Maintenance and care
HS 55 (Batch Mode)
40
}
Then flush the cell windows with distilled water and allow them to dry without any
residues, e.g., by purging them with an inert gas.
ü
The cell windows have been cleaned.
Cleaning the cell
}
After the cell unit has cooled down: unlock and unfold the cell unit.
}
Remove the cell and pull off the hoses.
}
Clean the cell for 5 to 10 min in cold, concentrated hydrofluoric acid HF (40 %).
WARNING! Hydrofluoric acid is highly corrosive and toxic.
}
Remove the detached dirt film from the inside of the tube by intensive brushing with
a round brush under running water.
}
Flush the cell with distilled water and allow it to dry without any residues, e.g., by
purging.
}
Place the cell into the cell unit. Lock the cell unit.
}
Attach the cell windows with frames on both sides of the cell and clamp them in
place with the blade springs. Check whether the cell windows seal the cell tightly.
ü
The cell has been cleaned.
6.4
Inspecting and replacing the pump hose
CAUTION
Risk of chemical burns due to basic solution
The hoses contain the basic reduction agent solution.
¡
Prior to any maintenance work, close the software and clean the system as sug-
gested. The Hg/hydride system flushes the hoses and pumps them out after re-
moval from the flushing solution.
Regularly inspect the pump and metering hoses for the reduction agent visually for
wear, stubborn contamination and deformation. If excessive wear or contamination is
detected, the complete hose set for the reduction agent (intake hose, pump hose, me-
tering hose) must be replaced.
Note that the hoses also have to be replaced when the reduction agent is changed
(NaBH
4
- SnCl
2
).
}
Release the clamping screw at the batch module and pull out the metering hose
(MFA).
}
Unhook the hose cartridge, remove the pump hose.
}
Insert the new pump hose into the cartridge. Note the pumping direction.
}
Hook in the hose cartridge and press it on.
}
Feed the new metering hose (MFA) into the batch module. Tighten the clamping
screw firmly.
NOTICE! The hose end must be approx. 10 mm above the pipette tip in the batch
module.
}
Insert the intake hose into the storage bottle for reduction agent up to the stopper.
ü
The new hose set is ready for operation.
