Metrohm 883 Basic IC plus Manual page 88

4.10 Suppressor
4.10.3.3 Cleaning the suppressor
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In the following cases, it may be necessary to clean the suppressor:
Increased backpressure at the suppressor's connection tubing.
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Irremediable blockage of the suppressor (solutions can no longer be
￭
pumped through the suppressor).
Irremediable jamming of the suppressor (suppressor can no longer be
￭
switched over).
Cleaning the suppressor
1 Disconnecting the suppressor from the IC system
Switch off the instrument.
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Disconnect all capillaries of the suppressor from the IC system.
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2 Dismantling the suppressor
Unscrew the union nut (25-1) from the housing (25-5).
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Pull the connecting piece (25-2) out of the suppressor drive
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together with the rotor (25-3).
If rotor A gets stuck in the suppressor drive, you can push it out as
follows:
Put a pointed object into the slot in the suppressor drive and use
it to push out the rotor A.
Loosen the connecting piece from the rotor.
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Remove the rotor from the adapter.
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3 Rinsing the capillaries
Connect each of the 6 PTFE capillaries connected to the connect-
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ing piece (25-2) in sequential order to the high-pressure pump
and pump ultrapure water through them.
Check whether water comes out at the connecting piece.
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If one of the capillaries remains blocked, the connecting piece (25-2)
must be replaced (order number 6.2835.010).
4 Cleaning the rotor
Clean the sealing surface of the rotor (25-3) with ethanol using a
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lint-free cloth.
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883 Basic IC plus