Jonesma Lab:Protocols:Porometer

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Porometer

Calibration

1) Calibrate night before, but don't move once setup

2) Cut filter paper to cover holes on calibration stamp

3) Dampen filter paper, dry off excess and seal with parcel tape
Cut off excess tape with razor blade
Keep paper in bag to maintain moisture

4) Read ambient humidity in open air
Make sure ΔT <0.5

5) Attach to smallest aperture (postion #1)
Press Go
Double-beep indicates stable reading
Press Go to accept
Press Cycle to go to next reading
Once completed, fit curve error should be less than 5%
Press Install

Measurements

1) Shut window when measuring

2) Press red button on wand to accept after double beep

3) Measurements should be stored in memory for extraction

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