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what voltage is my mitutoyo digital readout

I have a 6" mitutoyo digital caliper that I bought in 1995.For quite a few years it gave me good service. 2 or 3 years ago it developed a habit of giving a reading of E - -o5 whenever it was colder than about 50 deg f. A new battery cured that for awhile but now it does it even with a brand new one. It uses a

357 which is rated at 1.5 v but my meter says the no load voltage is 1.600. I'm wondering if my problem is partly due to the caliper becoming more voltage sensetive as it ages? Is there a battery the same size as the 357 that puts out 1.65 or 1.7 volts that I could try to see if it cures the problem or would that be too much for my caliper? Engineman1
Reply to
Engineman1
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It sounds like it is dying. The voltage for standard button cells is 1.5 volts. The silver batteries are 1.3 volts as I remember. There are no standard batteries that have a voltage of 1.7 volts.

It is possible that there is a crack in the circuit. You could try opening it up and pressing on the various components. If you find a sensitive spot you could try reflowing the solder. This might close up a crack. Otherwise it is probably dead.

Pete.

Reply to
Peter Reilley

Cracks are possible - might not be on the IC but an interface - the analog.

Typically there are P and N type transistors inside the IC's. Temp changes them differently.

Does it function well in room temp - is it an expansion (hard to tell)...

Maybe it turns >

Reply to
Martin H. Eastburn

If you live in a large city, look up the Mitutoyo distributor and take/send it back to him.

In my experience Mitutoyo has the best customer service going.

If it's something major you can expect to have to pay for the repair, but it's not unusual to get instruments fixed for free.

DOC

Reply to
DOC

Hmm ... one thing that it could be is the battery contacts in the holder oxidizing (unless they are gold plated). You might try rubbing them gently with a pencil eraser and replacing the batteries. (Rub the ends of the batteries, too.)

Good Luck, DoN.

Reply to
DoN. Nichols

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