I received my lyman thermometer in the mail yesterday and im not sure it is working properly. When I took it out of the pack the needle was pointing to 1000 deg. I noticed that there is no stop for the needle to hold it on 0 deg. So I went ahead and melted some lead and it seem to be working but how do I know if it is correct? Is there something I can compare the temp to? maybe does COWW start to bubble at a certain deg? Or is there anything else I can use to know if it is functioning properly? Thanks in advance for the help.
Terry Swafford