Vaisala DMT346 - Manual (Page 39)

Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 39
Probe and Cooling Set Mounting with Process Shut
Down
Complete the entire mounting process as instructed on page 37.
Probe and Cooling Set Mounting with Process
Running
Follow this procedure to reduce the amount of condensation that builds
up in the installation hole.
1. First mount the cooling element (and fins) to warm it up; tightly
plug the hole for the probe in the cooling element for the duration
of the warmup period.
2. After a few hours, complete the installation by installing the probe.
Removing the Transmitter for Maintenance
If you remove the transmitter from the process to send it to service etc.,
leaving the cooling set in its place, make sure you plug tightly the hole
for the probe in the cooling element. This will lessen the amount of
condensation that builds up in the hole.