User manual

136 1260 Nanoflow Pump User Manual

9 Maintenance

Checking and Cleaning the Solvent Inlet Filters

When If solvent filter is blocked

Parts required Description

Concentrated nitric acid (65 %)

Bidistilled water

Beaker

Preparations Remove the solvent inlet tube from the inlet port of the solvent selection valve or the adapter at the

active inlet valve

WARNING

When opening capillary or tube fittings solvents may leak out.

The handling of toxic and hazardous solvents and reagents can bear health risks.

➔ Please observe appropriate safety procedures (for example, goggles, safety gloves

and protective clothing) as described in the material handling and safety data sheet

supplied by the solvent vendor, especially when toxic or hazardous solvents are

used.

CAUTION

Small particles can permanently block the capillaries and valves of the module.

Damage of the module.

➔ Always filter solvents.

➔ Never use the module without solvent inlet filter.

NOTE

The solvent filters are located on the low-pressure side of the pump. A blocked filter

therefore does not affect the pressure readings of the pump. The pressure readings cannot

be used to check whether the filter is blocked or not.

NOTE

If the filter is in good condition the solvent will freely drip out of the solvent tube (due to

hydrostatic pressure). If the solvent filter is partly blocked only very little solvent will drip

out of the solvent tube.