Vaisala PTB330 - Manual (Page 113)

Chapter 6 ___________________________________________________Calibration and Adjustment
VAISALA ______________________________________________________________________ 111
CHAPTER 6
CALIBRATION AND ADJUSTMENT
This chapter contains instructions for performing the calibration and
adjustment of the product.
The PTB330 is fully calibrated and adjusted as shipped from the
factory. Calibration must be done always when there is reason to
believe that the device is not within the accuracy specifications.
When defining the calibration interval, you must the local long term
specifications and other requirements into consideration. Contact
Vaisala Service Centers for details.
It is recommended that calibration and adjustment should be carried
out by Vaisala. See sections Technical Support and Product Returns
on page 110. Calibration and adjustment are carried out through the
serial port or with the optional display/keypad.
Pressure
You can select a simple offset or a two-point offset and gain
adjustment for the barometer module using the LCP command. The
MPCP
command is for the more sophisticated multipoint adjustment
with up to eight pressure levels.
NOTE Entering new linear or multipoint adjustments cancel the previous
adjustments. It is advisable to write down the previous linear and
multipoint adjustments so that they are not lost by mistake.