Wöhler FA 320
3.4.2 Measurement
After having finished and left the size setting mode, there are 20 seconds waiting
time for you to put the vane to the outlet. During the 20 seconds waiting time, the
count down number will be displayed on the top left corner and the meeter will
beep when this time has finished.
If you want to start measuring immediately, just press the REC/START key to
start measuring the volume at once.
After having started measuring the volume, the meter will automatically count the
volume for 60 seconds to give an average value. During this 60 seconds, the
vane should be moved along the whole outlet to cover each area, so that the
measured data will be more accurate. The count down number is displayed on
the top-left corner as a reminder and the meter beeps, when the 60 seconds are
over.
After the time is up, the 60 seconds average volume will be indicated in the dis-
play.
If there is more than one outlet to be measured, press the ENTER key again to
repeat the procedure from the outlet size input. You can measure as many outlets
as you need.
After the measuring, you can press the Mx/Mn key to review the sum of all out-
lets. Press the HOLD key to review the last outlet volume.
3.5 Vane
Replacement
Before connecting a new vane it is necessary to enter the calibration values of the
humidity slope indicated on the enclosed paper. For that purpose follow the fol-
lowing steps:
-
While the meter is off, press the POWER key, the Mx/Mn key and the
REC/START key at the same time for more than 3 seconds to enter hu-
midity slope calibration mode.
-
Enter the S-value pressing the HOLD and the Mx/Mn key.
-
Press the ENTER key to save the new input.
-
Enter the Z-value pressing the HOLD and the Mx/Mn key.
-
Press the ENTER key to save the new input.
