15v supply for analogue testmeter high resistance range

[David Sewell]

Hi ya,
I got an old TMK multimeter. The 15v battery for the highest resistance
range needs replacing. It is a number 504. Any suggestions please on a
cheap and compact way to substitute this battery?
Thanks,
Dave

 

[default]

Hi ya,
I got an old TMK multimeter. The 15v battery for the highest resistance
range needs replacing. It is a number 504. Any suggestions please on a
cheap and compact way to substitute this battery?
Thanks,
Dave

Not familiar with TMK. Assuming it is a bridge circuit, and there's
enough room, two nine volt batteries in series may work. Check the
schematic to see if the resistors can dissipate the power
(particularly the zero adjust)

504 batteries are still stocked and available $7 each (US)

Good project there, if you want to fool around. DC/DC converter
running from a D battery (assuming it uses D for the low ranges).

 

[Jim Yanik]

default wrote in

Not familiar with TMK. Assuming it is a bridge circuit, and there's
enough room, two nine volt batteries in series may work.

Or 5 CR123 3V lithium cells in series.
You might even be able to use lithium coin cells.

 

[David Sewell]

default wrote in

Or 5 CR123 3V lithium cells in series.
You might even be able to use lithium coin cells.



--
Jim Yanik
jyanik
at
kua.net

Thanks Jim, actually that's an idea I never thought of ( 2 x 9v bats). Bit
of tinkering etc ...yes! Lithium I think too expensive though.
Thanks,
Dave

 

[Jim Yanik]

Thanks Jim, actually that's an idea I never thought of ( 2 x 9v bats).

The 2 9V battery idea was the other poster's idea.

Bit of tinkering etc ...yes! Lithium I think too expensive though.
Thanks,
Dave

The 123 cells are only expensive if you buy them from ordinary sources.
check out Surefire's prices in quantity.

Lithium coin cells would give the best fit.

 

[mc]

Hi ya,
If this is the same battery that is used in the Triplett 310, it's still
available from test equipment dealers.

The Triplett 310 is a living dinosaur, I mean classic.

 

[David Sewell]

The 2 9V battery idea was the other poster's idea.

Jim Yanik
jyanik
at
kua.net

Thanks again Jim. Strange, You are the only reply to my question showing on
my screen. So I thought it was your idea.
David