Vaisala DPT146 - Manual (Page 55)

Chapter 6 _______________________________________________________________ Maintenance
VAISALA ________________________________________________________________________ 53
CHAPTER 6
MAINTENANCE
This chapter provides information that is needed in basic maintenance of
the DPT146.
Periodic Maintenance
Cleaning
The body of the transmitter can be cleaned by wiping with a moistened
lint-free cloth. Do not immerse the transmitter in liquid, and do not use
cleaning agents or solvents.
Changing the Filter
Replace the filter if it is contaminated. New filters and related accessories
are available from Vaisala; see section Spare Parts and Accessories on
page 64.
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, handle the filter from the top of the filter body.
Inspect the sealing ring for damage (used with ISO and UNF threads
only), and replace it if necessary.