However, regular cleaning may be needed under severe conditions.
Adjust the inspection rate to match your particular environment.
Initially, perform inspections every six months at a minimum.
Increase the inspection frequency if:
• the unit requires cleaning at every inspection
• diagnostics report that cleaning is required more frequently than
the inspection rate.
Conversely, if the inspections rarely show that cleaning is required, the
inspection rate may be decreased. A good practice is to perform
inspections at twice the rate that cleaning is historically required. If the
windows appear dirty during the inspection, perform the XIR cleaning
procedure given in Chapter 4 of the Ultima X Series Gas Monitor
instruction manual (P/N 10036101).
NOTE: Personnel performing Ultima X proof test should be trained in
SIS operations, including bypass procedures, Ultima X Monitor
maintenance and company management of change procedures.
Repair and Replacement
Fault Conditions
The Ultima X has numerous self diagnostics that are run periodically to
detect problems in the device. When problems are found:
• messages appear on the LCD display
• depending on the severity of the problem, the analog output may
be set to 3.0 mA and the fault relay de-energized.
• The analog output or fault relay must be connected to
equipment that alerts the user that a problem exists or takes
action to move the system into a safe state.
When a fault is indicated:
• observe the LCD display for fault details.
• fix faults within the system repair time (the repair time used in
probability of failure calculations according to IEC 61508)
• Actions to correct a fault are given in TABLE 4-3 of the Ultima
X Series Gas Monitor instruction manual (P/N 10036101).
NOTE: Personnel performing Ultima X repair or replacement should be
trained in SIS operations, including bypass procedures, Ultima
X Monitor maintenance and company management of change
procedures.
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