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

"Engineman1" wrote in message
...
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

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.

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 into a office tool not a shop tool. Maybe you need to have
a 'caliper' warmer like a welding rod warmer... keep it warm and use it -
put it back. Hot tape or a warming pad...

Martin
Peter Reilley wrote:

"Engineman1" wrote in message
...

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


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.




--
Martin Eastburn, Barbara Eastburn
@ home at Lion's Lair with our computer
NRA LOH, NRA Life
NRA Second Amendment Task Force Charter Founder

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


"Engineman1" wrote in message
...
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

In article ,
Engineman1 wrote:
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?

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.

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