Vaisala DMT143 - Manual (Page 62)

USER'S GUIDE ____________________________________________________________________
60 ___________________________________________________________________ M211435EN-E
Changing the Filter
Replace the filter if it is contaminated. New filters are available from
Vaisala; see section Spare Parts and Accessories on page 72.
CAUTION Be careful when changing the filter, since it is easy to break the sensor
when the filter is removed.
CAUTION If the transmitter is installed in a pressurized chamber, always make sure
that the pressure of the chamber is equalized with the ambient pressure
prior to removing the transmitter. When the transmitter is removed for
maintenance, cap the hole with a capped nut. This way, the chamber can
be pressurized although the transmitter is not in place.
Plugs are available from Vaisala for ISO and NPT threaded connections.
When replacing the filter, wear clean gloves to avoid depositing dirt or
oil on the filter. Inspect the sealing ring for damage (used with ISO
thread only), and replace it if necessary.
Replace the filter as follows:
1. Turn the filter counterclockwise until it is loose.
2. Pull the filter straight out carefully. Do not damage the sensor.
1203-045
Figure 22 Removing the Filter
3. Take the new filter, and insert it to the filter thread.
4. Tighten the new filter to 5 Nm by turning it clockwise.