Will an incorrect graduation size setting give an Error 1?

The graduation size is the minimum increment displayed by the instrument. On the HI 2151/30WC there are 9 acceptable grad sizes to choose from: 1, 2, 5, 10, 20, 50, 100, 200 & 500.  If you try to enter a grad size an ERR 1 will flash on the display.  The method to change the grad size is to use the arrows and then press enter.