Vaisala MMT330 - Manual (Page 158)

User's Guide _______________________________________________________________________
156 __________________________________________________________________ M210733EN-G
Using Serial Line
1. Press the ADJ key on the motherboard to open the adjustment
mode.
2. Remove the probe filter and insert the probe into the reference
temperature.
3. Enter the command CT and press ENTER.
4. Type C and press ENTER a few times to check if the reading is
stabilized. Let the reading stabilize, give the reference temperature
after the question mark and press ENTER three times.
When having another reference temperature (2-point calibration)
press ENTER only twice and insert the probe to the second
reference. When the reading is stabilized, give the second reference
temperature after the question mark and press ENTER. Note that
the difference between the two temperature references must be at
least 30 ºC.
Example (one-point adjustment):
>ct
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? c
T : 16.06 Ref1 ? 16.0
Press any key when ready ...
T : 16.06 Ref2 ?
OK
>
5. OK indicates that the calibration has succeeded. Give the
calibration information (date and text) to the transmitter's memory;
see the serial commands CTEXT and CDATE.
6. Press the ADJ button on the motherboard to close the adjustment
mode.
7. Take the probe out of the reference conditions and replace the
filter.