KCM-3100 Color MeterDescription Ambient Light Readings First set the appropriate film type, choose the display mode and memory channel (if present). Set the Mode switch to AMBI, then simply aim the meters light receptor at the scene and press the measurement button. Measurement readings will be calculated and appear in the almost immediately and color temperature measurements will be taken as long as the measurement button is held down. The KCM 3100s measuring range for