuracy though.

    So. tldr, having used a DMM with one option for a color display, I would prefer:

    A) Matte Screen

    B) Higher-quality LCD > Color

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  • dang74
    dang74 over 2 years ago in reply to baldengineer

    It's got a nice looking display.  No denying that.  I don't think I would like that auto feature you mentioned where the meter tries to determine on its own whether you're measuring voltage or resistance.

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  • scottiebabe
    scottiebabe over 2 years ago in reply to baldengineer

    Flex acknowledged and appreciated! I have seen that meter show up on amazon all the time. The 3d model photos look slick and I do like the formator. Its too bad the display isn't that clear and vibrant in real life.

    O dear: "This digital multimeter is included with 6 AAA batteries" WOW.

    Most of the time I am working on a project in front of a computer and there isn't a lot of extra space, so a smaller formfactor is attractive.

    But I totally agree on display, I really would love a bright crisp display (which is typical of color LCDs) but they also are power hungery which suggests having rechargeable batteries internal to the unit.

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  • baldengineer
    baldengineer over 2 years ago in reply to scottiebabe

    I think, the space it takes up is not different than any other DMM. Its X and Y dimensions are the same as other meters. It just doesn't sit as high. How many people run out of Z-space on their work bench?

    Maybe the right compromise would be something in this form factor that uses 18650 cells?

    Slightly thicker but with a brighter display?

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  • baldengineer
    baldengineer over 2 years ago in reply to dang74

    Fortunately, you can disable it. But I still didn't like it. Despite my best efforts, I couldn't quite trick it. But I feel like it would be an issue at some point.

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