Cen tech meter

[Mike Muderick]

I just picked up a cen-tech P30756 DMM- used - no instruction manual. It
seems to be quite functional but does have a variance when compared with an
older Radio Shack DMM
e.g.
35VAC vs. 36VAC on one measurment
117 vs. 122 on another
..6 volt difference on measuring a 9 volt battery.

1. Does anyone have an instruction sheet they can fax /mail me?
2. There is an adjustment pot inside- is there a way to calibrate it or
should I just leave it as-is?

Thanks- email response would be helpful
Michael Muderick
Michael@muderick.com

 

[Tony Marsillo]

Mike,
That meter is sold by Horbor Freight. See the link below.

http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=30756

--
Tony Marsillo
Nutmeg Repair
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"Mike Muderick" <mike@muderick.com> wrote in message
news:7vEOb.3950$9L4.1233@nwrdny03.gnilink.net...

I just picked up a cen-tech P30756 DMM- used - no instruction manual. It
seems to be quite functional but does have a variance when compared with
an
older Radio Shack DMM
e.g.
35VAC vs. 36VAC on one measurment
117 vs. 122 on another
.6 volt difference on measuring a 9 volt battery.

1. Does anyone have an instruction sheet they can fax /mail me?
2. There is an adjustment pot inside- is there a way to calibrate it or
should I just leave it as-is?

Thanks- email response would be helpful
Michael Muderick
Michael@muderick.com

 

[Chris Oates]

"Mike Muderick" <mike@muderick.com> wrote in message
news:7vEOb.3950$9L4.1233@nwrdny03.gnilink.net...

I just picked up a cen-tech P30756 DMM- used - no instruction manual. It
seems to be quite functional but does have a variance when compared with
an
older Radio Shack DMM
e.g.
35VAC vs. 36VAC on one measurment
117 vs. 122 on another
.6 volt difference on measuring a 9 volt battery.

1. Does anyone have an instruction sheet they can fax /mail me?
2. There is an adjustment pot inside- is there a way to calibrate it or
should I just leave it as-is?

don't think I'd be trusting a $2.99 meter

to tell the truth about anything
http://tinyurl.com/2ryce

 

[JURB6006]

That's a very cheap meter, I got one but I only use it for quickie
continuity/diode type checks. Be happy it is as accurate as it is, know it's
limitations. For accurate measurements I use a Fluke.

I wouldn't try to calibrate it or anything, just use it and if you drop it or
spill acetone in it, laugh and shell out $3-$6 for another one. I save my $300
Fluke for when I need it.

JURB