This is an old model. It screwed up on me years ago and I put it in storage. Recently retrieved it and installed new Lithium Battery. Set it up on hard surface..."zeroed" it...got on and all I get is "ERR". Any suggestions would be greatly appreciated.
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On Amazon this scale got 24% 5 star and 43% 1 star rating.
In many cases it quit working or broke in some way.
"I owned this model for 1 year before it gave me the "batt" signal. after I spent another $7 on new lithium batteries, it turned out the scale was broken. looking on the web, I discovered lots of other stories like mine. advice: find another brand."
90 day warranty on this scale to begin with so when battery dies after 10 years, you have no warranty to preserve. Royal EX2 Exacta Scale - royalsupplies.com - manual downloadable.
You will need a Phillips #1 and I think a #0 for best fit. 2032 lithium coin battery (fresh, so it will last another 10 years).
1) Peel off large label from bottom (Xacto knife to get under a corner).
2) Remove 3 screws attaching pan to mechanism. Use magnitized P0 screwdriver here.
3) Remove 4 rubber feet, and four P1 screws under them.
4) Opposite side of display from the button is the black battery case. Use P0 screwdriver to remove three screws. Replace battery.
5) Put back together...
Don't mess with the mechanism inside (at least not if you want a calibrated scale) any more than you have to while changing the battery.
Battery Replacement Instructions 1. Turn over the scale and open the battery door. (Push ribbed switch and pull up) 2. Replace old batteries with two new 3V Lithium batteries (CR2032). 3. Close battery door. 4. Properly dispose of old batteries.
There is nothing holding the batteries in place once the battery door is opened. If the batteries are difficult to remove, use a small screwdriver to gently pry up on the battery or simply after opening battery door invert the scale and shake.
I have a 10 year old Thinner bathroom scales also. Apparently the manufacturer designed it to make battery replacement hard so you'd buy a new scales. To replace the battery, if your unit is similar to mine, turn it over, remove all the screws and separate the top and bottom. You'll see the glass window that shows the weight. It is held in place by four tabs that are slightly twisted. Straighten them, lift the glass assembly clear without straining the wires, and turn it over to reveal the round black battery case. It is secured by three small screws and clear epoxy. Remove the epoxy with a knife blade, remove the screws, and separate the two halves of the case on one side being careful not to separate the other side where there is a metal connection piece. Using the knife tip, remove the CR2032 battery and replace it with a new one (available at Radio Shack or similar stores). Reassemble in reverse order; no need to replace epoxy. My scales worked fine after that.
Lithium batteries should last about 3-5 years. That really depends on the amount of use, the way the unit is stored and even things like temperatures. If you replace the battery you need to make sure that the battery is fresh and not old stock. Thats another thing that will cause premature battery death is old stale batteries. Unfortunately the original batteries tend to fall into two types, better than you can find or a lot worse. If you are using the scale a lot ie several people using it then the batteries will also drop off pretty quick. Even in heavy commercial use the batteries should be good for well over a year.
Remove the batteries and clean both ends of the batteries with a pencil eraser. Do the same with the contact points in the scale. This should help. Bathrooms are damp, you may want to set it elswhere for reliable use.