7 eluent degasser, 8 high-pressure pump, Eluent degasser – Metrohm 940 Professional IC Vario ONE/ChS/HPG User Manual

Page 103: High-pressure pump

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7 Technical specifications

940 Professional IC Vario ONE/ChS/HPG (2.940.1240)

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95

7.7

Eluent degasser

Material

Fluoropolymer

Resistance to sol-
vents

No restriction (except PFC)

Time to establish
vacuum

< 60 s

7.8

High-pressure pump

Type

Serial dual-piston pump

Intelligent pump head recognition

Chemically inert

Metal-free pump heads

Materials in contact with the eluent: PEEK, ZrO

2

, PTFE/PE

Self-optimizing flow and pressure

Flow rate

Adjustable flow
range

0.001 - 20.0 mL/min

Flow increment

1 µL/min

Reproducibility
of the eluent
flow

< 0.1% deviation

Pressure range

Pump

0 - 50.0 MPa (0 - 500 bar)

Pump head

0 - 35.0 MPa (0 - 350 bar) (applies for the standard PEEK pump head)

Residual pulsa-
tion

< 1%

Safety shutdown

Function

Automatic shutdown upon reaching the pressure limit values

Maximum pres-
sure limit

Adjustable from 0.1 - 50 MPa (1 - 500 bar)

The pump is automatically shut down at the first piston stroke
above the maximum limit value

Minimum pres-
sure limit

Adjustable from 0 - 49 MPa (0 - 490 bar)

The shutdown mechanism is inactive at 0 MPa

The shutdown mechanism becomes active 2 minutes after system
start

The pump is automatically shut down after 3 piston strokes below
the minimum pressure limit

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