Preventive Maintenance - Emerson Rosemount Apex Reference Manual

™
APEX and APEX Sentry
PREVENTIVE
MAINTENANCE
Product Buildup
Refer to "Safety Messages" on page 4-1 and for more information.
4-2
™
Radar Gauge
High voltage that may be present on leads could cause electrical shock:
• Avoid contact with leads and terminals.
• Make sure the main power to the APEX Radar Gauge is off and the lines to any
other external power source are disconnected or not powered while wiring the
gauge.
As a matter of routine, shut off the APEX Radar Gauge and all other equipment in the
tank before you enter the tank.
People who handle products exposed to a hazardous substance can avoid injury if they are
informed and understand the hazard.
Return of Materials: If the product being returned was exposed to a hazardous substance
as defined by OSHA, a copy of the required Material Safety Data Sheet (MSDS) for each
hazardous substance identified must be included with the
returned products.
The APEX and APEX Sentry Radar Gauges have built-in diagnostics and
self-tests that generate alarms if certain failures occur. In addition, there are a
few basic things you may want to check periodically to prevent problems
from occurring.
Use only the procedures and new parts specifically referenced in this manual
to ensure specification performance and certification compliance.
Unauthorized procedures or parts may affect product performance and the
output signal used to control a process.
If you have a process that produces condensate or is prone to coating, check
the radar antenna for product buildup. If buildup appears on the inside or
outside of the antenna, clean it with a solvent that will not damage the SST
antenna material, flange, or PTFE/ceramic waveguide.
Splashing and Coating
• Horn antennas can be recessed into the nozzle to protect against
coating.
- Gas purge can be used
- Intermittent water purge can be used.
• In other cases, periodic cleaning might be required.
Flushing Connection
A flushing connection (Figure 4-1) may be installed to prevent corrosion on
the radar antenna.
Reference Manual
00809-0100-4731, Rev FA
April 2003