Early Maintenance Feedback (Emf); Emf Counter - Agilent Technologies 1100 Series Reference Manual

Early Maintenance Feedback (EMF)

Maintenance requires the exchange of components which are subject to wear or stress.
Ideally, the frequency at which components are exchanged should be based on the
intensity of usage of the instrument and the analytical conditions, and not on a
predefined time interval. The early maintenance feedback (EMF) feature monitors the
usage of specific components in the instrument, and provides feedback when the user-
selectable limits have been exceeded. The visual feedback in the user interface provides
an indication that maintenance procedures should be scheduled.

EMF Counter

The detector module provides a EMF counter for the lamp. The counter increments with
lamp use, and can be assigned a maximum limit which provides visual feedback in the
user interface when the limit is exceeded. The counter can be reset to zero after the lamp
is exchanged. The detector provides the following EMF counters:
• Deuterium Lamp On-Time
Using the EMF Counters
The user-settable EMF limits for the EMF counter enables the early maintenance
feedback to be adapted to specific user requirements. The useful lamp burn time is
dependent on the requirements for the analysis (high or low sensitivity analysis,
wavelength, and so on), therefore, the definition of the maximum limits need to be
determined based on the specific operating conditions of the instrument.
Setting the EMF Limits
The setting of the EMF limits must be optimized over one or two maintenance cycles.
Initially, no EMF limit should be set. When instrument performance indicates
maintenance is necessary, take note of the values displayed by lamp counters. Enter
these values (or values slightly less than the displayed values) as EMF limits, and then
reset the EMF counters to zero. The next time the EMF counters exceed the new EMF
limits, the EMF flag will be displayed, providing a reminder that maintenance needs to
be scheduled.
1100 Series Variable Wavelength Detector Reference Manual 183
Introduction to the Variable Wavelength Dector
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