Early Maintenance Feedback (Emf); Emf Counters - Agilent Technologies 1100 Series Service Manual

Early Maintenance Feedback (EMF)

Maintenance requires the exchange of components in the flow path which are
subject to mechanical 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-settable limits have been exceeded. The visual feedback in the user
interface provides an indication that maintenance procedures should be
scheduled.

EMF Counters

The nano pump provides a series of EMF counters for the left and right pump
heads. Each counter increments with pump use, and can be assigned a
maximum limit which provides visual feedback in the user interface when the
limit is exceeded. Each counter can be reset to zero after maintenance has
been done. The nano pump provides the following EMF counters:
• liquimeter pump A,
• seal wear pump A,
• liquimeter pump B, and
• seal wear pump B.
Liquimeters
The liquimeters display the total volume of solvent pumped by the left and
right pump heads since the last reset of the counters. Both liquimeters can be
assigned an EMF (maximum) limit. When the limit is exceeded, the EMF flag in
the user interface is displayed.
1100 Series Nano Pump Service Manual
Introduction to the Nano Pump 5
205