- Switch on at plug. Switch on at back of instruments. Set lever (W or D) to W.
- Select wavelength.
- Select "Set Zero T" on Z knob.
- Zero with the T knob.
- Set Z knob to "Measure".
- Select 0-1 with M knob.
- Put in blank
- Zero with ABS zero
- Put sample in same chamber used to zero the blank