I have a question regarding the spring type bow scales. I found one in my Dad's shop and would like to use it but was wondering how to check it's accuracy and also if there is a way to calibrate it if it is off? I did a search on here but did not find anything. Thanks Flint
Flint, how about pulling back a bow that you know the weight on? If it is an older scale, that cannot be adjusted you may just need to make note how many pounds it is off + or -.
Brad, I think I can do that. No calibration huh?
Most spring scales have an adjustment screw on the back or bottom. I have taken a barbell and weighed it on a bath scale and then hang it from the spring scale. That will get you pretty close.
CTT
witch one do you have
(http://i704.photobucket.com/albums/ww42/ProArcher/hanging2.jpg)
(http://i704.photobucket.com/albums/ww42/ProArcher/handheld.jpg)
It is like the top one.
If you have any weight lifting equipment around your house take a 20# weight and hang it from your scale weight lifting equipment is fairly accurately measured. See how close the weight on your scale is the weight.
A gallon of water weights 8.34 lbs. How many empty milk bottles do you have available?
Guy
The one you have ( top pic) has a screw on the bottom that is your calibration screw.
Thanks guys.