1260 Infinity Binary Pump User Manual 135
Test Functions and Calibration
8
Pump Elasticity Calibration
Pump Elasticity Calibration
Description
The flow path components of the binary pump have an inherent and
pressure dependent elasticity which differs from pump to pump. When
this elasticity/pressure function is known, a correction algorithm can be
applied. This results in significantly improved pump performance in low
delay volume mode (damper and mixer bypassed).
The pump elasticity calibration uses a solvent with well known properties
(HPLC- grade water) to determine the pump elasticity over the entire
operating pressure range and stores the calibration values in the
non- volatile RAM of the pump mainboard.
The initial calibration is done at the factory. It only needs to be repeated
after replacement of major pump parts (mainboard, pump drive). The test
allows to define which pump head will be calibrated.
Results of the pump elasticity calibration rely on known compressibility parameters for pure
water. If the water is not HPLC-grade, not well degassed or degasser and pump are not
flushed properly, the pump elasticity calibration will fail. The pump elasticity calibration has
to be performed for each pump head individually.
Incorrect pump elasticity calibration.
Solvent compressibility calibrations acquired with a miscalibrated pump will work, but
they are not transferable to other pumps. A correct pump elasticity calibration is an
essential prerequisite for successful solvent compressibility calibrations.
➔ Calibrate the pump elasticity correctly.
To Next Page
Loading...
