Introduction: How to Fix Digital Calipers

In this instructable I will show you how to fix calipers that show a false value. It's worked for me and some other people and it should work for you.
The reason that it shows incorrect values is because is uses capacitance to measure the value and the circuit board van sometimes touch the metal.

Parts and tools:
Broken calipers
Tape
Small Phillips head screw driver

Step 1: Take Off Label

On the back of your calipers there should be a sticker that says metr. ISO take that sticker off and you will find screws under it.

Step 2: Take Off Screws

Unscrew the 4 screws then take the front off of the calipers and turn it around. You should see a circuit board that looks like this.

Step 3: Tape

Put a small piece of tape over the circuit board I used masking tape but scotch tape also works.

Step 4: Screw Screws

Screw the screws that you removed earlier and place the label on I left the label off because it didn't stick to the back.

Step 5: Thanks!

Thanks for viewing this instructable! I hope this worked for you!

Comments

author
souravg009 (author)2017-07-22

WOW!! it did worked. though error is getting accumulated. any suggestion?

author
mrunmoys (author)2017-05-25

Thanks a bunch. yuhuuuu! My calipers works now !!!

author
CarlosF86 (author)2017-01-25

it worked for me thanks

author
Mainul (author)2016-12-15

I was frustrated with two of my calipers bought from China.
Both of them are now working perfectly simply applying small pieces of scotch
tape as described above. Thanks a lot.

author
razvanesq80 (author)2016-10-14

WOW!! So simple and it works!!! My caliper never displayed correctly past 50mm, now working spot on the hole length! Thank you, I was just about to order a new one!

author
Way2go (author)2016-09-13

Silverline calipers rescued and working, after using this fix. I did have to remember to put back 2 rubber blades at the ends of the housing which appear to wipe the scale. The hardest part of the fix was sticking the label back on. Good tutorial!

author
espeaker (author)2016-08-08

Well I tried the fix maybe someone forgot a step. When I took my calpers apart

I found two (2) copper strips. both a mess lots of corrosion clean the copper up and guess what the calpers with fresh battery SR44W back in service.

author
ecominimalnick (author)2016-01-09

Brilliant! Sealey calipers that have always been erratic then stopped working at all. Now fine.

Thanks

author
Norkator (author)2015-12-25

I bought German made caliber which was messing up readings out of the box, I try cleaning it up first and oiling the rail but anything did not work. Then I found this article, did the trick and it works perfectly. It's like whole different caliber now. Now it always comes back to zero. Thank you for this tutorial!

author
JohnE50 (author)2015-11-11

Worked great, Thanks

author
AaronH10 (author)2015-06-18

It works! Brand new calipers from Digikey - had an incrementing offset out of the box. I did this fix and it works perfectly! Thank you so much.

author
Dimitrios (author)2015-01-06

I only logged in today to say thank you! It was bugging me for a couple of days, I hardly used mine, always kept nice in the box. Thinking it was the battery, bought a new one, same problem, numbers go crazy. Your fix did the trick! Thanks!

author
switch62 (author)2014-07-20

I now have a properly working caliper. Been broken for over 4 years.

I put the tape over the 2 screws on the white part of the circuit board, they sit above metal (when it's put back together). The green part of the circuit board sits over the plastic scale and can't short to any metal.

Never thought that it might be the screws shorting to the metal.

Thanks.

author
Zach Sousa (author)switch622014-10-19

Your welcome!

author
CC-2224lCody made it! (author)2014-07-16

Thanks a lot, it saved my caliper :-)

IMG_20140716_171313.jpg
author
Zach Sousa (author)CC-2224lCody2014-09-20

Your welcome!

About This Instructable

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Bio: My name is Zach Sousa and I'm a Canadian highschool student that has a passion for making.
More by Zach Sousa:CNC Oak Watch BoxCNC Camera SD Card HolderEdge 3D 3.0 - A $200 3D Printer
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