Vaisala MMT310 - Manual (Page 61)

Chapter 6 ____________________________________________________ Calibration and adjustment
VAISALA ________________________________________________________________________ 61
Relative Humidity Calibration after
Sensor Change
Syntax: FCRH
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
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
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
>