Sper Scientific 840034 Psychrometer - Anemometer - Manual (Page 14)

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During the 60 second measurement time, move the probe
to cover the entire area so the measured data is more accu-
rate. The count-down time displayed on the top left is a re-
minder, and the unit beeps when 60 seconds is up.
After the 60 seconds is up, average volume will display on
the LCD.
If there is more than one outlet size, press
Enter to repeat
the procedure for outlet size input. You can measure as
many times as necessary.
After measuring more than one outlet volume, you can
press
Mx/Mn to review the sum of all outlets. Press the
Hold button to review the last outlet capacity.
MEASUREMENT PROCEDURES