Vaisala HMT360 - Manual (Page 63)

Chapter 6 __________________________________________________ Calibration and Adjustment
VAISALA_______________________________________________________________________ 61
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
Technical Support on page 74 for
contact information.
User Calibration and Adjustment
Calibration and adjustment is carried out by using the keypad or by using
serial commands. The following additional equipment is needed in
adjustment of HMT360:
- a power supply for the channel(s) to be calibrated (12 ... 24 VDC),
- a multimeter for HMT360 without a display, and
- the calibrated references.