Chapter 6 calibration and adjustment, Calibration interval, Factory calibration and adjustment – Vaisala HMT360N User Manual
Page 65: Chapter 6, Calibration and adjustment

Chapter 6 __________________________________________________ Calibration and Adjustment
VAISALA _______________________________________________________________________ 63
CHAPTER 6
CALIBRATION AND ADJUSTMENT
This chapter contains instructions for checking the calibration and
adjusting this product.
In this User's Guide the term "calibration" refers to comparing the
device's reading against a reference concentration. "Adjustment" refers
to changing the device's reading to correspond to the reference
concentration.
Calibration Interval
HMT360 is calibrated as shipped from the factory. Typical calibration
interval is one year. In demanding applications it may be advisable to
make the first calibration check earlier.
Factory Calibration and Adjustment
The device (or the probe only) can be sent to Vaisala Service Centers
for calibration and adjustment. See section
for contact information.
NOTE
HMT360 for natural gas must always be adjusted in a Vaisala Service
Center.