Measure resistance, current, or voltage… for its price, this little meter can’t be beat! Lightweight, compact and remarkably capable it gets the job done and saves you money. Outfit your whole crew with these! Colors vary.

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5 Responses to “Sinometer DT830B 20-Range DMM & Battery Tester”

1. NLee the Engineer says:

   May 11, 2010 at 12:00 am

   There seems to be a lot of confusions about this Sinometer DT830B 20-Range DMM & Battery Tester. For examples, some people complained that it has no battery testing function, while others complained about poor accuracy of this meter. Both accounts are not true – at least for the model I received.

   The source of the confusion is that there are two different digital multimeters, both called ‘DT830B’. Even when I search for “Sinometer DT830B” and land on the same Amazon product page, it seems to alternatively display two different product images:

   - One DMM (see Palm-Size Digital Multimeter, DT830B) has its three probe-sockets arranged in vertical direction. Its ON/OFF switch is integrated into the main dial, and there are no battery testing functions available. Its dimensions are 5 x 0.9 x 2.8″.

   - The DMM I received (see my Customer Image) has its three probe-sockets arranged in horizontal direction. It has a separate ON/OFF switch on the left hand side. On its main dial there is a rudimentary battery tester function. Its size is smaller at 3.8 x 1 x 2.2″.

   The battery tester function is nothing to get excited about. It simply pulls 4mA when connected to a 1.5V battery. So suppose you measure an alkaline battery and see a lower current such as 3.2mA, you know that the battery is roughly half-depleted. This is not useful for testing a rechargeable NiMH cell, because its terminal voltage does not change significantly until it is nearly exhausted.

   The DMM comes without an instruction manual. The only specifications were printed on the back of the box. I was skeptical about the claimed accuracy (+/-1.0% for DC voltage, for example), so I tested it against a professional DMM (HP 34401A). I was quite surprised by my findings:

   - For DC voltage and current, readings of the two meters differ by less than 0.5%

   - For resistance, the difference is typically about 1%.

   Some other observations are:

   - The DT830B’s input impedance is 2 Mega ohm for DC voltage (compared to 10 Mega ohm for the HP)

   - The maximum resistance value it can measure is 2 Mega ohm (compared to 100 Mega ohm for the HP)

   - It takes about 1 second to reach a stable reading (the HP takes less than 0.1 second)

   Considering that I paid only $7 for this little DMM, while a professional DMM costs over $500, I really cannot ask for more. But I do wish that it comes with a better instruction manual – just for people who never used a DMM before.

   (Hint: Google “How to use a DMM” if you need some general information or tutorial)

   Reply
2. Chris says:

   March 27, 2010 at 12:00 am

   I cannot recommend the multimeter, because:

   (1) It has NO battery tester.

   (2) The image is not identical with the real layout of the multimeter.

   (3) If I do comparisons with other multimeters the measured voltages are ~15% too high — I can only assumes my device is faulty…

   Reply
3. B. Christian says:

   March 23, 2010 at 12:00 am

   I received it in with a dead battery…replaced battery and used once.

   Next time about 2 weeks later didn’t work replaced battery again still no power.

   2 days past time to return so I have a new boat anchor!!

   Reply
4. M. Evans says:

   March 19, 2010 at 12:00 am

   So I just needed this to test some basic batteries around the house, nothing fancy or complicated. Just your standard AA, AAA, C, D and 9-volt. I’d read reviews of other competing products and learned that it’s better to us a load-tester and this is supposed to cover that base. But apparently this product was not made for people like me without an Electrical Engineering degree. The directions are way over my head and speak nothing of basic battery testing….at least not in layman’s English. So while the general consumer level products out there that focus on battery testing might not load-test them, at least they’re simpler to use, so now I have to go buy one of those….or enroll in my local votech school for an electrician’s course.

   Reply
5. D. Loewen says:

   March 15, 2010 at 12:00 am

   This is a nice little multi-meter for use around the house or shop. Haven’t had any problems with it but I also haven’t used it much either – mainly just to test batteries. The small size is great and the price was right. I like the fact that, unlike other meters I’ve used, it has a separate power on/off switch so you can leave the function dial where you use it the most. The only quibbles I have with it are that the 3 wire sockets aren’t clearly marked as to which wire goes where and the wire plugs stick up kindof high so they don’t fit into my carrying case if left plugged in. But these are minor issues. Overall you can’t go wrong for the money.

   Reply