Mastech M-830B Multimeter

This is a really nice pocket sized meter designed around the Intersil Intersil ICL7106 and ICL7107. I bought this one from an online electronics shop for a fiver including postage.  There are also cheaper versions of this selling as Tool Tech DT830B, and simply DT830B Digital Multimeter which is the cheapest one I have bought on eBay and costs around 2 pounds including postage, and comes from China.

This digital multimeter does quite a lot for something so small and cheap, you can check AC and DC voltages up to 600 volts, DC current up to 10 amperes, resistance up to 2000 kilo ohms, which makes this tool an excellent choice for electricians, and students.      

You can also measure the hFE value of a transistor, which is very useful for an electronics student who is learning how to bias a transistor in the Analogue Electronics class.

The fact it doesn't have a audible continuity check buzzer is actually a good thing as the last thing you want is a class of students with beeping buzzers. The plastic case is also very tough, I keep it with the rest of the tools and it gets thrown around a lot.

Large analogue style meters are great for the bench, but if you need something small and pocket sized for the field then this meter is very handy. I like Digital Multimeters and test instruments and the smallest meter I have is wallet sized and looks like a calculator.

This meter uses a Mastech M-830B Battery (6F22 / NEDA) that can last for many hours of use. I once forgot to switch it off and the meter was still operational in the morning.

Mastech is a large company that designs and builds quality multimeter measuring instruments. I use this meter a lot on the field and I also have the vintage Avo Meter 8 MKII as shown here that I use on the desk.

Model: M-830B
Company: Mastech
Manufacturing Origin: Hong Kong
Power supply: 9 V Battery 6F22(9 V) or NEDA 1604
Low Battery Indication: BAT appears on the display.
Safety Fuse: 250 mA  / 250 V
Measuring method: Dual slope integration method A/D converter.
Maximum Current Handling 10 A
Resistance measurement: 200 Ω, 2 kΩ, 20 kΩ, 200 kΩ ±0.8 %, 2 MΩ ±1.0 %
Display: 15 mm × 46 mm LCD, 1999 Maximum.
Transistor Test PNP / NPN
DC voltage: 200 mV, 2 V, 20 V, 200 V ±0.5 %, 600 V ±0.8 %
AC voltage: 200/600 V ±1.2 %
DC current: 200 μA, 2 mA, 20 mA ±1.0 %, 200 mA ±1.5 %, 10 A ±3.0 %
Diode check: Test current 0.8 mA, Test voltage 3 V
Weight: 170 g
Size: 70 mm × 126 mm × 25 mm

Digital & Analog Multimeters
Mastech M-830B Multimeter
Mastech M-830B Inside
Mastech M-830B Transistor Test
Mastech M-830B DC Voltage
Mastech M-830B Resistance
Mastech M-830B Diode Test
Mastech M-830B AC Voltage
Mastech M-830B DC Current
Intersil ICL7106 and ICL7107

Author: Peter J. Vis