User manual

134 1260 Nanoflow Pump User Manual
9 Maintenance
Early Maintenance Feedback (EMF)
EMF Counters
The pump provides a series of EMF counters for the pump head. 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 pump
provides the following EMF counters:
• liquimeter pump A,
• seal wear pump A,
• liquimeter pump B,
• 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.
Seal Wear Counters
The Seal Wear Counters display a value derived from pressure and flow (both
contribute to seal wear). The values increment with pump usage until the
counters are reset after seal maintenance. Both Seal Wear Counters can be
assigned an EMF (maximum) limit. When the limit is exceeded, the EMF flag in
the user interface is displayed.