Thermo Scientific Accela 1250, Hardware Manual

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1
Introduction
Hardware Components
Thermo Scientific Accela 600 and 1250 Pump Hardware Manual 3
These pumps use a force sensor feedback controller, which continuously calibrates valve
timing and pumping efficiency based on the measured compressibility of the solvent. This
patented feature enables these pumps to form accurate gradients virtually pulsation-free; no
pulse damping device is required.
The integral vacuum degasser offers superb solvent degassing efficiency using a built-in
vacuum membrane degasser that removes dissolved gasses from the mobile phase.
The Accela 600 Pump and the Accela 1250 Pump are benchtop units that you can integrate
with other Accela instruments.
Hardware Components
The Accela 600 Pump and the Accela 1250 Pump have these major components: the vacuum
degasser assembly, the LDA, a 65 μL static mixer, an optional dynamic mixer, an optional seal
wash pump, and an optional leak sensor. The status LEDs on the left door of the pump
enclosure display the power, communication, run, and degas states of the pump.
Figure 2 shows the front panel of the Accela 1250 Pump as shipped, without any of the
optional hardware installed.
Note The proportioning valves on pumps shipped before August 2011 differ from those
shown in Figure 2 . For information about the original proportioning valves, see
Appendix A, “Legacy Hardware Components.”