So, when setting the range manually, how do you know which range to choose? Very simply, follow the same method that Autoranging uses:
- Start at highest (least sensitive) likely range, and – if the reading is less than 10% of full scale -.switch downward to more sensitive ranges.
- Work at the most sensitive range that is still above the maximum expected reading. You might ask: “What happens if the measurement is over the top of the given range? I know I should switch to a higher range, but meanwhile what will I see?”
- Up to 10% over – you’ll get a reading, together with the warning “OVER” in uppercase.
- Above that, you’ll get no reading, just the warning OVER, in lower case.
- In certain cases, when the sensor input is so high that the detector saturates, you might get a SAT warning instead of a lower case OVER warning. This may occur even before the reading is overrange.