Vaisala DM70 - Manual (Page 58)

USER'S GUIDE____________________________________________________________________
(1.2 ... 20 bar), detach the flexible tube from the flowmeter. See
Figure 25 on page 55.
3. Remove the inlet/outlet plugs.
4. Insert the 1/4" tubing into the IN fitting. Tighten the nut 11/4
turns with an open-ended, 14-mm spanner to make a gas-tight
fitting. In future, only slight tightening with an open-ended
spanner is needed to make a gas-tight fitting. Insert the tubing
into the OUT fitting, if needed.
5. If the process is not pressurized, turn on the pump. If the process
is pressurized, do not turn the pump on.
6. Adjust the sample flow using the sample valve, for example,
150 l/h = 2.5 l/min.
7. Turn on the MI70 indicator.
8. Set the pressure to represent the sample pressure. For details, see
section Pressure Settings on page 36.
9. Wait until the reading has stabilized.
10. After the measurements, turn off the pump, remove the tubes,
and put the inlet/outlet plugs back into their places.
CAUTION Be careful when taking samples from hot processes. Do not touch the
hot sampling lines without suitable protective clothing.
NOTE The measured dewpoints must always be lower than the ambient
temperature or DSS70A probe temperature to avoid condensation in
the system. If condensation occurs, stop sampling and dry the system
by circulating ambient air in the system.
Prevent liquids from entering the DSS70A sampling line as this may
damage the product.
DSS70A Maintenance
Recharging the Battery
The battery must be recharged when the charger meter shows 10.5 V
or less. DSS70A is powered by a battery, fitted underneath the system.
MI70 uses its own battery when it is connected to DSS70A.
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