Originally Posted by Claire Senft
I must say the thought that a mercury thermometer enclosed in etched glass
being able to go out of calibration to be very surprising news that I find hard to fathom.
How could this happen?
Originally Posted by Roger Hicks
Roger and Claire,
I posted a URL above where you can read all about LIG thermometers going out of cal. Maybe you missed my reference. I'll post it here again.
One time a thermometer was found to be out by 10 degrees:
"[font=Arial]We have had, on rare occasions, thermometers submitted for a periodic re-calibration which at first examination appeared in excellent condition, but did not function properly; an examination under the microscope revealed a nearly invisible stress crack in the bulb through which a quantity of mercury had escaped - [color=blue]changing the reading of the thermometer in excess of 10 degrees C [/color]"[/font]