Metrohm 850 Professional IC Anion MCS LP-Gradient - Manual (Page 122)

6.1 Problems and their solutions
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850 Professional IC – Anion – MCS – LP Gradient
Problem Cause Remedy
Eluent – Gas bubbles in the
eluent. Check connections of the eluent degasser (see
Chapter 3.10, page 37).
High pressure pump –
defective. Request Metrohm Service.
Vacuum is not being
built Eluent Degasser – Connec-
tor Vacuum on the rear of
the instrument not (tightly)
sealed. ￭ Seal the connector Vacuum tightly with a
6.144.6040 threaded stopper.
or when using an 872 Extension Module:
￭ Connect an FEP tubing between the IC
instrument and the Extension Module and
tighten both clamping screws until they
seal.