Metrohm viva 1.1 (ProLab) - Manual (Page 1055)

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9 Support
viva 1.1 (for process analysis)
￭￭￭￭￭￭￭￭ 1043
Problem Cause Remedy
￭ Clean the data chip and the contact sur-
faces.
￭ Have the data chip replaced by the
Metrohm Service department.
The dosing unit is
blocked and/or leak-
ing. Crystals have formed (in
the dosing cylinder, on the
valve disk or in the capil-
lary). ￭ Check the flow path.
￭ Rinse the dosing unit and the connected
tubings and capillaries (Prepare function)
when the measuring system is not in use.
￭ Clean the dosing unit at least every two
weeks.
The dosing unit is
recognized either
not at all or incor-
rectly. The dosing drive was not
attached correctly. ￭ Remove the dosing drive and attach it
again.
￭ Check whether the dosing drive is correctly
seated.
￭ Disconnect the 894 Professional CVS from
the power supply and connect it again.
￭ Contact the Metrohm Service department if
necessary.
The membrane
pumps of the 843
Pump Station do not
operate at full pump
capacity. The cables are not or not
correctly connected. Connect the cables in accordance with the
instructions in the Manual 894 Professional
CVS.
The tubing connections are
leaking. Check the tubing connections and tighten, if
necessary.
The rinse and/or waste
canister is sealed air-tight. Loosen the lids on the canisters a little or
remove them.
The pump time of
the peristaltic pump
increases. The pump tubing of the
peristaltic pump has aged
or is defective. Replace the pump tubing.
The sample is not
completely transfer-
red from the Sample
Processor to the
measuring vessel via
the peristaltic pump. The PEEK needle on the
Sample Processor is posi-
tioned more than 0.5 mm
from the floor of the sam-
ple vial. Position the PEEK needle in accordance with
the instructions in the Manual 894 Profes-
sional CVS.
The contact pressure set
for the tubing cartridge is
insufficient. Set the contact pressure of the tubing car-
tridge in accordance with the Sample Pro-
cessor manual.