Manual

USER'S GUIDE____________________________________________________________________
information for Vaisala Service Centers on page 35. Figure 6 on page 27
illustrates the difference between offset and gain calibrations.
Two-Point Humidity Calibration
Procedure
1. Leave the calibrator and the probe in the same environment for at
least one hour so that their temperatures have time to equalize. For
information on more accurate stabilization times, see Chapter 4,
Installation, on page 17.
2. Insert the probe into the measurement hole of the LiCl salt chamber
in the humidity calibrator.
3. Wait for 20 to 40 minutes.
4. Check the temperature and read the closest corresponding RH
value in the calibration table (Table 5 on page 25).
5. Connect the jumper to the RH offset pins (see Figure 5 on page 25)
and adjust the output signal with push buttons to the value given in
the calibration table (Table 5 on page 25).
6. Insert the probe into the measurement hole of the NaCl chamber.
7. Wait for 20 to 40 minutes.
8. Check that the reading corresponds within the desired accuracy to
the reading given in the calibration table. If not, connect the jumper
to the RH gain pins and adjust the reading with push buttons.
9. Check again the reading at the first point and repeat the procedure
if necessary.
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