Sampling Cells; Connecting To Pressurized Processes Using Dsc74 Sampling Cell - Vaisala DRYCAP DM70 Kurzanleitung

By default, sensor purge is turned on automatically in DM70, and it is recommended not to
turn it off. The purge is performed if humidity changes significantly or quickly and if the dew
point is low enough. If the power is continuously turned on in DM70, or if DM70 has been left in
logging mode (display on or off), the automatic sensor purge will be performed at a set
interval (the default is 24 hours).
If automatic sensor purge has been turned off, the purge should be started manually if it has
not been performed during the last 24 hours. You can start sensor purge manually in the
Functions menu of the MI70 indicator.
For more information on sensor purge, see DM70 User Guide (M010091EN).
3.3 Sampling cells
When the dew point of a process needs to be measured using DM70, the process can be
sampled using one of the following sampling cells:
• DSC74
• DSC74B
• DSC74C
• DSS70A
• DMT242SC
• DMT242SC2
The principle of using a sampling cell in process measurements is described in
pressurized processes using DSC74 sampling cell (page
features of different sampling cell models is available in the DM70 User Guide (M010091EN).
3.3.1 Connecting to pressurized processes using DSC74
sampling cell
• PTFE tape
• Adjustable wrench
• Flat head screwdriver
DSC74 is a Vaisala sampling cell for connecting DM70 to pressurized processes (optional
accessory).
DSC74 comes with a quick connector that fits to industry standard compressed air line
connectors (suitable for type D, Quick08, NIP08). This allows for easy installation and
detachment of the probe without having to shut down the process. Alternative ways to
connect are through the 2 different thread adapters (G3/8" to G1/2" and G3/8" to G1/4" ISO)
that are supplied with each DSC74 unit.
Chapter – Taking measurements
Connecting to
15). Detailed information about the
15