PPM converter won't handle 1000ppm correctly

[CarolAnn]

the ppm converter is faulty as it won't accept 1000ppm correctly and the system adds the , for 1,000 but then treats it as a decimal point where none should be.
so if you type in say 5321 ppm it automatically changes the input ppm text to 5,321 and shows the answer as if you had really input 5.321ppm

[convert-me.com]

the ppm converter is faulty as it won't accept 1000ppm correctly and the system adds the , for 1,000 but then treats it as a decimal point where none should be.
so if you type in say 5321 ppm it automatically changes the input ppm text to 5,321 and shows the answer as if you had really input 5.321ppm

We've tested and were unable to reproduce the bug you describe. 5321 ppm is indeed automatically changed to 5,321 (only if comma is selected as digits separator). But the answer is shown for 5321 ppm as it should.
Could you try switching digits separator to "none" and see if it helps? You can change it in the settings box on the same conversion page.