I bought one of those 2.99 HF digital multimeters(item 90899) that were
offered during their sidewalk sale,and the meter read several 1.5v
batteries as 1.8-1.9 volts,far out of spec(1%,+/- 2 counts).I returned
it,no questions asked,and the 2nd meter reads properly.
It is not a serviceable meter,either.It's chip-on-board construction,and
there were several solder splashes across tracks on the inside.
Well,whadda ya expect for 3 bucks... ;-)
DO NOT use this cheap meter to read high voltage circuits. Cheap
meters can potentially blow up in your hand if you try high voltage.
I've had this happen. Get a good meter for anything more than
batteries. It is well worth the investment.
whats the meter rated for ???.... around the house it probably wouldnt
be bad or for some sort of residential work....but for the most part
these el cheapos...are used around the house and for that they are
Most meters I own are good for 1000 volts at least...but I have one
really really nice hioki that got from some slob off ebay for 25.00
thats only rated at 300 volts....dont know why it has this rating...its
a very upper end meter ..original owner didnt know what he was
selling..~:>....just made for use outside the USA...
I use it around the house and for general electronics work....
Ive never had a meter blow up in my hands....I used to use an old radio
shack digital to measure current on high voltage transformers....15
kilovolt...7800 kilovolt......It held up for years......finally "blew
it" when I put too many amps thru it....but all I heard was a pop..got
the fuse AND the electronics... Just the meter and regular leads
though...everything layed out on plastic sheeting though...leads
When your fuse opened(opening the current shunt),then the entire voltage
was across the DMM;that's why it failed.
I doubt the HF meter case is insulated for much over 1 KV.
The meter leads are not either,I suspect.
One thing I did not like about the HF meter when I opened it up was the
resistor voltage divider,just several discrete resistors too closely
spaced,and mounted vertically with the top wire looped back to the PCB.
That could cause problems for measuring higher voltages-too close a lead
spacing may allow leakage.
The 9V battery supplied was a "heavy duty" zinc-carbon type,not very long-
life,and more prone to leakage than alkalines(except for Duracell).
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