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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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15v supply for analogue testmeter high resistance range
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 |
#2
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15v supply for analogue testmeter high resistance range
On Thu, 19 Jan 2006 17:56:33 -0000, "David Sewell"
wrote: 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). -- ----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |
#3
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15v supply for analogue testmeter high resistance range
default wrote in :
On Thu, 19 Jan 2006 17:56:33 -0000, "David Sewell" wrote: 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. Or 5 CR123 3V lithium cells in series. You might even be able to use lithium coin cells. -- Jim Yanik jyanik at kua.net |
#4
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15v supply for analogue testmeter high resistance range
"Jim Yanik" wrote in message .. . default wrote in : On Thu, 19 Jan 2006 17:56:33 -0000, "David Sewell" wrote: 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. 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 |
#5
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15v supply for analogue testmeter high resistance range
"David Sewell" wrote in
: "Jim Yanik" wrote in message .. . default wrote in : On Thu, 19 Jan 2006 17:56:33 -0000, "David Sewell" wrote: 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. 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). 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. -- Jim Yanik jyanik at kua.net |
#6
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15v supply for analogue testmeter high resistance range
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 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. |
#7
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15v supply for analogue testmeter high resistance range
"Jim Yanik" wrote in message .. . "David Sewell" wrote in : "Jim Yanik" wrote in message .. . default wrote in : On Thu, 19 Jan 2006 17:56:33 -0000, "David Sewell" wrote: 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. 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). 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 |
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