Metrohm viva 1.0 (process analysis) - Manual (Page 965)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
9 Support
viva 1.0 (for Process analysis)
￭￭￭￭￭￭￭￭ 953
Problem Cause Remedy
The peak is no lon-
ger recognized. The reference potential has
shifted. Perform maintenance procedure for the refer-
ence electrode in accordance with the elec-
trode leaflet.
The signal does not
decrease in spite of
suppressor addition. No chloride is contained in
the Cu VMS. Check the preparation of the Cu VMS and
modify it if required.
9.2.2 Peripheral devices
Problem Cause Remedy
The 800 Dosino can-
not be actuated by
the 894 Professional
CVS. The connection between
the 800 Dosino and the
894 Professional CVS is
either interrupted or an
error has occurred on the
800 Dosino. ￭ Check the cable connections.
￭ Disconnect the 894 Professional CVS from
the power supply and connect it again.
￭ Check the dosing and filling rate.
￭ Contact the Metrohm Service department if
necessary.
The data of the dos-
ing unit cannot be
read. The data chip of the dosing
unit is mechanically dam-
aged or impaired by chem-
icals. ￭ Remove the dosing drive and attach it
again.
￭ 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.