Introduction to the Fluorescence Detector 7
1100 Series FD Reference Manual 259
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 detector 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 Counters
The detector provides three EMF counters for the lamp. The counters
increment with lamp use, and can be assigned a maximum limit which
provides visual feedback in the user interface when the limit is exceeded. The
counters can be reset to zero after the lamp is exchanged. The detector
provides the following EMF counters:
• number of flashes (low power mode, multiples of 1000 flashes)
• number of flashes (high power mode, multiples of 1000 flashes)
• Flash Lamp Life-Time (value of 0 – 100% as expected lifetime factor
calculated from combined expected lifetime low power and high power
flashes).
Figure 89 on page 260 shows the lamp life based on number of flashes vs. the
input energy. The lamp flash frequency/energy can be changed into the
following modes:
Tabl e 56 Flash Lamp Modes
Position 296 Hz (Standard), 560 V 63 mJoule (18.8 W)
74 Hz (Economy), 560 V 63 mJoule (4.7 W)
Rotation (Multi Ex/Em) 74 Hz (Standard), 950 V 180 mJoule (13.3 W)
74 Hz (Economy), 560 V 63 mJoule (4.7 W)
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