User`s guide

Chapter 9 _______________________________________ Calibration, Adjustment, and Maintenance
CHAPTER 9
CALIBRATION, ADJUSTMENT, AND
MAINTENANCE
Calibration
DM70 is fully calibrated and adjusted as shipped from the factory.
The typical calibration interval is one year. Calibration must always
be done when there is reason to believe that the device is not within
the accuracy specifications.
The device can be sent to a Vaisala Service Center for calibration and
adjustment, see contact information in section Vaisala Service Centers
on page 78.
User Calibration and Adjustment
In this User's Guide the term "calibration" refers to comparing the
device's reading against a reference value. "Adjustment" refers to
changing the device's reading to correspond to the reference value.
After the adjustment, the original calibration certificate shipped with
the product is no longer valid. Read the instructions through carefully
before making any adjustments.
NOTE
Dewpoint calibration should be carried out in Vaisala or in other
laboratory conditions.
VAISALA _______________________________________________________________________ 65