Early Maintenance Feedback (Emf); Emf Counter; Using The Emf Counters - Agilent Technologies G1314B VWD User Manual

1 Introduction to the Variable Wavelength Detector

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
18 1200 Series Variable Wavelength Detector User Manual