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Product Specifications
Part Number DT830B
SizeCompact
ColorBlack
Power SourceDC
Item Package Quantity1
Item Dimensions
Weight3.04 Ounces
Length3.75 inches
Width1 inches
Height2.25 inches
Product Features
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Product Description
DT 830B series multi-meters are pocket-sized 3 1/2-digit digital multi-meters for measuring DC and AC Voltage, DC alternating current, resistance and testing diodes. Get this handy multi-meter today and save!
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Customer Reviews
Most Helpful Customer Reviews
27 of 28 people found the following review helpful
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)
[Update on March 8, 2012]
I should add that the meter is still working well after nearly two years, and I'm still using the original 9V battery that it came with.
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)
[Update on March 8, 2012]
I should add that the meter is still working well after nearly two years, and I'm still using the original 9V battery that it came with.
31 of 33 people found the following review helpful
As someone who only occasionally needs the services that a multimeter can provide, this is the perfect device. It's small, easy to store, accurate, and durable.
The unit I received looks much better than the one in the picture. It has a yellow plastic construction, comes with the black/red probes, and includes a 9V battery.
And although it is lightweight, it doesn't seem fragile at all. In fact, it seems very durable.
The instructions are marginally useful at best, but that's not really important since it performs to my expectations. And the price can't be beat. Definitely a handy device to have around the house.
The unit I received looks much better than the one in the picture. It has a yellow plastic construction, comes with the black/red probes, and includes a 9V battery.
And although it is lightweight, it doesn't seem fragile at all. In fact, it seems very durable.
The instructions are marginally useful at best, but that's not really important since it performs to my expectations. And the price can't be beat. Definitely a handy device to have around the house.
25 of 28 people found the following review helpful
Amazon Verified Purchase
I am extremely disappointed and feel deceived. Now that I can examine it up close, this is the exact same device I bought at a Dollar Store in a different color. I bought this because I wanted to test batteries under load to get a reading of how much power the battery still had. Old/used batteries can read 1.5 volts when not under load, but will quickly drop once a load is placed on it, hence the need to test them under load to determine if they are still good.
Anyway - as a cheap multimeter, it's fine. As a Battery tester with load - that's deceptive and why I give this 2 stars.
Anyway - as a cheap multimeter, it's fine. As a Battery tester with load - that's deceptive and why I give this 2 stars.
Most Recent Customer Reviews
wonderfull
It is perfect for many daily electrical task you must to do, not heavy and handle, is easy to read and very confident
Published 5 days ago by pipe
its great!!!
its a great product, even though i accidentally ordered this package... it still came to use because i always wondered if my speakers were connected to the correct ohms... Read more
Published 25 days ago by Chuy
At least it showed up
The unit I received looked like something from a dollar store. I put the batteries in it, it lit up for about 2 or 3 secons. The display then went blank and it never worked since. Read more
Published 28 days ago by Harpo
Doesn't work at all!
I had received this item a few weeks ago but never could get it to work. I am into electronics and know how a multimeter works. Unfortunately, this one does not. Read more
Published 29 days ago by Npen
The product is junk!
Sinometer DT830B 20-Range DMM & Battery Tester
The product is junk! First time I used it, the positive test lead melted, almost started a fire. Read more
The product is junk! First time I used it, the positive test lead melted, almost started a fire. Read more
Published 5 months ago by w
Incomplete/Defective
This multimeter came without a battery (9V). I had previously bought this one: [...] but the battery died. Read more
Published 5 months ago by HarroKitty
Corroded battery inside....
Timely delivery of a defective product. I attempted to use the multimeter the day it arrived. I switched it on and nothing happened. No display. Read more
Published 6 months ago by Online Shopper
Works, but not Long-Lasting
I used this little meter about three times several months ago. I got good readings and had no complaints. Read more
Published 6 months ago by J. Denhartog
Wouldn't recommend
Bought one for very simple connectivity measurements and dc voltage measurements. I loaded a new 9V battery in and couldn't get it to stay on. Read more
Published 8 months ago by John
Piece of crap!
This DVOM is a piece of crap. None of the scales register measurements accurately. Rather than go through the crap of returning it, I threw it in the trash!
Published 8 months ago by Get Serious
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