Vaisala MMT310 - Manual (Page 61)

Chapter 6 ____________________________________________________ Calibration and adjustment
VAISALA ________________________________________________________________________ 61
Relative Humidity Calibration after
Sensor Change
Syntax: FCRH<cr>
The transmitter asks and measures relative humidity and calculates the
calibration coefficients. This two-point adjustment needs to be performed
after a sensor change. Follow the more detailed calibration instructions
on page 56, but instead of the CRH command, use the FCRH command.
>FCRH
RH : 1.82 1. ref ? 0
Press any key when ready...
RH : 74.22 2. ref ? 75
OK
>
OK
indicates that the calibration has succeeded.
Set Calibration Information Text
Syntax: CTEXT<cr>
1. Remove the transmitter unit from the mounting (see page 18) and
press the adjustment button once (see Figure 15 on page 56).
2. Issue the LI command and enter value 0 for offset and value 1 for
gain.
3. Issue the CTEXT command and enter calibration information text.
Set Calibration Date
Syntax: CTEXT<cr>
1. Remove the transmitter unit from the mounting plate (see section
Mounting the Transmitter/Removing the Transmitter Unit on page
18) and press the adjustment button once (see Figure 15 on page
56).
2. Issue the LI command and enter value 0 for offset and value 1 for
gain.
3. Issue the CDATE command and set the calibration date.
Example:
CDATE 2001 12 11
Calibration : 2001-12-11
>