The pump performance is specified as follows:

Type

Specification*

Operating principle

Serial dual-piston pump

Compressibility compensation

Fully automated, independent of the composition of the mobile phase

Flow range (settable)

VC-pump:

0.001 – 10 mL/min in 1 µL/min increments

VF-pump:

0.001 – 8 mL/min in 1 µL/min increments

Flow accuracy

± 0.1%

Flow precision

< 0.05% RSD or < 0.01 min SD, whichever is greater

Pressure range

VC-pump:

2-70 MPa (20-700 bar, 290 – 10100 psi)

With a flow rate of > 5 mL/min, the maximum pressure decreases linearly down to 30 MPa (300 bar, 4350 psi).

VF-pump:

2 – 103 MPa (20 – 1034 bar, 290 – 15000 psi)

With a flow rate of > 5 mL/min, the pressure range decreases linearly down to 80 MPa (800 bar, 11600 psi).

Pulsation

< 1.0% or < 0.2 MPa, whichever is greater

Gradient formation

High-pressure gradient proportioning

Proportioning accuracy

± 0.2% (of full-scale)

Proportioning precision

< 0.15% SD

Number of solvents

2 out of 6

Maximum stroke volume

80 µL

Mixer volume

VC-pump:

Standard configuration: 400 µL mixing system, consisting of a capillary mixer (volume: 50 µL) and a static mixer (volume: 350 µL)

Other mixing systems are available as an option.

VF-pump:

Standard configuration: 200 µL mixing system, consisting of a capillary mixer (volume: 50 µL) and a static mixer (volume: 150 µL)

Other mixing systems are available as an option.

Dwell volume
(contribution of the pump to the system gradient delay volume)

400 µL (in standard pump configuration)

(35 µL to 1550 µL with optionally available mixing systems)

200 µL (in standard pump configuration)

(35 µL to 1550 µL with optionally available mixing systems)

Solvent degassing

Built-in, number of channels: 2 out of 6

Biocompatible

VC-pumps: no

VF-pumps: yes

Communication

USB:

1 USB port (USB 2.0, "B" type connector)

1 USB hub with 3 ports (USB 2.0, "A" type connectors)

I/O Interface:

2 Dig I/O ports (mini-DIN), each providing one input, one relay output, and one bidirectional input/output

System Interlink:

2 system interlink ports (RJ45-8 connectors)

Control

Chromeleon 7

The pump can be operated also with other data systems. For details, contact the Thermo Fisher Scientific sales organization.

Keypad with 5 buttons for performing certain functions directly from the pump

Materials in the analytical flow path

VC-pumps:

Stainless steel, titanium, ceramics, sapphire, PEEK, UHMW PE, fluoropolymers

VF-pumps:

MP35N, titanium, ceramics, sapphire, PEEK, UHMW PE, fluoropolymers

For information about the chemical resistance of materials refer to the technical literature.

Solvent and additive information

See Solvent and Additive Information.

Safety features

Leak detection and safe leak handling, excess pressure monitoring

Good Laboratory Practice (GLP) features

Predictive Performance functions for scheduling maintenance procedures based on the actual operating and usage conditions of the pump.

All system parameters logged in the Chromeleon Audit Trail.

* Typical operating conditions for measurable specifications:
Flow accuracy, flow precision, pulsation: 1 mL/min at 20 MPa or 2 mL/min at 40 MPa, water
Proportioning accuracy, proportioning precision: 1 mL/min at 20 MPa or 2 mL/min at 40 MPa, 0-100%, water/spiked water