Using the Sun to Measure LDR

Use the sun to measure LDR. The measured value of LDR is the XDR offset.

  1. Measure the LDR in fixed mode for both LDRH and LDRV.
  2. Check that the values are reciprocal (for example, +1 dB and -1 dB).

    If the values are not precisely reciprocal, use the average of the absolute value (for example, for +1.4 and -1.2, use 1.3).

  3. Enter the XDR value.
  4. Retest to verify that the sun has been properly corrected to have zero LDR.