For DMT340 series transmitters with the M-sensor, the sensor purge must be performed manually 1 hour before adjusting the dew
point.
For DMT340 series transmitters, the reference temperature of the dew point should be −57 ... −67 ˚C (−70.6 ... −88.6 ˚F).
To adjust DMT340 dew point using DM70, follow the instructions below.
First carry out 1 ... 7 . In 8, choose one of the two
alternative methods for completing the adjustment.
Turn off DM70.
Connect the cable 211339 between DMT340 (service port) and DM70 (connector I or II). Turn on both devices.
Set the probe to the reference condition. Follow the stabilization from the graphic display by pressing
Graph. The minimum recommended stabilization time for this critical adjustment is 5 hours.
Perform the manual purge if necessary.
Press the ADJ button on the DMT340 component board to enable the adjustment mode.
From the list of parameters, select Td/f I/II
You are prompted to check the settings: make sure that the pressure units of DM70 and DMT340 are the same. If not, change the unit by pressing
Unit on the corresponding row.
At this point you need to select the adjustment method. If the reference probe is connected, 2 options are displayed: To same as Td/f I/II (see To same as Td/f I/II) or 1-point adjustment (see 1-point adjustment).
If you are using DM70 as a terminal, only 1-point adjustment is possible.