Land 4500 MKII Premier, Operation And Maintenance Manual

Page: 126 / 139

Model 4500 Premier Dust and Opacity Monitor
126
C6-2 Maintenance
The Land Instruments International Model 4500 Premier has been designed for a minimal amount
of routine maintenance . To ensure a maximum monitor lifetime however, the following maintenance
schedule has been developed. Remember that the air purge system should always be left on, even if
the boiler is off, to prevent any contamination of the optics. In exceptionally dirty facilities, the time
periods below should be shortened. Frequent “Op0 limited” alarms or blower faults may indicate a
need to shorten the maintenance period.
ITEM PART MAINTENANCE PROCEDURE
Air Hoses 318.239 90 Days Examine hoses for holes or leaks.
Test all hose clamps for tightness.
Pre-filter 701.983 90 Days Dust level should be below the line.
(Where fitted) Remove, empty, wipe out, and replace.
Filter cover N/A 90 Days Remove the filter from the filter housing.
/Rubber cup Remove the rubber cup. Empty the cup,
(Where fitted) wipe out, and replace.
Filter Element 317.441 90 Days Wear eye protection, tap gently to remove
dust. Clean carefully with a blow gun.
Examine for holes or rips. Re-fit.
Annually Replace with new filter.
Blower 90 Days Check for bearing noise. (Bearing
failure, and subsequent blower failure,
can be detected early.) Check blower air
flow to be sure that the blower is
performing normally. (Dirty air filters may
reduce air flow and cause undue stress
on the blowers.)
Optics N/A 90 Days Check and clean the optics as described
below.
Air Purge N/A 90 Days Open the Transmissometer or
Adapter Retro-Reflector on its hinge and check
that there is no ash buildup inside the
adapter that could block the light path.