1260 Infinity Binary Pump User Manual 77
Using the Pump
4
Prevent Blocking of Solvent Filters
Checking the Solvent Filters
The solvent filters are located on the low- pressure side of the binary
pump. A blocked filter therefore does not necessarily affect the high
pressure readings of the pump. The pressure readings cannot be used to
check whether the filters are blocked or not. If the solvent cabinet is
placed on top of the binary pump, the filter condition can be checked in
the following way:
Remove the solvent inlet tube from the inlet port of the solvent selection
valve or the adapter at the active inlet valve. 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.
Cleaning the Solvent Filters
• Remove the blocked solvent filter from the bottle- head assembly and
place it in a beaker with concentrated nitric acid (35%) for one hour.
• Thoroughly flush the filter with HPLC- grade water (remove all nitric
acid, some capillary columns can be damaged by nitric acid).
• Replace the filter.
When opening capillary or tube fittings, solvents may leak out.
The handling of toxic and hazardous solvents and reagents can carry health risks.
➔ Observe appropriate safety procedures (for example, wear 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.
Never use the system without solvent filter installed.
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