The DT830B is a Digital Multimeter that can measure AC and DC voltage, DC current, and resistance. It has diode and transistor test functions as well. It is a compact pocket-sized 3½ digit meter and one of the cheapest currently available on eBay. The photographs and circuit diagram in this article may be of interest to engineers who need to repair their meters.
This meter has Chip on Board (COB) package inside, and the 830 designation leads me to believe that this meter has the Intersil ICL7106 single chip solution, or perhaps a variant of that design. This meter is very similar to the Mastech M-830B Multimeter that I reviewed earlier, except this one produces an HV symbol on the Liquid Crystal Display (LCD).
This is an affordable pocket meter that works reasonably well for the price. I bought this gadget on eBay and paid £1.98, which includes postage. I was not expecting anything to arrive, however two weeks later it arrived all the way from China, in a neat little box. I decided to write this article because I was amazed to see how cheaply they are able to manufacture these gadgets and send them.
Battery
MS8301B Digital Multimeter - Operating environment and condition: 600V CAT III, pollution grade: II - Elevation meter when temperature. Yes, the mas830B is a simple multimeter, but it’s useful at home or even in the office. The tool allows you to measure both DC and AC voltages. Like other multimeters, you can use it to measure DC current and resistance. Electronic and electrical engineers find the 830B useful and handy in their work.
This meter operates on a standard 9 V (NEDA 1604 6F22) type battery. I installed it with this battery and tested some of the functions, and surprisingly it seems to be working fine. It will also display the battery symbol, with a depleted battery.
High Voltage
The plastic jack sockets are marked with CAT I 1000 V and CAT II 600 V. The conductors of the octal socket are buried 6 mm deep to provide reinforced insulation. This additional insulation ensures that this instrument meets the CAT II safety standard, as well as the IEC61010 requirements; however, I have not tested the high voltage capability.
Transistor Test
I tested a couple of faulty transistors, and it provided accurate readings, which was very impressive for this little gadget.
Other Models in the 830 Series
The meter unpacks with a small user manual in which the manufacturer indicates that they have other models with additional functionality. There are models that can measure temperature, provide audible continuity function, and even a signal generator function. The DT830D has a signal generator function, and the DT830C and DT830E can measure temperature.
Conclusion
I tested it for low voltage and low current applications up to 20 V and 1 A and it seems to be operating fine. The resistor measurement is good enough, and the transistor test was accurate enough to be of some usefulness. The diode test was also fine. This might turn out to be a good product for beginners and hobbyists working with low voltages.
The cost of a meter can vary from as little as two pounds, such as the one shown here, to several hundred pounds. It certainly seems possible to obtain a very low-cost meter that performs a reasonable job of measuring low voltages, for hobby and student use. With the current inflation, child poverty rising, shrinking education budgets, many students might be interested in buying this.
This Article Continues...
DT830B Digital Multimeter
DT830B Inside View
DT830B Range Switch Assembly
DT830B Transistor Test
DT830B DC Voltage
DT830B Resistance Measurement
DT830B Diode Test
DT830B Current Measurement
DT830B 10 A Setting
Ms8301b Digital Multimeter Manual Pdf
DT830B AC Voltage Measurement
Ms8301b Multimeter Manual
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