Leak Test; Leak Test Description - Agilent Technologies 1260 Infinity User Manual

8
Test Functions and Calibration

Leak Test

Leak Test

Leak Test Description

The Leak Test is a built-in troubleshooting test designed to demonstrate the
leak-tightness of the pump. The test involves monitoring the pressure profile
as the pump runs through a predefined pumping sequence. The resulting
pressure profile provides information about the pressure tightness and
operation of the pump components.
Ramp 1
The test begins with the initialization of both pumps. After initialization,
pistons A1 and B1 are both at the top of their stroke. Next, the pump begins
pumping solvent with a flow rate of 150 µL/min, stroke of 100 µL, and a
composition of 51 % A, 49 % B. Both pumps deliver for one complete pump
cycle. At the end of this step, pistons A1 and B1 are at the top of their stroke.
Ramp 2
The pump continues pumping solvent with a flow rate of 150 µL/min. Channel
A delivers for one pump cycle (first, piston A2 delivers, then piston A1),
followed by channel B (piston B2, then piston B1), both channels with a stroke
of 20 µL.
Ramp 3
Just before the start of the first plateau, piston A2 delivers with a flow rate of
50 µL/min for approximately 8 s.
Plateau 1
At plateau 1, piston A2 delivers with a flow rate of 3 µL/min for 30 s.
Ramp 4
Piston B2 delivers 50 µL/min for approximately 8 s.
116 1260 Nanoflow Pump User Manual