Tesa “Digit Cal” caliper ( type 05.30032 ) lithium battery replacement

[Dinosaur EngineerParticipant @dinosaurengineer]

A basic question – Does anyone know how to change the lithium 2032 type battery on a Tesa Digit Cal 6″ electronic caliper type 05.30032 ?
I have removed the little clip-in wiper piece at the end of the sliding jaw ( next to the plastic thumb position projection) and can see the edge of the battery but cannot get it out . Do I have to remove the sliding jaw plastic cover ?  If I have to take the cover off, do I have to remove the two screws that adjust the sliding jaw fit on the longitudinal frame ?
I have tried asking the manufacturers without success.

Any help would be most appreciated as I don’t wish to damage the instrument thro’ ignorance .
Many thanks ,

[Dinosaur EngineerParticipant @dinosaurengineer]

[VersabossParticipant @versaboss]

Hi Dinosaur,

although I use another brand of caliper (with a 3032 battery), I understand your problem. It is sometimes difficult to remove this battery, as you say. But I am (almost!) absolutely sure that it is not necessary to disassemble the caliper.

I usually use either a pair of tweezers or one of these dentist’s hooks with a very sharp point. With this it is possible to grip the rim of the battery (with quite a bit of force) and so pull it out.

You can also try if the battery moves when you (after fastening the movable slider with the thumbscrew) hit your palm CAREFULLY, but decidedly, in the right direction, and so using the laws of inertia to your favor.

I hope this helps you a bit.

Greetings, Hansrudolf

[John OlsenParticipant @johnolsen79199]

I have used the sharp point of a scriber to hhok the edge of the battery up. I have wondered about using a small but powerful magnet since the casing of these batteries is usually steel, but haven’t tried that one yet.

 

John

 

 

[Dinosaur EngineerParticipant @dinosaurengineer]

Many thanks for comments . Have added photos to illustrate problem . I am wondering if this caliper was designed as a consumable item in view of the difficulty in battery replacement and the fact that the battery has lasted over 8 years to my knowledge !

Tried a strong magnet and tweezers without success.

I may try bonding a piece of 1 mm mild steel with a circular cutout to the battery in order to pull it out.

Thanks again

[TigermothParticipant @tigermoth]

I have seen this problem with other devices using these batteries. When (think positively) you get the battery out, cut a length of insulating tape to go round the new battery with a tab for pulling it out in the future.

You’ve been very lucky that the battery lasted so long. My first caliper battery lasted just over a month!

Bob

[Dinosaur EngineerParticipant @dinosaurengineer]

This Tesa Digit Cal calper has auto shut off after about 1 hour . Think this is the main reason why battery has lasted so long . Also I tend to use mikes for most of my measuring. Lithium batteries can last for over 10 years in low consumption applications . I’ll be very happy to get another 8 years use assuming I can get the battery out and a new one in without any damage !

[VersabossParticipant @versaboss]

Well it seems more drastically means are required. What about

a) soldering a copper wire to the rim of the battery (needs a small soldering iron, not the Sievert burner! 

b) drilling a small hole and screw in the point of a small sheet metal screw. This needs a Dremel or similar. I don’t know what’s inside, but at least it should not be under pressure I think.

Good luck, Hansrudolf

[John Stevenson 1Participant @johnstevenson1]

Yer not poking it hard enough.

 

Don’t dither man get a sharpened rake and poke it with the sharp end. Make sure you have a decent grimace on your face but don’t keep your mouth open, chances are when the battery lets go it will go down your throat / shirt neck / budgie cage [ delete as required .]

 

John S.

[Richard MarksParticipant @richardmarks80868]

Mr Dinosaur Sir,

I understand from your message that you have contacted Tesa and it appeared they were of no use, Exactly what answer did you get? I would have thought that a major manufacturer of precision measuring equipment would have a technical department capable of dealing with your problem. I previously owned a cheapie but the batteries lasted about six months, I eventually purchased a Mititoyu caliper and mike from J&L at a special offer price for both and have had no problems since.

Dick

[Dinosaur EngineerParticipant @dinosaurengineer]

Finally got the battery out !  I levered the battery up & down a little bit quite a few times and then got two sharp thin scribers either side of the battery and levered against the plastic cover on both sides and out it popped. New battery slides in & out very easily which leads me to think that the old battery may have corroded in position in some way . The old battery did show some corrosion type pitting only visible with eye glass. The caliper does now works as it did before.

My other digital calipers ( More & Wright ) require the whole cover to be removed ( 4 screws) with the batteries’ , ( 2X SR44),  access completely unobstructed.

I sent 3 Emails to Hexagon technical department ( “Owners” of Tesa ) without any reply . I think that unless you’re thinking about buying a CMM machine asking queries about a one-off old caliper will not illicit a response.

In the search of battery replacement instructions I did notice that a few american companies complained about the lack of maintenance information & spare parts for this model.

Edited By Dinosaur Engineer on 04/09/2010 14:11:20

[John Stevenson 1Participant @johnstevenson1]

Posted by Dinosaur Engineer on 04/09/2010 14:05:26:In the search of battery replacement instructions I did notice that a few american companies complained about the lack of maintenance information & spare parts for this model.

.

 

There are no spare parts for this model, everything inside is needed.

 

John S.

[M MegedParticipant @mmeged66200]

After many unsuccessful trials with sharp tweezers, screw drivers and sharp points I used a piece of hard paper, and slide it on both sides of the battery. I pushed it in and out and then the battery fall out.

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