Nautel NX15, Operation And Maintenance Manual

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NX15/NX25 Operations and Maintenance Manual Routine maintenance
Issue 6.0 2019-01-31 Page 3-1
Section 3: Routine maintenance
This section provides instructions for performing routine maintenance on the NX15/NX25
transmitter. This section includes the following topics:
• Scheduled maintenance
• Replacing the air filter - see page 3-2
• Performing on-air checks - see page 3-5
• Replacing the Control/Interface PWB battery - see page 3-6
• Inspecting lightning protection systems - see page 3-7
Scheduled maintenance
Scheduled maintenance consists of performing a visual inspection of the NX15/NX25 at
scheduled intervals. The recommended minimum time between scheduled maintenance visits
is three months. Local operating and environmental conditions may dictate more frequent
visits, while in remote sites less frequent visits may be acceptable. Experience and system
reliability will determine the most practical schedule for a specific installation.
Cleaning
At a minimum, follow the cleaning procedures listed below.
1. Clean the air filter (if present), noting there is one in the rear door (see Figure 3.1 on
page 3-4 ). Remove the air filter by sliding it up and out of the retaining brackets, rinse
it with water, spray both sides of the air filter with Handi-Koter filter coat (Nautel
Part # HQ59, located in the ancillary kit), then re-install the air filter. If the air filter
becomes damaged, replace it as soon as possible. See “Replacing the air filter” on
page 3-2 .
Note:
A site located in a dirty area using open-air cooling requires more extensive cleaning
than a site located in a clean area using closed-air cooling.
CAUTION:
You must remove air filters before using the filter coat adhesive spray. The spray will
contaminate the inside of the transmitter, cause accelerated dust/dirt buildup and
compromise critical spacings for voltage breakdown.