Metrohm 872 Extension Module - Manual (Page 67)

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7 Troubleshooting
872 Extension Module IC Module
￭￭￭￭￭￭￭￭ 59
Problem Cause Remedy
Eluent – Blockage in the
eluent path. Check the eluent path
Precision problems -
significant scatter-
ing of the measured
values Injection valve – sample
loop. Check installation of the sample loop (see
Chapter 4.9.1, page 35).
Sample – rinsing volume
too low. Increase rinsing time (see Chapter 6.7, page
55).
Injection valve – defective. Request Metrohm Service.
Unexpected change
to the retention
times in the chroma-
tograms Eluent – Gas bubbles in the
eluent. Check connections of the eluent degasser (see
Chapter 4.5, page 27).
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
6.1446.040 threaded stopper.