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Old 28th February 2009, 01:29 AM   #1
diyAudio Member
Join Date: Aug 2008
Default I found a very versatile DMM since mine went bad

Here are the specs
Mastech Multimeter Lux Humidity Sound Level dB Meter
DCV: 400m/4/40/400/1000V, +/- 0.7%
ACV: 400m/4/40/400 +/- 0.8% 750V, +/- 1.0%
DCA: 400/4m/40m/400m +/- 1.2% 4/10A, +/- 2.0%
ACA: 400/4m/40m/400m +/- 1.5 % 4/10A, +/- 3.0%
Resistance: 400/4K/40K/400K/4M +/- 1.2% 40M, +/- 2.0%
Capacitance: 40n/400n/4m/40m/100mF 3.0%
Frequency: 10/100/1K/10K/100KHz/200KHz 2.0%, >200KHz,reference only
Temperature: -20 - 1000 degrees C (01,800 degrees F ) +/- 3.0% (C/F selectable)
RH: 2095%, +/- 5.0%
Lux: 4,000/40,000 Lux, +/- 5.0%
Sount dB: 40 100dB, +/- 3.5% @ 94dB
Diode test
Continuity tester: Buzzer if resistance is less than 40 ohms
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Old 28th February 2009, 05:57 AM   #2
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Join Date: Jun 2007
You forgot to mention the price.

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Old 28th February 2009, 07:47 AM   #3
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Join Date: Aug 2008
Default OK Bob and here the Price is ? and the contestant that is nearest

79.95 at multimeter depot these are new and just came out and the winner is Me! I bought 1
I found it on ebay but you can still get it at multimeter depot on the internet
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Old 28th February 2009, 08:43 AM   #4
AndrewT is offline AndrewT  Scotland
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Join Date: Jul 2004
Location: Scottish Borders
for a multi-purpose meter it specs very well.
I am so glad the designer saw fit to omit transistor hFE. Forcing one to use a proper test.
regards Andrew T.
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Old 28th February 2009, 08:57 AM   #5
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Default here is the mfg webpage

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Old 28th February 2009, 02:55 PM   #6
Ron E is offline Ron E  United States
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Location: USA, MN
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan
Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. Aldous Huxley
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Old 28th February 2009, 08:35 PM   #7
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Default this model replaces the ms8209 and on ebay

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Old 28th February 2009, 10:50 PM   #8
infinia is offline infinia  United States
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Location: Californication
Default Protek 6300 - 3 3/4 Digit DMM with Luminance, Sound level and Relative Humidity

also very similar or exactly the same
Mouser.com carries it MSRP $69 USD ie can be had for less
Harbor freight "had" a rebadged one a while back for around $39.
like four million tons of hydrogen exploding on the sun
like the whisper of the termites building castles in the dust
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Old 28th February 2009, 11:31 PM   #9
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I'm curious how sound level works?

Does it have a built-in microphone? Do you add your own external mic?

I also notice that the sound level frequency response is only 100hz to 8khz. That might be good for general sound levels, but not for detailed testing.

Is that limited by the internal mic and can it be improved by adding an extremal mic?

Still, it's a sweet meter for a very modest price.

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Old 1st March 2009, 09:40 AM   #10
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Default it has a microphone built into the bottom

There is a microphone, Light meter, temptature/ humidity I will bet some one around here will figure a way to tweek it to take a microphone sooner or later. That also bring up an interesting subject who can tell us how to make a califrated spl measuring microphone up 40khz that will work with it
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