digital micrometer fault cured

[peterd51]

Hi,

some time ago I bought one of the cheapo digital micrometers off ebay, and it worked OK for a while. Then the display started showing odd characters and the instructions said remove the battery for 30 seconds to reset it.

That didn't work, so I tried a new battery but that didn't work either. I decided that I could still use it as a manual device and bought another one.

Six months later the battery died in this one and they're a bit pricey on the high street, so I used that one as a manual micrometer for a while too. Then a few days back I noticed that RDG Tools on Ebay sells five button cells for £3-odd so I bought some.

New cell in the newer device, working OK. New cell in the first one, still showing a row of '8's so I decided to remove the digital bit and bin it...took the four screws out the back.

There's a bit of circuit board that contacts the metal, probably has a sensor in it, and I wiped my finger across it...the display cleared back to zero!

After reassembling the micrometer it's working perfectly. It probably picked up some grinding dust, or something. I always put it back in it's box so I don't know how that happened, but it's something to watch out for.

Regards
Peter

 

[Sam]

Hi,

Six months later the battery died in this one and they're a bit pricey on the high street, so I used that one as a manual micrometer for a while too. Then a few days back I noticed that RDG Tools on Ebay sells five button cells for £3-odd so I bought some.

Peter

They must have saw you coming I got 30 for £4 on fleabay for my vernier.

 

[peterd51]

Hi,

nice, but what will you do with the other 29?

These cells are about a fiver /each/ from high street shops.

I used to sell them on the markets at £1.99 with free fitting, watches, car keys, etc.

But I reckon that my spare cells are starting to fade out as they're now a good few years old. I tried one of my cells and it only lasted a few days.

Regards
Peter

 

[scarecrow]

i got 5 for 3.99 for my welding mask they were 7 euro each on the high street

 

[Bsmith]

I'm on my second digi vernier too Peter. First one went blank, put in new batt, but still no good so I gave it to a kid that took a shine to it. Second one was fine for a while then dispalyed all sorts of digits, I tried your tip today but it did'nt help . I now have a dial vernier and ordianry micrometer.

 

[gavuk]

My digi vernier used to display odd numbers if i got coolant on it ,quick strip down,wipe then dry near a heater used to do the trick......got 3 now ...spares

 

[runnach]

My digi vernier used to display odd numbers if i got coolant on it ,quick strip down,wipe then dry near a heater used to do the trick......got 3 now ...spares

Three...........heaters or verynears?

 

[Bsmith]

My digi vernier used to display odd numbers if i got coolant on it ,quick strip down,wipe then dry near a heater used to do the trick......got 3 now ...spares

I'll give it a try thanks.
Its got the batt cover on the side and theres another smaller sliding cover above that reveals some elec contacts, whats it plz?

 

[gavuk]

verynears or "F"clamps as we call them ,including a giant display for when i forget me glasses

 

[shenion]

I'll give it a try thanks.
Its got the batt cover on the side and theres another smaller sliding cover above that reveals some elec contacts, whats it plz?

It is for a remote display. There is supposedly some standard for the connections.

I have the same caliper; currently waiting for yet another battery. Picked up 10 off ebay for this thing

 

[runnach]

verynears or "F"clamps as we call them ,including a giant display for when i forget me glasses

I have a broken set of verynears I keep handy, if a lad is getting up me nose, I'll swap them when he aint looking and give him a rocketing for breaking them, normally with the words, his company will have to replace them

 

[Bsmith]

It is for a remote display. There is supposedly some standard for the connections.

I have the same caliper; currently waiting for yet another battery. Picked up 10 off ebay for this thing

Ahh right, I had 6 batts off ebay too, looks like I could have sent you 5 of them because I don't think my vernier is going to work again, its been on a central heating rad all day and still u/s.

 

[Sam]

Ahh right, I had 6 batts off ebay too, looks like I could have sent you 5 of them because I don't think my vernier is going to work again, its been on a central heating rad all day and still u/s.

Bill you central heating is not working or have you done the repair to the Wood burner!?

 

[Bsmith]

Bill you central heating is not working or have you done the repair to the Wood burner!?

Yep did the repair before I posted the thread about the charnwood.


Brian.

 

[Sam]

Sorry Brian typed Bill had been speaking to Bill on the phone before I replied to the post.

 

[Bsmith]

Sorry Brian typed Bill had been speaking to Bill on the phone before I replied to the post.

Noooooo probs

 

[shenion]

Ahh right, I had 6 batts off ebay too, looks like I could have sent you 5 of them because I don't think my vernier is going to work again, its been on a central heating rad all day and still u/s.

Heh, just received 20 LR44 for $3.44 including shipping.

I also ordered 10 A76 size for my digital tire gauge. Then I found out the LR44 and A76 are the same batt.

So now I have 30 of them. Only cost me $7.44

Looks like my HP15 calculator, old Minolta SLR also use them. So, won't go to waste.

The pharmacy and electronics stores have them for near $3 each. So at least saved a fortune.

I think I bought the caliper about 8 months ago. Looks like they eat batts as they are always on.

 

[Bsmith]

Heh, just received 20 LR44 for $3.44 including shipping.

I also ordered 10 A76 size for my digital tire gauge. Then I found out the LR44 and A76 are the same batt.

So now I have 30 of them. Only cost me $7.44

Looks like my HP15 calculator, old Minolta SLR also use them. So, won't go to waste.

The pharmacy and electronics stores have them for near $3 each. So at least saved a fortune.

I think I bought the caliper about 8 months ago. Looks like they eat batts as they are always on.

Yep, think my last 1 is about 8 months old too. You mean its always on because you have it in use all the time or it don't switch off? Mine certainly switches off and its as much good then as when its on, just displays random digits

 

[shenion]

You can switch it off, slide it to a new position and switch it back on and it will still read the correct value. So it is never off. The on/off just controls the display.

 

[Bsmith]

You can switch it off, slide it to a new position and switch it back on and it will still read the correct value. So it is never off. The on/off just controls the display.

Ok, got it mate, cheers......