check ranges for good exceptions

[untzag]

The range/span of each analog input. Write the highest expected input voltage.

Default: 0
T8-specific:
    Valid values/ranges: ±11V, ±9.7V, ±4.8V, ±2.4V,±1.2V, ±0.6V, ±0.3V, ±0.15V,±0.75V, ±0.36V, and ±0.18V
T7-specific:
    Valid values/ranges: 0.0=Default → ±10V. 10.0 → ±10V, 1.0 → ±1V, 0.1 → ±0.1V, and 0.01 → ±0.01V.
T4-specific:
    Valid values/ranges: 0.0=Default → 0-2.5 V on LV lines and ±10 V on HV lines.