Vaisala DM70 - Manual (Page 20)

USER'S GUIDE____________________________________________________________________
3. Install the probe to the measuring position. If you are measuring
in pressurized processes, see section Connection to Pressurized
Processes Using the DSC74 Sampling Cell on page 52. When
using other sampling cells than DSC74, make sure that the
threads are compatible with the probe threads (G ½" ISO228/1).
Be careful not to damage the sintered filter when installing the
probe.
4. Before measuring, make sure that the air pressure settings of
DM70 are correct and that auto-calibration has taken place (see
section Automatic Auto-Calibration on page 27)
5. The basic display opens. Let the reading stabilize.
CAUTION If you need to disconnect the probe from the indicator, first press the
Power On/Off button to turn the indicator off. This ensures that all
the settings and data are saved properly.
NOTE When measuring low dewpoints, the stabilization times can be long,
for example, one to two hours. Therefore, turn off the automatic
power-off function (see section Automatic Power Off on page 38),
turn on the automatic auto-calibration (see section Automatic Auto-
Calibration on page 27), and turn on the automatic sensor purge (see
section Turning on/off Automatic Sensor Purge on page 30).
Thus, the stabilization can be monitored, the auto-calibration ensures
an accurate measurement, and the purge ensures the shortest possible
response times.
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