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About the Radio-Shack (Tandy) 22-175b multimeter

G

GregS

Jan 1, 1970
0
Hello

They say in the booklet a resulution of 1 pf, well it seem that it's not true.

I will look for another meter for real 1 pf resolution.

Thank everybody.

Bye

Gaetan

I guess you didn't get it. If you did like I say using a connector board
combination to get rid of the leads, measuring should be no problem.
As long as the .1 nF is constant. It seems your display goes to .001 nF
like my Fluke 189.


greg
 
G

Gaetan Mailloux

Jan 1, 1970
0
Hello

I just found a Metex DMM with capacimeter foction and a zero buton, so I
can do a zero with any lead I would use or wen I use the socket. It's work
since I did measured a 15 pf capacitor with 5 % precision.

Thank all

Bye Gaetan

GregS ([email protected])
writes:
 
G

GregS

Jan 1, 1970
0
Hello

I just found a Metex DMM with capacimeter foction and a zero buton, so I
can do a zero with any lead I would use or wen I use the socket. It's work
since I did measured a 15 pf capacitor with 5 % precision.

Another cheap meter I guess. I actually bought one from Jameco
over 15 years ago. It claimed very good accuracy. Mine has worked
well, and mine has a analog front panel adjustment screw and
there are no leads for the capacitor input. There is a front panel
socket area for different sized caps. I never had any problem with this
meter.

I just looked at it again since I have mostly been using the Fluke.

greg
 
D

Daveolla

Jan 1, 1970
0
Hello

I have a Radio-Shack (Tandy) 22-175b digital multimeter.

Wen I use it to measure capacitors it do not do it's 0 before measuring,
even without any wires plug to it there is alway a .1 nf reading, there is
only two trimpots on the pc board, how can we reajust to have 0 ?

Any body would have the schematic diagram for that meter ?

Thank

Bye

Gaetan

Greetings, 22-175b Press and hold untill it beeps the "Hold/Relative"
button. The meter will zero out testleads.

Also the old Dataprecision 938 cap meter has .1% basic accuracy + 1
digit + .5pF .1pF to 1,999uF also has ten turn 0 adj pot . Beats the
specs off the B+k 830!!
Dave
 
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