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.

Commercial Electric Digital multimeter Item # 1001 418 355 Model # MS8301A. Retain this manual forfuture use. Questions, problems, missing parts? Before returning to the store, call Home Depot Customer Senrice 8 a.m. 7 p.m., EST, Monday - Friday, 9 a.m. 6 p.m., EST, Saturday. The Commercial Electric Manual Ranging Digital Multi-meter MS8301B features solid structure and rubber shell. The multi-meter features data hold, back light, flash light. Non-contact detecting and temperature testing.

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).

Review (mpn: MS8301B for sale) MS8301B COMMERCIAL ELECTRIC Auto Ranging Digital Multimeter Free Shipping Brand new auto ranging digital multimeter from COMMERCIAL ELECTRIC. Part: MS8301B prices. MS8301B Digital Multimeter - Operating environment and condition: 600V CAT III, pollution grade: II - Elevation meter when temperature.

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

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

Ms8301b Digital Multimeter Manual

DT830B Diode Test
DT830B Current Measurement
DT830B 10 A Setting
DT830B AC Voltage Measurement

Ms8301b Multimeter Manual

Intersil ICL7106 and ICL7107

Your digital multimeter should last for a number of years with reasonable care. There may come a time when your multimeter malfunctions, and you’ll have to decide whether to repair it or buy a new one. Before going out and looking for a new multimeter, you should use the Digital Multimeter Troubleshooting and Repair as the final effort to save your meter. The EPA estimates that, in 2009, US consumers and businesses discarded televisions, computers, cell phones, and hard copy peripherals (including printers, scanners, faxes) totaling 2.37 million tons.

The first step of troubleshooting is to check the battery and, try to power on your digital multimeter.

• If the multimeter doesn’t turn on or the display is dim you may have a weak or dead battery. Simply replace the battery and you should be good to go.
• If your multimeter powers up but you aren’t getting accurate measurements you may have faulty test leads. Set your multimeter to read resistance and touch the test probe leads together. It should read zero ohms.
• If you have resistance ratings of over one ohm or the reading is erratic, you should be able to fix the problem by replacing the probe leads.
• If you still haven’t been able to address the issue the next step is to disassemble your digital multimeter. Use a small screwdriver to remove the screws holding the case together.

Ms8301b Digital Multimeter Manual Pdf

Second, let check the fuse, since you’ve opened the multimeter locate the fuse and remove it.

Ms8301b Multimeter Manual

• If it’s a clear glass fuse inspect the inside to see if the thin wire within is burned out.
• If it’s blown, replace it.
• If it’s a ceramic fuse you’ll have to check its resistance with another multimeter.
• If there is no resistance, you’ll need to replace it. (Consult your multimeter’s manual to find out which fuse you need.)

Finally, for wires and other connections that may be corroded or broken.

• If you do find a damaged connection desolder it with a soldering iron and wick and resolder it.
• Check for loose parts or screws inside the multimeter’s case and fix them in the appropriate way.

Ms8301b Digital Multimeter Manual

Reassemble your digital multimeter, set it to measure resistance, and touch the probe leads together. It should read well under one ohm. The Digital Multimeter Troubleshooting and Repair is a basic repair process. If the multimeter is still malfunctioning, it may be time to replace it.