Vaisala DRYCAP® Dew Point and Temperature Transmitter Series DMT340 can be adjusted using a correctly adjusted DM70 as a reference dew point meter. Note that dew point adjustment should be carried out in laboratory conditions and not in the field. The adjustment procedure for DMT340 using DM70 as a reference is very similar to the adjustment of the DMP74B/DMP74C probes.
You can also use the MI70 indicator without the reference probe as a terminal to display the measurement readings and to control the adjustment functions when making adjustment of DMT340. This is especially useful with transmitters without display. For instructions, see Td/f adjustment of DMT340 series transmitters using DM70.